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  = '00744773000'        / Observation ID                                 TARG_ID = '744773  '           / 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  =       512606679.4354 / Start time                                     DATE-OBS= '2017-03-30T22:44:39.4' / Start Date                                  TSTOP   =       512606829.2482 / Stop time                                      DATE-END= '2017-03-30T22:47:09.2' / 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    = '2017-03-30T22:53:47' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=            -18.83476 / UTCF at TSTART                                 CHECKSUM= 'PemYRdlWPdlWPdlW'   / HDU checksum updated 2017-03-30T22:53:47       DATASUM = '         0'         / data unit checksum updated 2017-03-30T22:53:47 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  = '00744773000'        / Observation ID                                 TARG_ID = '744773  '           / 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    = '2017-03-30T22:53:47' / file creation date (YYYY-MM-DDThh:mm:ss UT)   UTCFINIT=            -18.83476 / UTCF at TSTART                                 TSTART  =       512606679.4354 / Start time                                     DATE-OBS= '2017-03-30T22:44:39.4' / Start Date                                  TSTOP   =       512606829.2482 / Stop time                                      DATE-END= '2017-03-30T22:47:09.2' / Stop Date                                   TELAPSE =     149.812799990177 / TSTOP - TSTART                                 ONTIME  =     149.812799990177 / Sum of GTIs                                    LIVETIME=     149.812799990177 / Ontime multiplied by DEADC                     EXPOSURE=     149.812799990177 / Total exposure, with all known correction      DEADC   =                   1. / dead time correction                           EXTNAME = 'wh512606679I'       / Extension name                                 HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'IMAGE   '           / Image data                                     HDUCLAS2= 'TOTAL   '           / Total data values                              DATAMODE= 'IMAGEEVENT'         / Instrument operating mode                      EXPID   =            512606679 / uvot EXPosure ID                               FILTER  = 'WHITE   '           / FILTER used in exposure                        DETNAM  = '2000    '           / WHEELPOS                                       RA_PNT  =     283.356344842006 / [deg] Ra Pointing                              DEC_PNT =    -13.4360387175676 / [deg] Dec Pointing                             PA_PNT  =             85.10349 / [deg] Position angle (roll)                    WINDOWX0=                  625 / Lower left hand X                              WINDOWY0=                  904 / Lower left hand Y                              WINDOWDX=                  320 / X Window width                                 WINDOWDY=                  320 / Y Window width                                 NFRAMES =                13570 / 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  =                625.5 / WCS reference value                            CDELT1  =                    2 / WCS coordinate increment                       CRPIX1  =                   1. / WCS Reference point                            CTYPE2  = 'RAWY    '           / WCS  axis type                                 CUNIT2  = 'pixel   '           / WCS axis unit                                  CRVAL2  =                904.5 / WCS reference value                            CDELT2  =                    2 / WCS coordinate increment                       CRPIX2  =                   1. / WCS Reference point                            UTCCTIME=            -18.83476 / [s] UTC Correction time                        UTCCSEC =                  -19 / UTC Correction Seconds                         UTCCSUBS=                 8262 / [2*10**(-5) s] UTC Correction SubSeconds       PKTTIME =      512606905.69556 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5      PKTSEC  =            512606905 / ccsds PacKeT SEConds                           PKTSUBS =                34778 / [2*10**(-5) s] ccsds PacKeT SUBSeconds         APID    =                  843 / Application Process Identifier                 BLANK   =          -2147483648 / Data null value                                CHECKSUM= '8h1Q9e0Q8e0Q8e0Q'   / HDU checksum updated 2017-03-30T22:53:47       DATASUM = '787902  '           / data unit checksum updated 2017-03-30T22:53:47 END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             ! %#(0. ""! !#*# $&"  %%""!,-2$' *$.-6)&#!  &# "-&./ $#-1!#%()!##"&" $
% %""# !"(5'#""$-$"# $#$"'$&&" !%#"!! #%%)%"'%&#! -%!-4-1#')%#  !'+# $/,/%!! , '$!& 
*  &+ $!( )!$" ( 8erh0 "!#$  ! %2&2/$#$!###!"#' c���Y !#))#,!"!.(/UGG."!  '    (e�
�Q  !%"&" " $!*!('/,#',2&'-F;*'"#""!%#!  *M���A  ""!$"!$ &!  "":3/?4'&!#!!"$!+526$&-  "$ #&$" !!)&'-23!-)/1
! !!!##! ++#&! !(#(.)# #$ +3"
!)DcjZ60$0"
  & + !/%278$%$!(+''*"	!&!#!" $"!!#'! $m�
@
'�1-($!  $"!Fu��U-#

