batgrbproduct Analysis for Trigger=316534

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Jul 10 19:03:40 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger316534/SDC
======================================================================

  Trigger: 00316534      Segment: 000

  BAT Trigger Time: 237366793.728   [s; MET]
      Trigger Stop: 237366797.824   [s; MET]
               UTC: 2008-07-10T07:13:10.798420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 8.25709402209318   Dec: 19.4919117249144  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.57
     Image Trigger?:     NO
     Rate S/N Ratio:     12  [ if not an image trigger ]
     Image S/N Ratio:    8.57

  Flight Position:   [ source = BAT ]
    RA: 8.25709402209318   Dec: 19.4919117249144  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 8.25924160262501   Dec: 19.4835559602816  [deg; J2000]  
        { 00h 33m 02.2s , +19d 29' 00.8" }
         +/- 2.34671986865625 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.40961376016213 [arcmin] (formal 1-sigma fit error)
    SNR: 8.99265686748045
 
  Angular difference between Flight and Ground position is 0.515852 arcmin
 
  Partial Coding Fraction: 0.484375    [ including projection effects ]

  Duration
     T90: 119.659999996424 +/- 17.4370466608647
        Measured from: -92.2359999716282
                   to: 27.4240000247955     [s; relative to TRIGTIME]
     T50: 69 +/- 14.6999888568544
        Measured from: -65.4119999706745
                   to: 3.58800002932549     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.888000011444092     
                   to: 1.88800001144409     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -96.919999986887     
                   to: 43.3320000171661     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.614461   0.759623   0.605963   0.175092
           0.087256   0.088920   0.084157   0.084810 [error]
 Peak      0.037805   0.046180   0.025739   0.008408
           0.007648   0.008107   0.007620   0.007476 [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 1.76e-07 3.31e-07 4.79e-07 1.48e-06 1.36e-06 2.47e-06   erg/cm2
              Error 3.79e-08 4.22e-08 8.43e-08 5.72e-07 2.01e-07 6.37e-07   erg/cm2
Peak flux Power-law 3.91e-01 3.26e-01 1.85e-01 1.55e-01 9.71e-01 1.06e+00   ph/cm2/s
              Error 1.10e-01 6.47e-02 5.92e-02 9.57e-02 1.92e-01 2.18e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.77e-07 3.31e-07 4.80e-07 1.46e-06 1.36e-06 2.37e-06   erg/cm2
              Error 3.79e-08 4.22e-08 8.45e-08 5.67e-07 2.01e-07 8.69e-07   erg/cm2
Peak flux Cutoff-PL 3.76e-01 3.56e-01 1.76e-01 5.35e-02 9.46e-01 9.61e-01   ph/cm2/s
              Error 1.17e-01 9.10e-02 8.20e-02 1.25e-01 1.98e-01 2.48e-01   ph/cm2/s
 
Fluence        Band 1.75e-07 3.30e-07 4.79e-07 1.46e-06 1.36e-06 2.16e-06   erg/cm2
              Error 3.75e-08 4.21e-08 8.43e-08 8.00e-07 1.53e-07 0.00e+00   erg/cm2
Peak flux      Band 3.68e-01 3.78e-01 1.64e-01 9.68e-02 9.63e-01 1.01e+00   ph/cm2/s
              Error 1.30e-01 9.20e-02 4.76e-02 5.48e-02 1.94e-01 2.28e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.466    0.234    -      -           1.02e-03 1.32e-04   65.722 57
CPL   1.408    0.000     520.6    0.0      1.09e-03 8.15e-04   65.860 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.819    0.361    -      -           6.99e-03 1.71e-03   58.510 57
CPL   1.127    1.743      49.0 5000.0      1.84e-02 4.25e-01   57.843  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: 121.216000 sec.
T50 in the 50-300 keV band: 80.384000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  140.252  -96.920   43.332
T90   119.660  -92.236   27.424
T50    69.000  -65.412    3.588
Peak    1.000    0.888    1.888

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
    8.2592 +19.4836 0.0214   25.7   85.1       2.1652     9.0  TRIG_00316534       
------------------------------------------
 
