Cycle 15 PIMMS Effective Area Public Information
Released as of 13 DEC 2012
PIMMS effective area (EA) files are built using model observations (OBSIDs) with standpimms15.xmlard/default detector and SIM_Z configurations with the CIAO 4.5 routines mkarf for imaging aimpoint cases and mkgarf for gratings configurations, using the most current CALDB input files (CALDB 4.5.5). The following table gives the input CALDB file information used by mkarf or mkgarf to generate the respective effective area files (as ARFs) for the CY14 (N0014) and CY15 (N0015) review cycles. Plots of the PIMMS effective areas may be viewed at the PIMMS Effective Area Data page. You may also use the automated Chandra Effective Area Viewer.
PIMMS Input Data and Procedure Changes for Cycle 15:
CalDB Input File Uprades (since CY14):
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The ACIS CONTAM file which provides a better estimate of the contamination since mid-2009. At that point the contamination layer began a more rapid increase in optical depth with time. The model for 2009-2014 is linearly increasing rapidly, which results in considerably more absorption predicted for mid-2014 than the previous CONTAM version.
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The ACIS time-dependent QE Uniformity has been included in CalDB 4.5.5. The QEU degrades slightly with time due to the increasing charge-transfer inefficiency (CTI) effect. Up until the present, the degradation has been very small; however after thirteen years of operation, the change is approximately 1 percent over the life of the mission for ACIS-I, and 3% for ACIS-S3. The particular file used for CY15 is the latest one available, effective on 2010-02-01, corresponding to T_GAIN epochs 41-48.
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The HRC-S QE (quantum efficiency) has been upgraded as well to version 2012-03-18 N0012, which includes corrections for the new high-voltage settings for the HRC-S, which were changed on 2012-03-18 to recover approximately 5% of the quantum efficiency over the full energy range.
Parameter Input Changes (versus CY14 inputs):
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Imaging aimpoints: The slow optical axis drift (with respect to the Science Instrument Module (SIM)) has continued with the progress of the mission. Hence the default position for an imaging observation strikes each detector in a slightly different place. (See the changes in the CHIPX, CHIPY positions in Table 1 below.) We include default pointing Y- and Z-offsets for ACIS-I and ACIS-S, to optimize the local EA calculation for where your source is likely to appear (unless a proposer specifies a different pointing offset). The change in position presents a slightly different QE and mirror vignetting in the CIAO modeling that is done to calculate PIMMS EA's.
-
ACIS CONTAM time-delay parameter: The CIAO ARF- and GARF-generating routines employ a time-delay option in the "detsubsys" parameter specification, wherein a TT date value in seconds may be entered to set the date for the time-dependent CONTAM calculations. For Cycle 15 the value is 516499267.184, which corresponds to UTC date 15 May 2014. For Cycle 14 the value was 484963266.184, corresponding to 15 May 2013. This affects all and only ACIS configurations. For ACIS-S aimpoint position EAs and grating zeroth order EAs, the change is at most -6% at the Carbon Edge, and significantly less elsewhere.
| Configuration | (CHIPX, CHIPY) | ObsID Used | HRMA | QE | QEU | ACIS FI DEAD AREA | ACIS CONTAM | CONTAM TIME DELAY | ACIS OSIP | GREFF | CALDB Filenames |
| ACIS-I |
(967, 963) (972, 964) |
9768 | hrmaD1996-12-20axeffaN0008.fits | acisD1997-04-17qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
N/A | N/A |
acisiD2011-11-10pimmsN0014.fits
acisiD2012-11-26pimmsN0015.fits |
| ACIS-S |
(225, 516) (206, 521) |
9300 | hrmaD1996-12-20axeffaN0008.fits | acisD1997-04-17qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
N/A | N/A |
acissD2011-11-10pimmsN0014.fits
acissD2012-11-26pimmsN0015.fits |
| HRC-I |
(7646, 7852) (7615, 7862) |
8531 | hrmaD1996-12-20axeffaN0008.fits | hrciD1999-07-22qeN0008.fits | hrciD1999-07-22qeuN0002.fits | N/A | N/A | N/A | N/A | N/A |
hrciD2011-11-10pimmsN0014.fits
hrciD2012-11-26pimmsN0015.fits |
| HRC-S | (2107, 8948) (2117, 8955) |
