batgrbproduct Analysis for Trigger=313417

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sat Jun  7 12:58:18 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger313417/GCN5_download_cron
======================================================================

  Trigger: 00313417      Segment: 000

  BAT Trigger Time: 234511649.856   [s; MET]
      Trigger Stop: 234511650.88   [s; MET]
               UTC: 2008-06-07T06:07:27.008340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 194.967287472106   Dec: 15.9004689525493  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    17.87
     Image Trigger?:     NO
     Rate S/N Ratio:     238.88490952758  [ if not an image trigger ]
     Image S/N Ratio:    17.87

  Flight Position:   [ source = BAT ]
    RA: 194.967287472106   Dec: 15.9004689525493  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 194.963647094787   Dec: 15.9103862910476  [deg; J2000]  
        { 12h 59m 51.3s , +15d 54' 37.4" }
         +/- 0.892601097820795 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.277722519996961 [arcmin] (formal 1-sigma fit error)
    SNR: 35.7773183000384
 
  Angular difference between Flight and Ground position is 0.631030 arcmin
 
  Partial Coding Fraction: 0.1113281    [ including projection effects ]

  Duration
     T90: 79.4280000030994 +/- 3.28506192878632
        Measured from: -2.97600001096725
                   to: 76.4519999921322     [s; relative to TRIGTIME]
     T50: 22.5200000107288 +/- 1.7563826490842
        Measured from: 1.7039999961853
                   to: 24.2240000069141     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.50400000810623     
                   to: 2.50400000810623     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.91200000047684     
                   to: 183.699999988079     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     8.137451  11.903328  11.162140   3.729998
           0.137487   0.159093   0.160776   0.124898 [error]
 Peak      0.412212   0.900857   1.152068   0.443178
           0.029165   0.039542   0.047851   0.036305 [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 2.67e-06 5.49e-06 8.82e-06 3.17e-05 2.44e-05 4.86e-05   erg/cm2
              Error 1.21e-07 1.42e-07 1.81e-07 1.62e-06 4.64e-07 1.65e-06   erg/cm2
Peak flux Power-law 4.59e+00 6.70e+00 7.29e+00 1.49e+01 2.31e+01 3.34e+01   ph/cm2/s
              Error 4.53e-01 4.02e-01 3.59e-01 1.60e+00 1.09e+00 1.79e+00   ph/cm2/s
 
Fluence   Cutoff-PL 2.66e-06 5.50e-06 8.84e-06 3.09e-05 2.44e-05 4.58e-05   erg/cm2
              Error 1.59e-07 1.41e-07 2.19e-07 3.47e-06 4.84e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 4.28e+00 6.79e+00 7.57e+00 1.18e+01 2.30e+01 3.05e+01   ph/cm2/s
              Error 4.34e-01 4.27e-01 4.93e-01 3.45e+00 1.09e+00 3.36e+00   ph/cm2/s
 
Fluence        Band 2.64e-06 5.47e-06 8.82e-06 3.11e-05 2.44e-05 4.58e-05   erg/cm2
              Error 1.20e-07 1.42e-07 2.21e-07 3.65e-06 4.86e-07 0.00e+00   erg/cm2
Peak flux      Band 4.28e+00 6.79e+00 7.57e+00 1.18e+01 2.30e+01 3.04e+01   ph/cm2/s
              Error 5.83e-01 4.27e-01 4.96e-01 3.45e+00 1.10e+00 3.54e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.317    0.038    -      -           1.31e-02 2.56e-04   33.960 57
CPL   1.312    0.038    9982.3 4848.1      1.32e-02 1.88e-04   33.931  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.877    0.081    -      -           2.02e-01 9.53e-03   47.490 57
CPL   0.621    0.316     326.6 4911.6      2.60e-01 8.00e-02   45.633 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: 52.672000 sec.
T50 in the 50-300 keV band: 6.336000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  189.612   -5.912  183.700
T90    79.428   -2.976   76.452
T50    22.520    1.704   24.224
Peak    1.000    1.504    2.504

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  194.9636 +15.9104 0.0054   40.5  123.2      24.9615    35.8  TRIG_00313417       
------------------------------------------
 