Foreground time interval of the image:
-96.920  43.332 (delta_t = 140.252 [sec])
Background time interval of the image:
-239.728 -96.920 (delta_t = 142.808 [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  -96.920 sec. to   43.332 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46631     ( -0.232331   0.236156 )
Norm@50keV  : 1.016929E-03    ( -1.325564E-04   1.306895E-04) )
------------------------------------------------------------
 Chi-Squared =      65.72200     using    59 PHA bins.
 Reduced chi-squared =      1.153018     for     57 degrees of freedom
 Null hypothesis probability = 0.200
 
Photon flux (15-150 keV)    in 140.3 sec: 0.125837 ( -0.015574  0.015601 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36071e-06 ( -1.98268e-07  2.03283e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -96.920 sec. to   43.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40839     (     )
Epeak [keV] : 520.581      (   )
Norm@50keV  : 1.086548E-03    ( -4.022591E-04   1.228574E-03) )
------------------------------------------------------------
 Chi-Squared =      65.86020     using    59 PHA bins.
 Reduced chi-squared =      1.176075     for     56 degrees of freedom
 Null hypothesis probability = 0.173
 
Photon flux (15-150 keV)    in 140.3 sec: 0.125789 ( -0.01557  0.015595 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.361e-06 ( -1.98626e-07  2.0301e-07 ) ergs/cm2
 
Band function
Time interval is from  -96.920 sec. to   43.332 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.985959   ( -2.18236   10.3472 )
beta        : -1.54163    ( -0.236398   0.232054 )
Epeak [keV] : 79.9913      ( -79.8913 9920.01 )
Norm@50keV   : 1.951225E-03    ( -1.804820E-02   1.775073E-02) )
------------------------------------------------------------
 Chi-Squared =      66.43231     using    59 PHA bins.
 Reduced chi-squared =      1.207860     for     55 degrees of freedom
 Null hypothesis probability = 0.139
 
Photon flux (15-150 keV)    in 140.3 sec: 2.41950 ( -2.4195  4351.64 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36027e-06 ( -1.03718e-07  2.02332e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.888 sec. to    1.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81936     ( -0.348313   0.374274 )
Norm@50keV  : 6.992909E-03    ( -1.737981E-03   1.682890E-03) )
------------------------------------------------------------
 Chi-Squared =      58.50969     using    59 PHA bins.
 Reduced chi-squared =      1.026486     for     57 degrees of freedom
 Null hypothesis probability = 0.420
 
Photon flux (15-150 keV)    in 1.000 sec: 0.970942 ( -0.19229  0.192298 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.42637e-08 ( -1.55487e-08  1.65194e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.888 sec. to    1.888 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12741     ( -2.51176   0.973556 )
Epeak [keV] : 49.0057      ( -48.9957 9950.99 )
Norm@50keV  : 1.844953E-02    ( -1.844953E-02   0.831502 )
------------------------------------------------------------
 Chi-Squared =      57.84293     using    59 PHA bins.
 but latest trial   2.03470     gives Chi-Squared =   1.16421
 Reduced chi-squared =      1.032910     for     56 degrees of freedom
 Null hypothesis probability = 0.407
 
Photon flux (15-150 keV)    in 1.000 sec: 0.946088 ( -0.1978  0.198382 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.82518e-08 ( -1.7937e-08  2.00299e-08 ) ergs/cm2
 
Band function
Time interval is from    0.888 sec. to    1.888 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.653931   ( -11.7105   3.28947 )
beta        : -2.12689    ( -1.26539   0.620940 )
Epeak [keV] : 37.0822      ( -31.1957 39.5650 )
Norm@50keV   : 4.238782E-02    ( -308.532   82.1465 )
------------------------------------------------------------
 Chi-Squared =      56.95712     using    59 PHA bins.
 Reduced chi-squared =      1.035584     for     55 degrees of freedom
 Null hypothesis probability = 0.402
 
Photon flux (15-150 keV)    in 1.000 sec: 0.962624 ( -0.192705  0.195606 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.99421e-08 ( -1.62188e-08  1.82442e-08 ) ergs/cm2
 
Plot creation:
Thu Jul 10 20:37:37 EDT 2008