# Presentation: 362667

## DOE/NASA Joint Dark Energy Mission (JDEM)

- Both the National Academy “Beyond Einstein” Panel and the FY 2008 Omnibus Bill gave guidance that DOE and NASA should work together on JDEM.
- DOE, NASA and Office of Science and Technology Policy (OSTP) have been meeting regularly to lay out the plan for a mission.
- The JDEM website with our plan was made public on September 12, 2008  _[http://jdem.gsfc.nasa.gov](http://jdem.gsfc.nasa.gov/)_
- A JDEM Project Office (PO) has been established at Goddard Space Flight Center.  This Office has overall management responsibility for the mission, and will interact closely with JDEM scientists during all phases of the mission.

## Joint Dark Energy Mission (JDEM)

- Physics of the Cosmos
-      Program Scientist: **Michael Salamon**
**     **JDEM Program Executive: **Ray Taylor**
**     **JDEM Program Scientist: **Richard Griffiths**
- JDEM Project Office at GSFC**:  Kevin Grady, Acting Project Manager**
- DoE Office of Science
-      **Dennis Kovar**
**     ****Kathy Turner**

## DOE/NASA Joint Dark Energy Mission (JDEM)

- Letters Exchanged between Ed Weiler & Ray Orbach – summer 2008
- DOE and NASA agree to partner in a JDEM.
- NASA will be the lead agency for JDEM, responsible for the success of the
- overall space mission.
- JDEM will be a medium-class strategic mission with a competitively selected, PI
- led dark energy science investigation with a science payload that includes a
- wide-field telescope and appropriate focal plane instrumentation.  Cost control
- will be a central tenet of JDEM project management and mission design.
- The selected PI-led science investigation team will perform the dark energy
- science investigation.  The selected team will not provide flight hardware.
- The Government will provide the mission-level components, including launch
- services and the spacecraft bus, as well as the science payload.  DOE and NASA will
- partner in the fabrication of the instrumentation necessary to execute the dark energy
- science investigation.  Both agencies will contribute to the science operations and data
- analysis activities.

## DOE/NASA Joint Dark Energy Mission (JDEM)

-  Letters Exchanged between Ed Weiler & Ray Orbach - continued
- The specific responsibilities of each agency will be detailed in an Implementation
- Agreement that will be established after the competitive selection of the dark
- energy science investigation that defines the mission architecture.
- DOE and NASA will each contribute funding as necessary to fulfill the particular
- responsibilities each agency agrees to accept.  Each Agency will utilize its
- normal procurement rules in the construction of its contributions.
- Public release of JDEM data will occur after an appropriate period of time
- following its acquisition.
-  In consultation with DOE, NASA will investigate the possibility for international
- contributions. As the lead U.S. agency, NASA will be the principal point of contact for the
- JDEM project in negotiating and executing any international partnerships with foreign
- space agencies.
- There will be joint participation in the selection of the principal investigator-led
- dark energy science investigations, and in the construction and operations of JDEM.
- The agencies are working on a Memorandum of Understanding

## Convened by DOE and NASA in June 2008 – Chair is Rocky Kolb

The purpose of this SWG is to continue the work of the Dark Energy Task Force
in developing a quantitative measure of the power of any given experiment to
advance our knowledge about the nature of dark energy.  The measure may be
in the form of a “Figure of Merit” (FoM) or an alternative formulation.  The
findings of the SWG will be reported to the agencies and will be considered for
incorporation into NASA’s future JDEM Announcement of Opportunity (AO).

DETF did an outstanding job but with passage of time, the community
recognized that the original Figure of Merit (FoM) may no longer be optimum

Charge to the JDEM SWG – produce findings:
Update or replace the original DETF’s FoM with a new, superior measure or measures of the scientific power for advancement in our knowledge of dark energy.  This measure will presumably be a function of the accuracies that any given experiment can provide for a set of parameters associated with the dark energy equation of state.
Determine a threshold value for this measure
Attempt to minimize bias toward particular methodology or theory

9/25/08 – initial findings presented to agencies
~ mid-October – final results available

