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The following timeline documents changes affecting the HRC to the CIAO software (denoted SW), calibration products in the CALDB (denoted CAL), standard data processing done in the pipeline (denoted SDP), and instrument settings (denoted INS).
| Jump to year: | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 |
| Date | HRC-I Event | HRC-S Event |
|---|
| January 21, 2009 (CALDB 4.4.1 release) |
CAL Version 8 of HRMA Effective Area released in CALDB 4.4.1 |
| September 13, 2007 (CALDB 3.4.1 release) |
CAL Version 3 of degap look-up table released in CALDB 3.4.1 | |
| May 16, 2007 (CALDB 3.4.0 release) |
CAL Version 2 of time-dependent gain correction maps released in CALDB 3.4.0 | CAL Version 9 of QE released in CALDB 3.4.0 |
| December 18, 2006 (CIAO 3.4 release) |
SW Two new tools introduced in CIAO 3.4: hrc_build_badpix, for creating an observation-specific bad pixel file for HRC data, and hrc_dtfstats, for computing deadtime statistics | |
| December 15, 2006 (CALDB 3.3.0 release) |
CAL Version 1 of time-dependent
gain correction maps released in CALDB 3.3.0 | CAL Version 1 of RMF released in CALDB 3.3.0 |
| August 9, 2006 (CALDB 3.2.3 release) |
CAL A corrected Version 1
of the high voltage gain map was installed in CALDB 3.2.3, to be used
in place of the version installed on November 16, 2005 in CALDB
3.2.0, which was discovered to be incorrect. CAL Version 2 of the degap look-up table installed in CALDB 3.2.3 |
|
| December 15, 2005 (CALDB 3.2.1 release) |
CAL Version 1 of the RMF introduced in CALDB 3.2.1 | CAL Version 8 of the QE installed in CALDB 3.2.1 |
| CAL Version 7 of HRMA Effective Area released in CALDB 3.2.1 | ||
| November 16, 2005 (CALDB 3.2.0 release) |
CAL Version 1 of the gain maps for the high voltage and current voltage settings introduced in CALDB 3.2.0 | CAL Version 2 of the degap look-up table installed in CALDB 3.2.0 |
| June 23, 2005 (CIAO 3.2.2 release) |
SW Format of degap correction in hrc_process_events changed from polynomial coefficients to a look-up table | |
| June 14, 2005 (CALDB 3.0.4 release) |
CAL Version 1 of the degap look-up table installed in CALDB 3.0.4 | CAL Version 1 of the degap look-up table installed in CALDB 3.0.4 |
| February 8, 2005 (CALDB 3.0.1 release) |
CAL Version 7 of the QE and Version 4 of the QEU installed in CALDB 3.0.1 | |
| August 11, 2004 (CALDB 2.28 release) |
CAL Version 3 of the bad pixel map installed in CALDB 2.27 | |
| July 7, 2004 (CIAO 3.1 release) |
SW Default rand_pix_size set to 0 in
hrc_process_events was: 0.5 |
|
| July 1, 2004 (CALDB 2.27 release) |
CAL Version 3 of GTI limits (for 2002/11/15-Present)
installed in CALDB 2.27 CAL Version 6 of GTI limits (for 1999/10/04-2002/11/15) installed in CALDB 2.27 CAL Version 6 of GTI limits (for Launch-1999/10/04) installed in CALDB 2.27 |
CAL Version 3 of GTI limits (for 2002/11/15-Present)
installed in CALDB 2.27 CAL Version 6 of GTI limits (for Launch-2002/11/15) installed in CALDB 2.27 |
| December 15, 2003 (CIAO 3.0.2 release) |
CAL Version 7 of mean quantum efficiency model installed in CALDB 2.25 | |
| SW Amplifier scale-factor correction in hrc_process_events
turned on by default SW New tap ringing correction algorithm installed in hrc_process_events |
||
| October 12, 2003 | INS Flight settings changed so that HRC door is no longer closed during radiation passages | |
| September 23, 2003 | CAL Version 2 of tap ringing test coefficients installed in CALDB 2.24 | CAL Version 2 of tap ringing test coefficients installed in CALDB 2.24 |
| November 29, 2002 | CAL Version 1 of GTI limits (for 2002/11/15-Present) installed in CALDB 2.19 | CAL Version 1 of GTI limits (for 2002/11/15-Present) installed in CALDB 2.19 |
| November 8, 2002 | CAL Version 1 of amplifier scale-factor correction coefficients installed in CALDB 2.18 | CAL Version 1 of amplifier scale-factor correction coefficients installed in CALDB 2.18 |
