BATSE FITS Headers (gdt.missions.cgro.batse.headers)

This module defines all of the FITS headers for the public data files. While these classes are not usually directly called by the user, we may load one up and see the contents and default values. For example, here is the set of header definitions for triggered PHAII files:

>>> from gdt.missions.cgro.batse.headers import PhaiiTriggerHeaders
>>> hdrs = PhaiiTriggerHeaders()
>>> hdrs
<PhaiiTriggerHeaders: 3 headers>

Here is the PRIMARY header and default values (retrieved by index):

>>> hdrs[0]
TELESCOP= 'COMPTON GRO'
INSTRUME= 'BATSE   '
ORIGIN  = 'MSFC    '           / Tape writing institution
FILETYPE= ''
OBJECT  = ''
BATSE_TR=                    0 / BATSE trigger number
OBSERVER= 'G. J. FISHMAN'      / Principal investigator (256) 544-7691
STRT-DAY=                  0.0 / YYYY.DDD at start of data
STRT-TIM=                  0.0 / seconds of day at start of data
END-DAY =                  0.0 / YYYY.DDD at end of data
END-TIM =                  0.0 / seconds of day at end of data
TRIG-DAY=                  0.0 / YYYY.DDD at burst trigger
TRIG-TIM=                  0.0 / seconds of day at burst trigger
EQUINOX =               2000.0 / J2000 coordinates
SC-Z-RA =                  0.0 / Z axis RA in degrees
SC-Z-DEC=                  0.0 / Z axis Dec in degrees
SC-X-RA =                  0.0 / X axis RA in degrees
SC-X-DEC=                  0.0 / X axis Dec in degrees
OBJCTRA =                  0.0 / J2000 RA of source, degrees
OBJCTDEC=                  0.0 / J2000 DEC of source, degrees
SC-X-POS=                  0.0 / Spacecraft position at time of trigger (km)
SC-Y-POS=                  0.0
SC-Z-POS=                  0.0
SRCE-AZ =                  0.0 / Source Azimuth in GRO coords, degrees
SRCE-EL =                  0.0 / Source Elevation in GRO coords, degrees
GEOC-AZ =                  0.0 / Geocenter Azimuth in GRO coords, degrees
GEOC-EL =                  0.0 / Geocenter Elevation in GRO coords, degrees
FILE-ID = '' / Name of FITS file
FILE-VER= '' / Version of FITS file format
DATE    = '2024-01-31T19:10:14.909' / FITS file creation date (dd/mm/yy)
MNEMONIC= 'Gamma-ray Data Tools 2.0.2' / Program creating this file
PRIMTYPE= 'NONE    '           / No primary array
COMMENT FITS (Flexible Image Transport System) format defined in Astronomy and
COMMENT Astrophysics Supplement Series v44/p363, v44/p371, v73/p359, v73/p365.
COMMENT Contact the NASA Science Office of Standards and Technology for the
COMMENT FITS Definition document #100 and other FITS information.
COMMENT This file contains BATSE time-sequenced spectral data

And here is the BATSE BURST SPECTRA header and default values:

>>> hdrs['BATSE BURST SPECTRA']
EXTNAME = 'BATSE BURST SPECTRA' / name of this binary table extension
DSELECT = '' / Detectors summed in order [76543210]
LO_CHAN =                    0 / Lower channel
UP_CHAN =                    0 / Upper channel
RF_511  =                  0.0 / Resolution fraction at 511 keV (LADs)
R_EXP   =                  0.0 / Power-law exponent of resolution model (LADs)
DET_MODE= '' / LAD or SD Detectors
DATATYPE= '' / BATSE data types used
IS_SPEC =                    T / Set to T if RATES field is not empty
IS_ERROR=                    T / Set to T if ERRORS field is not empty
OVERFLW =                    F / Set to T if HER_COR or SHER_COR was used
LTIMECOR=                    T / Set to T if deadtime correction was used
BCKGSUBT=                    F / Set to T if background was subtracted
BSTACC  =                    0 / Packets in a burst readout (DISCSC,HERB,SHERB)
BASETIME=                  0.0 / Reference epoch, days past JD 2440000.5
NOTE    = 'Burst number:   {}'
NOTE    = 'Detectors:  {}'
NOTE    = 'Data types: {}'
NOTE    = 'Start day:  {}'
NOTE    = 'Start sec:  {}'
NOTE    = 'Min. Resolution (s):   {}'
NOTE    = 'Creation time: {}'
COMMENT Bad or missing data indicated by IEEE NAN in Rate errors.

See Data File Headers for more information about creating and using FITS headers.

Reference/API

gdt.missions.cgro.batse.headers Module

Classes

PhaiiContHeaders()	FITS Headers for non-trigger CONT data.
PhaiiContHeadersAlt1()	Alternate FITS headers for non-trigger CONT data.
PhaiiContHeadersAlt2()	Alternate FITS headers for non-trigger CONT data.
PhaiiDisclaHeaders()	FITS Headers for non-trigger LAD discriminator data.
PhaiiDisclaHeadersAlt1()	Alternate FITS headers for non-trigger LAD discriminator data.
PhaiiDisclaHeadersAlt2()	Alternate FITS headers for non-trigger LAD discriminator data.
PhaiiTriggerHeaders()	FITS Headers for trigger PHAII data.
PhaiiTriggerTtsHeaders()	FITS Headers for trigger TTS data.
TteTriggerHeaders()	FITS Headers for trigger TTE data.
RspHeaders()	FITS Headers for BATSE DRM files.
RspHeadersAlt()	Alternate FITS headers for BATSE DRM files.

Class Inheritance Diagram