!%($&-"%+! %! %.&!!  '!!)!9�
=
�
��4/!+
&!$" $"+x���g%'%2-#7* $!  "!#)!5�
9
�
7�,",oohD')$%#2 #%!%$ $ !('% !# H���X!$6%>/5!
"+""  !#& "" (
$' -+KYS8"&!&#
(',%$$""""! #!&$ !)"" ''!  )% !""  #$, !'-* 

!
!
& #* 	$$#)*'*$ & "%
!$"  +)+%"""*!"!$  !!!$"(%
%  !*  "-)<814#!"/2%*+%#)   "#& '$0,! '#''@/0,%$")*/##>a`;$." %"!%%& +)!$76/
"AR\GB'"$ #GVP@#7=J@%"#'!'(%$!"$.1#$)+" (* !;���S;$$#"*;< &D|rF2"  +#1.$"&$ !"BV��M
%-,"$& &"!V���X?.'*"$" ""'# " !FIdI,'%!+&-*$! !$T���O  %*!#$!!&)b^J_bZZ7*"#*!! *(1)%#)$!)&$!,#$!9QX9!*!#!+$=_qX33% '!  !"*#  + $ %*283 +&%", D<3(  #!$%
$ $"!#,"%$%'(!)+' (
' "$(1>)#)( %"&"! % ',$&
!!")-# (!( )"!!& ' !#&&! "!// &$&*34(&$%#!%$0#.&%!)$'"+#"#
$$+).,!  !%0%),!($!%-$.'! ""40%$.$#&'"%&#&'8-! " #)"!"% )!.&%& ! "'&&#&#-$"%'$ 4akS4*""*$ "#%*F;H!+  *1<'!" "!+16/###) '%4"&$#"))E��aRD10" & )=?L;! %$)<S?5+#$$-("'+/A, #%)"!- -7<d[@HI/& %!)7$ "%#'# %)&90+/%$&$&3$ &%""#"!(!#'*/ %!#2--"$ %#(#!!!")  !%!"" "$
 #$ 952#!%)!($%"!$ .,3#" %$  ) #"$%6)  $!!$" ,87  + #)$(##&#$(#&&FS�N?-#$!$! ' # "$,'$.$$'! 
!%%&"/&#$%'0"%## c�

��=!#)& $"$ 

#)"0$#&! ! !&%'"

' "i

E�lA$##' #" )*!!
"**+
#"# F���=$ $" ! '1+#-%  !$!%
$ $$$!&'  $ ''%*3S>= #$ "%)?W4 ! +" $! #$ !#  # $ ""#+5>G0"$#! # " #"  %'*<52%$ !$3#(!"!! %#!"%$# (HicB)!#!.,!## ! "##$%*%, !' "  #*+#%$!    %l��o5  !%$&"( &% & $!!!!#-""& "! ! "  $f��p.
  (  $ "#"%)
$' " $!!"T��p*!$$$"#'""#" %(%% &!
+C�nF' %)!!*+&%#!! *&( #+'##"'!"!('#! $,"4@;#! #$!(!"+"!&"!(%-%*")
!& ,%%#) "*"(("!"#!% "  #-*"!!3/ #
   "'#  ##!'#3%"!'$ & !%&*?P3&  %$'%."  "!%(#!"  $$ &@9,%"%&%# (%!!$'"-$SI9+/+. #% %! &!"  $("&&%'%  ""#'!'#1&0$*== $' "$#% $'#  3rf>(%,#
# % )"	

#&""% !#&,&  0D?,* *$#"!!##&Q��oE&6&$ $
	"%  & !+0$43;3  & "$)#$ 9h�
�N'$ #
 #!		
"$!# %%&$"&)#$%.+*%"%&$!"!!# "&._��oB,%!$ "'*!$%+$%"!! !"#"611# &"" .  $"$  #!*6^\2)$!)" "%,
	'W�D#
!"#0 %%'! 3"& ""%)<2 "-( %%,,&!&!*"$"'% :�
m�D&)	  #! !&K]G*',8"&*'.2'/% '%%
".x
�p�Q(

 )&   &  *$!$,8M61%''%! !"'"#,1DL('#(* $##((
'<U�4q�

Z%
	%# '$"27$&'!1#& !!% 33'"!!+%-=/!& !0Q�e�
�h

R3
$ #",,!"# #%&$%&  *%, !$ &$%*,'F�^.P��1
!!$"%!"!%"&!' %*#"#$*14!$)@4!/-Dq�n#)8E 
#)  %"   # %'! 298#)*% "#"'1?,)+(3K�?*$
 *"+, )#&$#$!%$ "(,8'.##$($"( ,"  '+;$" #$ *,$
 "!! ""!" %!,&% $  
	  !' "!) "('$);8"%"+' #)< !$ ))	  !



