# Presentation: 116774

## XRT update

- Yoshitomo Maeda (ISAS/JAXA), Kai-Wing Chan (GSFC/NASA)
- and the XRT team

## Contents

- Current XRT Performance
- No significant time evolution/degradation from the launch
- Updates on software/CALDB/calibration status
- New tools: Attitude correction ftools “aeattcor”
- The cross calibration of XIS/PIN
- Speed-up and general improvement on the ray-tracing code
- A bug fix on large angle stray lights (> 5deg,)
- Plan of their future updates
- Provide a faster arf generator
- More fine ray-tracing tuning

## Attitude correction : aeattcor

- Uchiyama et al. 2008
- Ishisaki

- 96 min modulation ~ 1 orbit

- Amplitude ~ 50 arcsec

- V1.2

- Nominal position

- Distorted
- image

## Attitude correction : aeattcor

- Uchiyama et al. 2008
- Ishisaki

- V1.2

- V2.0

- Suzaku has no alignment monitor onboard.
- modeling the empirical correction using the very limited HK or orbit data.
-  The solution is included in a ftools “aeattcor”

- Aeattcor was applied

## Attitude correction : aeattcor

- Core sharpness

- Counts (< 20arcsec)
- Counts (< 10arcsec)

- Uchiyama et al. 2008
- Ishisaki

- < 50 c/exposure

- > 50 c/exposure

## Attitude correction : aeattcor

-   Distance from the nominal position

- < 55 arcsec

- < 25 arcsec

- Uchiyama et al. 2008
- Ishisaki

- (Absolute position accuracy)

## E.A.: Cross norm. (XIS/HXD)

- Crab power-law fit

- Ishida, Suzuki, Someya 2007 Suzaku memo

- XIS nominal

- HXD nominal (3.5 arcmin off)

## E.A.: Cross norm. (XIS/HXD)

- Ishida, Suzuki, Someya 2007 Suzaku memo

- XIS
- nominal

- HXD
- nominal

- Only change in XIS-0 from v1.2

## E.A.: Cross norm. (XIS/HXD)

- Ishida, Suzuki, Someya 2007 Suzaku memo

- XIS
- nominal

- HXD
- nominal

- Users, who needs accurate systematic error on the effective area,
- incorporates the Crab normalization ratio in their spectral fit

- We are providing the Crab index, normalization ratio to the users
- through the web page as a Suzaku memo.

## A current status of a fine tuning of the XRT response(Non-released test version)

- Image (PSF/EEF)
- Vignetting
- EA

- Purpose: To provide more accurate arf generator and simulator
-    (Hopefully) make users free from systematic uncertainties of the XRT response

## PSF XIS-0 

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

- Slope & Tail:
- Better modelled

## PSF XIS-1 

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

## PSF XIS-2 

- PSF XIS-2

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

## PSF XIS-3 

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

## EEF XIS-0 

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

## EEF XIS-1 

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

## EEF XIS-2 

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

## EEF XIS-3 

- SS Cyg at XISnom

- Xissim 20070716

-             Test version

## Vignetting:XIS-0

- Xissim 20070716

-            Test version

- ・Crab 2005 Fall   ・Crab 2006 Fall

- 4.5 keV

- 8.0 keV

## Vignetting:XIS-1

- Xissim 20070716

-            Test version

- ・Crab 2005 Fall   ・Crab 2006 Fall

- 4.5 keV

- 8.0 keV

## Vignetting:XIS-2

- Xissim 20070716

-            Test version

- ・Crab 2005 Fall   ・Crab 2006 Fall

- 4.5 keV

- 8.0 keV

## Vignetting:XIS-3

- Xissim 20070716

-            Test version

- ・Crab 2005 Fall   ・Crab 2006 Fall

- 4.5 keV

- 8.0 keV

## Effective Area

- Problem: Crab’ slope becomes flatter (~2.0)

- Data: Crab
- Response: Test version
- Model: =2.1

- Short solu. For FL

- Long solu. For FL

- On-Going

- Once solved, update responses to GO/SWG.

## A current status of a fine tuning of the XRT response(test version)

- A current status of a fine tuning of the XRT response(test version)

- Future updated components
- teldef
- Optical Axis
- Ray-tracing library/reference files
- Foils geometry at every QT
- Focal length, Optical Axis
- Scattering (Au surface)
- 	 Vignetting, PSF/EEF, Effective area

- finished

- On-going

- Improvement

- Release once finished

- Close to be finished

## Summary

- Continue to update XISSIM/XISSIMARFGEN beyond version 20070716
- Current Status
- Update version of xissim, xissimarfgen: all 2007-07-16 versions
- Attitude correction tool “aeattcor” was released and was incorporated in the v 2.0 processing.
- Future plan
- Release a faster version of the xissimarfgen: xisarfgen
- Improve the calibration accuracy
- Current Test Version nearly completed for
- Vignetting
- Work in progress
- Angular Resolution (PSF/EEF)
- Effective area