GRB130803A: Summary Image Light curves Spectra Distribution Others

Analysis Summary

Notes:

• 1) No attempt has been made to eliminate the non-significant decimal places.
• 2) This batgrbproduct analysis is done using the HEASARC data.
• 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Jan 12 00:10:27 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger565263
======================================================================

  Trigger: 00565263      Segment: 000

  BAT Trigger Time: 397216983.36   [s; MET]
      Trigger Stop: 397216983.872   [s; MET]
               UTC: 2013-08-03T10:02:52.493300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 220.240765275184   Dec: -2.46718097566164  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.49
     Image Trigger?:     NO
     Rate S/N Ratio:     12.5299640861417  [ if not an image trigger ]
     Image S/N Ratio:    7.49

  Analysis Position:   [ source = BAT ]
    RA: 220.240765275184   Dec: -2.46718097566164  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 220.255177870742   Dec: -2.49678297721365  [deg; J2000]  
        { 14h 41m 01.2s , -02d 29' 48.4" }
         +/- 1.08212923474767 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.214880092709856 [arcmin] (formal 1-sigma fit error)
    SNR: 27.1736635670597
 
  Angular difference between the analysis and refined position is 1.975096 arcmin
 
  Partial Coding Fraction: 0.3046875    [ including projection effects ]

  Duration
     T90: 43.5719999074936 +/- 1.60663619396323
        Measured from: 0.680000007152557
                   to: 44.2519999146461     [s; relative to TRIGTIME]
     T50: 3.27999997138977 +/- 1.29444351501821
        Measured from: 2.09599995613098
                   to: 5.37599992752075     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.08399999141693     
                   to: 3.08399999141693     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.139999985694885     
                   to: 45.7599999904633     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.560776   0.831373   0.581619   0.179508
           0.058680   0.059162   0.051211   0.042542 [error]
 Peak      0.098892   0.215737   0.197056   0.051986
           0.012310   0.014239   0.013531   0.009812 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   45.620    0.140   45.760
T90    43.572    0.680   44.252
T50     3.280    2.096    5.376
Peak    1.000    2.084    3.084
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_index}
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.645    -0.143      0.141       -           -               -         3.30e-03     -2.75e-04          2.74e-04      46.750   57
CPL     -1.167    -0.538      0.690       88.553     -26.757       -88.553      5.72e-03     -1.90e-03          6.73e-03      44.900   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.336     -0.115     0.116       -           -               -         4.19e-02     -3.05e-03          3.05e-03      56.390   57
CPL     -0.207     -0.569     0.656       85.674     -14.328        34.032      1.44e-01     -6.56e-02          1.46e-01      43.550   56
 
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1     Band2     Band3     Band4     Band5     Total
                       15-25     25-50    50-100    100-350    15-150    15-350    keV
Fluence         PL   2.21e-07  3.71e-07  4.74e-07  1.22e-06  1.40e-06  2.28e-06   erg/cm2
      90%_error_low -3.04e-08 -3.20e-08 -5.07e-08 -2.56e-07 -1.22e-07 -3.00e-07   erg/cm2
      90%_error_hi   3.17e-08  3.18e-08  5.03e-08  2.97e-07  1.23e-07  3.30e-07   erg/cm2
Peak flux       PL   1.47e+00  1.64e+00  1.30e+00  1.70e+00  5.04e+00  6.10e+00   ph/cm2/s
      90%_error_low -1.91e-01 -1.38e-01 -1.07e-01 -2.65e-01 -3.84e-01 -4.48e-01   ph/cm2/s
      90%_error_hi   1.99e-01  1.37e-01  1.06e-01  2.91e-01  3.85e-01  4.49e-01   ph/cm2/s
 
Fluence        CPL   2.02e-07  3.88e-07  4.91e-07  6.41e-07  1.36e-06  1.72e-06   erg/cm2
      90%_error_low -3.75e-08 -3.86e-08 -5.57e-08 -3.35e-07 -1.35e-07 -3.59e-07   erg/cm2
      90%_error_hi   3.86e-08  3.99e-08  5.69e-08  6.66e-07  1.34e-07  6.88e-07   erg/cm2
Peak flux      CPL   1.15e+00  1.78e+00  1.47e+00  6.82e-01  4.86e+00  5.08e+00   ph/cm2/s
      90%_error_low -2.30e-01 -1.64e-01 -1.37e-01 -2.40e-01 -3.94e-01 -4.67e-01   ph/cm2/s
      90%_error_hi   2.42e-01  1.68e-01  1.39e-01  3.63e-01  3.94e-01  5.13e-01   ph/cm2/s
 
======================================================================

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  220.2552    -2.4968   0.0071    48.4160  -164.1737         1.9889316     27.174 TRIG_00565263                 
 
Foreground time interval of the image:
  0.140  10.741 (delta_t =  10.601 [sec])
Background time interval of the image:
-176.459   0.140 (delta_t = 176.599 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Other quick-look light curves:

