batgrbproduct Analysis for Trigger=330856

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Oct  7 16:45:14 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger330856/GCN5_download_cron
======================================================================

  Trigger: 00330856      Segment: 000

  BAT Trigger Time: 245049835.904   [s; MET]
      Trigger Stop: 245049836.928   [s; MET]
               UTC: 2008-10-07T05:23:52.748620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 339.976068527769   Dec: -40.1359411791978  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.43
     Image Trigger?:     NO
     Rate S/N Ratio:     14.7309198626562  [ if not an image trigger ]
     Image S/N Ratio:    9.43

  Flight Position:   [ source = BAT ]
    RA: 339.976068527769   Dec: -40.1359411791978  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 339.967200669639   Dec: -40.1469012581133  [deg; J2000]  
        { 22h 39m 52.1s , -40d 08' 48.8" }
         +/- 1.46193353980221 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.659160593990842 [arcmin] (formal 1-sigma fit error)
    SNR: 17.6810267100013
 
  Angular difference between Flight and Ground position is 0.773231 arcmin
 
  Partial Coding Fraction: 0.2890625    [ including projection effects ]

  Duration
     T90: 9.08799996972084 +/- 2.93713330647929
        Measured from: -4.06399992108345
                   to: 5.02400004863739     [s; relative to TRIGTIME]
     T50: 2.94399997591972 +/- 0.639999997615814
        Measured from: 0.672000080347061
                   to: 3.61600005626678     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.707999974489212     
                   to: 1.70799997448921     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.83200001716614     
                   to: 6.783999979496     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.521500   0.576359   0.184595   0.027817
           0.039960   0.039374   0.035472   0.033778 [error]
 Peak      0.101881   0.102121   0.052667   0.021493
           0.011992   0.011954   0.010433   0.009316 [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 2.42e-07 2.42e-07 1.70e-07 1.89e-07 7.27e-07 8.51e-07   erg/cm2
              Error 2.92e-08 2.30e-08 3.25e-08 6.90e-08 7.52e-08 1.13e-07   erg/cm2
Peak flux Power-law 1.40e+00 8.93e-01 3.67e-01 2.05e-01 2.77e+00 2.87e+00   ph/cm2/s
              Error 2.58e-01 1.15e-01 8.69e-02 9.16e-02 3.59e-01 3.67e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.28e-07 2.63e-07 1.52e-07 4.61e-08 6.76e-07 6.94e-07   erg/cm2
              Error 3.27e-08 3.08e-08 4.20e-08 8.12e-08 8.52e-08 1.23e-07   erg/cm2
Peak flux Cutoff-PL 1.38e+00 9.10e-01 3.67e-01 1.62e-01 2.75e+00 2.82e+00   ph/cm2/s
              Error 2.85e-01 1.05e-01 9.12e-02 1.35e-01 3.70e-01 4.12e-01   ph/cm2/s
 
Fluence        Band 2.25e-07 2.61e-07 1.52e-07 4.59e-08 6.74e-07 7.42e-07   erg/cm2
              Error 3.23e-08 3.07e-08 4.18e-08 4.17e-08 8.51e-08 1.54e-07   erg/cm2
Peak flux      Band 1.37e+00 9.15e-01 3.62e-01 1.87e-01 2.75e+00 2.83e+00   ph/cm2/s
              Error 2.47e-01 1.46e-01 9.57e-02 1.23e-01 3.64e-01 4.05e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.509    0.197    -      -           5.33e-03 7.38e-04   58.501 57
CPL   1.655    0.698      15.3   13.9      1.75e-02 3.46e-02   55.249  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.281    0.264    -      -           1.60e-02 2.84e-03   55.681 57
CPL   1.941    0.000       7.4 4999.8      2.49e-02 6.38e-03   55.684 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   13.616   -6.832    6.784
T90     9.088   -4.064    5.024
T50     2.944    0.672    3.616
Peak    1.000    0.708    1.708

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  339.9672 -40.1469 0.0109   49.3 -164.5       1.4027    17.7  TRIG_00330856       
------------------------------------------
 