9630 | hrmaD1996-12-20axeffaN0008.fits |
hrcsD1999-07-22qeN0011.fits hrcsD2012-03-18qeN0012.fits |
hrcsD2013-01-01qeuN0006.fits | N/A | N/A | N/A | N/A | N/A |
hrcsD2011-12-06pimmsN0014.fits
hrcsD2012-11-26pimmsN0015.fits |
| HETG0/ACIS-I |
(967, 963) (972, 964) |
9768 | hrmaD1996-12-20axeffaN0008.fits | acisD1997-04-17qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
N/A | hetgD1996-11-01greffpr001N0006.fits hetgD1996-11-01greffpr001N0007.fits |
acisihetg0D2011-11-10pimmsN0014.fits
acisihetg0D2012-11-26pimmsN0015.fits |
| HETG0/ACIS-S |
(231, 393) (212, 369) |
7280 | hrmaD1996-12-20axeffaN0008.fits | acisD2000-01-29qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
N/A | hetgD1996-11-01greffpr001N0006.fits hetgD1996-11-01greffpr001N0007.fits |
acisshetg0D2011-11-18pimmsN0014.fits
acisshetg0D2012-11-27pimmsN0015.fits |
| HEG1/ACIS-S |
(231, 393) (212, 369) |
7280 | hrmaD1996-12-20axeffaN0008.fits | acisD2000-01-29qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
acisD2000-01-29osip_ctiN0006.fits | hetgD1996-11-01greffpr001N0006.fits hetgD1996-11-01greffpr001N0007.fits |
acissheg1D2011-11-18pimmsN0014.fits
acissheg1D2012-11-27pimmsN0015.fits |
| HEGMEG1/ACIS-S |
(231, 393) (212, 369) |
7280 | hrmaD1996-12-20axeffaN0008.fits | acisD2000-01-29qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
acisD2000-01-29osip_ctiN0006.fits | hetgD1996-11-01greffpr001N0006.fits hetgD1996-11-01greffpr001N0007.fits |
acisshegmeg1D2011-11-18pimmsN0014.fits
acisshegmeg1D2012-11-27pimmsN0015.fits |
| MEG1/ACIS-S |
(231, 393) (212, 369) |
7280 | hrmaD1996-12-20axeffaN0008.fits | acisD2000-01-29qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
acisD2000-01-29osip_ctiN0006.fits | hetgD1996-11-01greffpr001N0006.fits hetgD1996-11-01greffpr001N0007.fits |
acissmeg1D2011-11-18pimmsN0014.fits
acissmeg1D2012-11-27pimmsN0015.fits |
| LETG0/ACIS-I |
(967, 963) (974, 969) |
9768 | hrmaD1996-12-20axeffaN0008.fits | acisD2000-01-29qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
acisD2000-01-29osip_ctiN0006.fits | letgD1996-11-01greffpr001N0006.fits letgD1996-11-01greffpr001N0007.fits |
acisiletg0D2011-11-10pimmsN0014.fits
acisiletg0D2012-11-26pimmsN0015.fits |
| LETG0/ACIS-S | (40, 158) | 10662 | hrmaD1996-12-20axeffaN0008.fits | acisD2000-01-29qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
acisD2000-01-29osip_ctiN0006.fits | letgD1996-11-01greffpr001N0006.fits letgD1996-11-01greffpr001N0007.fits |
acissletg0D2011-11-18pimmsN0014.fits
acissletg0D2012-11-26pimmsN0015.fits |
| LEG1/ACIS-S | (40, 158) | 10662 | hrmaD1996-12-20axeffaN0008.fits | acisD2000-01-29qeN0006.fits | acisD2000-01-29qeuN0006.fits acisD2010-02-01qeuN0007.fits |
acisD1999-09-16dead_areaN0001.fits | acisD1999-08-13contamN0006.fits acisD1999-08-13contamN0007.fits |
484963266.184 516499267.184 |
acisD2000-01-29osip_ctiN0006.fits | letgD1996-11-01greffpr001N0006.fits letgD1996-11-01greffpr001N0007.fits |
acissleg1D2011-11-18pimmsN0014.fits
acissleg1D2012-11-26pimmsN0015.fits |
| LETG0/HRC-I |
(7646, 7852) (7615, 7862) |
8531 | hrmaD1996-12-20axeffaN0008.fits | hrciD1999-07-22qeN0008.fits | hrciD1999-07-22qeuN0002.fits | N/A | N/A | N/A | N/A | letgD1996-11-01greffpr001N0006.fits letgD1996-11-01greffpr001N0007.fits |
hrciletg0D2011-11-10pimmsN0014.fits
hrciletg0D2012-11-26pimmsN0015.fits |
| LETG0/HRC-S |
(2117, 8850) (2118, 8848) |
331 | hrmaD1996-12-20axeffaN0008.fits | hrcsD1999-07-22qeN0011.fits hrcsD2012-03-18qeN0012.fits |
hrcsD2013-01-01qeuN0006.fits | N/A | N/A | N/A | N/A | letgD1996-11-01greffpr001N0006.fits letgD1996-11-01greffpr001N0007.fits |
hrcsletg0D2011-12-06pimmsN0014.fits
hrcsletg0D2012-11-27pimmsN0015.fits |
| LEG1/HRC-S |
(2117, 8850) (2118, 8848) |
331 | hrmaD1996-12-20axeffaN0008.fits | hrcsD1999-07-22qeN0011.fits hrcsD1999-03-18qeN0012.fits |
hrcsD2013-01-01qeuN0006.fits | N/A | N/A | N/A | N/A | letgD1996-11-01greffpr001N0006.fits letgD1996-11-01greffpr001N0007.fits |
hrcsleg1D2011-12-06pimmsN0014.fits
hrcsleg1D2012-11-27pimmsN0015.fits |
| LEGHI/HRC-S |
(2117, 8850) (2118, 8848) |
331 | hrmaD1996-12-20axeffaN0008.fits | hrcsD1999-07-22qeN0011.fits hrcsD1999-03-18qeN0012.fits |
hrcsD2013-01-01qeuN0006.fits | N/A | N/A | N/A | N/A | letgD1996-11-01greffpr001N0006.fits letgD1996-11-01greffpr001N0007.fits |
hrcsleghiD2011-11-10pimmsN0014.fits
hrcsleghiD2012-11-27pimmsN0015.fits |
Notes for Table 1:
None.
