|                        | **United                  States Securities and Exchange Commission**         |
|-----------------------------|-------------------------------------------------------------------------------|
|                        |                                                                          |
|                        | **Washington,                  D.C. 20549**                                   |
|                        |                                                                          |
|                        | **Form                  10 QSB**                                              |
|                        |                                                                          |
| (Mark                  One) |                                                                          |
|                        |                                                                          |
| **R**                       | **QUARTERLY                  REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE** |
|                        | **SECURITIES                  EXCHANGE ACT OF 1934**                          |
|                        |                                                                          |
|                        | For                  the quarterly period ended September 30, 2006            |
|                        |                                                                          |
| o                           | **TRANSITION                  REPORT UNDER SECTION 13 OR 15 (d) OF THE**      |
|                        | **SECURITIES                  EXCHANGE ACT OF 1934**                          |
|                        |                                                                          |
|                        | For                  the transition period from _____ to _____                |
|                        |                                                                          |
|                        | Commission                  file number 333-127355                            |
|                        |                                                                          |
|                        |                                                                          |
|                        | **ATLAS                  AMERICA PUBLIC #15-2005 (A) L.P.**                   |
|                        | (Name                  of small business issuer in its charter)               |
|                        |                                                                          |

|                                                                                                                                                                                    |                                                                  |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|
|                                                                                                                                                                                    |                                                                  |
| **Delaware**                                                                                                                                                                            | **20-3208344**                                                        |
| (State                  or other jurisdiction ofincorporation                  or organization)                                                                                         | (I.R.S.                  EmployerIdentification                  No.) |
|                                                                                                                                                                                    |                                                                  |
| 311                  Rouser Road                                                                                                                                                        | 15108                                                                 |
| Moon                  Township, PA                                                                                                                                                      | (zip                  code)                                           |
| (Address                  of principal executive offices)                                                                                                                               |                                                                  |
|                                                                                                                                                                                    |                                                                  |
| Issuer’s                  telephone number, including area code: **(412)                  262-2830**                                                                              |
|                                                                                                                                                                                    |
| Check                  whether the issuer (1) filed all reports required to be filed by                  Section                  13 or 15 (d) of the Exchange Act                      |
| during                  the past 12 months (or for such shorter period that the registrant                  was                  required to file such reports),                        |
| and                  (2) has been subject to such filing requirements for the past 90                  days.                  Yes** ****R**                  No                  o |
|                                                                                                                                                                                    |
| Indicate                  by check mark whether the registrant is a shell company (as defined                  in                  Rule 12b-2 of the Exchange                           |
| Act).Yes                  o                  No                  **R**                                                                                                                  |
|                                                                                                                                                                                    |
| Transitional                  Small Business Disclosure Format (check one): Yes o                  No                  **R**                                                            |

----

**ATLAS        AMERICA PUBLIC #15-2005 (A) L.P.**

**INDEX        TO QUARTERLY REPORT**

**ON        FORM 10-QSB**

| **PART                    I.**  |   | **FINANCIAL                    INFORMATION**                                                                                     | **PAGE** |
|---------------------------------|--------|----------------------------------------------------------------------------------------------------------------------------------|----------|
|                            |   |                                                                                                                             |     |
| Item                    1:      |   | Financial                    Statements                                                                                          |     |
|                            |   |                                                                                                                             |     |
|                            |   | Balance                    Sheets as of September 30, 2006 and December 31, 2005                    (Unaudited)                  | 3        |
|                            |   |                                                                                                                             |     |
|                            |   | Statements                    of Operations for the Three and Nine months ended September 30,                    2006            |     |
|                            |   | (Unaudited)                                                                                                                      | 4        |
|                            |   |                                                                                                                             |     |
|                            |   | Statement                    of Partners’ Capital Accounts for the Nine months ended September 30,                    2006 |     |
|                            |   | (Unaudited)                                                                                                                      | 5        |
|                            |   |                                                                                                                             |     |
|                            |   | Statement                    of Cash Flows for the Nine months ended September 30, 2006                                          |     |
|                            |   | (Unaudited)                                                                                                                      | 6        |
|                            |   |                                                                                                                             |     |
|                            |   | Notes                    to Financial Statements (Unaudited)                                                                     | 7-12     |
|                            |   |                                                                                                                             |     |
| Item                    2:      |   | Management’s                    Discussion and Analysis of Financial Condition or Plan of                    Operations    | 12-14    |
|                            |   |                                                                                                                             |     |
| Item                    3:      |   | Controls                    and Procedures                                                                                       | 14       |
|                            |   |                                                                                                                             |     |
| **PART                    II.** |   | **OTHER                    INFORMATION**                                                                                         |     |
|                            |   |                                                                                                                             |     |
| Item                    6:      |   | Exhibits                                                                                                                         | 15       |
|                            |   |                                                                                                                             |     |
|                            |   |                                                                                                                             |     |
| **SIGNATURES**                  | 16     |
|                            |   |                                                                                                                             |     |
| **CERTIFICATIONS**              | 17-20  |

