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  = '01069169000'        / Observation ID                                 TARG_ID = '1069169 '           / 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  =      650941421.93616 / Start time                                     DATE-OBS= '2021-08-18T01:03:41.9' / Start Date                                  TSTOP   =      650941571.79312 / Stop time                                      DATE-END= '2021-08-18T01:06:11.8' / 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    = '2021-08-18T01:10:07' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=            -27.56738 / UTCF at TSTART                                 CHECKSUM= 'JjjZKigWJigWJigW'   / HDU checksum updated 2021-08-18T01:10:07       DATASUM = '         0'         / data unit checksum updated 2021-08-18T01:10:07 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  = '01069169000'        / Observation ID                                 TARG_ID = '1069169 '           / 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    = '2021-08-18T01:10:07' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=            -27.56738 / UTCF at TSTART                                 TSTART  =      650941421.93616 / Start time                                     DATE-OBS= '2021-08-18T01:03:41.9' / Start Date                                  TSTOP   =      650941571.79312 / Stop time                                      DATE-END= '2021-08-18T01:06:11.8' / 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 = 'wh650941421I'       / Extension name                                 HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'IMAGE   '           / Image data                                     HDUCLAS2= 'TOTAL   '           / Total data values                              DATAMODE= 'IMAGEEVENT'         / Instrument operating mode                      EXPID   =            650941421 / uvot EXPosure ID                               FILTER  = 'WHITE   '           / FILTER used in exposure                        DETNAM  = '2000    '           / WHEELPOS                                       RA_PNT  =     149.119907225477 / [deg] Ra Pointing                              DEC_PNT =    -87.0264867685993 / [deg] Dec Pointing                             PA_PNT  =              358.519 / [deg] Position angle (roll)                    WINDOWX0=                  765 / Lower left hand X                              WINDOWY0=                  799 / Lower left hand Y                              WINDOWDX=                  320 / X Window width                                 WINDOWDY=                  320 / Y Window width                                 NFRAMES =                13574 / 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  =                765.5 / WCS reference value                            CDELT1  =                    2 / WCS coordinate increment                       CRPIX1  =                   1. / WCS Reference point                            CTYPE2  = 'RAWY    '           / WCS  axis type                                 CUNIT2  = 'pixel   '           / WCS axis unit                                  CRVAL2  =                799.5 / WCS reference value                            CDELT2  =                    2 / WCS coordinate increment                       CRPIX2  =                   1. / WCS Reference point                            UTCCTIME=            -27.56738 / [s] UTC Correction time                        UTCCSEC =                  -28 / UTC Correction Seconds                         UTCCSUBS=                21631 / [2*10**(-5) s] UTC Correction SubSeconds       PKTTIME =       650941683.8956 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5      PKTSEC  =            650941683 / ccsds PacKeT SEConds                           PKTSUBS =                44780 / [2*10**(-5) s] ccsds PacKeT SUBSeconds         APID    =                  843 / Application Process Identifier                 BLANK   =          -2147483648 / Data null value                                CHECKSUM= 'Rl2FRj09Rj0ERj09'   / HDU checksum updated 2021-08-18T01:10:07       DATASUM = '676430  '           / data unit checksum updated 2021-08-18T01:10:07 END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             !%'! "' $!*&',%#!!$$"($$'! $*  &"
!" !"!"! $%$"$" "!" "
 
! $$!&#"0,,!$"  "
& " ! !!#! #- ""  !   (8B(#% !!$  ""!!"& %+ '"$$ !   $! ",%!!" "   *&/ !#& !#"#"! "!"!!!.9%(#" %"$!!""  !" !! %")On!'"$#"%&"!%$  ""
!"$ ! " 0>v� ""!
 !) !   "  "!$"'&""&Ict)(&)# &&!!"! "$'
! $",;L'#" (" ## (!$!
 "&(& !!#$"!."
 !!"! 
# ! $(!)'"  " !"! !&  " ("!$&"# !   !!!   # "! %"#!!&!!!# #!$#'!" !"#+#$""% !'% '*  !*##"!  % !!" "% "$

