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 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H TELESCOP= 'SWIFT ' / Telescope (mission) name INSTRUME= 'BAT ' / Instrument name OBS_ID = '01315630000' / Observation ID TARG_ID = 1315630 / Target ID SEG_NUM = 0 / Segment number TIMESYS = 'TT ' / time system MJDREFI = 51910 / MJD reference day 01 Jan 2001 00:00:00 MJDREFF = 0.00074287037 / MJD reference (fraction of day) 01 Jan 2001 00:CLOCKAPP= F / If clock correction are applied (F/T) TIMEUNIT= 's ' / Time unit for timing header keywords TSTART = 769400873. / Start time TSTOP = 769403167. / Stop time DATE-OBS= '2025-05-20T02:27:48' DATE-END= '2025-05-20T03:06:02' ORIGIN = 'GSFC' / Source of FITS file CREATOR = 'BAT2FITS V7.21' / Program that created this FITS file TLM2FITS= 'V7.21' / Telemetry converter version number DATE = '2025-05-30T05:48:25' / file creation date (YYYY-MM-DDThh:mm:ss UT) PROCVER = '3.20.02 ' / Processing script version SOFTVER = 'Hea_21Mar2024_V6.33.1_Swift_Rel5.8(Bld47)_30Jun2023_SDCpatch_2' CALDBVER= 'b20230607_u20240201_x20240522_m20250515' / CALDB index versions used SEQPNUM = 8 / Number of times the dataset processed OBJECT = 'GRB250520a' / Object name RA_OBJ = 282.2860833 / [deg] R.A. Object DEC_OBJ = -11.8689722 / [deg] Dec Object RA_PNT = 282.259582921709 / [deg] RA pointing DEC_PNT = -11.8387178262826 / [deg] Dec pointing PA_PNT = 73.3675159011909 / [deg] Position angle (roll) TRIGTIME= 769401772.48 / [s] MET TRIGger Time for Automatic Target ATTFLAG = '110 ' / Attitude file: 100=sat, x10=pat, xx1=uat UTCFINIT= -35.6352600000000 / [s] UTCF at TSTART CHECKSUM= 'Zm4Xem1WZm1Wdm1W' / HDU checksum updated 2025-05-30T06:14:42 DATASUM = ' 0' / data unit checksum updated 2025-05-30T06:14:42 END XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 12 / width of table in bytes NAXIS2 = 2294 / number of rows in table PCOUNT = 0 / size of special data area: GCOUNT = 1 / one data group (required keyword) TFIELDS = 2 / number of fields in each row TTYPE1 = 'TIME ' / TIME of Rates TFORM1 = '1D ' / data format of field TUNIT1 = 's ' / physical unit of field TTYPE2 = 'COUNTS ' / Array counts per 1 s bin TFORM2 = '1J ' / data format of field TUNIT2 = 'count ' / physical unit of field EXTNAME = 'RATE' / name of this binary table extension HDUCLASS= 'OGIP ' / Format conforms to OGIP standards HDUCLAS1= 'LIGHTCURVE' / Extension contains light curve data HDUCLAS2= 'TOTAL' / Total data values HDUCLAS3= 'COUNT' / Light curve is units of count TIMESYS = 'TT ' / Time system MJDREFI = 51910. / Reference MJD Integer part MJDREFF = 7.4287037E-4 / Reference MJD fractional TIMEREF = 'LOCAL ' / Time reference (barycenter/local) TASSIGN = 'SATELLITE' / Time assigned by clock TIMEUNIT= 's ' / Time unit TIERRELA= 1.0E-8 / [s/s] relative errors expressed as rate TIERABSO= 1.0 / [s] timing precision in seconds TSTART = 769400873. / Start time TSTOP = 769403167. / Stop time DATE-OBS= '2025-05-20T02:27:48' DATE-END= '2025-05-20T03:06:02' CLOCKAPP= F / default TELAPSE = 2294. / TSTOP - TSTART ONTIME = 2294. / Time on target LIVETIME= 2294. / Ontime multiplied by DEADC EXPOSURE= 2294. / Total exposure, with all known correction DEADC = 1. / dead time correction TIMEPIXR= 0.0 / Bin time beginning=0 middle=0.5 end=1 TIMEDEL = 1. / [s] time resolution of data TELESCOP= 'SWIFT ' / Telescope (mission) name INSTRUME= 'BAT ' / Instrument name DATAMODE= 'Rates_Arr_1s' / Instrument operating mode OBS_ID = '01315630000' / Observation ID TARG_ID = 1315630 / Target ID SEG_NUM = 0 / Segment number EQUINOX = 2000. / default RADECSYS= 'FK5' / default OBS_MODE= 'POINTING' / default ORIGIN = 'GSFC' / Source of FITS file CREATOR = 'BAT2FITS V7.21' / Program that created this FITS file TLM2FITS= 'V7.21' / Telemetry converter version number DATE = '2025-05-30T05:48:25' / file creation date (YYYY-MM-DDThh:mm:ss UT) BACKAPP = F / Background subtraction not applied TIMVERSN= 'OGIP/93-003' / Version of light curve format APID = 337 / Application Process Identifier HISTORY Contributing ApID list HISTORY swift_head3_14132e00_22c9_337.ccsds ApID(337) 1-1434 PROCVER = '3.20.02 ' / Processing script version SOFTVER = 'Hea_21Mar2024_V6.33.1_Swift_Rel5.8(Bld47)_30Jun2023_SDCpatch_2' CALDBVER= 'b20230607_u20240201_x20240522_m20250515' / CALDB index versions used SEQPNUM = 8 / Number of times the dataset processed OBJECT = 'GRB250520a' / Object name RA_OBJ = 282.2860833 / [deg] R.A. Object DEC_OBJ = -11.8689722 / [deg] Dec Object RA_PNT = 282.259582921709 / [deg] RA pointing DEC_PNT = -11.8387178262826 / [deg] Dec pointing PA_PNT = 73.3675159011909 / [deg] Position angle (roll) TRIGTIME= 769401772.48 / [s] MET TRIGger Time for Automatic Target ATTFLAG = '110 ' / Attitude file: 100=sat, x10=pat, xx1=uat UTCFINIT= -35.6352600000000 / [s] UTCF at TSTART CHECKSUM= 'ZLAbcJ3ZZJAabJ3Y' / HDU checksum updated 2025-05-30T06:14:42 DATASUM = '4256120600' / data unit checksum updated 2025-05-30T06:14:42 END A \kA ^_A YA Z A Z#A YA YaA Y A Z]A [3A [A VA Y
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