batgrbproduct Analysis for Trigger=324907

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Sep 17 01:50:19 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger324907/GCN5_download_cron
======================================================================

  Trigger: 00324907      Segment: 000

  BAT Trigger Time: 243269090.432   [s; MET]
      Trigger Stop: 243269094.528   [s; MET]
               UTC: 2008-09-16T14:44:47.329660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 163.624433225854   Dec: 69.0443697041981  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.33
     Image Trigger?:     NO
     Rate S/N Ratio:     8.48528137423857  [ if not an image trigger ]
     Image S/N Ratio:    7.33

  Flight Position:   [ source = BAT ]
    RA: 163.624433225854   Dec: 69.0443697041981  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 163.625669525109   Dec: 69.0679422249118  [deg; J2000]  
        { 10h 54m 30.2s , +69d 04' 04.6" }
         +/- 2.04543027534442 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.857014609142525 [arcmin] (formal 1-sigma fit error)
    SNR: 10.9430974302161
 
  Angular difference between Flight and Ground position is 1.414600 arcmin
 
  Partial Coding Fraction: 0.53125    [ including projection effects ]

  Duration
     T90: 33.4079999923706 +/- 7.33109105996622
        Measured from: -0.919999927282333
                   to: 32.4880000650883     [s; relative to TRIGTIME]
     T50: 12.6399999856949 +/- 6.96388397299989
        Measured from: 2.55200007557869
                   to: 15.1920000612736     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.29199999570847     
                   to: 4.29199999570847     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.58400002121925     
                   to: 35.7360000014305     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.259200   0.365165   0.260945   0.038233
           0.041055   0.041675   0.038787   0.038415 [error]
 Peak      0.013158   0.027528   0.025072   0.002876
           0.006848   0.007133   0.006700   0.006402 [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 8.46e-08 1.53e-07 2.13e-07 6.22e-07 6.13e-07 1.07e-06   erg/cm2
              Error 1.77e-08 2.01e-08 3.85e-08 2.38e-07 9.24e-08 2.70e-07   erg/cm2
Peak flux Power-law 1.53e-01 1.78e-01 1.48e-01 2.09e-01 5.54e-01 6.88e-01   ph/cm2/s
              Error 7.55e-02 5.90e-02 5.14e-02 1.41e-01 1.70e-01 2.19e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.75e-08 1.65e-07 2.17e-07 2.32e-07 5.75e-07 7.14e-07   erg/cm2
              Error 2.12e-08 2.74e-08 4.26e-08 3.61e-07 1.09e-07 4.01e-07   erg/cm2
Peak flux Cutoff-PL 7.80e-02 2.41e-01 1.87e-01 1.87e-02 5.23e-01 5.24e-01   ph/cm2/s
              Error 3.68e-02 7.71e-02 6.60e-02 2.63e-02 1.38e-01 1.37e-01   ph/cm2/s
 
Fluence        Band 7.49e-08 1.67e-07 2.11e-07 4.01e-07 5.82e-07 8.58e-07   erg/cm2
              Error 1.57e-08 2.79e-08 4.18e-08 3.82e-07 8.92e-08 3.68e-07   erg/cm2
Peak flux      Band 5.48e-02 2.55e-01 1.77e-01 7.56e-03 4.93e-01 4.93e-01   ph/cm2/s
              Error 2.59e-02 6.86e-02 4.61e-02 2.72e-02 1.28e-01 1.39e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.522    0.228    -      -           1.69e-03 2.30e-04   56.149 57
CPL   0.874    1.076      81.4 5000.0      3.74e-03 9.39e-03   54.965 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.255    0.453    -      -           4.68e-03 1.42e-03   68.078 57
CPL  -2.500    0.000      60.3   11.0      3.34e-01 6.35e-01   57.649 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: 9.472000 sec.
T50 in the 50-300 keV band: 4.992000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   38.320   -2.584   35.736
T90    33.408   -0.920   32.488
T50    12.640    2.552   15.192
Peak    1.000    3.292    4.292

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  163.6257 +69.0679 0.0175   30.0  -58.9       0.9532    10.9  TRIG_00324907       
------------------------------------------
 
