Mandatory Calibration File Keywords defined by the HEASARC

Calibration data to be incorporated into the HEASARC calibration database are FITS formatted files (generally images or binary tables or some combination). The following keywords need to be added to the headers of all extensions of calibration datasets meant to be part of the HEASARC Calibration Database. These keywords represent the minimum amount of information necessary in order to create a calibration index file for the given dataset.

Please see CAL/GEN/92-011, "Required and Recommended FITS keywords for Calibration Files" (available as html or pdf) for additional details.

Calibration File Keyword Description Index File Column Name

TELESCOP The name of the satellite or mission. Allowed Values are given in OGIP/93-013 TELESCOPE

INSTRUME Name of the instrument. Allowed values given in OGIP/93-013 INSTRUME

DETNAM Name of the detector. Only applicable if INSTRUME value is ambiguous. Values given in OGIP/93-013 DETNAM

FILTER Name of the filter in use, if applicable FILTER

CCLSmmmm HEASARC class of the calibration file (PCF, BCF, CPF, USR) CAL_CLAS

CDTPmmmm Distinguishes "real" (DATA) or "virtual" (TASK) calibration information CAL_DTYP

CCNMmmmm Contents Descriptor. See the CAL_CNAM Dictionary or Appendix A of CAL/GEN/92-011 for defined values. CAL_CNAM

CBDnmmmm Parameter limits for a given calibration dataset. Syntax is defined in Section B.3 of CAL/GEN/92-011 CAL_CBD

CVSDmmmm Date (UTC) after which calibration dataset can be used CAL_VSD

CVSTmmmm Time (UTC) of day on specified CVSDmmmm after which calibration dataset can be used CAL_VST

CDESmmmm Descriptive summary of calibration dataset CAL_DESC

National Aeronautics and Space Administration

Goddard Space Flight Center

Sciences and Exploration

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Mandatory Calibration File Keywords defined by the HEASARC