batgrbproduct Analysis for Trigger=316910

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jul 15 01:38:17 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger316910/GCN5_download_cron
======================================================================

  Trigger: 00316910      Segment: 000

  BAT Trigger Time: 237750779.584   [s; MET]
      Trigger Stop: 237750780.608   [s; MET]
               UTC: 2008-07-14T17:52:56.643300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 188.109331293591   Dec: -60.2785024938338  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    17.38
     Image Trigger?:     NO
     Rate S/N Ratio:     51.7783738639985  [ if not an image trigger ]
     Image S/N Ratio:    17.38

  Flight Position:   [ source = BAT ]
    RA: 188.109331293591   Dec: -60.2785024938338  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 188.104304945256   Dec: -60.2741999624025  [deg; J2000]  
        { 12h 32m 25.0s , -60d 16' 27.1" }
         +/- 0.863850641070094 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.296249750393761 [arcmin] (formal 1-sigma fit error)
    SNR: 37.4904190206787
 
  Angular difference between Flight and Ground position is 0.298331 arcmin
 
  Partial Coding Fraction: 0.4335938    [ including projection effects ]

  Duration
     T90: 32.4799999594688 +/- 9.72107977190457
        Measured from: -2.47999998927116
                   to: 29.9999999701977     [s; relative to TRIGTIME]
     T50: 10.0799999535084 +/- 1.38933079114585
        Measured from: 0.0960000157356262
                   to: 10.175999969244     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.363999992609024     
                   to: 0.636000007390976     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.77599999308586     
                   to: 50.3200000226498     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.102968   1.420254   1.203716   0.252800
           0.056642   0.057162   0.050837   0.043089 [error]
 Peak      0.113164   0.172817   0.174891   0.063798
           0.010347   0.011283   0.011111   0.008420 [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 3.52e-07 6.39e-07 8.91e-07 2.59e-06 2.56e-06 4.47e-06   erg/cm2
              Error 2.91e-08 3.10e-08 5.12e-08 3.32e-07 1.23e-07 3.65e-07   erg/cm2
Peak flux Power-law 1.07e+00 1.31e+00 1.17e+00 1.79e+00 4.17e+00 5.33e+00   ph/cm2/s
              Error 1.38e-01 1.03e-01 8.80e-02 2.89e-01 2.82e-01 3.74e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.33e-07 6.52e-07 9.09e-07 1.82e-06 2.51e-06 3.58e-06   erg/cm2
              Error 3.64e-08 4.37e-08 6.86e-08 9.47e-07 1.36e-07 6.55e-07   erg/cm2
Peak flux Cutoff-PL 1.07e+00 1.31e+00 1.17e+00 1.78e+00 4.17e+00 5.32e+00   ph/cm2/s
              Error 1.38e-01 1.03e-01 8.81e-02 2.87e-01 2.82e-01 3.73e-01   ph/cm2/s
 
Fluence        Band 3.30e-07 6.49e-07 9.07e-07 1.82e-06 2.51e-06 3.95e-06   erg/cm2
              Error 3.65e-08 3.50e-08 5.65e-08 9.56e-07 1.36e-07 8.96e-07   erg/cm2
Peak flux      Band 1.03e+00 1.34e+00 1.17e+00 1.72e+00 4.14e+00 5.26e+00   ph/cm2/s
              Error 1.26e-01 1.25e-01 1.02e-01 5.09e-01 2.93e-01 4.59e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.520    0.082    -      -           5.00e-03 2.23e-04   57.725 57
CPL   1.264    0.325     152.5 4953.3      6.62e-03 2.36e-03   55.906 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.170    0.116    -      -           3.56e-02 2.34e-03   57.829 57
CPL   1.094    0.321     647.0 5000.0      3.87e-02 1.42e-02   57.726 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: 21.632000 sec.
T50 in the 50-300 keV band: 5.952000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   54.096   -3.776   50.320
T90    32.480   -2.480   30.000
T50    10.080    0.096   10.176
Peak    1.000   -0.364    0.636

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  188.1043 -60.2742 0.0051   31.6  -66.4       3.2663    37.5  TRIG_00316910       
------------------------------------------
 