----

**PART        I**

**ITEM        1.**
**FINANCIAL        STATEMENTS**

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**BALANCE        SHEETS**

**(Unaudited)**

|                                                         |   | **September                  30,** |       | **December                  31,** |   |
|--------------------------------------------------------------|--------|------------------------------------|------------|-----------------------------------|--------|
|                                                         |   | **2006**                           |       | **2005**                          |   |
|                                                         |   |                               |       |                              |   |   |   |
| **ASSETS**                                                   |   |                               |       |                              |   |   |   |
| Current                  Assets:                             |   |                               |       |                              |   |   |   |
| Cash                  and cash equivalents                   |   | $                                  | 201,600    |                              | $      | 2,168,100 |   |
| Accounts                  receivable-affiliate               |   |                               | 5,474,500  |                              |   | 50,918,800 |   |
| Hedge                  receivable short-term-affiliate       |   |                               | 1,875,400  |                              |   | ― |   |
| Total                  current assets                        |   |                               | 7,551,500  |                              |   | 53,086,900 |   |
|                                                         |   |                               |       |                              |   |   |   |
| Oil                  and gas properties, net                 |   |                               | 60,756,400 |                              |   | 1,829,900 |   |
|                                                         |   |                               |       |                              |   |   |   |
| Hedge                  receivable long-term-affiliate        |   |                               | 2,006,400  |                              |   | ― |   |
|                                                         |   | $                                  | 70,314,300 |                              | $      | 54,916,800 |   |
|                                                         |   |                               |       |                              |   |   |   |
| **LIABILITIES                  AND PARTNERS’ CAPITAL** |   |                               |       |                              |   |   |   |
| Current                  liabilities:                        |   |                               |       |                              |   |   |   |
| Accrued                  liabilities                         |   | $                                  | 14,900     |                              | $      | 13,200 |   |
| Accounts                  payable-affiliate                  |   |                               | ―    |                              |   | 2,168,000 |   |
| Total                  current liabilities                   |   |                               | 14,900     |                              |   | 2,181,200 |   |
|                                                         |   |                               |       |                              |   |   |   |
| Asset                  retirement obligation                 |   |                               | 1,148,900  |                              |   | 135,900 |   |
| Hedge                  liability long-term-affiliate         |   |                               | 192,500    |                              |   | ― |   |
|                                                         |   |                               |       |                              |   |   |   |
|                                                         |   |                               |       |                              |   |   |   |
| Partners’                  capital:                    |   |                               |       |                              |   |   |   |
| Managing                  general partner                    |   |                               | 12,776,300 |                              |   | 362,400 |   |
| Limited                  partners (5,227.40 units)           |   |                               | 52,492,400 |                              |   | 52,237,300 |   |
| Accumulated                  comprehensive income            |   |                               | 3,689,300  |                              |   | ― |   |
|                                                         |   |                               | 68,958,000 |                              |   | 52,599,700 |   |
|                                                         |   | $                                  | 70,314,300 |                              | $      | 54,916,800 |   |

