SIMPLE  =                    T / file does conform to FITS standard             BITPIX  =                    8 / number of bits per data pixel                  NAXIS   =                    1 / number of data axes                            NAXIS1  =                    0 / length of data axis 1                          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 HISTORY fimgcreate 1.0b at 2018-10-30T04:10:33                                  DATE    = '2018-10-30T04:10:33' / file creation date (YYYY-MM-DDThh:mm:ss UT)   INSTRUME= 'UVOT    '                                                            TSTART  =      561754976.90508                                                  TSTOP   =      561755882.53906                                                  DATE-OBS= '2018-10-20T19:00:27'                                                 DATE-END= '2018-10-20T19:17:57'                                                 OBJECT  = 'GRB181020a'                                                          PROCVER = '3.18.03 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_15'       CALDBVER= 'b20171016_u20170922_x20180710_m20180911' / CALDB index versions used 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           UTCFINIT=    -21.7859200000000 / [s] UTCF at TSTART                             CHECKSUM= '5BQSABQP5BQPABQP'   / HDU checksum updated 2018-10-30T04:38:15       DATASUM = '         0'         / data unit checksum updated 2018-10-30T04:38:15 END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             XTENSION= 'IMAGE   '           / IMAGE extension                                BITPIX  =                   32 / number of bits per data pixel                  NAXIS   =                    2 / number of data axes                            NAXIS1  =                  160 / length of data axis 1                          NAXIS2  =                  160 / length of data axis 2                          PCOUNT  =                    0 / required keyword; must = 0                     GCOUNT  =                    1 / required keyword; must = 1                     MESGNAME= 'UVOT_GENI_IMAGE'    / Name of the message                            TELESCOP= 'SWIFT   '           / Telescope (mission) name                       INSTRUME= 'UVOTA   '           / Instrument name                                OBS_ID  = '00867987000'        / Observation ID                                 TARG_ID = '867987  '           / 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    = '2018-10-30T03:55:30' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=    -21.7859200000000 / [s] UTCF at TSTART                             TSTART  =      561754976.90508 / Start time                                     DATE-OBS= '2018-10-20T19:02:51'                                                 TSTOP   =      561755226.83964 / Stop time                                      DATE-END= '2018-10-20T19:07:01'                                                 TELAPSE =     249.934559941292 / TSTOP - TSTART                                 ONTIME  =     249.934559941292 / Sum of GTIs                                    LIVETIME=     249.934559941292 / Ontime multiplied by DEADC                     EXPOSURE=     249.934559941292 / Total exposure, with all known correction      DEADC   =                   1. / dead time correction                           EXTNAME = 'uu561754976I'       / Extension name                                 HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'IMAGE   '           / Image data                                     HDUCLAS2= 'TOTAL   '           / Total data values                              DATAMODE= 'IMAGEEVENT'         / Instrument operating mode                      EXPID   =            561754976 / uvot EXPosure ID                               FILTER  = 'U       '           / FILTER used in exposure                        DETNAM  = '1400    '           / WHEELPOS                                       RA_PNT  =       13.97972266464 / [deg] Ra Pointing                              DEC_PNT =    -47.3929630626945 / [deg] Dec Pointing                             PA_PNT  =             193.1427 / [deg] Position angle (roll)                    WINDOWX0=                  712 / Lower left hand X                              WINDOWY0=                  923 / Lower left hand Y                              WINDOWDX=                  320 / X Window width                                 WINDOWDY=                  320 / Y Window width                                 NFRAMES =                22639 / number of frames included                      GRBLOC  =                    1 / GRB Location 1=XRT 0=MODE CMD                  BPEHWIN =                    0 / BPE hardware window height                     BINX    =                    2 / Binning in the x-axis                          BINY    =                    2 / Binning in the y-axis                          CMPCNTMN=                    F / Compression losses didn't occurred in the imageCMPOTHRS=                 8191 / Overflow of lossy compression algorithm        CMPUTHRS=                -8192 / Underflow of lossy compression algorithm       CTYPE1  = 'RAWX    '           / WCS  axis type                                 CUNIT1  = 'pixel   '           / WCS axis unit                                  CRVAL1  =                712.5 / WCS reference value                            CDELT1  =                    2 / WCS coordinate increment                       CRPIX1  =                   1. / WCS Reference point                            CTYPE2  = 'RAWY    '           / WCS  axis type                                 CUNIT2  = 'pixel   '           / WCS axis unit                                  CRVAL2  =                923.5 / WCS reference value                            CDELT2  =                    2 / WCS coordinate increment                       CRPIX2  =                   1. / WCS Reference point                            UTCCTIME=            -21.78592 / [s] UTC Correction time                        UTCCSEC =                  -22 / UTC Correction Seconds                         UTCCSUBS=                10704 / [2*10**(-5) s] UTC Correction SubSeconds       PKTTIME =      561755239.57578 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5      PKTSEC  =            561755239 / ccsds PacKeT SEConds                           PKTSUBS =                28789 / [2*10**(-5) s] ccsds PacKeT SUBSeconds         APID    =                  843 / Application Process Identifier                 BLANK   =          -2147483648 / Data null value                                CHECKSUM= 'ihkfihidihidihid'   / HDU checksum updated 2018-10-30T04:38:15       DATASUM = '45154   '           / data unit checksum updated 2018-10-30T03:55:30 PROCVER = '3.18.03 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_15'       CALDBVER= 'b20171016_u20170922_x20180710_m20180911' / CALDB index versions used END                                                                                                                                                                                                                                                                                                                                                                                                       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XTENSION= 'IMAGE   '           / IMAGE extension                                BITPIX  =                   32 / number of bits per data pixel                  NAXIS   =                    2 / number of data axes                            NAXIS1  =                  160 / length of data axis 1                          NAXIS2  =                  160 / length of data axis 2                          PCOUNT  =                    0 / required keyword; must = 0                     GCOUNT  =                    1 / required keyword; must = 1                     MESGNAME= 'UVOT_GENI_IMAGE'    / Name of the message                            TELESCOP= 'SWIFT   '           / Telescope (mission) name                       INSTRUME= 'UVOTA   '           / Instrument name                                OBS_ID  = '00867987000'        / Observation ID                                 TARG_ID = '867987  '           / 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    = '2018-10-30T03:55:30' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=    -21.7859600000000 / [s] UTCF at TSTART                             TSTART  =      561755732.67106 / Start time                                     DATE-OBS= '2018-10-20T19:15:27'                                                 TSTOP   =      561755882.53906 / Stop time                                      DATE-END= '2018-10-20T19:17:57'                                                 TELAPSE =     149.868000030518 / TSTOP - TSTART                                 ONTIME  =     149.868000030518 / Sum of GTIs                                    LIVETIME=     149.868000030518 / Ontime multiplied by DEADC                     EXPOSURE=     149.868000030518 / Total exposure, with all known correction      DEADC   =                   1. / dead time correction                           EXTNAME = 'uu561755732I'       / Extension name                                 HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'IMAGE   '           / Image data                                     HDUCLAS2= 'TOTAL   '           / Total data values                              DATAMODE= 'IMAGEEVENT'         / Instrument operating mode                      EXPID   =            561755732 / uvot EXPosure ID                               FILTER  = 'U       '           / FILTER used in exposure                        DETNAM  = '1400    '           / WHEELPOS                                       RA_PNT  =     13.9792305709496 / [deg] Ra Pointing                              DEC_PNT =    -47.3928632191112 / [deg] Dec Pointing                             PA_PNT  =             193.1427 / [deg] Position angle (roll)                    WINDOWX0=                  711 / Lower left hand X                              WINDOWY0=                  922 / Lower left hand Y                              WINDOWDX=                  320 / X Window width                                 WINDOWDY=                  320 / Y Window width                                 NFRAMES =                13575 / number of frames included                      GRBLOC  =                    0 / GRB Location 1=XRT 0=MODE CMD                  BPEHWIN =                    0 / BPE hardware window height                     BINX    =                    2 / Binning in the x-axis                          BINY    =                    2 / Binning in the y-axis                          CMPCNTMN=                    F / Compression losses didn't occurred in the imageCMPOTHRS=                 8191 / Overflow of lossy compression algorithm        CMPUTHRS=                -8192 / Underflow of lossy compression algorithm       CTYPE1  = 'RAWX    '           / WCS  axis type                                 CUNIT1  = 'pixel   '           / WCS axis unit                                  CRVAL1  =                711.5 / WCS reference value                            CDELT1  =                    2 / WCS coordinate increment                       CRPIX1  =                   1. / WCS Reference point                            CTYPE2  = 'RAWY    '           / WCS  axis type                                 CUNIT2  = 'pixel   '           / WCS axis unit                                  CRVAL2  =                922.5 / WCS reference value                            CDELT2  =                    2 / WCS coordinate increment                       CRPIX2  =                   1. / WCS Reference point                            UTCCTIME=            -21.78596 / [s] UTC Correction time                        UTCCSEC =                  -22 / UTC Correction Seconds                         UTCCSUBS=                10702 / [2*10**(-5) s] UTC Correction SubSeconds       PKTTIME =      561755889.08462 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5      PKTSEC  =            561755889 / ccsds PacKeT SEConds                           PKTSUBS =                 4231 / [2*10**(-5) s] ccsds PacKeT SUBSeconds         APID    =                  843 / Application Process Identifier                 BLANK   =          -2147483648 / Data null value                                CHECKSUM= 'U9p7U9o7U9o7U9o7'   / HDU checksum updated 2018-10-30T04:38:15       DATASUM = '26817   '           / data unit checksum updated 2018-10-30T03:55:30 PROCVER = '3.18.03 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_15'       CALDBVER= 'b20171016_u20170922_x20180710_m20180911' / CALDB index versions used END