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  = '00016257001'        / Observation ID                                 TARG_ID =                16257 / Target ID                                      SEG_NUM =                    1 / 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  =            717593544                                                  TSTOP   =          717593547.2                                                  DATE-OBS= '2023-09-28T11:32:19'                                                 DATE-END= '2023-09-28T11:32:22'                                                 ORIGIN  = 'GSFC'               / Source of FITS file                            CREATOR = 'BAT2FITS V7.21'     / Program that created this FITS file            TLM2FITS= 'V7.21'               / Telemetry converter version number            DATE    = '2023-10-08T06:45:19' / file creation date (YYYY-MM-DDThh:mm:ss UT)   PROCVER = '3.19.02 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_19'       CALDBVER= 'b20171016_u20201215_x20230725_m20230918' / CALDB index versions used SEQPNUM =                    7 / Number of times the dataset processed          OBJECT  = 'TOO (332.071, 12.286)' / Object name                                 RA_OBJ  =     332.070995271716 / [deg] R.A. Object                              DEC_OBJ =     12.2861372993693 / [deg] Dec Object                               RA_PNT  =     332.070995271716 / [deg] RA pointing                              DEC_PNT =     12.2861372993693 / [deg] Dec pointing                             PA_PNT  =     303.061709647925 / [deg] Position angle (roll)                    ATTFLAG = '110     '           / Attitude file: 100=sat, x10=pat, xx1=uat       UTCFINIT=    -32.0900200000000 / [s] UTCF at TSTART                             CHECKSUM= 'ZDRIh9Q9ZAQGf9Q9'   / HDU checksum updated 2023-10-08T06:52:39       DATASUM = '         0'         / data unit checksum updated 2023-10-08T06:52:39                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            XTENSION= 'BINTABLE'           / binary table extension                         BITPIX  =                    8 / 8-bit bytes                                    NAXIS   =                    2 / 2-dimensional binary table                     NAXIS1  =                   24 / width of table in bytes                        NAXIS2  =                    3 / 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  = 'WEIGHTED_COUNTS'    / Mask weighted counts in 4 energy bands         TFORM2  = '4J      '           / data format of field                           TUNIT2  = 'count   '           / physical unit of field                         EXTNAME = 'MASK_TAG_RATES'     / 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'              / Contains units of counts                       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  =            717593544                                                  TSTOP   =          717593547.2                                                  DATE-OBS= '2023-09-28T11:32:19'                                                 DATE-END= '2023-09-28T11:32:22'                                                 CLOCKAPP=                    F / default                                        TELAPSE =                   8. / TSTOP - TSTART                                 ONTIME  =                   8. / Time on target                                 LIVETIME=                   8. / Ontime multiplied by DEADC                     EXPOSURE=                   8. / Total exposure, with all known correction      DEADC   =                   1. / dead time correction                           TIMEPIXR= 0.0                  / Bin time beginning=0 middle=0.5 end=1          TIMEDEL =                  1.6 / [s] time resolution of data                    TELESCOP= 'SWIFT   '           / Telescope (mission) name                       INSTRUME= 'BAT     '           / Instrument name                                DATAMODE= 'MASKTAGRATE'        / Instrument operating mode                      OBS_ID  = '00016257001'        / Observation ID                                 TARG_ID =                16257 / Target ID                                      SEG_NUM =                    1 / 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    = '2023-10-08T06:45:19' / 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    =                  489 / Application Process Identifier                 CATNUM  =                10004 / BAT Source catalog number                      HISTORY Contributing ApID list                                                  HISTORY swift_head3_003f8101_2071_489.ccsds ApID(489) 194                       HISTORY CFITSIO used the following filtering expression to create this table:   HISTORY sw00016257001bmt00010004_rw.lc[1][gtifilter("sw00016257001stp.gti")]    PROCVER = '3.19.02 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_19'       CALDBVER= 'b20171016_u20201215_x20230725_m20230918' / CALDB index versions used SEQPNUM =                    7 / Number of times the dataset processed          OBJECT  = 'TOO (332.071, 12.286)' / Object name                                 RA_OBJ  =     332.070995271716 / [deg] R.A. Object                              DEC_OBJ =     12.2861372993693 / [deg] Dec Object                               RA_PNT  =     332.070995271716 / [deg] RA pointing                              DEC_PNT =     12.2861372993693 / [deg] Dec pointing                             PA_PNT  =     303.061709647925 / [deg] Position angle (roll)                    ATTFLAG = '110     '           / Attitude file: 100=sat, x10=pat, xx1=uat       UTCFINIT=    -32.0900200000000 / [s] UTCF at TSTART                             CHECKSUM= 'ZEAie90gZC7gb97g'   / HDU checksum updated 2023-10-08T06:52:39       DATASUM = '1941459318'         / data unit checksum updated 2023-10-08T06:52:39 END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             AÅbÍä*+—!þ[AÅbÍäÌÌÍ*4,ð"ŸŸAÅbÍå™™š*P*Õ!Dã