----

**ATLAS        AMERICA PUBLIC #15-2005 (A) L.P.**

**STATEMENTS        OF OPERATIONS **

**(Unaudited)**

|                                                       |   | **Three                  Months**       |      | **Nine                  Months**        |   |
|------------------------------------------------------------|--------|-----------------------------------------|-----------|-----------------------------------------|--------|
|                                                       |   | **Ended**                               |      | **Ended**                               |   |
|                                                       |   | **September                  30, 2006** |      | **September                  30, 2006** |   |
|                                                       |   |                                    |      |                                    |   |   |   |
| **REVENUES:**                                              |   |                                    |      |                                    |   |   |   |
| Natural                  gas and oil sales                 |   | $                                       | 4,337,300 |                                    | $      | 7,018,700 |   |
| Interest                  income                           |   |                                    | 1,800     |                                    |   | 1,900 |   |
| Total                  revenues                            |   |                                    | 4,339,100 |                                    |   | 7,020,600 |   |
|                                                       |   |                                    |      |                                    |   |   |   |
| **COSTS                  AND EXPENSES:**                   |   |                                    |      |                                    |   |   |   |
| Production                  expenses                  |   |                                    | 626,300   |                                    |   | 1,005,100 |   |
| Depletion                                             |   |                                    | 1,864,700 |                                    |   | 2,984,400 |   |
| Accretion                  of asset retirement obligation  |   |                                    | 16,500    |                                    |   | 49,500 |   |
| General                  and administrative expenses  |   |                                    | 41,900    |                                    |   | 91,500 |   |
| Total                  expenses                            |   |                                    | 2,549,400 |                                    |   | 4,130,500 |   |
|                                                       |   |                                    |      |                                    |   |   |   |
| **Net                  earnings**                     |   | $                                       | 1,789,700 |                                    | $      | 2,890,100 |   |
|                                                       |   |                                    |      |                                    |   |   |   |
| **Allocation                  of net earnings:**           |   |                                    |      |                                    |   |   |   |
| Managing                  general partner                  |   | $                                       | 1,119,700 |                                    | $      | 1,754,300 |   |
| Limited                  partners                          |   | $                                       | 670,000   |                                    | $      | 1,135,800 |   |
| Net                  earnings per limited partnership unit |   | $                                       | 128       |                                    | $      | 217 |   |

----

**ATLAS        AMERICA PUBLIC #15-2005 (A) L.P.**

**STATEMENT        OF PARTNERS’ CAPITAL ACCOUNTS **

**FOR        THE NINE MONTHS ENDED September 30, 2006**

**(Unaudited)**

|                                                      |   | **Managing** |       |         |   | **Accumulated**                    |   |      |      |
|-----------------------------------------------------------|--------|--------------|------------|--------------|--------|------------------------------------|--------|-----------|-----------|
|                                                      |   | **General**  |       | **Limited**  |   | **Comprehensive**                  |   |      |      |
|                                                      |   | **Partner**  |       | **Partners** |   | **Income                  (Loss)** |   | **Total** |      |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| **Balance                  at January 1, 2006**           |   | $            | 362,400    |         | $      | 52,237,300                         |   | $         | ―   |   | $ | 52,599,700 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Participation                  in revenues and expenses:  |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Net                  production revenues                  |   |         | 2,169,100  |         |   | 3,844,500                          |   |      | ―   |   |   | 6,013,600 |   |
| Interest                  income                          |   |         | 700        |         |   | 1,200                              |   |      | ―   |   |   | 1,900 |   |
| Depletion                                                 |   |         | (364,600   | )            |   | (2,619,800                         | )      |      | ―   |   |   | (2,984,400 | ) |
| Accretion                  of asset retirement obligation |   |         | (17,900    | )            |   | (31,600                            | )      |      | ―   |   |   | (49,500 | ) |
| General                  and administrative               |   |         | (33,000    | )            |   | (58,500                            | )      |      | ―   |   |   | (91,500 | ) |
| Net                  earnings                             |   |         | 1,754,300  |         |   | 1,135,800                          |   |      | ―   |   |   | 2,890,100 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Other                  comprehensive income               |   |         | ―    |         |   | ―                            |   |      | 3,689,300 |   |   | 3,689,300 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Distributions                  to partners                |   |         | (496,900   | )            |   | (880,700                           | )      |      | ―   |   |   | (1,377,600 | ) |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| MGP                  asset contributions                  |   |         | 11,156,500 |         |   | ―                            |   |      | ―   |   |   | 11,156,500 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| **Balance                  at September 30, 2006**        |   | $            | 12,776,300 |         | $      | 52,492,400                         |   | $         | 3,689,300 |   | $ | 68,958,000 |   |

