batgrbproduct Analysis for Trigger=313299

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Jun  6 09:52:30 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger313299/SDC
======================================================================

  Trigger: 00313299      Segment: 000

  BAT Trigger Time: 234402480.704   [s; MET]
      Trigger Stop: 234402481.728   [s; MET]
               UTC: 2008-06-05T23:47:57.859480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 262.127299384762   Dec: 4.00166807477933  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    25.82
     Image Trigger?:     NO
     Rate S/N Ratio:     120.743529847359  [ if not an image trigger ]
     Image S/N Ratio:    25.82

  Flight Position:   [ source = BAT ]
    RA: 262.127299384762   Dec: 4.00166807477933  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 262.129755086617   Dec: 4.00988838608702  [deg; J2000]  
        { 17h 28m 31.1s , +04d 00' 35.6" }
         +/- 0.560516913179193 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.157279524781053 [arcmin] (formal 1-sigma fit error)
    SNR: 69.5468315664197
 
  Angular difference between Flight and Ground position is 0.514654 arcmin
 
  Partial Coding Fraction: 0.4140625    [ including projection effects ]

  Duration
     T90: 19.1399999856949 +/- 0.939105951293475
        Measured from: -2.77199998497963
                   to: 16.3680000007153     [s; relative to TRIGTIME]
     T50: 7.108000010252 +/- 0.118928538399279
        Measured from: 2.35199999809265
                   to: 9.46000000834465     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.57199999690056     
                   to: 8.57199999690056     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.53200000524521     
                   to: 29.972000002861     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.625723   7.237420   6.127881   1.608223
           0.064999   0.072210   0.070566   0.060553 [error]
 Peak      0.429365   0.843128   0.904476   0.319032
           0.015827   0.020455   0.021944   0.016579 [error]

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

======================================================================
 
=== 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   Power-law 1.54e-06 3.09e-06 4.83e-06 1.66e-05 1.35e-05 2.53e-05   erg/cm2
              Error 6.12e-08 7.02e-08 8.70e-08 7.46e-07 2.23e-07 0.00e+00   erg/cm2
Peak flux Power-law 4.37e+00 5.96e+00 6.00e+00 1.09e+01 1.99e+01 2.73e+01   ph/cm2/s
              Error 2.78e-01 2.26e-01 1.80e-01 7.40e-01 5.91e-01 8.34e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.41e-06 3.10e-06 4.96e-06 1.26e-05 1.33e-05 1.70e-05   erg/cm2
              Error 8.86e-08 7.25e-08 1.12e-07 2.40e-07 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 3.97e+00 6.02e+00 6.25e+00 8.28e+00 1.96e+01 2.45e+01   ph/cm2/s
              Error 3.74e-01 2.37e-01 2.45e-01 1.55e+00 6.14e-01 1.69e+00   ph/cm2/s
 
Fluence        Band 1.42e-06 3.09e-06 4.95e-06 1.27e-05 1.33e-05 1.47e-05   erg/cm2
              Error 8.68e-08 7.16e-08 1.12e-07 1.91e-06 2.42e-07 0.00e+00   erg/cm2
Peak flux      Band 3.97e+00 6.02e+00 6.26e+00 8.28e+00 1.96e+01 2.46e+01   ph/cm2/s
              Error 3.74e-01 2.37e-01 2.46e-01 1.56e+00 6.16e-01 1.93e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.357    0.033    -      -           3.89e-02 6.66e-04   36.954 57
CPL   1.112    0.144     223.4  133.8      4.89e-02 6.44e-03   28.098 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.991    0.052    -      -           1.73e-01 5.01e-03   62.528 57
CPL   0.676    0.219     257.6  226.6      2.34e-01 4.85e-02   56.004 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 16.448000 sec.
T50 in the 50-300 keV band: 6.656000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   35.504   -5.532   29.972
T90    19.140   -2.772   16.368
T50     7.108    2.352    9.460
Peak    1.000    7.572    8.572

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  262.1298  +4.0099 0.0027   29.6   63.9      18.7870    69.5  TRIG_00313299       
------------------------------------------
 
Foreground time interval of the image:
 -5.532  14.901 (delta_t =  20.433 [sec])
Background time interval of the image:
-216.099  -5.532 (delta_t = 210.567 [sec])

