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 2007-04-03T00:02:05                                  DATE    = '2007-04-03T00:02:05' / file creation date (YYYY-MM-DDThh:mm:ss UT)   INSTRUME= 'XRT     '                                                            TSTART  =     167887437.805592                                                  TSTOP   =     167887440.312892                                                  DATE-OBS= '2006-04-28T03:22:46'                                                 DATE-END= '2006-04-28T03:23:59'                                                 OBJECT  = 'GRB060428a'                                                          PROCVER = '3.9.10  '           / Processing script version                      SOFTVER = 'Hea_06Dec2006_V6.1.2_Swift_Rel2.6(Bld20)patched3_14Mar2007' / HEASOFTCALDBVER= 'b20061014_u20061116_x20061219_m20070104' / 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           ATTFLAG =                  100 / Orgin of attitude information                  UTCFINIT=    -1.15958000000000 / [s] UTCF at TSTART                             CHECKSUM= '7IAH8F5E7FAE7F5E'   / HDU checksum updated 2007-04-03T00:43:26       DATASUM = '         0'         / data unit checksum updated 2007-04-03T00:43:26 END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             XTENSION= 'IMAGE   '           / IMAGE extension                                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                          PCOUNT  =                    0 / number of random group parameters              GCOUNT  =                    1 / number of random groups                        MESGNAME= 'XRT_IMAGE'          / Name of the message                            TELESCOP= 'SWIFT   '           / Telescope (mission) name                       INSTRUME= 'XRT     '           / Instrument name                                OBS_ID  = '00207364000'        / Observation ID                                 TARG_ID = '207364  '           / Target ID                                      SEG_NUM = '0       '           / Segment number                                 CREATOR = 'TDRSS2FITS V3.20'   / Program that created this FITS file            ORIGIN  = 'GSFC    '           / Source of FITS file                            TLM2FITS= 'V3.20   '           / 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    = '2007-04-02T23:55:56' / file creation date (YYYY-MM-DDThh:mm:ss UT)   TSTART  =     167887437.805592 / Start time                                     DATE-OBS= '2006-04-28T03:23:56'                                                 TSTOP   =     167887440.312892 / Stop time                                      DATE-END= '2006-04-28T03:23:59'                                                 UTCFINIT=    -1.15958000000000 / [s] UTCF at TSTART                             TRIGGER =               207364 / Trigger Number                                 FRAMENUM=             10947128 / 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 =                    T / 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 =                    1 / Inverse gain (data were divided by this value) RAWXCTRD=     303.131530761719 / [pixel] GRB RAWX coordinates CenTRoiD          RAWYCTRD=     319.421691894531 / [pixel] GRB RAWY coordinates CenTRoiD          XRA_OBJ =     123.545829772949 / [deg] XRT RA location of GRB or Object         XDEC_OBJ=    -37.1692123413086 / [deg] XRT DEC location of GRB or Object        PA_PNT  =     282.335754394531 / [deg] Roll angle from North towards East       RAWXCEN =                  303 / RAWX CENter image                              CRVAL1  =                  303 / WCS reference value                            RAWYCEN =                  319 / RAWY CENter image                              CRVAL2  =                  319 / WCS reference value                            STDVCTRD=     8.82188415527344 / STandard DeViation of CenTRoiD                 MAXSTDV =                  12. / MAX STandard DeViation of centroid             EVTCTRD =                  117 / 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  =             -1.15958 / [s] Packet #1 UTC Correction time              P1UTCCS =                   -2 / Packet #1 UTC Correction Seconds               