----

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**STATEMENT        OF CASH FLOWS **

**(Unaudited)**

|                                                                                                                             |   | **Nine                  Months**        |       |
|----------------------------------------------------------------------------------------------------------------------------------|--------|-----------------------------------------|------------|
|                                                                                                                             |   | **Ended**                               |       |
|                                                                                                                             |   | **September                  30, 2006** |       |
| **Cash                  flows from operating activities:**                                                                       |   |                                    |       |   |
| Net                  earnings                                                                                                    |   | $                                       | 2,890,100  |   |
| Adjustments                  to reconcile net earnings to net cash used in operating                  activities:                |   |                                    |       |   |
| Depletion                                                                                                                        |   |                                    | 2,984,400  |   |
| Accretion                  of asset retirement obligation                                                                        |   |                                    | 49,500     |   |
| Increase                  in accounts receivable - affiliate                                                                     |   |                                    | (4,346,600 | ) |
| Decrease                  in current liabilities                                                                                 |   |                                    | (2,166,300 | ) |
| Net                  cash used in operating activities                                                                           |   |                                    | (588,900   | ) |
|                                                                                                                             |   |                                    |       |   |
| **Cash                  flows from financing activities:**                                                                       |   |                                    |       |   |
| Distributions                  to partners                                                                                       |   |                                    | (1,377,600 | ) |
| Net                  cash used in financing activities                                                                           |   |                                    | (1,377,600 | ) |
|                                                                                                                             |   |                                    |       |   |
| Net                  decrease in cash and cash equivalents                                                                       |   |                                    | (1,966,500 | ) |
| Cash                  and cash equivalents at beginning of period                                                                |   |                                    | 2,168,100  |   |
| Cash                  and cash equivalents at end of period                                                                      |   | $                                       | 201,600    |   |
|                                                                                                                             |   |                                    |       |   |
| **Supplemental                  schedule of non-cash investing and financing                  activities:**                      |   |                                    |       |   |
|                                                                                                                             |   |                                    |       |   |
|  Additional                Asset Contributions:                                                                             |   |                                    |       |   |
| Lease                  and tangible equipment costs included in oil and gas                  properties                          |   | $                                       | 11,156,500 |   |
|                                                                                                                             |   |                                    |       |   |
| Oil                  and Gas Properties Receivable Transfer:                                                                     |   |                                    |       |   |
|                         Intangible and tangible costs included in oil and gas properties |   | $                                       | 49,790,900 |   |
|                                                                                                                             |   |                                    |       |   |
| Asset                  retirement obligations                                                                                    |   | $                                       | 963,500    |   |

----

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        1 **
**-**
**        NATURE OF OPERATIONS**

**NOTE        2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES**

**Recently        Issued Financial Accounting Standards**

*Considering        the Effects of Prior Year Misstatements when Quantifying Misstatements in        Current Year Financial Statements*

*Fair        Value*
*Measurement*

----

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)**

**Receivables**

**Revenue        Recognition**

**Asset        Retirement Obligation**

*Accounting        for Asset Retirement Obligations*

|                                                                |   | **Three                  Months** |      | **Nine                  Months** |   |
|---------------------------------------------------------------------|--------|-----------------------------------|-----------|----------------------------------|--------|
|                                                                |   |                              |      |                             |   |   |   |
| Asset                  retirement obligation at beginning of period |   | $                                 | 1,132,400 |                             | $      | 135,900 |   |
| Liabilities                  incurred from drilling wells           |   |                              | ―   |                             |   | 963,500 |   |
| Accretion                  expense                                  |   |                              | 16,500    |                             |   | 49,500 |   |
| Total                  asset retirement obligation at end of period |   | $                                 | 1,148,900 |                             | $      | 1,148,900 |   |