| October 1, 2002 | CAL Version 6 of mean quantum efficiency model installed in CALDB 2.17 | CAL Version 6 of mean quantum efficiency model installed in CALDB 2.17 |
| August 15, 2002 | CAL Version 4 of GTI limits (for 1999/10/04-2002/11/15)
installed in CALDB 2.16 CAL Version 4 of GTI limits (for Launch-1999/10/04) installed in CALDB 2.16 |
CAL Version 4 of GTI limits (for Launch-2002/11/15) installed in CALDB 2.16 |
| July 26, 2002 (Pipeline 6.9 release) |
SDP HRC-S bad pixels now identified and handled
correctly SDP 'HRC-SI' no longer used to indicate HRC-S imaging observations -- 'HRC-S' now used for all HRC-S observations (with or without grating) |
|
| SDP New HRC mask data product implemented to identify detector active area | ||
| June 25, 2002 | CAL Version 5 of mean quantum efficiency model installed in CALDB 2.15 | |
| April 4, 2002 | CAL Version 2 of bad pixel list installed in CALDB 2.13 | |
| February 14, 2002 | CAL Version 5 of mean quantum efficiency model installed in
CALDB 2.12 Version 3 of QE uniformity map installed in CALDB 2.12 |
|
| January 29, 2002 (Pipeline 6.6 release) |
SDP Spurious gaps in Good Time Intervals (GTIs) fixed | |
| December 26, 2001 | CAL Version 2 of bad pixel list installed in CALDB 2.11 | |
| December 12, 2001 | CAL Version 4 of mean quantum efficiency model installed in CALDB 2.10 | |
| December 5, 2001 (Pipeline 6.5 release) |
SDP If PI value is greater than 255, it is set to 255 and status bit 25 is set | |
| October 22, 2001 | CAL Version 2 of QE uniformity map installed in CALDB 2.9 | CAL Version 4 of mean quantum efficiency model installed in
CALDB 2.9 CAL Version 2 of QE uniformity map installed in CALDB 2.9 |
| June 1, 2001 | CAL Version 3 of GTI limits (for
1999/10/04-2002/11/15) installed in CALDB 2.6 CAL Version 3 of GTI limits (for Launch-1999/10/04) installed in CALDB 2.6 |
CAL Version 3 of GTI limits (for Launch-2002/11/15) installed in CALDB 2.6 |
| May 15, 2001 | CAL Version 2 of degap correction table installed in CALDB 2.5 | |
| April 24, 2001 (Pipeline 6.0 release) |
SDP Bug fix: TLMIN/TLMAX listed in FITS header for HRC-S
TDET coordinates are now correct. (They were flipped.) SDP Events with PHA = 255 now filtered out of level 2 data files |
|
| SDP Added support for high precision event timing HRC observations with vetoes disabled | ||
| March 19, 2001 | CAL Version 2 of event hyperbolic test coefficients installed in CALDB 2.4 | CAL Version 2 of event hyperbolic test coefficients installed in CALDB 2.4 |
| March 7, 2001 | CAL Version 1 of LETG/HRC-S PI region filters installed in CALDB 2.3 | |
| February 20, 2001 (Pipeline R4CU5UPD14.3 release) |
SDP Bug fix: Tools using detnam.par parameter files will now use hrc-s.par if detnam = 'HRC-SI' | |
| February 8, 2001 (Pipeline R4CU5UPD14.2 release) |
SDP Bug fixed so that CALDB queries for 'HRC-SI' (i.e. HRC-S in imaging mode) will return data for HRC-S | |
| January 25, 2001 | CAL Version 2 of degap correction table installed in CALDB 2.2 | CAL Version 1 of tap ringing test coefficients installed in CALDB 2.2 |
| December 13, 2000 (Pipeline R4CU5UPD13.1 release) |
SDP Bug fix: Update to HRC level 2 status bit filter mask now applied to secondary mode pipelines | |
| December 4, 2000 (CIAO 2.0 release) |
SW tgextract modified to accept
non-rectangular regions, i.e. the bow-tie shaped extraction region for
HRC-S/LETG data SW Bugs in celldetect which could affect HRC-S data were fixed | |
| SW hrc_process_events
CALDB-enabled SW typo in mkgarf affecting the grating ARF for HRC fixed |
||
| November 26, 2000 | CAL Version 2 of two-dimensional point spread function models installed in CALDB 2.0 | CAL Version 2 of two-dimensional point spread function models installed in CALDB 2.0 |
| November 15, 2000 | CAL Version 2 of LETG/HRC-S region filter installed in CALDB 1.8 | |
| October 23, 2000 (Pipeline R4CU5UPD11.1 release) |
SDP Event status filter modified to ignore value of status bit 12 (as had been done for bit 11 on Sept 27, 2000), and to check that the values of status bits 7 and 8 are clear | |
