HEASARC FITS File Format Recommendations
This page contains links to documents that define the recommended
FITS formats for various types of data files used within
High Energy Astrophysics. The first section lists the higher-level
definition documents, and the second sections lists the 15 specific
recommendations that were approved by the
HEASARC FITS Working Group.
I. General HEASARC FITS Documents
II. Specific HEASARC Recommendations
The following 15 specific recommendations were formally approved by the
HEASARC FITS Working Group from 1993 through 1995.
using underscores rather than hyphens in FITS keywords and column names
RA and Dec keywords
for giving the position of the observed object, the telescope pointing, and the spacecraft axes
CATIDn FITS keywords to contain source catalog identifications
Specifying physical units in FITS files.
This recommendation is contained in OGIP memo ogip_93_001
A slightly earlier version of this memo was published in
Legacy 4, 57 (1994).
R6: On using the
TLMINn, TLMAXn, TDMINn and TDMAXn keywords
to record the the minimum and maximum values within columns of FITS tables
to denote the name and version of the software program that generated that FITS file/extension
to provide a hierarchial classification scheme for the various types of FITS extensions
Also available is a
list of all HDUCLASn/HDUVERS values currently defined by the HFWG.
Quality flags with a value
of zero should be reserved to indicate GOOD (not rejected) quality data.
Non-zero quality flag values may be used to indicate varying degrees of 'badness'.
R10: Keywords to define
channel & energy boundaries
R11: Keywords and definitions relating to
R12: Standard strings to denote the
mission, instrument and filters
within X- and gamma-ray astronomy.
This recommendation is contained in OGIP memo ogip_93_013
Long string keyword convention
- a keyword for specifying the sort order of a FITS Table
R15: Recommendations for
naming columns in a FITS table
Last Update: Tuesday, 05-Jan-2021 22:51:01 EST
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Last modified: Tuesday, 05-Jan-2021 22:51:01 EST