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 = '01321323000' / Observation ID TARG_ID = '1321323 ' / 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:TIMEUNIT= 's ' / Time unit for timing header keywords TIERRELA= 1.0E-08 / [s/s] Estimated relative clock rate error TIERABSO= 1. / [s] Estimated absolute clock offset error TSTART = 770842487.79482 / Start time DATE-OBS= '2025-06-05T18:51:41' TSTOP = 770842593.40592 / Stop time DATE-END= '2025-06-05T18:56:28' CLOCKAPP= F / If clock correction are applied (F/T) ORIGIN = 'GSFC ' / Source of FITS file CREATOR = 'TDRSS2FITS V3.22' / Program that created this FITS file TLM2FITS= 'V3.22 ' / Telemetry converter version number DATE = '2025-06-15T02:35:00' / file creation date (YYYY-MM-DDThh:mm:ss UT) UTCFINIT= -35.7336400000000 / [s] UTCF at TSTART CHECKSUM= 'kl92mi80ki80ki80' / HDU checksum updated 2025-06-15T02:43:42 DATASUM = ' 0' / data unit checksum updated 2025-06-15T02:35:00 OBJECT = 'GRB250605a' XOBS_ID = 01321323000 / Generating sequence 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 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 = '01321323000' / Observation ID TARG_ID = '1321323 ' / Target ID SEG_NUM = '0 ' / Segment number CREATOR = 'TDRSS2FITS V3.22' / Program that created this FITS file ORIGIN = 'GSFC ' / Source of FITS file TLM2FITS= 'V3.22 ' / 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-8 / [s/s] relative errors expressed as rate TIERABSO= 1.0 / [s] timing precision in seconds CLOCKAPP= F / If clock correction are applied (F/T) TIMEREF = 'LOCAL ' / Time reference (barycenter/local) TASSIGN = 'SATELLITE' / Time assigned by clock DATE = '2025-06-15T02:35:00' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 770842487.79482 / Start time DATE-OBS= '2025-06-05T18:54:42' TSTOP = 770842593.40592 / Stop time DATE-END= '2025-06-05T18:56:28' UTCFINIT= -35.7336400000000 / [s] 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 = 1321323 / Trigger Number XRA_OBJ = 166.98420715332 / [deg] XRT RA location GRB or Object XDEC_OBJ= -19.8017539978027 / [deg] XRT DEC location GRb or Object TERMMODE= 0 / XRT termination mode TELAPSE = 105.611100077629 / TSTOP - TSTART ONTIME = 107.359703063965 / Time on target LIVETIME= 107.359703063965 / Ontime multiplied by DEADC EXPOSURE= 107.359703063965 / Total exposure, with all known correction DEADC = 1. / dead time correction UTCCTIME= -35.73364 / [s] UTC Correction TIME UTCCSEC = -36 / UTC Correction Seconds UTCCSUBS= 13318 / [2*10**(-5) s] UTC Correction SUBSeconds PKTTIME = 770842593.44666 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5 PKTSEC = 770842593 / ccsds PacKeT SEConds PKTSUBS = 22333 / [2*10**(-5) s] ccsds PacKeT SUBSeconds APID = 1253 / Application Process Identifier CHECKSUM= 'NjIaQjGRNjGXNjGX' / HDU checksum updated 2025-06-15T02:43:42 DATASUM = '3617332099' / data unit checksum updated 2025-06-15T02:35:00 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 END A弩ApAec@A[@ͣAv@|C AI@}F% AF @yA@v{A@yA"/@w>YA5@wzMA3ud@uA@tAD@umA^@tAV!@sAޤ@tAgH@s.A@s4(Ax@k*A2@pAƉԕ@o@Axl@l7 AǛ@s%+A#@i,AȬaR@fhA5@mF% AɽX@lVU AFK@iA@lI AW?@b&^A4n@apAhם@gbA{t@dAz@d}A+@`(ĠA΋dZ@] A1@arAϜ`@eA%M@ajAЭ@^5 A6F@`Aѿ7v@a6AGڥ@`A}@] AY!@c4(A3@ZAjgb@\I A @\= A{@YAP@ZA֌@WDAN@X[ Aמ:~@YA&ݭ@RLAد@T_A8$ @YAƓ@ZAIjj@ZA @V?AZ@PdAS@UAk@X,AV@RDXA}=@M A@^ Aގ<@T#A&l@R@AߟC@P(ĠA(mr@O١@A@VtA9)@RLAVX@O١@AJ/@VhAӝ^@] 1 A\?@HA@SAmD@Q|A*@J:A~K@QAo@FA@B@A1@LI AZ@M 1 A)@LaA貟@CA;B@J:A@@ܠAL@B@A,|@= A]ϫ@B@Ar@ApAo @BDXA9@M 1 A\h@FA@BDXA@ATAE@ApA%@FA+T@E