SIMPLE = T / file does conform to FITS standard BITPIX = 16 / number of bits per data pixel NAXIS = 2 / number of data axes NAXIS1 = 51 / length of data axis 1 NAXIS2 = 51 / length of data axis 2 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 MESGNAME= 'XRT_IMAGE' / Name of the message KEYMISS = T / Expect missing keywords TELESCOP= 'SWIFT ' / Telescope (mission) name INSTRUME= 'XRT ' / Instrument name OBS_ID = '01217731000' / Observation ID TARG_ID = '1217731 ' / 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 = '2024-02-27T05:16:54' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 730702803.000012 / Start time DATE-OBS= '2024-02-27T05:00:03.0' / Start Date TSTOP = 730702803.100012 / Stop time DATE-END= '2024-02-27T05:00:03.1' / Stop Date UTCFINIT= -32.98794 / UTCF at TSTART TRIGGER = 1217731 / Trigger Number FRAMENUM= 96694817 / CCD Frame Number HDUCLASS= 'OGIP ' / Format conforms to OGIP standards HDUCLAS1= 'IMAGE ' / Image data HDUCLAS2= 'TOTAL ' / Total data values DATAMODE= 'SHORTIMA' / XRT Mode for this data CTYPE1 = 'RAWX ' / WCS axis type CRPIX1 = 26 / WCS Reference point CDELT1 = 1 / WCS coordinate increment CUNIT1 = 'pixel ' / WCS axis unit CTYPE2 = 'RAWY ' / WCS axis type CRPIX2 = 26 / WCS Reference point CDELT2 = 1 / WCS coordinate increment CUNIT2 = 'pixel ' / WCS axis unit APID = 1250 / Application Process Identifier PACKET1 = T / Data from packet #1 present PACKET2 = T / Data from packet #2 present PACKET3 = F / Data from packet #3 present BLANK = -1 / Null data TELAPSE = 0.0999999046325684 / TSTOP - TSTART ONTIME = 0.0999999046325684 / Time on target LIVETIME= 0.0999999046325684 / ONTIME multipled by DEADC EXPOSURE= 0.0999999046325684 / Total exposure, with all known corrections DEADC = 1. / Dead time correction INVGAIN = 4 / Inverse gain (data were divided by this value) RAWXCTRD= 268.122131347656 / [pixel] GRB RAWX coordinates CenTRoiD RAWYCTRD= 312.893005371094 / [pixel] GRB RAWY coordinates CenTRoiD XRA_OBJ = 245.60612487793 / [deg] XRT RA location of GRB or Object XDEC_OBJ= -15.6682481765747 / [deg] XRT DEC location of GRB or Object PA_PNT = 99.3460311889648 / [deg] Roll angle from North towards East RAWXCEN = 268 / RAWX CENter image CRVAL1 = 268 / WCS reference value RAWYCEN = 313 / RAWY CENter image CRVAL2 = 313 / WCS reference value STDVCTRD= 6.93898868560791 / STandard DeViation of CenTRoiD MAXSTDV = 12. / MAX STandard DeViation of centroid EVTCTRD = 241 / no. of EVenTs in the CenTRoiD window MINEVENT= 20 / MInimum No. of EVenTs required for centroid P2ITER = 2 / Number of iterations for phase2 algorithm MAXITER = 4 / MAX ITERation for phase2 algorithm CONVDIST= 0. / actual CONVergence DISTance MAXCONV = 0.0625 / MAX CONVergence distance XRTMODE = 2 / XRT MODE for image WAVEFORM= 134 / XRT waveform P1UTCC = -32.98794 / [s] Packet #1 UTC Correction time P1UTCCS = -33 / Packet #1 UTC Correction Seconds P1UTCCSS= 603 / [2*10**(-5) s] Packet #1 UTC Correction SubSecoPKT1TIME= 730702805.94194 / [s] ccsds PacKeT #1 TIME=PKT1SEC+PKT1SUBS*2e-5 PKT1SEC = 730702805 / ccsds PacKeT #1 SEConds PKT1SUBS= 47097 / [2*10**(-5) s] ccsds PacKeT #1 SUBSeconds DATAMISS= T / Expect missing data CHECKSUM= 'S4cXS1cWS1cWS1cW' / HDU checksum updated 2024-02-27T05:16:55 DATASUM = '194775232' / data unit checksum updated 2024-02-27T05:16:55 FLUXFACT= 9.05238807953832E-43 / Flux conversion factor P2UTCC = -32.98794 / [s] Packet #2 UTC Correction time P2UTCCS = -33 / Packet #2 UTC Correction Seconds P2UTCCSS= 603 / [2*10**(-5) s] Packet #2 UTC Correction SubSecoPKT2TIME= 730702806.06164 / [s] ccsds PacKeT #2 TIME=PKT2SEC+PKT2SUBS*2e-5 PKT2SEC = 730702806 / ccsds PacKeT #2 SEConds PKT2SUBS= 3082 / [2*10**(-5) s] ccsds PacKeT #2 SUBSeconds END $ 9;K8 -|┘V CЬrNCЖв@▐2A@ё=А