batgrbproduct Analysis for Trigger=325730

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Sep 24 05:53:43 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger325730/GCN5_download_cron
======================================================================

  Trigger: 00325730      Segment: 000

  BAT Trigger Time: 243909440   [s; MET]
      Trigger Stop: 243909872   [s; MET]
               UTC: 2008-09-24T00:37:16.878600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 272.179861718762   Dec: -36.9795335679306  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    6.62
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    6.62

  Flight Position:   [ source = BAT ]
    RA: 272.179861718762   Dec: -36.9795335679306  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 272.125821717234   Dec: -36.8953570445558  [deg; J2000]  
        { 18h 08m 30.2s , -36d 53' 43.3" }
         +/- 3.91069145567521 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.57309153041725 [arcmin] (formal 1-sigma fit error)
    SNR: 4.33552681268088
 
  Angular difference between Flight and Ground position is 5.676706 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 432 +/- 
        Measured from: 0
                   to: 432     [s; relative to TRIGTIME]
     T50: 432 +/- 
        Measured from: 0
                   to: 432     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 432 second)
        Measured from: 0     
                   to: 432     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 432     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.592537   0.654351   0.007270   0.067014
           0.120975   0.105496   0.089165   0.076215 [error]
 Peak      0.592537   0.654351   0.007270   0.067014
           0.120975   0.105496   0.089165   0.076215 [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 2.29e-07 1.90e-07 1.07e-07 8.88e-08 5.65e-07 6.14e-07   erg/cm2
              Error 5.30e-08 5.17e-08 5.88e-08 9.15e-08 1.50e-07 1.98e-07   erg/cm2
Peak flux Power-law 1.76e-02 8.18e-03 2.30e-03 8.09e-04 2.86e-02 2.89e-02   ph/cm2/s
              Error 4.16e-03 2.13e-03 1.23e-03 9.15e-04 5.89e-03 6.02e-03   ph/cm2/s
 
Fluence   Cutoff-PL 2.21e-07 2.25e-07 6.06e-08 2.60e-09 5.09e-07 5.09e-07   erg/cm2
              Error 5.88e-08 6.82e-08 7.08e-08 5.83e-08 1.31e-07 1.44e-07   erg/cm2
Peak flux Cutoff-PL 1.66e-02 9.78e-03 1.42e-03 3.29e-05 2.79e-02 2.79e-02   ph/cm2/s
              Error 4.65e-03 2.83e-03 1.54e-03 2.78e-04 5.78e-03 5.77e-03   ph/cm2/s
 
Fluence        Band 2.23e-07 2.23e-07 5.40e-08 1.83e-09 5.01e-07 4.81e-07   erg/cm2
              Error 5.20e-08 4.86e-08 3.18e-08 5.90e-08 1.15e-07 2.12e-07   erg/cm2
Peak flux      Band 1.65e-02 9.87e-03 1.27e-03 2.09e-05 2.77e-02 2.83e-02   ph/cm2/s
              Error 4.07e-03 2.37e-03 6.29e-04 5.26e-04 5.57e-03 6.02e-03   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.830    0.502    -      -           1.17e-04 4.84e-05   56.012 57
CPL   1.222    3.302      15.6   15.0      1.42e-03 2.94e-01   53.661 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.830    0.502    -      -           1.17e-04 4.84e-05   56.012 57
CPL   1.222    3.537      15.6   15.0      1.42e-03 2.94e-01   53.661 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  432.000    0.000  432.000
T90   432.000    0.000  432.000
T50   432.000    0.000  432.000
Peak  432.000    0.000  432.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  272.1258 -36.8954 0.0444   10.4   76.7       1.2263     4.3  TRIG_00325730       
------------------------------------------
 
Foreground time interval of the image:
  0.000 432.000 (delta_t = 432.000 [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  432.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.83049     ( -0.451222   0.552584 )
Norm@50keV  : 1.171330E-04    ( -4.691626E-05   4.986815E-05) )
------------------------------------------------------------
 Chi-Squared =      56.01188     using    59 PHA bins.
 Reduced chi-squared =     0.9826645     for     57 degrees of freedom
 Null hypothesis probability = 0.512
 
Photon flux (15-150 keV)    in 432.0 sec: 2.855963E-02 ( -0.00588834  0.00589775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.65453e-07 ( -1.43955e-07  1.56259e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  432.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22220     ( -4.22220   2.38240 )
Epeak [keV] : 15.5705      ( -15.5605 14.3967 )
Norm@50keV  : 1.417695E-03    ( -1.417695E-03   0.586084 )
------------------------------------------------------------
 Chi-Squared =      53.66087     using    59 PHA bins.
 Reduced chi-squared =     0.9582299     for     56 degrees of freedom
 Null hypothesis probability = 0.564
 
Photon flux (15-150 keV)    in 432.0 sec: 2.785273E-02 ( -0.00576289  0.00579866 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.09345e-07 ( -1.19128e-07  1.43821e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  432.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.34130   ( -8.65870   0.787285 )
beta        : -9.01630    ( -0.983700   6.31749 )
Epeak [keV] : 14.6111      ( -14.5111 20.0099 )
Norm@50keV   : 1.141905E-03    ( -4.416652E-04   0.605655 )
------------------------------------------------------------
 Chi-Squared =      53.73183     using    59 PHA bins.
 Reduced chi-squared =     0.9769423     for     55 degrees of freedom
 Null hypothesis probability = 0.523
 
Photon flux (15-150 keV)    in 432.0 sec: 2.767885E-02 ( -0.00556954  0.00556268 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.00964e-07 ( -1.09418e-07  1.20429e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to  432.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.83049     ( -0.451222   0.552584 )
Norm@50keV  : 1.171330E-04    ( -4.691626E-05   4.986815E-05) )
------------------------------------------------------------
 Chi-Squared =      56.01188     using    59 PHA bins.
 Reduced chi-squared =     0.9826645     for     57 degrees of freedom
 Null hypothesis probability = 0.512
 
Photon flux (15-150 keV)    in 432.0 sec: 2.855963E-02 ( -0.00588834  0.00589775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.65453e-07 ( -1.43955e-07  1.56259e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  432.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22220     ( -4.22220   2.85250 )
Epeak [keV] : 15.5705      ( -15.5605 14.3967 )
Norm@50keV  : 1.417695E-03    ( -1.417695E-03   0.586084 )
------------------------------------------------------------
 Chi-Squared =      53.66087     using    59 PHA bins.
 Reduced chi-squared =     0.9582299     for     56 degrees of freedom
 Null hypothesis probability = 0.564
 
Photon flux (15-150 keV)    in 432.0 sec: 2.785273E-02 ( -0.00576289  0.00579866 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.09345e-07 ( -1.19128e-07  1.43821e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  432.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.34130   ( -8.65870   0.787285 )
beta        : -9.01630    ( -0.983700   6.31744 )
Epeak [keV] : 14.6111      ( -14.5111 20.0099 )
Norm@50keV   : 1.141905E-03    ( -4.416652E-04   0.605655 )
------------------------------------------------------------
 Chi-Squared =      53.73183     using    59 PHA bins.
 Reduced chi-squared =     0.9769423     for     55 degrees of freedom
 Null hypothesis probability = 0.523
 
Photon flux (15-150 keV)    in 432.0 sec: 2.767885E-02 ( -0.00556954  0.00556268 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.00964e-07 ( -1.09418e-07  1.20429e-07 ) ergs/cm2
 
Plot creation:
Wed Sep 24 06:19:41 EDT 2008