- The purpose of this SWG is to continue the work of the Dark Energy Task Force
- in developing a quantitative measure of the power of any given experiment to
- advance our knowledge about the nature of dark energy.  The measure may be
- in the form of a “Figure of Merit” (FoM) or an alternative formulation.  The
- findings of the SWG will be reported to the agencies and will be considered for
- incorporation into NASA’s future JDEM Announcement of Opportunity (AO).
- DETF did an outstanding job but with passage of time, the community
- recognized that the original Figure of Merit (FoM) may no longer be optimum
- _Charge to the JDEM SWG – produce findings:_
- Update or replace the original DETF’s FoM with a new, superior measure or measures of the scientific power for advancement in our knowledge of dark energy.  This measure will presumably be a function of the accuracies that any given experiment can provide for a set of parameters associated with the dark energy equation of state.
- Determine a threshold value for this measure
- Attempt to minimize bias toward particular methodology or theory
- 9/25/08 – initial findings presented to agencies
- ~ mid-October – final results available

- JDEM Science Working Group (SWG)

## 
9/12/08 – letters of application for the SCG solicited
9/26/08 – Science Coordination Group letters due
10/4/08 – SCG membership announced

The SCG will determine the top-level science and observational preliminary observational requirements and instrumentation capabilities for a JDEM mission using the science performance measures from the FoM SWG, incorporating at a minimum the Baryon Acoustic Oscillation (BAO), Supernovae (SN) and Weak Lensing (WL) techniques.
Evaluate science performance of an initial Reference Mission (RM) pre-conceptual design, provided by the JDEM Project Office using the BAO, SN and WL techniques and consider whether additional techniques should be included, within programmatic constraints.
In coordination with the SCG, the JDEM PO will modify the initial RM design to meet the SWG science goals, optimize the science return, consistent with programmatic constraints of mission cost, schedule, technical risk.   
The RM description will be delivered to the agencies by mid-December and will be incorporated into the JDEM AO and the science teams will propose their investigations based upon this.  
The SCG will be disbanded so that people can propose to the AO

Oct. 15-16 – first meeting
Mid-December 2008 – results delivered to agencies and SCG disbanded

- 9/12/08 – letters of application for the SCG solicited
- 9/26/08 – Science Coordination Group letters due
- 10/4/08 – SCG membership announced
- The SCG will determine the top-level science and observational preliminary observational requirements and instrumentation capabilities for a JDEM mission using the science performance measures from the FoM SWG, incorporating at a minimum the Baryon Acoustic Oscillation (BAO), Supernovae (SN) and Weak Lensing (WL) techniques.
- Evaluate science performance of an initial Reference Mission (RM) pre-conceptual design, provided by the JDEM Project Office using the BAO, SN and WL techniques and consider whether additional techniques should be included, within programmatic constraints.
- In coordination with the SCG, the JDEM PO will modify the initial RM design to meet the SWG science goals, optimize the science return, consistent with programmatic constraints of mission cost, schedule, technical risk.
- The RM description will be delivered to the agencies by mid-December and will be incorporated into the JDEM AO and the science teams will propose their investigations based upon this.
- The SCG will be disbanded so that people can propose to the AO
- Oct. 15-16 – first meeting
- Mid-December 2008 – results delivered to agencies and SCG disbanded

- JDEM Science Coordination Group (SCG)Chair:  Neil Gehrels

## JDEM – DOE info

- DOE has set up a project office at LBNL that will work within the framework of NASA’s project office and will assist with the reference mission design as needed.
- DOE project manager will be the principal point of contact with NASA’s project office and will coordinate and lead the DOE efforts.
- DOE plans to provide ~ $200M in FY08$ to the JDEM project

## JDEM Timeline

- ~ October – Letter to the Community will be released containing pertinent info about the AO selection.
- End of 2008 - NASA will release an Announcement of Opportunity (AO), jointly written with DOE, which will be an open solicitation for proposals for PI-led dark energy investigations using the JDEM facility.  A letter to the community will be released in mid-October and will provide advance information regarding the AO.
- January 2009 – Phase A starts
- 	Within the next few months, the JDEM Project Offices at DOE and NASA will develop a proposed split of the scope of work and present it to the agencies for approval.
- Summer 2009 – Selected investigations announced.  The PI’s and their collaborators will work with the JDEM Project Offices at both agencies throughout the development of the mission and will execute the dark energy science investigations after launch and commissioning.
- Launch ~ middle of the next decade.