| October 5, 2000 | INS Default commanded event-width threshold changed to 2 was: 3 |
INS Default commanded event-width threshold changed to 2 was: 3 |
| September 27, 2000 (Pipeline R4CU5UPD10 release) |
SDP Event status filter modified to ignore values of status bits 10 and 11. (Note that bit 10 was already ignored.) | |
| August 7, 2000 (Pipeline R4CU5UPD8 release) |
SDP Bug fix: due to pixel randomization, the TLMIN/TLMAX limits recorded in
the FITS headers for the DET and SKY coordinates should be,
respectively, 0.5 pixels smaller/larger. The correct values for
are 0.5 to 32768.5 for HRC-I, and 0.5 to 65536.5 for HRC-S. SDP The following columns are now removed from the level 2 event files: CRSU, CRSV, AMP_SF, AU1, AU2, AU3, AV1, AV2, AV3, RAWX, RAWY, SUMAMPS. They remain in the level 1 event files, but are not appropriate for higher level data products. |
|
| July 31, 2000 | CAL Version 1 of event hyperbolic test coefficients
installed in CALDB 1.3 CAL Version 1 of amplifier saturation test coefficients installed in CALDB 1.3 CAL Version 1 of tap ringing test coefficients installed in CALDB 1.3 |
CAL Version 1 of event hyperbolic test coefficients installed in CALDB
1.3 CAL Version 1 of amplifier saturation test coefficients installed in CALDB 1.3 CAL Version 1 of detector gain map installed in CALDB 1.3 |
| July 26, 2000 (Pipeline R4CU5UPD7 release) |
SDP Updated analysis reference data to provide a calibration of the PI column for HRC-S data. The PI column is a mapping of the observed pulse height corrected for variation of gain across the detector. Prior to this, PI was set to 0 for all HRC data (still true for HRC-I data). | |
|
SDP Bug causing the beginning or end of a data interval to be determined
incorrectly when the HRC data mode changes between OBSERVING and
NEXT_IN_LINE in HRC level 0.5 files fixed SDP Tap ringing algorithm implemented in pipeline to correct event fine positions SDP Amplifier saturation test revised to support analysis reference data as a function of amp_sf value SDP Revised the hyperbolic test algorithm to use lower cutoff for center tap fraction SDP Corrected several keywords in FITS headers of level 0.5 files | ||
| March 26, 2000 | CAL Version 2 of GTI limits (for Launch-1999/10/04) installed
in CALDB 1.0 CAL Version 2 of GTI limits (for 1999/10/04-2002/11/15) installed in CALDB 1.0 |
CAL Version 2 of GTI limits (for Launch-2002/11/15) installed in CALDB 1.0 |
| March 6, 2000 (CIAO 1.1.1 release) |
SW mkgarf fixed so that it now works correctly for HRC-S data | |
| March 1, 2000 | CAL Version 1 of event flatness test coefficients installed in CALDB 1.0 | CAL Version 1 of event flatness test coefficients installed in CALDB 1.0 |
| December 21, 1999 | CAL Version 3 of mean quantum efficiency model installed in
CALDB 1.0 CAL Version 1 of QE uniformity map installed in CALDB 1.0 |
CAL Version 3 of mean quantum efficiency model installed in
CALDB 1.0 CAL Version 1 of QE uniformity map installed in CALDB 1.0 |
| December 16, 1999 | SW Initial CIAO release | |
| December 6, 1999 | INS Range Switch Level to step 115 was: 90 |
INS Range Switch Level to step 125 was: 90 |
| November 15, 1999 | CAL Version 1 of degap correction table installed in CALDB 1.0 | CAL Version 1 of degap correction table installed in CALDB 1.0 |
| October 21, 1999 | INS Use edge-blank with u=69-74, v=1-255 was: no-blanking |
|
| October 6, 1999 | CAL Version 1 of bad pixel list installed in CALDB 1.0 | |
| October 4, 1999 | INS MCP HV final steps lowered to Top=77, Bot=89 was: Top=79, Bot=91 |
|
| September 13, 1999 | CAL Version 1 of bad pixel list installed in CALDB 1.0 | |
| September 2, 1999 | INS Anti-coincident veto enabled was: disabled |
|
| July 23, 1999 | Chandra launched | |
 |
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Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA. Email: cxcweb@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2004. All rights reserved. |