**Concentration        of Credit Risk**

----

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**September        30, 2006**

**(Unaudited)**

**NOTE        2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)**

**Property        and Equipment**

| Oil                  and gas properties consist of the following at the dates                  indicated: |   | **September                  30,** |       | **December                  31,** |   |
|-----------------------------------------------------------------------------------------------------------|--------|------------------------------------|------------|-----------------------------------|--------|
|                                                                                                      |   | **2006**                           |       | **2005**                          |   |
| Capitalized                  costs of properties:                                                         |   |                               |       |                              |   |   |   |
| Proved                  properties                                                                        |   | $                                  | 1,505,800  |                              | $      | 208,200 |   |
| Wells                  and related equipment                                                              |   |                               | 62,235,000 |                              |   | 1,621,700 |   |
|                                                                                                      |   |                               | 63,740,800 |                              |   | 1,829,900 |   |
| Accumulated                  depletion                                                                    |   |                               | (2,984,400 | )                                 |   | ― |   |
|                                                                                                      |   | $                                  | 60,756,400 |                              | $      | 1,829,900 |   |

**NOTE        3 **
**-**
**        TRANSACTIONS WITH ATLAS RESOURCES, LLC AND ITS AFFILIATES**

| ·   | As                of September 30, 2006, the Partnership has funded $52,245,700 to                our MGP                for well drilling contracts of which $51,117,700 has been spent to                date on                well drilling costs and the remaining balance of $1,128,000 is shown                as                part of accounts receivable-affiliate on the Balance                Sheet. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Administrative                costs which are included in general and administrative expenses in                the                Partnership’s Statements of Operations are payable at $75 per well per                month. Administrative costs incurred for the three and nine months                ended                September 30, 2006 were $33,100 and $56,000,                respectively. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Monthly                well supervision fees which are included in production expenses in                the                Partnership’s Statements of Operations are payable at $285 per well per                month for operating and maintaining the wells. Well supervision fees                incurred for the three and nine months ended September 30, 2006 were                $125,800 and $212,700, respectively. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Transportation                fees which are included in production expenses in the Partnership’s                Statements of Operations are payable at rates ranging from $.29-$.35                per                mcf (one thousand cubic feet) to 10% of the natural gas sales price.                Transportation costs incurred for the three and nine months ended                September 30, 2006 were $420,100 and $677,800,                respectively. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Tangible                and lease costs contributed by the Managing General Partner, which                are                included within the supplemental schedule of non-cash activities                on the                Statement of Cash Flows for the nine months ended September 30, 2006,                were                $11,156,500. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**September        30, 2006**

**(Unaudited)**

**NOTE        3 **
**-**
**        TRANSACTIONS WITH ATLAS RESOURCES, LLC AND ITS AFFILIATES        (CONTINUED)**

**Comprehensive        Income**

|                                                                                                   |   | **Three                  Months**  |      | **Nine                  Months**   |   |
|--------------------------------------------------------------------------------------------------------|--------|------------------------------------|-----------|------------------------------------|--------|
|                                                                                                   |   | **Ended**                          |      | **Ended**                          |   |
|                                                                                                   |   | **September                  30,** |      | **September                  30,** |   |
|                                                                                                   |   | **2006**                           |      | **2006**                           |   |
|                                                                                                   |   |                               |      |                               |   |   |   |
| Net                  earnings                                                                          |   | $                                  | 1,789,700 |                               | $      | 2,890,100 |   |
| Other                  comprehensive income:                                                           |   |                               |      |                               |   |   |   |
| Unrealized                  holding gain on hedging contracts                                          |   |                               | 3,945,200 |                               |   | 4,090,800 |   |
| Less:                  reclassification adjustment for gains realized in net                  earnings |   |                               | (365,500  | )                                  |   | (401,500 | ) |
| Total                  other comprehensive income                                                      |   |                               | 3,579,700 |                               |   | 3,689,300 |   |
| Comprehensive                  income                                                                  |   | $                                  | 5,369,400 |                               | $      | 6,579,400 |   |