+! "&*'&*((%!",'$5?^_\F"%!'"!###(7E/) &+$'&*1$) #)HE8

	"#!-530*'&
&
#-,):HPL34!'%/)% )4;%'! !"!)"+X��o5)&$")4<##!")%$?L.B+-$!!# 5?8#%' !!" ' 07%*&#))$(%$!#"" ""F}�T)!HC-+!  ! $.C--++$!!44V��o'"' $&$ #),/.( %!   ,<<&
&4."%( "$ &$$&!!"
!#:��
�Z
oy,$+! $#  #./&"(% " !%!#$1$$#& ' " *!  !3�
ft�
z]"&
"%!("#$$(
%$',! :bX9&!!&# ""&" &!#"   !!$+d�


�K )*5%!  5m��Z9&"$"!'"#$ $'"#"/'8?xkU!! +DA #
#I���V
#+!  # !(4*(,"'"!.<9$""31(
%!1*",)78%)'(#&((@vth<&$!"   "  # "%"*! %+(24&.0L<(#)(# .AJ!%5`�da9!!03&$ "'"$$ !"""    '4#"#1(&
! %?6+!26�
&
�\
1!#
"!(%#'$ $!!!
  "-'-R
0
�
h�$(&!! !% $"!($
",(,#& R
E4
�
k *$%%3(" &""#!"& '$""#'  #"!$.'"))'"!$ (0���s'"#"6>@3%".;"%$- ! $ !" !"" #"!0,"!! 8(3#$$ -5;!"!"$+$##"$! 
!!)+#!""&$$
! '!
"!0)+
'$( *!"!- ""% !(!&!#
%( !% # *7"$ )&#- !%%(#"!&!,"#!&"!& "#&$%!%) %'  ))'!%""&(!& "%# %'  &(/&$&+ #%&# ! #'!")%)*"  $!"$1;%  '!
$$" ""+"

#,53$ $&
#  "" :/+'!$+"#!##"   !$$% "''+2'!"#!!!'&#'#*+"'!#!!%  $!.#!$#&!!-! " ## ).) !!8!" "! !$(%!%%!
" $'"! ) !'%!%##!  !  )% !!! "%!&"  ('& %) %,".0  &#$$ "$ %,#& "%#%!! %& #)"!/%# ##"$.''A%#""#(2PMT2!%$'-!,)#+,%((!-!-!(!"!"$&"%!"('%!$+BC1-" &L���B ,'+0%(! 1("
"%",'!'$ " %!# %7=*"!!  (c���P/!!!<II. (% ! #'$++!"&!+%(#$ ")9$ !,<<@.M�x,1%!!$! '(RgR'0%&"!$#%% '*&" (""%4;7)  )#($!" "&-F�]=%7-513&"
  #! (?94*)!! "% $!#Bv�uC,'2*,!"!!%"# /PaO0#!%-0%"" ""    U���k2$-:#!"
 #"3:2,! -*!(#$($)'*# %U��~L0"""*$!""!!*"## *>E:(#1*-7,'"!".1!  %"$'#"E^kYG(; +%!!!%!"!$$'%$ &&1)4-3"%"%  *)%(! !(0-)%# )" !$!$# !121'# #&/$ '!# "
$"$ )1!& !""-"
(!9:1'$*!"#$!  ")  "
#."% $) $") ,?	#4E=7/,.. # ! !-"&"$"#!*$*!  ## !+"+%5*9#$%Ee$!567+))#"" 
($++%%6$/<78'!&' $&& ")*3+8NH!7L!! $%*# !
	&%%7K@'$'&&L_fZ5  $#&ARB+ 3%""!!'!Mz�nG$" %/~��X&
%'!/0##&!* $+$2)".$$%$!& !  )5c���G!#$#&#3nn^D(!""!*
!!"#%&$ '# '$" (!$))%""-%# ('?_oX1)#!*!#6-5&$!'%.!"# $"($! #!&#&"&!7&1 ,66#%%-/ ("" $'" &#""(+'4`tR=;knc0+ !%/(!##' %!!#&" %!$$!*&#!1/�
7
�
������9!!# &##")%$!% !(( (#$"!# &!$1!	"+7�0
'��
��i<! !&*&"&%%"!*!*&$%" #!>_X&!%2 """##'+%!""&'b

