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 2021-06-06T08:25:14                                  DATE    = '2021-06-06T08:25:14' / file creation date (YYYY-MM-DDThh:mm:ss UT)   INSTRUME= 'UVOT    '                                                            TSTART  =      643795258.77236                                                  TSTOP   =      643795408.61828                                                  DATE-OBS= '2021-05-27T07:07:43'                                                 DATE-END= '2021-05-27T08:03:23'                                                 OBJECT  = 'Burst   '                                                            XOBS_ID =          01051453000 / Generating sequence                            PROCVER = '3.18.15 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_18'       CALDBVER= 'b20171016_u20201215_x20200724_m20210504' / 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=    -27.0901400000000 / [s] UTCF at TSTART                             CHECKSUM= 'CLSTEKPQCKPQCKPQ'   / HDU checksum updated 2021-06-06T08:45:39       DATASUM = '         0'         / data unit checksum updated 2021-06-06T08:45:39 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  = '01051453000'        / Observation ID                                 TARG_ID = '1051453 '           / 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    = '2021-06-06T08:19:29' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=    -27.0901400000000 / [s] UTCF at TSTART                             TSTART  =      643795258.77236 / Start time                                     DATE-OBS= '2021-05-27T08:00:53'                                                 TSTOP   =      643795408.61828 / Stop time                                      DATE-END= '2021-05-27T08:03:23'                                                 TELAPSE =     149.845919966698 / TSTOP - TSTART                                 ONTIME  =     149.845919966698 / Sum of GTIs                                    LIVETIME=     149.845919966698 / Ontime multiplied by DEADC                     EXPOSURE=     149.845919966698 / Total exposure, with all known correction      DEADC   =                   1. / dead time correction                           EXTNAME = 'wh643795258I'       / Extension name                                 HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'IMAGE   '           / Image data                                     HDUCLAS2= 'TOTAL   '           / Total data values                              DATAMODE= 'IMAGEEVENT'         / Instrument operating mode                      EXPID   =            643795258 / uvot EXPosure ID                               FILTER  = 'WHITE   '           / FILTER used in exposure                        DETNAM  = '2000    '           / WHEELPOS                                       RA_PNT  =     172.326381241745 / [deg] Ra Pointing                              DEC_PNT =     31.6183923416611 / [deg] Dec Pointing                             PA_PNT  =             297.4993 / [deg] Position angle (roll)                    WINDOWX0=                  696 / Lower left hand X                              WINDOWY0=                 1035 / Lower left hand Y                              WINDOWDX=                  320 / X Window width                                 WINDOWDY=                  320 / Y Window width                                 NFRAMES =                13573 / 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  =                696.5 / WCS reference value                            CDELT1  =                    2 / WCS coordinate increment                       CRPIX1  =                   1. / WCS Reference point                            CTYPE2  = 'RAWY    '           / WCS  axis type                                 CUNIT2  = 'pixel   '           / WCS axis unit                                  CRVAL2  =               1035.5 / WCS reference value                            CDELT2  =                    2 / WCS coordinate increment                       CRPIX2  =                   1. / WCS Reference point                            UTCCTIME=            -27.09014 / [s] UTC Correction time                        UTCCSEC =                  -28 / UTC Correction Seconds                         UTCCSUBS=                45493 / [2*10**(-5) s] UTC Correction SubSeconds       PKTTIME =      643795486.17568 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5      PKTSEC  =            643795486 / ccsds PacKeT SEConds                           PKTSUBS =                 8784 / [2*10**(-5) s] ccsds PacKeT SUBSeconds         APID    =                  843 / Application Process Identifier                 BLANK   =          -2147483648 / Data null value                                CHECKSUM= 'URW6VRW4URW4URW4'   / HDU checksum updated 2021-06-06T08:45:39       DATASUM = '598895  '           / data unit checksum updated 2021-06-06T08:19:29 PROCVER = '3.18.15 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_18'       CALDBVER= 'b20171016_u20201215_x20200724_m20210504' / CALDB index versions used END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             &%	#! !$ $
 "     !! &( $!
 " ! #'

'$"
$# &'"""  % #!  "!   "$
 !#"   '"  # "
 ! $# 
 ##$	
 # !
  "# #* 
 ') ## #
  !

 #$#"
  
"& 
"!$# " ! )&

  "%!% %
#!
  	 
'
 !!!" "#&!
#

 ! $"
  " (!+   !
$"! !!!

"# 
"!$
#!

#!
%!'!  ""  $#
!!!!

 
$ !" ##$"#


! #!"  #
! 

"
 $!!#! 
 
!#!"!!	"$!# %!$(!#""!$!!"  

"
 #
! 
 !"  !" "#%"$!#!#
 !  "    !&
# !
  
%$!"
%!"! $!! $& ' 
% # ' #$"! $!$"
 $#
!'$!  &  #  %#

$" !!!!"!
 !


!%!#   
&'!"!  !  ! 
"" ! 
&! 
!'!!
 "  # 
!  
! " "(#  !%"  #&&!
 !!
 %"#$& !#'!

!!  "
#
 
  ! $     
  !!"!   !&  #
!  !!  !!("	 $% 
#!&  ! $ %
"#
% ! !$
"#!!
!!! !#!$!#"
! "
  #! "  ( "
$"  
" "" #
 &!#!   %!'#%"
 $!
  $!"' 


#! *"   %  !""!    #!
!  !#
"$!$$!

&% #
"!
!%!# $!$ $ $
"
 

 !#  
"
 
  #
 #
 ! 
 #
 ,!&  	  %
#!#" "!'"$!%  !#&'
""&
! !!! ! $"'% !#!"  #  !"#  !!  "!$#
#$" !!
"!"$%  " !$"!#
!!!'!$#&" "!##$ %#! !
$
 !%"	"$$
!!##"
" &#$& )#!" #&!!    !$!!%"!"!
!!
"!""!#
    
#!! #"  
!
$ !"! %#! #!"$"'
%"
  $!! 

'  ! 

$ # "! !"
" "
 !  ((# 
 !%!#!

!!
   "& !
  !&$",
$   !!&& $!""&!

  ! 
$" " #""!"
 "%&$! !! !
)!"
 ! !# # 

#!$  
 "!#"(%!$#!# "# "! "#!#!"! #!  "#  !   
 !$ % #&
) 
&"  
 #"# !!!""
"   "  !#"
"$ "
   
 %  "#!!! $!## ! #$ 
&!!"  
!$ #!# 
$""'
%#$#  "!!#"! 
#
%$ !  	$'!$
! "&$
! !' #!")% 
!
!"   !""!$"
&
#   


'%!"#  ! ! !) #

 

!!##   ' !%
$!%  "" $"!!!! ""! !

' $! !

%  '$$!&
# #!$ 
"&!$ !     ##  #
""#"'

  # "! %$! !$
&"	!


&
 $ *!  !!  $   "  ! $#" $
"(! !
# $#+! " $!$!(  "'!" ! $!#!!$ & 
 $ ##
 #! !#"#
 !!"#%!" !!#
"'!
! !"!"
"!$ " 
 
"!! ! 
"  !!
!*  "! %!# 
 "!
	& !"#! "&   "#! %  !!
!$#% !""#"!!$%"" $#$# % !""
! !	# # 
  "' !!
"   !!%!!%!!$!"  #$!!   #"