Foreground time interval of the image:
 -5.912  11.145 (delta_t =  17.057 [sec])
Background time interval of the image:
-239.856  -5.912 (delta_t = 233.944 [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   -5.912 sec. to  183.700 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31652     ( -3.807127E-02   3.798485E-02) )
Norm@50keV  : 1.309992E-02    ( -2.568522E-04   2.561333E-04) )
------------------------------------------------------------
 Chi-Squared =      33.95990     using    59 PHA bins.
 Reduced chi-squared =     0.5957878     for     57 degrees of freedom
 Null hypothesis probability = 0.993
 
Photon flux (15-150 keV)    in 189.6 sec: 1.56771 ( -0.03566  0.03583 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.44463e-05 ( -4.63762e-07  4.64141e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -5.912 sec. to  183.700 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31216     ( -3.835452E-02   3.826308E-02) )
Epeak [keV] : 9982.31      ( -9678.61 17.6943 )
Norm@50keV  : 1.315282E-02    ( -2.486128E-04   1.282832E-04) )
------------------------------------------------------------
 Chi-Squared =      33.93060     using    59 PHA bins.
 but latest trial  1.290418E-02 gives Chi-Squared =   2.53511
 but latest trial  1.340917E-02 gives Chi-Squared =   2.92144
 Reduced chi-squared =     0.6059035     for     56 degrees of freedom
 Null hypothesis probability = 0.991
 
Photon flux (15-150 keV)    in 189.6 sec: 1.56668 ( -0.03563  0.0358 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.44375e-05 ( -4.93529e-07  4.7381e-07 ) ergs/cm2
 
Band function
Time interval is from   -5.912 sec. to  183.700 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01615   ( -0.178761   14.3365 )
beta        : -1.31621    ( -3.798366E-02   3.807354E-02) )
Epeak [keV] : 46.7332      ( -46.6332 9953.27 )
Norm@50keV   : 2.580578E-02    ( -3.487575E-02   3.480530E-02) )
------------------------------------------------------------
 Chi-Squared =      33.97573     using    59 PHA bins.
 Reduced chi-squared =     0.6177406     for     55 degrees of freedom
 Null hypothesis probability = 0.988
 
Photon flux (15-150 keV)    in 189.6 sec: 1.56762 ( -0.02945  0.01794 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.4419e-05 ( -4.98079e-07  4.73621e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.504 sec. to    2.504 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.877457     ( -8.147299E-02   8.060765E-02) )
Norm@50keV  : 0.201676    ( -9.553537E-03   9.509787E-03) )
------------------------------------------------------------
 Chi-Squared =      47.49039     using    59 PHA bins.
 Reduced chi-squared =     0.8331648     for     57 degrees of freedom
 Null hypothesis probability = 0.811
 
Photon flux (15-150 keV)    in 1.000 sec: 23.1461 ( -1.0919  1.0924 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.28343e-06 ( -1.15306e-07  1.15518e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.504 sec. to    2.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.620566     ( -0.333376   0.298239 )
Epeak [keV] : 326.630      ( -149.834 9673.37 )
Norm@50keV  : 0.259987    ( -6.259866E-02   9.743842E-02) )
------------------------------------------------------------
 Chi-Squared =      45.63282     using    59 PHA bins.
 Reduced chi-squared =     0.8148717     for     56 degrees of freedom
 Null hypothesis probability = 0.837
 
Photon flux (15-150 keV)    in 1.000 sec: 23.0409 ( -1.0828  1.0952 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.27828e-06 ( -1.1774e-07  1.17254e-07 ) ergs/cm2
 
Band function
Time interval is from    1.504 sec. to    2.504 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.805518   ( -14.9992   8.049011E-04) )
beta        : -0.877465    ( -8.084327E-02   8.170104E-02) )
Epeak [keV] : 18.0751      ( -17.9786 9981.91 )
Norm@50keV   : 0.285428    ( -6257.63   2.025762E+07) )
------------------------------------------------------------
 Chi-Squared =      47.49041     using    59 PHA bins.
 Reduced chi-squared =     0.8634619     for     55 degrees of freedom
 Null hypothesis probability = 0.754
 
Photon flux (15-150 keV)    in 1.000 sec: 23.0413 ( -1.0985  1.0994 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.27678e-06 ( -1.17599e-07  1.17374e-07 ) ergs/cm2
 
Plot creation:
Sat Jun  7 13:31:11 EDT 2008