Foreground time interval of the image:
 -2.584  35.736 (delta_t =  38.320 [sec])
Background time interval of the image:
-215.031  -2.584 (delta_t = 212.447 [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   -2.584 sec. to   35.736 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52191     ( -0.225393   0.229700 )
Norm@50keV  : 1.693434E-03    ( -2.311658E-04   2.283477E-04) )
------------------------------------------------------------
 Chi-Squared =      56.14852     using    59 PHA bins.
 Reduced chi-squared =     0.9850618     for     57 degrees of freedom
 Null hypothesis probability = 0.507
 
Photon flux (15-150 keV)    in 38.32 sec: 0.212677 ( -0.027418  0.027441 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.13323e-07 ( -9.13625e-08  9.34433e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -2.584 sec. to   35.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.873906     ( -1.33414   0.818085 )
Epeak [keV] : 81.4154      ( -81.4054 9918.58 )
Norm@50keV  : 3.736698E-03    ( -3.736698E-03   1.504472E-02) )
------------------------------------------------------------
 Chi-Squared =      54.96539     using    59 PHA bins.
 Reduced chi-squared =     0.9815248     for     56 degrees of freedom
 Null hypothesis probability = 0.514
 
Photon flux (15-150 keV)    in 38.32 sec: 0.206308 ( -0.029537  0.029145 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.74819e-07 ( -1.08009e-07  1.10419e-07 ) ergs/cm2
 
Band function
Time interval is from   -2.584 sec. to   35.736 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.857308   ( -9.14269   1.92056 )
beta        : -1.85528    ( -8.14472   0.479234 )
Epeak [keV] : 75.8464      ( -75.7464 399.584 )
Norm@50keV   : 3.918975E-03    ( -3.918975E-03   214.433 )
------------------------------------------------------------
 Chi-Squared =      54.57097     using    59 PHA bins.
 Reduced chi-squared =     0.9921995     for     55 degrees of freedom
 Null hypothesis probability = 0.491
 
Photon flux (15-150 keV)    in 38.32 sec: 0.206438 ( -0.028635  0.028039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.8187e-07 ( -7.97171e-08  9.86817e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    3.288 sec. to    4.296 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25536     ( -0.452016   0.453715 )
Norm@50keV  : 4.678570E-03    ( -1.426727E-03   1.421854E-03) )
------------------------------------------------------------
 Chi-Squared =      68.07776     using    59 PHA bins.
 Reduced chi-squared =      1.194347     for     57 degrees of freedom
 Null hypothesis probability = 0.150
 
Photon flux (15-150 keV)    in 1.008 sec: 0.553938 ( -0.169329  0.170964 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7053e-08 ( -1.53282e-08  1.58769e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.288 sec. to    4.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.49989     (     )
Epeak [keV] : 60.3337      ( -9.62806 12.3552 )
Norm@50keV  : 0.334306    ( -0.574576   0.695261 )
------------------------------------------------------------
 Chi-Squared =      57.64946     using    59 PHA bins.
 Reduced chi-squared =      1.029455     for     56 degrees of freedom
 Null hypothesis probability = 0.414
 
Photon flux (15-150 keV)    in 1.008 sec: 0.523176 ( -0.137478  0.138008 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.06069e-08 ( -1.14046e-08  1.22734e-08 ) ergs/cm2
 
Band function
Time interval is from    3.288 sec. to    4.296 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.50679   ( -3.32823   4.368973E-02) )
beta        : -9.14661    ( -2.002716E-05   1.47582 )
Epeak [keV] : 66.3913      ( -8.15257 9.32112 )
Norm@50keV   : 0.102211    ( -2.99696   8.10258 )
------------------------------------------------------------
 Chi-Squared =      59.32836     using    59 PHA bins.
 Reduced chi-squared =      1.078697     for     55 degrees of freedom
 Null hypothesis probability = 0.321
 
Photon flux (15-150 keV)    in 1.008 sec: 0.493450 ( -0.128747  0.126774 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.84817e-08 ( -1.07717e-08  1.37565e-08 ) ergs/cm2
 
Plot creation:
Wed Sep 17 02:13:28 EDT 2008