# Presentation: 874627

## SCI-ON Calibration

## SCI-on summary

|  |  | Gain
(CTI. Trail, etc.) | RMF
(line spread func.) |
| --- | --- | --- | --- |
| Normal
/Burst | FI | Obs. until Feb. 2007
OK
Obs. After Feb. 2007
Time evolution is under study. The study will be completed by Jan. 31. | Same as that for just after the launch. 
Recent data suggest an additional width of ~30eV.
RMF will be upgraded by Jan. 31. |
|  | BI | Same as FI. |  |
| 1/4 window | FI | Same as for the normal mode, but recent data suggest a slightly lower gain. | Same as for the normal mode. |
|  | BI | Same as FI. |  |

## SCI-on Charge Transfer Inefficiency (CTI)  

- The SCI makes the positional dependence of the CTI complicated. (“The saw-tooth structure”).

- Pulse Height channel

**Without CTI correction**

**With CTI correction**

- Mn I Kα from onboard cal source

- Mn I Kα from onboard cal source

**With the CTI correction, the positional dependence until 2007 Feb. is less than 5eV @ 5.9 keV**
- Positional dependence in the low energy band (~1keV) is probably OK but not checked well.
- Positional dependence after 2007 Feb. is less than 8eV@5.9keV.

- ~18eV

## SCI-on Gain

- Checked by the cal source (55Fe), Peruses cluster, IC443 and E0102.
**Inaccuracy of the energy scale until 2007 Feb. **
** ****is less than ~10eV.**

- The accuracy of energy scale after  2007 Feb. is being studied now.

- Onboard cal source Mn I Kα

- XIS0

- XIS0

- E0102 O VII Kα

## SCI-on RMF

- Current RMF is the same as that for just after the launch.
- 55Fe line in Sep. 2006 suggests an additional width of 30eV (1sigma) for all sensors.
- Now the study is going on, and  CALDB will be updated by Jan. 31.

- RMF ~ (line spread function) X (quantum efficiency)

## SCI-on 1/4 window option gain

- 55Fe line of the SCI-on window option (1/4win) shows lower gain: FI ... 10 eV, BI ... 50 eV

- XIS0

- XIS1

- 55Fe center channel

- ● full window SCI-on
- ★ 1/4 window SCI-on

- 10 eV

- 50 eV

## SCI-OFF Calibration

## SCI-off summary

|  |  | Gain
(CTI, trail etc.) | RMF
(line spread function x QE) |
| --- | --- | --- | --- |
| Normal
/Burst | FI | Obs until July, 2006
OK
Obs after July, 2006
Not good. CALDB will be upgraded by Jan. 31. | 
OK |
|  | BI | Obs until July, 2006
Gain is slightly low
Obs after July, 2006
Not good. CALDB will be upgraded by Jan. 31. | OK |
| 1/4 window | FI | Gain is slightly low. | Same as for the normal mode. |
|  | BI | Same as FI. |  |

- 2x2 data suggest lower gain than that of 5x5 or 3x3.

## SCI-off Gain

- Checked with the calibration source (55Fe; 5.9keV)
- FI : inaccuracy ~5eV until 2006/07. Afterwards gradually increased in XIS3 and rapidly decreased in XIS0 and XIS2.
- BI: systematically higher in ~10eV until 2006/07.
-    Afterwards gradually decrease.

**2006/07**

## SCI-off Resolution

- Checked with 55Fe
- Less than 170eV (FWHM) untill July 2006 for all sensors.
- Increase after July 2006  and    ~ 300eV in April 2007.

**2006/07**

## Status of SCI-off calibration

- Data observed until July 2006
- Gain of BI is slightly high.
- Gain of window option is low.
- Data observed after July 2006
-  Current calibrations are not good. This is because the CALDB values (CTI, gain etc.) are calculated by extrapolating previous trends.
- CALDB will be upgraded by Jan. 31.

## SCI-off 1/4 window gain

- 55Fe line of the SCI-off window option (1/4win) shows lower gain: FI ... 70 eV, BI ... 110 eV

## 2x2 vs 5x5

- ●5x5 – 2x2 @ 1keV
- ▲5x5 – 2x2 @ 5.9 keV

- Gain of the 2x2 data is lower.
- There is time evolution.

- Since there are few data obtained with the 2x2 mode, the calibrations about 2x2 will be upgraded after completing the calibrations for the 3x3/5x5 mode.

## Timing

## CALDB of the Timing mode

- Calibrations are still not good. The current CALDB values (gain, resolution etc.) for the timing mode are still those measured with ground experiments before the launch.

## Timing of the Timing mode

- Detect pulsation from Crab (29.7Hz) and Her X-1(0.81Hz). No significant deviation from the HXD PIN.

## Timing of the normal full window

- No significant deviation from the HXD PIN.

- 4 bursts from A1742-294

## Timing of the window mode

- Before ver 2.0
- 1/4 win ... T(HXD PIN) = T(XIS) + 6 sec
- 1/8 win ... T(HXD PIN) = T(XIS) + 7 sec
- From ver 2.0
- The deviations are corrected.

## XIS FTOOLS

- xiscontamicalc -- Calculate contaminant
- xiscoord -- Calculate coordinates
- xisexpmapgen -- Create a detector mask image and an exposure map
- xisgtigen - Write GTI for selecting data without saturation
- xispi -- Calculate PI and grade values from PHAS
- xisputpixelquality – Fill the STATUS column
- xisrmfgen -- Create the RMF
- xissimarfgen -- Calculate the ARF using the XRT ray-tracing simulator
- xissim -- Generate a simulated XIS event file using the outputs of mkphlist
- mkphlist -- Photon list generator for xissim
- xistime – Calculate event time
- xisucode -- Assign the micro-code related keywords