**Subordination        of Managing General Partner’s Revenue Share**

**NOTE        4 - DERIVATIVE INSTRUMENTS**

----

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**September        30, 2006**

**(Unaudited)**

**NOTE        4 - DERIVATIVE INSTRUMENTS (CONTINUED)**

| **Natural                  Gas Fixed - Price Swaps** |   |                             |      |                             |   |
|------------------------------------------------------|--------|----------------------------------|-----------|----------------------------------|--------|
|                                                 |   |                             |      |                             |   |   |   |
| **Twelve                  Month**                    |   |                             |      | **Average**                      |   | **Fair                  Value** |   |
| **Production                  Period**               |   | **Volumes**                      |      | **Fixed                  Price** |   | **Asset                  (2)** |   |
| **Ended                  September 30,**             |   | **(MMBTU)                  (1)** |      | **(per                  MMBTU)** |   | **(in                  thousands)** |   |
|                                                 |   |                             |      |                             |   |   |   |   |   |   |
| 2007                                                 |   |                             | 942,500   |                             | $      | 9.26 |   | $ | 1,875 |   |
| 2008                                                 |   |                             | 1,364,900 |                             |   | 8.75 |   |   | 927 |   |
| 2009                                                 |   |                             | 1,020,900 |                             |   | 8.65 |   |   | 733 |   |
| 2010                                                 |   |                             | 226,500   |                             |   | 8.61 |   |   | 154 |   |
|                                                 |   |                             |      |                             |   |   |   |   |   |   |
| Total                  asset                         | $      | 3,689                            |      |

| (1)   | MMBTU                represents million British Thermal Units. |
|-----------------|----------------------------------------------------------------|
| (2)   | Fair                value based on forward NYMEX natural gas prices, as                applicable. |
|-----------------|----------------------------------------------------------------------------------------------------|

|                                    |   | **September                  30, 2006** |   | **December                  31, 2005** |   |
|-----------------------------------------|--------|-----------------------------------------|--------|----------------------------------------|--------|
|                                    |   | **Book                  Value**         |   | **Fair                  Value**        |   | **Book                  Value** |   | **Fair                  Value** |   |
| Assets                                  |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Derivative                  instruments |   | $                                       | 3,882  |                                   | $      | 3,882 |   | $ | ― |   | $ | ― |   |
|                                    |   | $                                       | 3,882  |                                   | $      | 3,882 |   | $ | ― |   | $ | ― |   |
| Liabilities                             |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Derivative                  instruments |   | $                                       | (193   | )                                      | $      | (193 | ) | $ | ― |   | $ | ― |   |
|                                    |   | $                                       | 3,689  |                                   | $      | 3,689 |   | $ | ― |   | $ | ― |   |

----

**ATLAS        AMERICA PUBLIC #15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**September        30, 2006**

**(Unaudited)**

**NOTE        5 - SUBSEQUENT EVENT**

| **ITEM                  2.** | **MANAGEMENT’S                  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION** |
|------------------------------|----------------------------------------------------------------------------------------|
|                         | **OR                  PLAN OF OPERATIONS                  (UNAUDITED)**                |