• 64 ms binning (zoomed)
• 16 ms binning (zoomed)
• 8 ms binning (zoomed)
• 2 ms binning (zoomed)
• SN=5 or 10 s binning (full-time range)
• Raw light curve

Spectra

Notes:

• 1) The fitting includes the systematic errors.
• 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
• 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from    0.140 sec. to   45.760 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.64546     ( -0.143139   0.141344 )
Norm@50keV  : 3.30444E-03    ( -0.00027469   0.00027368 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.75 using 59 PHA bins.
# Reduced chi-squared =         0.8202 for     57 degrees of freedom 
# Null hypothesis probability =   8.317438e-01
 
Photon flux (15-150 keV)    in 45.62 sec: 0.430850 ( -0.036911  0.037039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40287e-06 ( -1.21935e-07  1.22646e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.140 sec. to   45.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.16661     ( -0.538429   0.690254 )
Epeak [keV] : 88.5534      ( -26.7608 -88.5574 )
Norm@50keV  : 5.71933E-03    ( -0.00189753   0.00673193 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.90 using 59 PHA bins.
# Reduced chi-squared =         0.8018 for     56 degrees of freedom 
# Null hypothesis probability =   8.561503e-01
 
Photon flux (15-150 keV)    in 45.62 sec: 0.420688 ( -0.039014  0.039102 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36171e-06 ( -1.35077e-07  1.33613e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    2.084 sec. to    3.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.33568     ( -0.115231   0.115636 )
Norm@50keV  : 4.19178E-02    ( -0.0030472   0.00304719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.39 using 59 PHA bins.
# Reduced chi-squared =         0.9893 for     57 degrees of freedom 
# Null hypothesis probability =   4.979451e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.03535 ( -0.38429  0.38514 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.10781e-07 ( -3.16145e-08  3.1736e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    2.084 sec. to    3.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.207058     ( -0.568711   0.65641 )
Epeak [keV] : 85.6742      ( -14.3274 34.0316 )
Norm@50keV  : 0.143935    ( -0.0655769   0.145646 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.55 using 59 PHA bins.
# Reduced chi-squared =         0.7777 for     56 degrees of freedom 
# Null hypothesis probability =   8.873401e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.85890 ( -0.39363  0.39449 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.18629e-07 ( -1.95161e-08  2.55693e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 43.572 sec.
Hardness ratio (energy fluence ratio) = 1.27861547205

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 5.917542e-07
S(50-150 keV) = 8.111136e-07

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

IMX = -1.084240024452158E+00, IMY = 3.073460639511227E-01

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-176.459390 0.140000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9709 -15.6435    1.6  53.9  160.7   5.4327   7.2    0.5	Sco X-1                       
254.4403  35.2967    0.9   5.3   96.3   1.4428  12.5    2.9	Her X-1                       
268.2035  -1.4397   18.5  43.4  127.3  -0.3675  -0.6    9.9	SW J1753.5-0127               
299.4916  35.0793    6.6  40.3   54.4   0.7115   1.7    8.8	Cyg X-1                       
308.1693  40.9890    7.4  45.0   43.0   0.6965   1.5    3.5	Cyg X-3                       

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
0.140000 10.740590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.8434 -15.7381    8.5  54.0  160.9  -0.2693  -1.4    9.8	Sco X-1                       
254.4039  35.2763    7.5   5.3   96.7   0.0437   1.5    4.8	Her X-1                       
268.4650  -1.5017    5.2  43.6  127.0  -0.3341  -2.2    6.5	SW J1753.5-0127               
299.5898  35.2008   27.8  40.4   54.2   0.0412   0.4    0.1	Cyg X-1                       
308.0246  40.7695   29.3  45.0   43.3   0.0437   0.4   11.7	Cyg X-3                       
260.2502   7.9378    2.9  31.9  134.3   0.2046   4.0 ------	UNKNOWN                       
220.2552  -2.4968    0.4  48.4 -164.2   1.9890  27.2 ------	UNKNOWN                       
199.2534  67.7489    3.0  40.1  -50.3   0.2421   3.8 ------	UNKNOWN                       
169.3358  77.9475    2.9  50.7  -39.2   0.4843   4.0 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
74.340610 671.240600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9786 -15.6468    0.3  27.7  102.6  26.0873  44.6    0.4	Sco X-1                       
254.5006  35.3162    2.5  49.5   19.8   5.0309   4.6    2.6	Her X-1                       
250.2507 -22.9690    2.5  35.6  110.4   4.0476   4.6 ------	UNKNOWN                       
243.5672  -5.0752    2.5  23.4   79.8   2.2583   4.7 ------	UNKNOWN                       
224.6453 -39.6817    2.9  37.4  157.1   2.7445   4.0 ------	UNKNOWN                       
236.9861  32.4791    2.9  38.4    5.7   2.1202   3.9 ------	UNKNOWN                       
173.1245 -43.9840    6.9  58.7 -159.3   6.0185   1.7 ------	UNKNOWN                       
192.1268  41.3406    4.3  50.7  -44.6   6.0552   2.7 ------	UNKNOWN