batgrbproduct Analysis for Trigger=331964

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sat Oct 18 11:11:56 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger331964/GCN5_download_cron
======================================================================

  Trigger: 00331964      Segment: 000

  BAT Trigger Time: 245979496   [s; MET]
      Trigger Stop: 245979816   [s; MET]
               UTC: 2008-10-17T23:38:12.816960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 230.179956090345   Dec: -32.815165184944  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.34
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.34

  Flight Position:   [ source = BAT ]
    RA: 230.179956090345   Dec: -32.815165184944  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 230.208779582142   Dec: -32.7897988222791  [deg; J2000]  
        { 15h 20m 50.1s , -32d 47' 23.3" }
         +/- 2.28811426086122 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.41791226282059 [arcmin] (formal 1-sigma fit error)
    SNR: 9.32349618131217
 
  Angular difference between Flight and Ground position is 2.104639 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]
     T50: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 320 second)
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.825115   0.798801   0.661223   0.109210
           0.109398   0.099277   0.087468   0.082779 [error]
 Peak      0.825115   0.798801   0.661223   0.109210
           0.109398   0.099277   0.087468   0.082779 [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 2.21e-07 3.73e-07 4.78e-07 1.23e-06 1.41e-06 2.29e-06   erg/cm2
              Error 4.57e-08 4.73e-08 8.80e-08 4.85e-07 2.06e-07 5.59e-07   erg/cm2
Peak flux Power-law 2.23e-02 2.07e-02 1.33e-02 1.31e-02 6.17e-02 6.94e-02   ph/cm2/s
              Error 4.71e-03 2.67e-03 2.35e-03 4.76e-03 7.81e-03 8.78e-03   ph/cm2/s
 
Fluence   Cutoff-PL 2.15e-07 3.81e-07 4.81e-07 8.44e-07 1.38e-06 1.91e-06   erg/cm2
              Error 5.25e-08 5.76e-08 9.16e-08 5.83e-07 2.29e-07 8.20e-07   erg/cm2
Peak flux Cutoff-PL 2.16e-02 2.11e-02 1.34e-02 9.75e-03 6.10e-02 6.59e-02   ph/cm2/s
              Error 5.46e-03 3.19e-03 1.87e-03 9.05e-03 8.15e-03 1.04e-02   ph/cm2/s
 
Fluence        Band 2.09e-07 3.81e-07 4.78e-07 9.96e-07 1.38e-06 2.03e-06   erg/cm2
              Error 4.92e-08 5.81e-08 9.34e-08 4.65e-07 2.19e-07 7.57e-07   erg/cm2
Peak flux      Band 2.15e-02 2.12e-02 1.34e-02 1.09e-02 6.09e-02 6.69e-02   ph/cm2/s
              Error 4.23e-03 3.24e-03 1.89e-03 8.89e-03 8.26e-03 1.13e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.641    0.234    -      -           4.74e-04 6.41e-05   44.224 57
CPL   1.219    0.753      87.1    0.0      7.90e-04 1.07e-03   44.171 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.641    0.234    -      -           4.74e-04 6.41e-05   44.224 57
CPL   1.219    0.753      87.1    0.0      7.90e-04 1.07e-03   44.171 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  320.000    0.000  320.000
T90   320.000    0.000  320.000
T50   320.000    0.000  320.000
Peak  320.000    0.000  320.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  230.2088 -32.7898 0.0208   22.1  -50.4       2.3696     9.3  TRIG_00331964       
------------------------------------------
 
Foreground time interval of the image:
  0.000 320.000 (delta_t = 320.000 [sec])
Background time interval of the image:

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    0.000 sec. to  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64087     ( -0.230983   0.236251 )
Norm@50keV  : 4.738997E-04    ( -6.463315E-05   6.354152E-05) )
------------------------------------------------------------
 Chi-Squared =      44.22398     using    59 PHA bins.
 Reduced chi-squared =     0.7758594     for     57 degrees of freedom
 Null hypothesis probability = 0.892
 
Photon flux (15-150 keV)    in 320.0 sec: 6.169471E-02 ( -0.00780268  0.00782032 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41169e-06 ( -2.04048e-07  2.08202e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21918     ( -0.852338   0.654581 )
Epeak [keV] : 87.1403      (   )
Norm@50keV  : 7.896171E-04    ( -5.454122E-04   1.588799E-03) )
------------------------------------------------------------
 Chi-Squared =      44.17067     using    59 PHA bins.
 Reduced chi-squared =     0.7887620     for     56 degrees of freedom
 Null hypothesis probability = 0.874
 
Photon flux (15-150 keV)    in 320.0 sec: 6.096858E-02 ( -0.00832237  0.00798609 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38073e-06 ( -2.35635e-07  2.22922e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.21313   ( -10.3153   4.68468 )
beta        : -1.97363    ( -0.349043   0.249092 )
Epeak [keV] : 83.8501      ( -26.8119 407.660 )
Norm@50keV   : 8.029931E-04    ( -1.611456E-02   70.1914 )
------------------------------------------------------------
 Chi-Squared =      44.10232     using    59 PHA bins.
 Reduced chi-squared =     0.8018603     for     55 degrees of freedom
 Null hypothesis probability = 0.854
 
Photon flux (15-150 keV)    in 320.0 sec: 6.093514E-02 ( -0.00828823  0.00823681 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38014e-06 ( -2.07315e-07  2.30736e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64087     ( -0.230983   0.236251 )
Norm@50keV  : 4.738997E-04    ( -6.463315E-05   6.354152E-05) )
------------------------------------------------------------
 Chi-Squared =      44.22398     using    59 PHA bins.
 Reduced chi-squared =     0.7758594     for     57 degrees of freedom
 Null hypothesis probability = 0.892
 
Photon flux (15-150 keV)    in 320.0 sec: 6.169471E-02 ( -0.00780268  0.00782032 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41169e-06 ( -2.04048e-07  2.08202e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21918     ( -0.852338   0.654581 )
Epeak [keV] : 87.1403      (   )
Norm@50keV  : 7.896171E-04    ( -5.454122E-04   1.588799E-03) )
------------------------------------------------------------
 Chi-Squared =      44.17067     using    59 PHA bins.
 Reduced chi-squared =     0.7887620     for     56 degrees of freedom
 Null hypothesis probability = 0.874
 
Photon flux (15-150 keV)    in 320.0 sec: 6.096858E-02 ( -0.00832237  0.00798609 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38073e-06 ( -2.35635e-07  2.22922e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.21313   ( -10.3153   4.68468 )
beta        : -1.97363    ( -0.348531   0.249092 )
Epeak [keV] : 83.8501      ( -26.8119 407.660 )
Norm@50keV   : 8.029931E-04    ( -1.611456E-02   70.1914 )
------------------------------------------------------------
 Chi-Squared =      44.10232     using    59 PHA bins.
 Reduced chi-squared =     0.8018603     for     55 degrees of freedom
 Null hypothesis probability = 0.854
 
Photon flux (15-150 keV)    in 320.0 sec: 6.093514E-02 ( -0.00828823  0.00823681 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38014e-06 ( -2.07315e-07  2.30736e-07 ) ergs/cm2
 
Plot creation:
Sat Oct 18 11:38:04 EDT 2008