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= 'XRT ' / Instrument name OBS_ID = '01519536000' / Observation ID TARG_ID = '1519536 ' / 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 = 813946030.3932 / Start time DATE-OBS= '2026-10-17T16:07:10.4' / Start Date TSTOP = 813946148.78046 / Stop time DATE-END= '2026-10-17T16:09:08.8' / 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 = '2026-10-17T16:08:36' / file creation date (YYYY-MM-DDThh:mm:ss UT) UTCFINIT= -38.6489 / UTCF at TSTART CHECKSUM= 'cDjKcBgKcBgKcBgK' / HDU checksum updated 2026-10-17T16:08:36 DATASUM = ' 0' / data unit checksum updated 2026-10-17T16:08:36 END 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 = '01519536000' / Observation ID TARG_ID = '1519536 ' / 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 = '2026-10-17T16:08:36' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 813946030.3932 / Start time DATE-OBS= '2026-10-17T16:07:10.4' / Start Date TSTOP = 813946148.78046 / Stop time DATE-END= '2026-10-17T16:09:08.8' / Stop Date UTCFINIT= -38.6489 / 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 = 1519536 / Trigger Number XRA_OBJ = 139.895538330078 / [deg] XRT RA location GRB or Object XDEC_OBJ= 12.6440649032593 / [deg] XRT DEC location GRb or Object TERMMODE= 0 / XRT termination mode TELAPSE = 118.387259960175 / TSTOP - TSTART ONTIME = 115.998481750488 / Time on target LIVETIME= 115.998481750488 / Ontime multiplied by DEADC EXPOSURE= 115.998481750488 / Total exposure, with all known correction DEADC = 1. / dead time correction UTCCTIME= -38.6489 / [s] UTC Correction TIME UTCCSEC = -39 / UTC Correction Seconds UTCCSUBS= 17555 / [2*10**(-5) s] UTC Correction SUBSeconds PKTTIME = 813946148.86236 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5 PKTSEC = 813946148 / ccsds PacKeT SEConds PKTSUBS = 43118 / [2*10**(-5) s] ccsds PacKeT SUBSeconds APID = 1253 / Application Process Identifier CHECKSUM= 'DKW4GKV1DKV1DKV1' / HDU checksum updated 2026-10-17T16:08:36 DATASUM = '4100429424' / data unit checksum updated 2026-10-17T16:08:36 END AAW2TaAAWi+AAWF@ltO AAX77v@bbRAAXڥ@^ AAYH}@`ܠAAY!@[yAAZY3@\aAAZf@] AA[k @b&^AA[@YAA\|O@aAA]@UAA]@\I AA^9.@SpAA^۶@UAA_'~@VhAA_"@WkPAA`8Ĝ@O١@AA`g@UAAaJ @M AAaҭ@UAAb[P@R@AAb@VhAAcl@QAAc:?@Oa@AAd}n@PܠAAe@M 1 AAe#%@RLAAfT@GkPAAfi@VtAAg) @PܠAAg:@B@AAh:Ri@C4(AAh@FhAAiK @PdAAi;O@CAAj\@M AAj@FAAkn$5@QAAke@eǤAAli@K*AAm @EAAmK@QAAnT"@M 1 AAn@G8AAo*@BDXAAo=@;*AAp;ߏ@LaAApĂ@CAAqM%@P(ĠAAqu@EAAr^k@ATAAr@TAAso@DAAsT@N AAt@&{AAu @IAAu=q@ApAAv@BDXAAv@DAAw,&W@IAAwɆ@= AAx=l@WDAAx@ApAAyN@8[ AAyVC@K*AAz_r@Z:AAz@\aAA{q?)@B@AA{X@IJAA|@- AA} (@*:AA}>@3AA~nn@:AA~@/١@AA-$@/١@AAWT@{AA>@> AAǝ @*:AAP@:@= AA@:AAa@{AA) @  AArO@@AAn@ AAꄄ@2@AA @7kPAAꅕXd@  AA@- AAꆦ@= 1 AA/AJ@D#AAꇷz@LaAA@? AA@CWAA!t@BXAAaQ@BɀAAꎢ@CWAAb@BɀAA$@BX