--- header unit 0: primary ---
SIMPLE = T / file does conform to FITS standard
BITPIX = 8 / number of bits per data pixel
NAXIS = 0 / number of data axes
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
TELESCOP = 'SWIFT' / Telescope (mission) name
INSTRUME = 'XRT' / Instrument name
OBS_ID = '01218968000' / Observation ID
TARG_ID = '1218968' / Target ID
SEG_NUM = '0' / Segment number
TIMESYS = 'TT' / Time system
MJDREFI = 51910. / Reference MJD Integer part
MJDREFF = 0.00074287037 / Reference MJD fractional
TIMEUNIT = 's' / Time unit for the time header keywords
TIERRELA = 1.0E-08 / [s/s] Estimated relative clock rate error
TIERABSO = 1. / [s] Estimated absolute clock offset error
TSTART = 731420882.6099 / Start time
DATE-OBS = '2024-03-06T12:28:02.6' / Start Date
TSTOP = 731421060.00848 / Stop time
DATE-END = '2024-03-06T12:31:00.0' / Stop Date
CLOCKAPP = F / If clock correction are applied (F/T)
ORIGIN = 'GSFC' / Source of FITS file
CREATOR = 'TDRSS2FITS V3.21' / Program that created this FITS file
TLM2FITS = 'V3.21' / Telemetry converter version number
DATE = '2024-03-06T12:34:05' / file creation date (YYYY-MM-DDThh:mm:ss UT)
UTCFINIT = -33.03714 / UTCF at TSTART
CHECKSUM = 'lJgQnGfNlGfNlGfN' / HDU checksum updated 2024-03-06T12:34:05
DATASUM = '         0' / data unit checksum updated 2024-03-06T12:34:05
--- header unit 1: binary table ---
XTENSION = 'BINTABLE' / binary table extension
BITPIX = 8 / 8-bit bytes
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = 18 / width of table in bytes
NAXIS2 = 100 / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 3 / number of fields in each row
TTYPE1 = 'TIME' / label for field 1
TFORM1 = '1D' / data format of field: 8-byte DOUBLE
TUNIT1 = 's' / physical unit of field
TTYPE2 = 'RATE' / label for field 2
TFORM2 = '1D' / data format of field: 8-byte DOUBLE
TUNIT2 = 'count/s' / physical unit of field
TTYPE3 = 'XRTMODE' / label for field 3
TFORM3 = '1I' / data format of field: 2-byte INTEGER
EXTNAME = 'RATE' / name of this binary table extension
MESGNAME = 'XRT_LIGHTCURVE' / Name of the message
COMMENT XRTMODE values
COMMENT 1=null 2=Short Image 3=Long Image 4=Pile-Up Photodiode
COMMENT 5=Low Rate Photodiode 6=Windowed Timing 7= Photon-Counting
COMMENT 8=RAW data 9=Bias map 10=Stop
TELESCOP = 'SWIFT' / Telescope (mission) name
INSTRUME = 'XRT' / Instrument name
OBS_ID = '01218968000' / Observation ID
TARG_ID = '1218968' / Target ID
SEG_NUM = '0' / Segment number
CREATOR = 'TDRSS2FITS V3.21' / Program that created this FITS file
ORIGIN = 'GSFC' / Source of FITS file
TLM2FITS = 'V3.21' / Telemetry converter version number
EQUINOX = 2000 / Equinox
RADECSYS = 'FK5' / Coordinates system
TIMESYS = 'TT' / Time system
MJDREFI = 51910. / Reference MJD Integer part
MJDREFF = 0.00074287037 / Reference MJD fractional
TIMEUNIT = 's' / Time unit for the time header keywords
TIERRELA = 1.0E-08 / [s/s] Estimated relative clock rate error
TIERABSO = 1. / [s] Estimated absolute clock offset error
CLOCKAPP = F / If clock correction are applied (F/T)
TIMEREF = 'LOCAL' / Time reference (barycenter/local)
TASSIGN = 'SATELLITE' / Time assigned by clock
DATE = '2024-03-06T12:34:05' / file creation date (YYYY-MM-DDThh:mm:ss UT)
TSTART = 731420882.6099 / Start time
DATE-OBS = '2024-03-06T12:28:02.6' / Start Date
TSTOP = 731421060.00848 / Stop time
DATE-END = '2024-03-06T12:31:00.0' / Stop Date
UTCFINIT = -33.03714 / UTCF at TSTART
TIMEPIXR = 0. / Bin time beginning=0.0 middle=0.5 end=1.
HDUCLASS = 'OGIP' / Format conforms to OGIP standards
HDUCLAS1 = 'LIGHTCURVE' / Time ordered data
HDUCLAS2 = 'TOTAL' / Source + background
HDUCLAS3 = 'RATE' / Data provided as rate
NUMBINS = 100 / Number of valid bins in the lightcurve
TRIGGER = 1218968 / Trigger Number
XRA_OBJ = 298.976226806641 / [deg] XRT RA location GRB or Object
XDEC_OBJ = 35.4140968322754 / [deg] XRT DEC location GRb or Object
TERMMODE = 0 / XRT termination mode
TELAPSE = 177.398579955101 / TSTOP - TSTART
ONTIME = 175.030151367188 / Time on target
LIVETIME = 175.030151367188 / Ontime multiplied by DEADC
EXPOSURE = 175.030151367188 / Total exposure, with all known correction
DEADC = 1. / dead time correction
UTCCTIME = -33.03714 / [s] UTC Correction TIME
UTCCSEC = -34 / UTC Correction Seconds
UTCCSUBS = 48143 / [2*10**(-5) s] UTC Correction SUBSeconds
PKTTIME = 731421060.14276 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5
PKTSEC = 731421060 / ccsds PacKeT SEConds
PKTSUBS = 7138 / [2*10**(-5) s] ccsds PacKeT SUBSeconds
APID = 1253 / Application Process Identifier
CHECKSUM = 'H2UTI1UQH1UQH1UQ' / HDU checksum updated 2024-03-06T12:34:05
DATASUM = '2744983681' / data unit checksum updated 2024-03-06T12:34:05