Lightcurves

Notes:

1 s binning

From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval

64 ms binning

Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -5.532 sec. to   29.972 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35722     ( -3.338385E-02   3.330016E-02) )
Norm@50keV  : 3.890122E-02    ( -6.668828E-04   6.659366E-04) )
------------------------------------------------------------
 Chi-Squared =      36.95428     using    59 PHA bins.
 Reduced chi-squared =     0.6483207     for     57 degrees of freedom
 Null hypothesis probability = 0.982
 
Photon flux (15-150 keV)    in 35.50 sec: 4.69350 ( -0.09491  0.09535 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34663e-05 ( -2.23295e-07  2.23153e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -5.532 sec. to   29.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11219     ( -0.146852   0.141183 )
Epeak [keV] : 223.387      ( -60.4470 207.092 )
Norm@50keV  : 4.886936E-02    ( -5.897988E-03   6.981723E-03) )
------------------------------------------------------------
 Chi-Squared =      28.09830     using    59 PHA bins.
 Reduced chi-squared =     0.5017554     for     56 degrees of freedom
 Null hypothesis probability = 0.999
 
Photon flux (15-150 keV)    in 35.50 sec: 4.58877 ( -0.10943  0.11032 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33139e-05 ( -2.39021e-07  2.41365e-07 ) ergs/cm2
 
Band function
Time interval is from   -5.532 sec. to   29.972 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.912717   ( -0.459034   0.940591 )
beta        : -1.43590    ( -7.46364   1.13145 )
Epeak [keV] : 118.293      ( -145.563 206.864 )
Norm@50keV   : 6.378316E-02    ( -5.928241E-03   6.953452E-03) )
------------------------------------------------------------
 Chi-Squared =      30.28362     using    59 PHA bins.
 Reduced chi-squared =     0.5506113     for     55 degrees of freedom
 Null hypothesis probability = 0.997
 
Photon flux (15-150 keV)    in 35.50 sec: 4.58891 ( -0.10965  0.11059 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33035e-05 ( -2.4243e-07  2.41258e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    7.572 sec. to    8.572 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.991416     ( -5.254853E-02   5.224532E-02) )
Norm@50keV  : 0.172668    ( -5.016461E-03   5.006269E-03) )
------------------------------------------------------------
 Chi-Squared =      62.52763     using    59 PHA bins.
 Reduced chi-squared =      1.096976     for     57 degrees of freedom
 Null hypothesis probability = 0.286
 
Photon flux (15-150 keV)    in 1.000 sec: 19.8696 ( -0.5898  0.5919 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.87293e-06 ( -5.6517e-08  5.6476e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    7.572 sec. to    8.572 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.675874     ( -0.226633   0.212323 )
Epeak [keV] : 257.632      ( -81.9171 371.182 )
Norm@50keV  : 0.233675    ( -4.216893E-02   5.490766E-02) )
------------------------------------------------------------
 Chi-Squared =      56.00361     using    59 PHA bins.
 Reduced chi-squared =      1.000064     for     56 degrees of freedom
 Null hypothesis probability = 0.475
 
Photon flux (15-150 keV)    in 1.000 sec: 19.6011 ( -0.6146  0.6133 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85847e-06 ( -5.865e-08  5.7807e-08 ) ergs/cm2
 
Band function
Time interval is from    7.572 sec. to    8.572 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.883641   ( -14.9986   1.372814E-03) )
beta        : -0.991421    ( -5.987394E-02   4.747719E-02) )
Epeak [keV] : 22.1112      ( -22.0112 9977.88 )
Norm@50keV   : 0.270172    ( -11597.9   2.525002E+07) )
------------------------------------------------------------
 Chi-Squared =      62.52765     using    59 PHA bins.
 Reduced chi-squared =      1.136866     for     55 degrees of freedom
 Null hypothesis probability = 0.227
 
Photon flux (15-150 keV)    in 1.000 sec: 19.6009 ( -0.6146  0.6165 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85734e-06 ( -5.8626e-08  5.8338e-08 ) ergs/cm2
 
Plot creation:
Sat Jun  7 09:21:25 EDT 2008