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Last modified: 15 December 2011

URL: http://cxc.harvard.edu/caldb/prop_plan/pimms/pimms14.html

Cycle 14 PIMMS Effective Area Public Information

Return to: PIMMS Index

Released as of 15 DEC 2011



PIMMS effective area (EA) files are built using model observations (OBSIDs) with standard/default detector and SIM_Z configurations with the CIAO 4.4 routines mkarf for imaging aimpoint cases and mkgarf for gratings configurations, using the most current CALDB input files (CALDB 4.4.7). 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 CY13 (N0013) and CY14 (N0014) 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 14:

CalDB Input File Uprades (since CY13):

  1. The HETG GREFF (grating efficiency) for the +/- first orders has been modified to correct the HEG-MEG cross calibration in CalDB patch version 4.4.6.1 (01 Dec 2011). These corrections are split between the HEG and MEG such that the MEG-LEG cross calibration is not changed. The corrections in the MEG are in the energy range above 1 keV, and are at the 10% level or less. The remaining corrections are are applied the HEG GREFF.

  2. The HRC-S QE (quantum efficiency) has been upgraded as well to version N0011, so there will be some measurable change in the four HRC-S configuration effective area spectra, as is shown in the plots on the PIMMS index page and the effective area viewer.

  3. The HRC-S QEU (quantum efficiency uniformity) was upgraded to a set of annually time-displaced QEU files (all version N0006) which takes into account the time-variablity of the QE across the array. This affects the AIMPOINT HRC-S EA, and the three LETG/HRC-S PIMMS EAs (zeroth order, first order, and higher orders summed.)
  4. The LETG GREFF (grating efficiency) for orders 2-7 has been upgraded yet again since the last cycle. The orders 2 through 7 greff values have been reduced by 1 to 9% relative to their previous values, which has affected the LETG/HRC-S Higher Order summed efficiencies ("LETGHI" in PIMMS.)

Parameter Input Changes (versus CY13 inputs):

  1. 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.

  2. 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 14 the value is 484963266.184, which corresponds to UTC date 15 May 2013. For Cycle 13 the value was 453427266.184, corresponding to 15 May 2012. 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.


