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= 'UVOTA   '           / Instrument name                                FILTER  = 'WHITE   '           / FILTER used in exposure                        DETNAM  = '2000    '           / WHEELPOS                                       OBS_ID  = '00863053000'        / Observation ID                                 TARG_ID = '863053  '           / Target ID                                      SEG_NUM = '0       '           / Segment number                                 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      TSTART  =      559441037.93196 / Start time                                     DATE-OBS= '2018-09-24T00:17:17.9' / Start Date                                  TSTOP   =      559441187.78892 / Stop time                                      DATE-END= '2018-09-24T00:19:47.8' / Stop Date                                   CLOCKAPP=                    F / If clock correction are applied (F/T)          ORIGIN  = 'GSFC    '           / Source of FITS file                            CREATOR = 'TDRSS2FITS V3.21'   / Program that created this FITS file            TLM2FITS= 'V3.21   '           / Telemetry converter version number             DATE    = '2018-09-24T00:24:31' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=            -21.64234 / UTCF at TSTART                                 CHECKSUM= 'FjhYIhfWFhfWFhfW'   / HDU checksum updated 2018-09-24T00:24:31       DATASUM = '         0'         / data unit checksum updated 2018-09-24T00:24:31 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  = '00863053000'        / Observation ID                                 TARG_ID = '863053  '           / 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    = '2018-09-24T00:24:31' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=            -21.64234 / UTCF at TSTART                                 TSTART  =      559441037.93196 / Start time                                     DATE-OBS= '2018-09-24T00:17:17.9' / Start Date                                  TSTOP   =      559441187.78892 / Stop time                                      DATE-END= '2018-09-24T00:19:47.8' / Stop Date                                   TELAPSE =     149.856960058212 / TSTOP - TSTART                                 ONTIME  =     149.856960058212 / Sum of GTIs                                    LIVETIME=     149.856960058212 / Ontime multiplied by DEADC                     EXPOSURE=     149.856960058212 / Total exposure, with all known correction      DEADC   =                   1. / dead time correction                           EXTNAME = 'wh559441037I'       / Extension name                                 HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'IMAGE   '           / Image data                                     HDUCLAS2= 'TOTAL   '           / Total data values                              DATAMODE= 'IMAGEEVENT'         / Instrument operating mode                      EXPID   =            559441037 / uvot EXPosure ID                               FILTER  = 'WHITE   '           / FILTER used in exposure                        DETNAM  = '2000    '           / WHEELPOS                                       RA_PNT  =     267.592561584518 / [deg] Ra Pointing                              DEC_PNT =    -31.7718349849805 / [deg] Dec Pointing                             PA_PNT  =             271.3785 / [deg] Position angle (roll)                    WINDOWX0=                  910 / Lower left hand X                              WINDOWY0=                  837 / Lower left hand Y                              WINDOWDX=                  320 / X Window width                                 WINDOWDY=                  320 / Y Window width                                 NFRAMES =                13574 / 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  =                910.5 / WCS reference value                            CDELT1  =                    2 / WCS coordinate increment                       CRPIX1  =                   1. / WCS Reference point                            CTYPE2  = 'RAWY    '           / WCS  axis type                                 CUNIT2  = 'pixel   '           / WCS axis unit                                  CRVAL2  =                837.5 / WCS reference value                            CDELT2  =                    2 / WCS coordinate increment                       CRPIX2  =                   1. / WCS Reference point                            UTCCTIME=            -21.64234 / [s] UTC Correction time                        UTCCSEC =                  -22 / UTC Correction Seconds                         UTCCSUBS=                17883 / [2*10**(-5) s] UTC Correction SubSeconds       PKTTIME =      559441282.09542 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5      PKTSEC  =            559441282 / ccsds PacKeT SEConds                           PKTSUBS =                 4771 / [2*10**(-5) s] ccsds PacKeT SUBSeconds         APID    =                  843 / Application Process Identifier                 BLANK   =          -2147483648 / Data null value                                CHECKSUM= 'C49fD16ZC16fC16Z'   / HDU checksum updated 2018-09-24T00:24:31       DATASUM = '697968  '           / data unit checksum updated 2018-09-24T00:24:31 END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             #
 