Foreground time interval of the image:
 -6.832   6.784 (delta_t =  13.616 [sec])
Background time interval of the image:
-204.603  -6.832 (delta_t = 197.771 [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   -6.832 sec. to    6.784 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.50935     ( -0.189867   0.204134 )
Norm@50keV  : 5.327214E-03    ( -7.441984E-04   7.323809E-04) )
------------------------------------------------------------
 Chi-Squared =      58.50104     using    59 PHA bins.
 Reduced chi-squared =      1.026334     for     57 degrees of freedom
 Null hypothesis probability = 0.420
 
Photon flux (15-150 keV)    in 13.62 sec: 1.05253 ( -0.094766  0.09488 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.27365e-07 ( -7.4451e-08  7.59478e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -6.832 sec. to    6.784 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65507     ( -1.04648   0.349185 )
Epeak [keV] : 15.3213      ( -14.3914 13.4289 )
Norm@50keV  : 1.754609E-02    ( -8.300636E-03   6.085702E-02) )
------------------------------------------------------------
 Chi-Squared =      55.24881     using    59 PHA bins.
 but latest trial   2.00426     gives Chi-Squared =   23.9739
 but latest trial  0.840678     gives Chi-Squared =   5.21071
 Reduced chi-squared =     0.9865859     for     56 degrees of freedom
 Null hypothesis probability = 0.503
 
Photon flux (15-150 keV)    in 13.62 sec: 1.01553 ( -0.100416  0.10066 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.75754e-07 ( -8.22743e-08  8.81609e-08 ) ergs/cm2
 
Band function
Time interval is from   -6.832 sec. to    6.784 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.58348   ( -0.488923   0.562219 )
beta        : -9.17753    ( -0.822468   6.69384 )
Epeak [keV] : 16.9445      ( -16.8445 11.5041 )
Norm@50keV   : 1.946754E-02    ( -8.733143E-03   6.501795E-02) )
------------------------------------------------------------
 Chi-Squared =      55.26675     using    59 PHA bins.
 Reduced chi-squared =      1.004850     for     55 degrees of freedom
 Null hypothesis probability = 0.465
 
Photon flux (15-150 keV)    in 13.62 sec: 1.01548 ( -0.100369  0.10071 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.74101e-07 ( -8.19624e-08  8.82249e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.704 sec. to    1.712 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.28138     ( -0.250918   0.276803 )
Norm@50keV  : 1.599751E-02    ( -2.890344E-03   2.782155E-03) )
------------------------------------------------------------
 Chi-Squared =      55.68055     using    59 PHA bins.
 Reduced chi-squared =     0.9768517     for     57 degrees of freedom
 Null hypothesis probability = 0.525
 
Photon flux (15-150 keV)    in 1.008 sec: 2.76703 ( -0.35826  0.35884 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53584e-07 ( -2.26346e-08  2.30903e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.704 sec. to    1.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.94136     (     )
Epeak [keV] : 7.42180      ( -0.500185 9999.06 )
Norm@50keV  : 2.492376E-02    ( -5.639868E-03   7.111156E-03) )
------------------------------------------------------------
 Chi-Squared =      55.68405     using    59 PHA bins.
 Reduced chi-squared =     0.9943580     for     56 degrees of freedom
 Null hypothesis probability = 0.487
 
Photon flux (15-150 keV)    in 1.008 sec: 2.74959 ( -0.37266  0.36675 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51584e-07 ( -2.56848e-08  2.47434e-08 ) ergs/cm2
 
Band function
Time interval is from    0.704 sec. to    1.712 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.88030   ( -8.11970   6.88030 )
beta        : -9.33146    ( -7.60790   0.357991 )
Epeak [keV] : 12.2240      ( -10.6616 29.2151 )
Norm@50keV   : 2.746441E-02    ( -1.178004E-02   6.655122E-02) )
------------------------------------------------------------
 Chi-Squared =      55.75839     using    59 PHA bins.
 Reduced chi-squared =      1.013789     for     55 degrees of freedom
 Null hypothesis probability = 0.446
 
Photon flux (15-150 keV)    in 1.008 sec: 2.74834 ( -0.37204  0.35691 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51119e-07 ( -2.46053e-08  2.47131e-08 ) ergs/cm2
 
Plot creation:
Tue Oct  7 17:11:40 EDT 2008