TABLE 1

Configuration (CHIPX, CHIPY) ObsID Used HRMA QE QEU ACIS FI DEAD AREA ACIS CONTAM CONTAM TIME DELAY ACIS OSIP GREFF CALDB Filenames
ACIS-I (976, 983)
(967, 963)
9768 hrmaD1996-12-20axeffaN0008.fits acisD1997-04-17qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
N/A N/A acisiD2010-11-23pimmsN0013.fits
acisiD2011-11-10pimmsN0014.fits
ACIS-S (209, 521)
(225, 516)
9300 hrmaD1996-12-20axeffaN0008.fits acisD1997-04-17qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
N/A N/A acissD2010-11-23pimmsN0013.fits
acissD2011-11-10pimmsN0014.fits
HRC-I (7632, 7798)
(7646, 7852)
8531 hrmaD1996-12-20axeffaN0008.fits hrciD1999-07-22qeN0008.fits hrciD1999-07-22qeuN0002.fits N/A N/A N/A N/A N/A hrciD2010-11-23pimmsN0013.fits
hrciD2011-11-10pimmsN0014.fits
HRC-S (2107, 8948)
(2117, 8955)
9630 hrmaD1996-12-20axeffaN0008.fits hrcsD1999-07-22qeN0010.fits
hrcsD1999-07-22qeN0011.fits
hrcsD1999-07-22qeuN0005.fits
hrcsD2013-01-01qeuN0006.fits
N/A N/A N/A N/A N/A hrcsD2010-11-23pimmsN0013.fits
hrcsD2011-12-06pimmsN0014.fits
HETG0/ACIS-I (976, 959)
(967, 963)
9768 hrmaD1996-12-20axeffaN0008.fits acisD1997-04-17qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
N/A hetgD1996-11-01greffpr001N0006.fits
hetgD1996-11-01greffpr001N0007.fits
acisihetg0D2010-11-23pimmsN0013.fits
acisihetg0D2011-11-10pimmsN0014.fits
HETG0/ACIS-S (231, 393) 7280 hrmaD1996-12-20axeffaN0008.fits acisD2000-01-29qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
N/A hetgD1996-11-01greffpr001N0006.fits
hetgD1996-11-01greffpr001N0007.fits
acisshetg0D2010-11-23pimmsN0013.fits
acisshetg0D2011-11-18pimmsN0014.fits
HEG1/ACIS-S (231, 393) 7280 hrmaD1996-12-20axeffaN0008.fits acisD2000-01-29qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
acisD2000-01-29osip_ctiN0006.fits hetgD1996-11-01greffpr001N0006.fits
hetgD1996-11-01greffpr001N0007.fits
acissheg1D2010-11-23pimmsN0013.fits
acissheg1D2011-11-18pimmsN0014.fits
HEGMEG1/ACIS-S (231, 393) 7280 hrmaD1996-12-20axeffaN0008.fits acisD2000-01-29qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
acisD2000-01-29osip_ctiN0006.fits hetgD1996-11-01greffpr001N0006.fits
hetgD1996-11-01greffpr001N0007.fits
acisshegmeg1D2010-11-23pimmsN0013.fits
acisshegmeg1D2011-11-18pimmsN0014.fits
MEG1/ACIS-S (231, 393) 7280 hrmaD1996-12-20axeffaN0008.fits acisD2000-01-29qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
acisD2000-01-29osip_ctiN0006.fits hetgD1996-11-01greffpr001N0006.fits
hetgD1996-11-01greffpr001N0007.fits
acissmeg1D2010-11-23pimmsN0013.fits
acissmeg1D2011-11-18pimmsN0014.fits
LETG0/ACIS-I (967, 963)
(974, 969)
9768 hrmaD1996-12-20axeffaN0008.fits acisD2000-01-29qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
acisD2000-01-29osip_ctiN0006.fits letgD1996-11-01greffpr001N0006.fits
letgD1996-11-01greffpr001N0007.fits
acisiletg0D2010-11-23pimmsN0013.fits
acisiletg0D2011-11-10pimmsN0014.fits
LETG0/ACIS-S (40, 158) 10662 hrmaD1996-12-20axeffaN0008.fits acisD2000-01-29qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
acisD2000-01-29osip_ctiN0006.fits letgD1996-11-01greffpr001N0006.fits
letgD1996-11-01greffpr001N0007.fits
acissletg0D2010-11-23pimmsN0013.fits
acissletg0D2011-11-18pimmsN0014.fits
LEG1/ACIS-S (40, 158) 10662 hrmaD1996-12-20axeffaN0008.fits acisD2000-01-29qeN0006.fits acisD2000-01-29qeuN0006.fits acisD1999-09-16dead_areaN0001.fits acisD1999-08-13contamN0006.fits 453427266.184
484963266.184
acisD2000-01-29osip_ctiN0006.fits letgD1996-11-01greffpr001N0006.fits
letgD1996-11-01greffpr001N0007.fits
acissleg1D2010-11-23pimmsN0013.fits
acissleg1D2011-11-18pimmsN0014.fits
LETG0/HRC-I (7632, 7798)
(7646, 7852)
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
hrciletg0D2010-11-23pimmsN0013.fits
hrciletg0D2011-11-10pimmsN0014.fits
LETG0/HRC-S  (2106, 8843)
(2117, 8850)
331 hrmaD1996-12-20axeffaN0008.fits hrcsD1999-07-22qeN0010.fits
hrcsD1999-07-22qeN0011.fits
hrcsD1999-07-22qeuN0005.fits
hrcsD2013-01-01qeuN0006.fits
N/A N/A N/A N/A letgD1996-11-01greffpr001N0006.fits
letgD1996-11-01greffpr001N0007.fits
hrcsletg0D2010-11-23pimmsN0013.fits
hrcsletg0D2011-12-06pimmsN0014.fits
LEG1/HRC-S  (2106, 8843)
(2117, 8850)
331 hrmaD1996-12-20axeffaN0008.fits hrcsD1999-07-22qeN0010.fits
hrcsD1999-07-22qeN0011.fits
hrcsD1999-07-22qeuN0005.fits
hrcsD2013-01-01qeuN0006.fits
N/A N/A N/A N/A letgD1996-11-01greffpr001N0006.fits
letgD1996-11-01greffpr001N0007.fits
hrcsleg1D2010-11-23pimmsN0013.fits
hrcsleg1D2011-12-06pimmsN0014.fits
LEGHI/HRC-S  (2106, 8843)
(2117, 8850)
331 hrmaD1996-12-20axeffaN0008.fits hrcsD1999-07-22qeN0010.fits
hrcsD1999-07-22qeN0011.fits
hrcsD1999-07-22qeuN0005.fits
hrcsD2013-01-01qeuN0006.fits
N/A N/A N/A N/A letgD1996-11-01greffpr001N0006.fits
letgD1996-11-01greffpr001N0007.fits
hrcsleghiD2010-11-23pimmsN0013.fits
hrcsleghiD2011-11-10pimmsN0014.fits

Notes for Table 1:

None.

Return to: PIMMS Index


Last modified: 15 December 2011
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