% $ !#
"'* %  $ '$ $""!$!  #"!(-  


&! 
#$#"
()O_3"  %  !%)+&[��s1%! %" $
"A��n0!
)
 #  
!QoE1."
&! #&
$/;- !!#!
" 
 
!!##! "  !!!#! !  &!"!  !" $!$"$ # 
  #  
# " ! #' # !#"   !  
!!$"! !
" %

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

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

"! !(#    $!$$   & "!&!'!%& " !! ""!!! ! $"!)'$ )$$# #" !
#$#    $!%"!   !!"%%  ""* $$ #!""" #!$!" %!" $# ! $   #! &  "')!  "!#% " ! # %"  +%$%#!"&  & *&"  %#!"%# "'!! !&# %  !"
! "-.  '(&"!&' %!%!$
$&"!"(0.!!"%"*!&%)%!&#'"& ) "%'&
#"""! "!!"' "% )!&)  !"%"""&! !"$## !%! # $ ""%  &*
!&%& !&!$" ""#(###%# #%$!%"""&*#%# #$"!" %&"$ #!"!%## "! )"#"!#!!"!#&   !%!,# !'!!$!2!)"'
!"#!#  "$#!#%"!+$ #"  !&!!"#  ##""  $%$&'!%!  &%# %  "'# #$"!#$ & "#!#%" !"!#! ! $!# 
#!$!(%!! !"(""
"#("!&!" !!%!#"##'/.9;!'# %#"$!""! " !*+'3/@(*#!' !  #$! !#" '"! (-'  ##
& &-! 
" #%!" $ .$&"!!!!"!DK7&#  $"'%'# '   #
!%"#"%,#" +$!#"5q��S* #"(!))1* "%#&!#%#!$!#! ( $,���R2!*,X��Z'#$"$" #"!" "##'"!%$! " .H�i.' 4B ! +�

