batgrbproduct Analysis for Trigger=316204

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Jul  7 20:34:06 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger316204/GCN5_download_cron
======================================================================

  Trigger: 00316204      Segment: 000

  BAT Trigger Time: 237112076.608   [s; MET]
      Trigger Stop: 237112077.632   [s; MET]
               UTC: 2008-07-07T08:27:53.685800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 32.6317294574555   Dec: 33.1030732163443  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.84
     Image Trigger?:     NO
     Rate S/N Ratio:     20.3715487874634  [ if not an image trigger ]
     Image S/N Ratio:    9.84

  Flight Position:   [ source = BAT ]
    RA: 32.6317294574555   Dec: 33.1030732163443  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 32.6273491063703   Dec: 33.1002395131566  [deg; J2000]  
        { 02h 10m 30.6s , +33d 06' 00.9" }
         +/- 1.80844860201312 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.809481408866625 [arcmin] (formal 1-sigma fit error)
    SNR: 13.0478254102267
 
  Angular difference between Flight and Ground position is 0.278174 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 31.7080000042915 +/- 6.13460347783576
        Measured from: -1.216000020504
                   to: 30.4919999837875     [s; relative to TRIGTIME]
     T50: 23.4480000138283 +/- 1.31271476447358
        Measured from: 1.41599997878075
                   to: 24.863999992609     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.215999990701675     
                   to: 1.21599999070168     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.82400000095367     
                   to: 36.5919999778271     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.384645   0.420857   0.205672   0.033636
           0.032696   0.033392   0.031706   0.032306 [error]
 Peak      0.051054   0.048812   0.012586   0.011059
           0.005951   0.006154   0.005529   0.005336 [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 1.12e-07 1.69e-07 1.93e-07 4.18e-07 5.99e-07 8.92e-07   erg/cm2
              Error 1.56e-08 1.56e-08 3.10e-08 1.38e-07 7.04e-08 1.68e-07   erg/cm2
Peak flux Power-law 5.15e-01 3.42e-01 1.48e-01 8.83e-02 1.05e+00 1.09e+00   ph/cm2/s
              Error 9.46e-02 5.12e-02 4.31e-02 4.74e-02 1.47e-01 1.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.11e-07 1.71e-07 1.92e-07 3.61e-07 5.93e-07 7.83e-07   erg/cm2
              Error 1.66e-08 1.90e-08 3.24e-08 2.36e-07 8.25e-08 2.62e-07   erg/cm2
Peak flux Cutoff-PL 4.91e-01 3.75e-01 1.33e-01 2.35e-02 1.02e+00 1.02e+00   ph/cm2/s
              Error 1.05e-01 7.42e-02 5.47e-02 6.46e-02 1.53e-01 2.04e-01   ph/cm2/s
 
Fluence        Band 1.09e-07 1.73e-07 1.89e-07 3.87e-07 5.91e-07 8.59e-07   erg/cm2
              Error 1.72e-08 1.98e-08 3.45e-08 2.80e-07 7.74e-08 2.38e-07   erg/cm2
Peak flux      Band 4.91e-01 3.76e-01 1.32e-01 4.12e-02 1.02e+00 1.04e+00   ph/cm2/s
              Error 7.68e-02 7.31e-02 4.86e-02 5.73e-02 1.47e-01 1.72e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.812    0.183    -      -           1.69e-03 1.94e-04   58.529 57
CPL   1.665    0.000      96.1 5000.0      2.05e-03 1.80e-03   58.554 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.207    0.299    -      -           6.31e-03 1.38e-03   42.439 57
CPL   1.338    1.296      27.8 5000.0      2.21e-02 1.63e-01   41.366  0
 
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: 4.416000 sec.
T50 in the 50-300 keV band: 2.496000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   38.416   -1.824   36.592
T90    31.708   -1.216   30.492
T50    23.448    1.416   24.864
Peak    1.000    0.216    1.216

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   32.6273 +33.1002 0.0147   19.3  -40.1       0.5762    13.0  TRIG_00316204       
------------------------------------------
 