**Forward-Looking        Statements**

**General**

----

**Results        of Operations**

|                                                 |   | **Three                  Months**  |   | **Nine                  Months**   |   |
|------------------------------------------------------|--------|------------------------------------|--------|------------------------------------|--------|
|                                                 |   | **Ended**                          |   | **Ended**                          |   |
|                                                 |   | **September                  30,** |   | **September                  30,** |   |
|                                                 |   | **2006**                           |   | **2006**                           |   |
| Production                  revenues (in thousands): |   |                               |   |                               |   |   |   |
| Gas                                                  |   | $                                  | 4,304  |                               | $      | 6,983 |   |
| Oil                                                  |   | $                                  | 33     |                               | $      | 36 |   |
| Total                                                |   | $                                  | 4,337  |                               | $      | 7,019 |   |
|                                                 |   |                               |   |                               |   |   |   |
| Production                  volumes:                 |   |                               |   |                               |   |   |   |
| Gas                  (mcf/day) (2)                   |   |                               | 6,019  |                               |   | 3,239 |   |
| Oil                  (bbls/day) (2)                  |   |                               | 5      |                               |   | 2 |   |
| Total                  (mcfe/day) (2)                |   |                               | 6,049  |                               |   | 3,251 |   |
|                                                 |   |                               |   |                               |   |   |   |
| Average                  sales prices:               |   |                               |   |                               |   |   |   |
| Gas                  (per mcf) (1) (2)               |   | $                                  | 7.77   |                               | $      | 7.90 |   |
| Oil                  (per bbl) (2)                   |   | $                                  | 68.83  |                               | $      | 68.55 |   |
|                                                 |   |                               |   |                               |   |   |   |
| Average                  production costs:           |   |                               |   |                               |   |   |   |
| As                  a percent of sales               |   |                               | 14     | %                                  |   | 14 | % |
| Per                  mcfe (2)                        |   | $                                  | 1.13   |                               | $      | 1.13 |   |
|                                                 |   |                               |   |                               |   |   |   |
| Depletion                  per mcfe                  |   | $                                  | 3.35   |                               | $      | 3.36 |   |

| (1)   | The                average sales price per mcf before the effects of hedging was $7.11                and                $7.44 for the three and nine months ended September 30, 2006,                respectively. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (2)   | “Mcf”                means thousand cubic feet, “mcfe” means thousand cubic feet equivalent and                “bbls” means barrels. Bbls are converted to mcfe using the ratio of six                mcfs to one bbl. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**Liquidity        and Capital Resources. **

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**Critical        Accounting Policies**

**Recently        Issued Financial Accounting Standards**

*Considering        the Effects of Prior Year Misstatements when Quantifying Misstatements in        Current Year Financial Statements*

*Fair        Value*
*Measurement*

**ITEM        3. CONTROLS AND PROCEDURES **

**Evaluation        of Disclosure Controls and Procedures**

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**PART        II.**
**OTHER        INFORMATION**

**ITEM        6. Exhibits**

**EXHIBIT        INDEX**

| **Exhibit                  No.** |   | **Description**                                                                                                                                                           |
|----------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                             |   |                                                                                                                                                                      |
| 31.1                             |   | Certification                  Pursuant to Rule 13a-14/15(d)-14                                                                                                           |
| 31.2                             |   | Certification                  Pursuant to Rule 13a-14/15(d)-14                                                                                                           |
| 32.1                             |   | Certification                  Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                  906 of                  the Sarbanes-Oxley Act of 2002 |
| 32.2                             |   | Certification                  Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                  906 of                  the Sarbanes-Oxley Act of 2002 |

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**SIGNATURES**

| Pursuant                  to the requirements of the Securities of the Exchange Act of 1934,                  the                  registrant has duly caused this |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| report                  to be signed on its behalf by the undersigned, thereunto duly                  authorized.                                                 |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Atlas                  America Public #15-2005 (A) L.P.                                                                                                            |   |   |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   | Atlas                  Resources, LLC, Managing General Partner |
|                                                                                                                                                               |   |   |
| Date:                  November 14, 2006                                                                                                                           |   | By:/s/                  Freddie M. Kotek |
|                                                                                                                                                               |   | Freddie                  M. Kotek, Chairman of the Board of Directors, Chief |
|                                                                                                                                                               |   | Executive                  Officer and President |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| In                  accordance with the Exchange Act, this report has been signed by                  the                  following persons on behalf of the      |
| registrant                  and in the capacities and on the dates indicated.                                                                                      |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Date:                  November 14, 2006                                                                                                                           |   | By:/s/                  Freddie M. Kotek |
|                                                                                                                                                               |   | Freddie                  M. Kotek, Chairman of the Board of Directors, Chief |
|                                                                                                                                                               |   | Executive                  Officer and President |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Date:                  November 14, 2006                                                                                                                           |   | By:/s/                  Nancy J. McGurk |
|                                                                                                                                                               |   | Nancy                  J. McGurk, Vice President, Chief Financial Officer and |
|                                                                                                                                                               |   | Chief                  Accounting Officer |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |

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