B�."% %( &#  !!"# )2F5/ -��?1"B���'! # ""! $%$%!  #)!&#	&$"l
��
K�#>cpF"!%   )"# "(!&!#& *!!"
!4��\`�& "*-/+ - ## ! $$#!!!""' " !  % "!!/��U
��!#"#! !"%% " & #&$ % !! !!
$@�
I�W!" " 
 " )"#!# ! !! #$" !;<0 !"!#$&   ""%! &!#! $!''!!!! !!!
!"!'"#!#   !!""&  %%!$%*$%'" (!%#% "#!!#  !!"  !%  "%''"-  " !.!&!%!&!# "   $ !$" #"$""(#!" !#$!"' &)!"(!""# $"! '$' %!
&!##& &$!" #$%'$! .2*!"")!!#(! "#% !!!%" !##! #!!%+ !&#)"%0TM-$&""%&#" &'  ""&#!$#.2('+""&!!# !'% 
$!6=�
L
M}4%+)'"  $%( !   %6ND#+!#$%#""".z
^d�6#!!  #"&"!%'" $"" !"%)91$$
 &! !!%!  " 
0q
/
��?! !$# !(# !$&!!'"%"   "*&   !"%&)5n��J%)$'!" &)"  "%"!! # '%$!!QI3"#"  &"0#(
!!!%) -!!!!!$&#"!+% 2   !#!""' # %!' &  "##% # #!"! !!&  ##" ! !# ! "'
!!!    !#! ")#$ "%" % +#$"$!""  # ""("! #!'%##  %# #"!$$*"! $% '! *$#!#&'$# #&&!"!!% !!&&!%
!# "#"!&#%% &!"""!& !!$  !$ ,   #""!#$#&&*!%*'%!! ##&".##$$  &!& "  '!$$& # !! % ##!-&$)$&
#!!"#!!"#$ "$!"!"" "#&&""!" %!$%#*'!!!&$#)(,'!%%# $') ! ("%"#!! "%!$#&$"##!"$#   #%""#''$&!"&!# ! ##)!!#''($ % %   $% &!#"( "! ")# ) *%  %
 !"#"$ #$!%""#)"(!$!$& %"""$& !  ## !!(!&" $# !! "%#!!!#!#%! &  """&%!"!!#"#!!%' " ! $"#" "  # !!&!  "( %%"! #%! !"&)%! #& '! (#"  (!  #$%($& $# '!%"# #!!"%&"##  ## '%!  !'!!!#% .("$("%"%"!% %   *&$!! ""  %(#(#$"!"!&"%##!! #$##!$ #' ,*!"# ##+%#%"  % "!# +"$#" !" (% %! %"!!" $ #""& %$  %$( '$ '"!## )!  %""!#"$!$%##! '! (%(%. $" $ "   ! *!%#!"%%"    " &!!# !!!" +"$&&#$"! 
!
"%( ! #  !$&"$!'#! &)%###!! ! !$!$+ #! %%! $ $ "#%
%!##'#-%*") !
 !#&  2" !%  *#( !"# )&'"##!)!(%	" !!"!
 "!#!!%"&#!%!"'"!(""$''&$#&#!%!,0-2(
!!$' % (# "$#$  '&!" !%##!%! !'&'# '% '"& 8���K%(	! #% "/ !$%,!( *" %#!%%!!#"$)!""+�P��3 
$" #!  ""! #$'"#"&'#!&$$' &' "" %�-��."& $ ! "*!!%$'(! ! !%" # ! #"$"$ 3�
�B
��#! "! + &$'!"$$!!!! '# '&&($!$" " ! !
D���C
	$&(#   *!  %# % "  $##&(!" (**! #&$.C2  !*! ##"$#  !'#"#
"$   !& %(!%"$$!!)& "#"%  !$ !" !"&!") #  (#"!$ "!!!.$$#%!!!!%'&"&!!%)!"'#!"
 !*,%%(($(#($""* $! *!  #"#" "$"(*$ '% !$&&(2"$"!"#$!' !%,'! #$!("!#!""! %&"!#&!  " %  ' $'!$"(%#(*#,( '"  %" #!
'&$ &! %"&&&%$"! %()!!' " !!%!#"!! !"$/!"   #!'(  ! !'''*!#"')! $ *" !"!"%&'# ""-%#$"! &!# #!%*!$"!( ,-  # $$(.&"&%#() &%"""+' "!   #"'#!''G]B  ! %#% %$ "$ !(&!#!!!".! )&&  !.!#"#"&8OzT)! !$ ##",( #$!"!#   "$*!% #(  ""!'.JT? &!$"!$ ''!# '#&(#"&#""-%(#&'"!")#%'".>%-* $  &!*( &&"'! & $(#&%% !%")%!$$" #!' " !"! !%*$$!$$")&$# #!$"  "! !%'" $ %!!!') $#!""#!#! "- ) 
 (!  !#!  ".# "$+#!#'#!  #$#%'"'( )" "%"  ""#"#!$&!!" %!(!'' ! $"!$ & !%"#$*!#!"$$ $ "
%$! ! $"#&$$%! !! !## &!"&!&"#)#$!  % !!$$!""$!%,#%  $ !)!$""$"'  &!#  & "#'$  $!#! & %""!"# !!!&  !%*" ()" #$ #'('&%% $#"&% &## !
!#!!!("##"- $$"" )!%&##$"" "! ") ' ! %"!!("$%$$!,!!%& "&%'! "#! #'""#% !$!"!)""$&!%'  ! #! !"  ##' !" #% $ %& !#%",! +$#"("#"! '!$&#"%$$"%!'!$!$ $!"#(!$!! %!"""!" # %!%# %!!" ##% ""#"$&  !!#! %!# #'!! &% "%"# &% & !   !"$$%*++!!!
   ($"!" ##"! !&$# !""#$&  #& #!%!$ %%#%!!"&&%!  # "#!"%! (! !)   !(72!$#!!-#!" #' $&($*'*% $!)`��B#&
'" "!"% ') !"  #, %" ! "!"&+=�
J
o9(#! ($$ #)#!&!  %"  #*    $&) ' #(#*���O. ( ! #!!##!!  !&+! % "  !$@}�;& ! $#&(!#&!&$ !"" #$%"! #'%#(!2*"%"#$  !"$$  &$ !#"#'$)#"#(! "&"! "#"($!'(  #""
! !! #"$)%"  "'#$## !"'$%' !!# !!"   &#* !   $# $! !$$"&!'"-%"%#"! ! $&$%"!! !&" #$"& &"!*#""& &"%#!!!!!#!!!!'$"&%!" #("#()# 
" #!!&# "  #! "#!!  "!""!*$#,  "!!#