Foreground time interval of the image:
 -3.776  13.217 (delta_t =  16.993 [sec])
Background time interval of the image:
-239.584 -204.174 (delta_t =  35.410 [sec])
-202.584  -3.776 (delta_t = 198.808 [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   -3.776 sec. to   50.320 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52006     ( -8.187258E-02   8.225489E-02) )
Norm@50keV  : 4.998426E-03    ( -2.234597E-04   2.231402E-04) )
------------------------------------------------------------
 Chi-Squared =      57.72474     using    59 PHA bins.
 Reduced chi-squared =      1.012715     for     57 degrees of freedom
 Null hypothesis probability = 0.448
 
Photon flux (15-150 keV)    in 54.10 sec: 0.627426 ( -0.029408  0.029483 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.55688e-06 ( -1.23002e-07  1.23862e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -3.776 sec. to   50.320 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26421     ( -0.347817   0.301455 )
Epeak [keV] : 152.513      ( -59.0377 9847.49 )
Norm@50keV  : 6.617474E-03    ( -1.735691E-03   2.979476E-03) )
------------------------------------------------------------
 Chi-Squared =      55.90602     using    59 PHA bins.
 Reduced chi-squared =     0.9983217     for     56 degrees of freedom
 Null hypothesis probability = 0.478
 
Photon flux (15-150 keV)    in 54.10 sec: 0.617236 ( -0.031866  0.031886 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.51383e-06 ( -1.36846e-07  1.34855e-07 ) ergs/cm2
 
Band function
Time interval is from   -3.776 sec. to   50.320 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.22879   ( -0.337674   0.314931 )
beta        : -8.50929    ( -1.49071   7.03690 )
Epeak [keV] : 140.199      ( -46.9171 9859.80 )
Norm@50keV   : 6.875262E-03    ( -1.996562E-03   2.740398E-03) )
------------------------------------------------------------
 Chi-Squared =      55.93699     using    59 PHA bins.
 Reduced chi-squared =      1.017036     for     55 degrees of freedom
 Null hypothesis probability = 0.439
 
Photon flux (15-150 keV)    in 54.10 sec: 0.617235 ( -0.03187  0.031978 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.51117e-06 ( -1.36456e-07  1.35688e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.368 sec. to    0.640 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17039     ( -0.115940   0.115152 )
Norm@50keV  : 3.564254E-02    ( -2.340939E-03   2.340689E-03) )
------------------------------------------------------------
 Chi-Squared =      57.82893     using    59 PHA bins.
 Reduced chi-squared =      1.014543     for     57 degrees of freedom
 Null hypothesis probability = 0.444
 
Photon flux (15-150 keV)    in 1.008 sec: 4.16711 ( -0.282  0.28246 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.67662e-07 ( -2.68249e-08  2.68451e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.368 sec. to    0.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09356     ( -0.456205   0.186209 )
Epeak [keV] : 646.957      ( -646.947 9353.04 )
Norm@50keV  : 3.868283E-02    ( -5.172517E-03   2.331383E-02) )
------------------------------------------------------------
 Chi-Squared =      57.72562     using    59 PHA bins.
 Reduced chi-squared =      1.030815     for     56 degrees of freedom
 Null hypothesis probability = 0.411
 
Photon flux (15-150 keV)    in 1.008 sec: 4.16593 ( -0.28191  0.28237 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.66578e-07 ( -2.52232e-08  2.7589e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.368 sec. to    0.640 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.733446   ( -10.3358   2.26732 )
beta        : -1.18115    ( -0.161210   0.132357 )
Epeak [keV] : 77.8975      ( -40.0113 888.642 )
Norm@50keV   : 7.316875E-02    ( -294.202   1567.79 )
------------------------------------------------------------
 Chi-Squared =      57.65179     using    59 PHA bins.
 Reduced chi-squared =      1.048214     for     55 degrees of freedom
 Null hypothesis probability = 0.377
 
Photon flux (15-150 keV)    in 1.008 sec: 4.14400 ( -0.29161  0.29396 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.66123e-07 ( -2.7974e-08  2.76615e-08 ) ergs/cm2
 
Plot creation:
Tue Jul 15 02:15:25 EDT 2008