Brief Calibration History
Table 1 gives a summary of principal changes in the ASCA calibration and dates. Details of all these can be found in the ASCA GOF calibration pages.
Table 1
Significant ASCA Calibration Milestones
Date |
Detector |
Software |
Description |
12/20/93 |
SIS |
sisrmg v0.4 |
Release of v0.4 SIS matrices e.g. s0c1g0234p40e1_512.rmf |
04/19/94 |
XRT |
ascaarf v2.02 |
Thermal shield was included twice; corrected. |
06/20/94 |
SIS |
sisrmg v0.6 |
Release of v0.6 SIS matrices e.g. s0c1g0234p40e1_512v0_6.rmf |
06/28/94 |
XRT |
ascaarf v2.30 |
Gaussian fudge in XRT effective area introduced. |
11/09/94 |
SIS |
sisrmg v0.8 |
Release of v0.8 SIS matrices s0c1g0234p40e1_512v0_8i.rmf |
- |
- |
- |
These use PI channels for the first time and include major QE change. |
09/05/95 |
XRT |
ascaarf v2.50 |
Updated XRT effective area and PSF files to v1.1 of Nagoya ray-tracing code. |
09/05/95 |
GIS |
ascaarf v2.50 |
Uses updated version of GIS response (v4.0) |
11/22/95 |
XRT |
ascaarf v2.51 |
Bug fix: Gaussian fudge was always ON. |
02/26/96 |
XRT |
ascaarf v2.53 |
Updated XRT effective area and PSF files to v2.0 of Nagoya ray-tracing code. |
02/29/96 |
SIS |
sispi |
PH2PI file sisph2pi_290296.fits released. |
04/10/96 |
XRT |
ascaarf v2.60 |
arffilter fudge to XRT effective area added. |
05/06/96 |
XRT |
ascaarf v2.61 |
Slight changes to relative norms of arffilter fudges. |
July 1996 |
XRT |
ascaarf v2.62 |
OFFICIAL release of XRT v2.0 EA and PSF files. |
03/11/97 |
SIS |
sispi |
PH2PI file sisph2pi_110397.fits released. |
April 1997 |
SIS |
sisrmg v1.1 |
No major changes to sisrmg after v1.1, until 2001. |
- |
- |
- |
Various changes since v0.8, including RDD model, updated |
- |
- |
- |
echo corrections, non-uniform CTI, updated event threshold |
- |
- |
- |
handling. Click here for more details. |
We identify three major phases of calibration characterized by the differences which have the most significant effects on model parameters derived from fitting data. All other changes in calibration have much less effect than these. The three phases are as follows.
Next: Effects on Power-Law Slope and Absorbing Column
Back: "Effects of Calibration Changes" Main Page
This file was last modified on Tuesday, 12-Oct-2021 11:22:04 EDT
Curator:
HEASARC Guest Observer Facility
If you have any questions concerning ASCA, visit our Feedback form.