P1UTCCSS=                42021 / [2*10**(-5) s] Packet #1 UTC Correction SubSecoPKT1TIME=        167887443.258 / [s] ccsds PacKeT #1 TIME=PKT1SEC+PKT1SUBS*2e-5 PKT1SEC =            167887443 / ccsds PacKeT #1 SEConds                        PKT1SUBS=                12900 / [2*10**(-5) s] ccsds PacKeT #1 SUBSeconds      CHECKSUM= '93ao93Yn93an93Wn'   / HDU checksum updated 2007-04-03T00:43:26       DATASUM = '557391995'          / data unit checksum updated 2007-04-02T23:55:56 FLUXFACT=        570000015360. / Flux conversion factor                         P2UTCC  =             -1.15958 / [s] Packet #2 UTC Correction time              P2UTCCS =                   -2 / Packet #2 UTC Correction Seconds               P2UTCCSS=                42021 / [2*10**(-5) s] Packet #2 UTC Correction SubSecoPKT2TIME=      167887443.33892 / [s] ccsds PacKeT #2 TIME=PKT2SEC+PKT2SUBS*2e-5 PKT2SEC =            167887443 / ccsds PacKeT #2 SEConds                        PKT2SUBS=                16946 / [2*10**(-5) s] ccsds PacKeT #2 SUBSeconds      BOREROW =     298.799987792969 / BOREsight ROW in RAWY                          BORECOL =     297.700012207031 / BOREsight COLumn in RAWX                       BOREPA  =                   0. / [deg] BOREsight roll (Position Angle)          PLATESCA=     2.35731220245361 / [arcsec/pixel] PLATE SCAle                     SCYCORR =                   0. / [arcsec] Spacecraft to XRT Y boresight corr    SCZCORR =                   0. / [arcsec] Spacecraft to XRT Z boresight corr    SCPACORR=                   0. / [deg] Spacecraft to XRT roll boresight corr    TAMREFX1=     327.640014648438 / TAM Ref Window 1 X pos                         TAMREFY1=     237.199996948242 / TAM Ref Window 1 Y pos                         TAMREFX2=     261.324005126953 / TAM Ref Window 2 X pos                         TAMREFY2=                 242. / TAM Ref Window 2 Y pos                         TAMTHETA=                  17. / TAM THETA-t angle XRT-PSU-037                  TAMOPTGN=     1.00999999046326 / TAM OPTical GaiN XRT-LUX-TN-095                TAMPRIPS=     9.49600028991699 / TAM PRImary window Plate Scale                 TAMSECPS=     5.65999984741211 / TAM SECondary window Plate Scale               TAMSEQCN=                95634 / TAM image SEQuence CouNt                       TAMCTRDC=                    T / TAM CenTRoiD Calculated?                       TAMCORR =                    F / TAM CORRection enabled?                        NOMEXPO =     2.50729990005493 / [s] NOMinal EXPOsure for flux calculation      RA_PNT  =     123.547981262207 / [deg] Spacecraft RA                            DEC_PNT =      -37.15576171875 / [deg] Spacecraft Dec                           GRBYXRT =     48.6117782592773 / GRB Y in XRT Coords                            GRBZXRT =     4.31755113601685 / GRB Z in XRT Coords                            XHIGHRA =     123.545831742583 / [deg] XRT HIGH precision GRB RA (double)       XHIGHDEC=    -37.1692109759682 / [deg] XRT HIGH precision GRB DEC (double)      WINHALFW=                   25 / WINdow HALF Width                              MINSTDV =                    5 / MIN STandard DeViation of centroid             TLMVER  =                    3 / Telemetry version from packet #3               P3UTCC  =             -1.15958 / [s] Packet #3 UTC Correction time              P3UTCCS =                   -2 / Packet #3 UTC Correction Seconds               P3UTCCSS=                42021 / [2*10**(-5) s] Packet #3 UTC Correction SubSecoPKT3TIME=      167887443.45808 / [s] ccsds PacKeT #3 TIME=PKT3SEC+PKT3SUBS*2e-5 PKT3SEC =            167887443 / ccsds PacKeT #3 SEConds                        PKT3SUBS=                22904 / [2*10**(-5) s] ccsds PacKeT #3 SUBSeconds      EXTNAME = 'LNG167887437I40'                                                     PROCVER = '3.9.10  '           / Processing script version                      SOFTVER = 'Hea_06Dec2006_V6.1.2_Swift_Rel2.6(Bld20)patched3_14Mar2007' / HEASOFTCALDBVER= 'b20061014_u20061116_x20061219_m20070104' / CALDB index versions used ATTFLAG =                  100 / Orgin of attitude information                  END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             )
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