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  = '00583861000'        / Observation ID                                 TARG_ID = '583861  '           / 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    = '2014-01-14T11:59:45' / file creation date (YYYY-MM-DDThh:mm:ss UT)   TSTART  =     411393583.858212 / Start time                                     DATE-OBS= '2014-01-14T11:59:43.9' / Start Date                                  TSTOP   =     411393586.365512 / Stop time                                      DATE-END= '2014-01-14T11:59:46.4' / Stop Date                                   UTCFINIT=            -11.51784 / UTCF at TSTART                                 TRIGGER =               583861 / Trigger Number                                 FRAMENUM=             18049654 / CCD Frame Number                               HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'IMAGE   '           / Image data                                     HDUCLAS2= 'TOTAL   '           / Total data values                              DATAMODE= 'LONGIMA '           / 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 =     2.50730001926422 / TSTOP - TSTART                                 ONTIME  =     2.50730001926422 / Time on target                                 LIVETIME=     2.50730001926422 / ONTIME multipled by DEADC                      EXPOSURE=     2.50730001926422 / Total exposure, with all known corrections     DEADC   =                   1. / Dead time correction                           INVGAIN =                    4 / Inverse gain (data were divided by this value) RAWXCTRD=     263.220581054688 / [pixel] GRB RAWX coordinates CenTRoiD          RAWYCTRD=     350.825714111328 / [pixel] GRB RAWY coordinates CenTRoiD          XRA_OBJ =     188.520401000977 / [deg] XRT RA location of GRB or Object         XDEC_OBJ=     27.9499950408936 / [deg] XRT DEC location of GRB or Object        PA_PNT  =     101.968902587891 / [deg] Roll angle from North towards East       RAWXCEN =                  263 / RAWX CENter image                              CRVAL1  =                  263 / WCS reference value                            RAWYCEN =                  351 / RAWY CENter image                              CRVAL2  =                  351 / WCS reference value                            STDVCTRD=     8.02950572967529 / STandard DeViation of CenTRoiD                 MAXSTDV =                  12. / MAX STandard DeViation of centroid             EVTCTRD =                  247 / 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 =                    3 / XRT MODE for image                             WAVEFORM=                  134 / XRT waveform                                   P1UTCC  =            -11.51784 / [s] Packet #1 UTC Correction time              P1UTCCS =                  -12 / Packet #1 UTC Correction Seconds               P1UTCCSS=                24108 / [2*10**(-5) s] Packet #1 UTC Correction SubSecoPKT1TIME=        411393589.064 / [s] ccsds PacKeT #1 TIME=PKT1SEC+PKT1SUBS*2e-5 PKT1SEC =            411393589 / ccsds PacKeT #1 SEConds                        PKT1SUBS=                 3200 / [2*10**(-5) s] ccsds PacKeT #1 SUBSeconds      DATAMISS=                    T / Expect missing data                            CHECKSUM= '9gHbEZEZ9dEaEZEY'   / HDU checksum updated 2014-01-14T11:59:49       DATASUM = '192940764'          / data unit checksum updated 2014-01-14T11:59:49 FLUXFACT=        570000015360. / Flux conversion factor                         P2UTCC  =            -11.51784 / [s] Packet #2 UTC Correction time              P2UTCCS =                  -12 / Packet #2 UTC Correction Seconds               P2UTCCSS=                24108 / [2*10**(-5) s] Packet #2 UTC Correction SubSecoPKT2TIME=      411393589.14586 / [s] ccsds PacKeT #2 TIME=PKT2SEC+PKT2SUBS*2e-5 PKT2SEC =            411393589 / ccsds PacKeT #2 SEConds                        PKT2SUBS=                 7293 / [2*10**(-5) s] ccsds PacKeT #2 SUBSeconds      END                                                                                                                                                                                                                                                                                                                                                                                                       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