3�OP�uR>,*(#!) "" '"&$ %""%&'{��^$ '$ %! %(&%""!+&vu^0,I;"% ) )!!$ !  !$ F�
�q+! " "!!//  !"& :cQ:&)7+%)#  #!$"'%%!'% ".s�gB,"&'"&!"*!""! $"022@'%(!"!'%!"**!*?8"%&! #*  !!!4:9%
! "%$'# ! 
 " "   !!5\B+
!&#!$,"") '"$!) ( "" 5D_^?*
 %!&0250" ('22+*1+(%( #"'"("! %"'

 !=Ue;5, "'+!,3/%!+.3"*$/2/#$2' &*$+>1+ !&
 !,)!%),,'"" ! ##+"++* $#%&'3) %"
!%=-""'$,, !"
#& #$$$'$!#"& &$$$&$0+" 0'  +**$$ (  &
#!$ $&+!$&% # !  ("#& #6!!&''$!(%/!$&*"!@*2  !
&  "'0*0!7# "#!! "! $!!)# !$ ! %3)'#)&5g]>)# 
 
## #'& %" %! + ""%~�qD&! "!" !
" !    ) "#$%#$ #"! *"#"!&+J��h:4"!%$"# ""#"%%  " ' %+FSB/' !#"# ! #!"! #$!!!# + " &##
&#$!#!!%!()#"*#"*)"  #/ 
#!"!2)!# !"!*1/-$ +" #!#"%!'5D98)%"'1%#%  &&#'#&NVc41!#"
 $$1(+(!#%'%"!3G\2 &(*0-$!!)m��d2
"
'""" "0.(&9,%(

! # -3="!# ">O=.("!&3���oA*!!!"$"+"(.>;/68?-$(&!! ' !+ #"* -$&&! +>T2!"%' #!&6p�Z2+""!"""$#!.83-'#! %(,44$&;7,0 %*($%!# "&%%7S.&	%)"%)&".,+"#"?.(#' $()%.* .' !$ "$ ,%)!)'&'" $ !:}�uB*$ "+(,3$%

.38%#',##-!%% $)  "#!&$!
!"))f�
l
A�4' ) "#   2%$'@SY?$!# !  " $.;TB0" ' #"'8�
�
N�C#!&!  //'"$!!"Pfk+$!# !$!30Q���o4'!'!'#% !!"0_���7+ ! &  &$!!+(&*$ %)77+
"HS�

�
�<$&%#!$"!"!"%6C$$! * '
!$"#$($#=Gn���<25$  " #
#)$ &)4.#  "
"& ! %+0:esD26G(!)$($"!#%! 
!##(%4!! #"  !$$#*%"!5$&""(;J&,N+)7(80%!#!($**:*-# & "* %"##!")'% "+!*!& ""! $
"!#"- %#,Dqo6("&"1%-<"& #$-#!&
&!$(2*#" '!#&'"%#"$#"!$9h��I4  !$'XfN91 %!  # "#89<*!1)*+6H;,.,$)# 
+K{`5/# ' .@��}f4#
"!!*"%!&  62$%"&"!,GQ=.#!!$%"%%',G<## ! # ! !1����P"&#&)
" "  !!&&-
"

 %#!),'%5dzhF?" &! $"!$
#!!&
 !9&,.<4" ! !&$!!)( !#"!!$ %<HD !! )&#,$  )$)(
!#$'$ ! #"+',,$&%  !" #//$,  "!<,!'9-A()7LD-#
 !&!#%2$")%$("%)&$ (:@  $+##&"Ow_)!!  #) &650	
6(Mii?(#&-9�
�~D$'!# 3.,%!)12;!"""&C=" !%#6m�m8+),"),9%&
	#.?X���o7(
,!)�
�i
�
$R%#!-I9=!!#&5# "!$.$&% 7bnT5 "%"!1%!,+!)5(0>M��
6�z0*
+���{
lg)#!# )@CG+""%$ "%0/!$"#B:1# #!2&#"-  .,83++Wb���C2%#�72
��==9**@;)$#*(//3," $!#%!!!'""!(-8@1" #$ %#"
 
-%0,1(5,7+@*#:z�a;''1Cp�Q2#$ (&""""!#!#"&!=L?"!"-1)%" !" (F`_J(		%!$"	+EX��[((""  !#&+!#-2-* *>>) ##   %
 
G�

�M!%	



"8;Wk;#!$!##19, *!*%$"#!!"(N=/5!!"&((!
&�"����$
$""/D(#"# $!'!  "