Foreground time interval of the image:
 -1.824  15.093 (delta_t =  16.917 [sec])
Background time interval of the image:
-239.608 -198.458 (delta_t =  41.150 [sec])
-197.608  -1.824 (delta_t = 195.784 [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   -1.824 sec. to   36.592 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81249     ( -0.179894   0.186760 )
Norm@50keV  : 1.694851E-03    ( -1.958336E-04   1.915146E-04) )
------------------------------------------------------------
 Chi-Squared =      58.52885     using    59 PHA bins.
 Reduced chi-squared =      1.026822     for     57 degrees of freedom
 Null hypothesis probability = 0.419
 
Photon flux (15-150 keV)    in 38.42 sec: 0.234687 ( -0.021636  0.021638 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.98745e-07 ( -6.89793e-08  7.17455e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.824 sec. to   36.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66495     (     )
Epeak [keV] : 96.1140      ( -327.254 9672.74 )
Norm@50keV  : 2.050401E-03    ( -2.612985E-04   3.339920E-03) )
------------------------------------------------------------
 Chi-Squared =      58.55360     using    59 PHA bins.
 Reduced chi-squared =      1.045600     for     56 degrees of freedom
 Null hypothesis probability = 0.382
 
Photon flux (15-150 keV)    in 38.42 sec: 0.233926 ( -0.021544  0.021545 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.93389e-07 ( -8.81432e-08  7.67785e-08 ) ergs/cm2
 
Band function
Time interval is from   -1.824 sec. to   36.592 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.22439   ( -8.77561   5.01757 )
beta        : -1.88016    ( -8.11984   0.233009 )
Epeak [keV] : 39.8114      ( -39.7114 504.413 )
Norm@50keV   : 4.255088E-03    ( -8.737531E-02   207.780 )
------------------------------------------------------------
 Chi-Squared =      58.15116     using    59 PHA bins.
 Reduced chi-squared =      1.057294     for     55 degrees of freedom
 Null hypothesis probability = 0.360
 
Photon flux (15-150 keV)    in 38.42 sec: 0.233216 ( -0.023074  0.022119 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.90884e-07 ( -8.1362e-08  7.34398e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.216 sec. to    1.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.20733     ( -0.282847   0.314615 )
Norm@50keV  : 6.311255E-03    ( -1.395973E-03   1.364580E-03) )
------------------------------------------------------------
 Chi-Squared =      42.43917     using    59 PHA bins.
 Reduced chi-squared =     0.7445469     for     57 degrees of freedom
 Null hypothesis probability = 0.925
 
Photon flux (15-150 keV)    in 1.000 sec: 1.04889 ( -0.147446  0.14751 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.9412e-08 ( -1.08774e-08  1.14382e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.216 sec. to    1.216 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33791     ( -1.84425   0.748166 )
Epeak [keV] : 27.8293      ( -27.8193 9972.17 )
Norm@50keV  : 2.209677E-02    ( -1.780896E-02   0.307307 )
------------------------------------------------------------
 Chi-Squared =      41.36644     using    59 PHA bins.
 but latest trial   2.03578     gives Chi-Squared =   2.04098
 but latest trial  4.287813E-03 gives Chi-Squared =   9.10252
 Reduced chi-squared =     0.7386864     for     56 degrees of freedom
 Null hypothesis probability = 0.928
 
Photon flux (15-150 keV)    in 1.000 sec: 1.01821 ( -0.150329  0.15478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36009e-08 ( -1.11876e-08  1.87637e-08 ) ergs/cm2
 
Band function
Time interval is from    0.216 sec. to    1.216 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.37948   ( -8.62051   2.53300 )
beta        : -3.05178    ( -6.94822   1.05583 )
Epeak [keV] : 27.3969      ( -27.2969 16.8317 )
Norm@50keV   : 2.073786E-02    ( -1.533177E-02   1968.15 )
------------------------------------------------------------
 Chi-Squared =      41.25995     using    59 PHA bins.
 Reduced chi-squared =     0.7501809     for     55 degrees of freedom
 Null hypothesis probability = 0.915
 
Photon flux (15-150 keV)    in 1.000 sec: 1.02339 ( -0.143076  0.15125 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.46395e-08 ( -1.20662e-08  1.33884e-08 ) ergs/cm2
 
Plot creation:
Mon Jul  7 21:14:08 EDT 2008