!! #&  "
!"!!! "'%$ %!     $"$ #!! %'##  $!& !!# *#!  %"%""" # ! %%(!! "!%!"  !"" "'$$&% ! " "%! # # !!"&*' !%!! $%+&$   #!!#!% !!  $&'! $ 
 "  !!
"!(!!%"##!'"!## $#$!&"#"!"  $%#!#&"& ##""    !&& "#!%%" '" !  " 2"#(/""   	&# & "#H;7 # " 19K@,  #!$#"$ !!% !#"!(# ��T,!&!# $'3O?=$" "$ !!!"" %   #
(
{<
 #$!"+C78  !& !!! !*��w9'!"#  !"'!"$$""!~fB'! ##&)"!!!#
# #"#'!  /?'& ##"" " $  $!%!  "!! #
$ $  "%
#!! '""#!$" " ""    !($ ! !   ,"" $ !&#)&'
!  $!%$"%     #!""#% !   "!   !" ""!!&%%!!$   !)%%'$ 
    $' $!    "#!$"!"! ""#!'(#  !$"'#&
!!!!"!
" "'   !!  # ' #!" !"!"$" '(% !$    "!   #&! #!% "#"%!    !#& %$ ! "!#' #""$$#! $""$ "!' %!&%""! &)& !   $!&" #332+&"*!!#(#!!# #(!!!##*GCq8
!! !& !" !"'   &# "## "  "?u���3!"
!!#!$(#"#  ! #!!'L���z.!##
 !!'#  !%$#!	 #!'Cw��Z9#!&!   '#!! " 
'$%$>E9;$'#!#!  # %($$!"##    $%#  $"## $!##(   !!! ! %&#!   "%# !!$##$ !#$!"! &&   !""%"# !#!#  %% %
)"!"!$ " #"  !#
 !$  $"  *'"!"#""  "% # %$ !! $'#%
"!$$ $'!!$ # !"$!"! #$$ "   % ! '##!"#  !
"")   #$!#"$ % !!## !
""$!#$#%&#(!)
"#!"$! $!$!&! "!! ! #!"! !$ $!*!  ""!$#!#$! !##&* "! #()#$#!!  #"!#!$(&!%"
"   "
!   !% !!##! #!!$$#  !%" +!#! "!" && #!(%!) $# $"$$
!" $# #* $  !!! !%!% ()$"  # !$#' #"! %(""#  $"!'#!!  !%!'%"
$
*$ ! "%%!!!"!$%"! "!."(!%"!#*!$&$%!#"!'!#"!$ !!5$-1&"  "  +% (%+ ") * $!%
+:]_Q"$&%!!!' #" ""&%! %"'S���K # )!#!$ $!##  " "!!% /l���J  " #""  ###
#"!, !&",XOfY5(  "-31?& "! ')**!$  !#$#
 ""@STF'%!""!# !! 
(! &"#"&3UfE!%!
 %)#$$"!$!$$%)694! #    ""# # $!#"*($&&'!$%*%  $ !$&!$  # % $" #%& !%!$ !"!&%, 
&#!" # # #""  "& & "&%#&!#%"$  ""!("%%!'%!"!$!$!" %"""  #! !#!    "#" %! "
!$ !#!!$ *!"#$#!##'#  ""#$#%!$!#1)%  !"$"! & %"$  ""!" !##!##$&$$!" #!#!"$""!&!! %%#&$"#!&   !#$ #!% #! !&"! !! "!! ! #" "%!! # '!"!/"!# "! %$"*!
""!&#($! ! !"$ !"(! "  % &* 
$#)%$)  # "" !!! #'$!!*!'!!* "*! %$!$&" #$$$! "  &# $ #*% "&!$)#  "$'. !'&' ! #!! # $! "*!!&$!!  &!"#" 
 "! '"!"!!!&""8"!!&!$! "$)!!  $ !
%"$!"( "! !"/( %"$% !
!!  #'& && ! !"$"#$!## !"!*%." ('#) "$'"#!(!$ !#(#"  "!%")#( &!#&&"%#!!$'   
!!"#&!"$ 
#  "#
"!  '!# #!  $& !!'!!! !  !""!%$"!$"!""!%!"%2.>."!"!% !'  *"$'$"#"&! " # "  ;LJ"#!) # +  
 $ %!##   !%$<)"!  !! $"!
"!!'  +>-8*!$##!##&  %!! ! ! !% *.+*)<Oo�K)#'  (  ,$(%#"(!%# !! ! &/;MJ&.L���k?$$"""! $	$ ('Bi�g=')Hf�s_#!"!" "#!('!#!(L~�gG%(>FLU:)!&!## "#% "+$,
  $ '"!%   (,7QiN3*(' )#&#!"$! & !%*&<7%(!'(#" !%)7'!&&"%!$$)(,'" #'$<O[b:$ % &!$!! # # 
1Ya^7+!"   '#"

! 
" (JBD0""! "" &$!#!" #!($!%! #(!(!!&'"(#!$    ""! "!%#"     !#&%##   % ("& &! !"$"" %&""-$-!%%! ! !### !  "!" '" ## $ !" !" %! ("$  
".&&#" ""$  #"!!"#!##'$%!$%"!!'#!"!!-XV(*)$!$+  "&!.! ))&3r��L' $   &!$!  #%,[

.
�5& !!&  !
 !!  &%!!"%B�
]
{
Q�5)!' 
&!!($
!!!"%"+"##""%0r���e7"!   !" ! !&$#"!  !&'! !%AVnaE$ !!  #% "!( &" %#'! ,%$!!""$#"  " !" * &&!$! $ "!#!#,""#!%## "%!" #!!%$ '!#& !%"*! !$"$
""!"!#$!!!$$!! #!"  ,&  !% #%("" !$$$!"!& !"# +( #   ##'"
 ( #$%!"&%#!!
#!!% $!" !!    "*"  )/=7'$"
!!!% ""&$"& !!!" +!&"#%btkJ&   !
!!#!" #! !!)&" $$ (G����;&%"%" #   "!#$! # !&'# %!"$(2Q

�
z�M(!%!&#    !/,%!"" #% !
)2x

m
H�H  ##$(!' "!"$"!  '!!<z��S4! !  # #  $""!
""$ *%  " "+%)4%(&
 !!"  !
  "$193 & '("#%%&#
!#( # 
 )'=95)$' !! $!" (   ! !   )
"! #/148# $ !#("(!"!$& )"$# )$'$ 
$&!#%
#&  "!"$##"  
$#% !  " ""$! !35% )"$%&#"") $&!&"!#(!!!&=iWX