batgrbproduct Analysis for Trigger=158855

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 15:43:07 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger158855/SDC
======================================================================

  Trigger: 00158855      Segment: 000

  BAT Trigger Time: 150482001.088   [s; MET]
      Trigger Stop: 150482002.112   [s; MET]
               UTC: 2005-10-08T16:33:21.316200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 202.870241770763   Dec: 42.0905012677457  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.65
     Image Trigger?:     NO
     Rate S/N Ratio:     17.1464281994822  [ if not an image trigger ]
     Image S/N Ratio:    9.65

  Flight Position:   [ source = BAT ]
    RA: 202.870241770763   Dec: 42.0905012677457  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 202.865180117416   Dec: 42.1001150222164  [deg; J2000]  
        { 13h 31m 27.6s , +42d 06' 00.4" }
         +/- 0.722839125965228 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.204995804920711 [arcmin] (formal 1-sigma fit error)
    SNR: 48.3601287503747
    RA  =  13h 31m 27.6s  (202.865180 deg.)
    Dec =  42d  6'  0" (42.100115 deg.)
 
  Angular difference between Flight and Ground position is 0.619283 arcmin
 
  Partial Coding Fraction: 0.375    [ including projection effects ]

  Duration
     T90: 12.4000000059605 +/- 1.30963811646047
        Measured from: -1.55599999427795
                   to: 10.8440000116825     [s; relative to TRIGTIME]
     T50: 4.74799999594688 +/- 0.414921660601174
        Measured from: 2.26399999856949
                   to: 7.01199999451637     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.8759999871254     
                   to: 3.8759999871254     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -24.9320000112057     
                   to: 13.2560000121593     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.199826   2.184693   2.493109   0.816529
           0.062452   0.059123   0.055328   0.045428 [error]
 Peak      0.117811   0.203475   0.249476   0.084477
           0.011774   0.012525   0.012951   0.010627 [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 4.42e-07 1.02e-06 1.87e-06 8.20e-06 5.09e-06 1.15e-05   erg/cm2
              Error 2.98e-08 4.05e-08 5.50e-08 5.84e-07 1.45e-07 0.00e+00   erg/cm2
Peak flux Power-law 1.25e+00 1.66e+00 1.61e+00 2.80e+00 5.44e+00 7.32e+00   ph/cm2/s
              Error 1.69e-01 1.34e-01 1.01e-01 3.93e-01 3.50e-01 4.59e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.02e-07 1.03e-06 1.94e-06 6.04e-06 5.06e-06 8.81e-06   erg/cm2
              Error 4.11e-08 4.20e-08 7.49e-08 1.39e-06 1.48e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 1.18e+00 1.67e+00 1.66e+00 2.34e+00 5.39e+00 6.80e+00   ph/cm2/s
              Error 2.22e-01 1.39e-01 1.36e-01 7.49e-01 3.62e-01 8.38e-01   ph/cm2/s
 
Fluence        Band 3.98e-07 1.02e-06 1.94e-06 6.03e-06 5.06e-06 9.15e-06   erg/cm2
              Error 4.07e-08 4.19e-08 7.50e-08 1.39e-06 1.48e-07 0.00e+00   erg/cm2
Peak flux      Band 1.17e+00 1.67e+00 1.66e+00 2.34e+00 5.39e+00 7.30e+00   ph/cm2/s
              Error 2.21e-01 1.39e-01 1.36e-01 7.49e-01 3.62e-01 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.126    0.054    -      -           1.29e-02 3.88e-04   54.969 57
CPL   0.832    0.228     253.1  300.3      1.68e-02 3.46e-03   49.791 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.041    0.110    -      -           4.71e-02 2.91e-03   52.104 57
CPL   0.849    0.373     373.2 5000.0      5.66e-02 2.10e-02   51.392 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: 16.512000 sec.
T50 in the 50-300 keV band: 5.312000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   38.188  -24.932   13.256
T90    12.400   -1.556   10.844
T50     4.748    2.264    7.012
Peak    1.000    2.876    3.876

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  202.8652 +42.1001 0.0040   44.0  -28.7       6.9376    48.4  TRIG_00158855       
------------------------------------------
 
Foreground time interval of the image:
-24.932  13.256 (delta_t =  38.188 [sec])
Background time interval of the image:
-299.088 -24.932 (delta_t = 274.156 [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  -24.932 sec. to   13.256 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12603     ( -5.395854E-02   5.346012E-02) )
Norm@50keV  : 1.285889E-02    ( -3.887862E-04   3.871806E-04) )
------------------------------------------------------------
 Chi-Squared =      54.96866     using    59 PHA bins.
 Reduced chi-squared =     0.9643624     for     57 degrees of freedom
 Null hypothesis probability = 0.552
 
Photon flux (15-150 keV)    in 38.19 sec: 1.49553 ( -0.04895  0.04917 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0926e-06 ( -1.4474e-07  1.44702e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -24.932 sec. to   13.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.831601     ( -0.235341   0.221154 )
Epeak [keV] : 253.098      ( -83.8625 516.785 )
Norm@50keV  : 1.681909E-02    ( -3.021063E-03   3.893271E-03) )
------------------------------------------------------------
 Chi-Squared =      49.79086     using    59 PHA bins.
 Reduced chi-squared =     0.8891225     for     56 degrees of freedom
 Null hypothesis probability = 0.708
 
Photon flux (15-150 keV)    in 38.19 sec: 1.46767 ( -0.05251  0.05279 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0601e-06 ( -1.4875e-07  1.47566e-07 ) ergs/cm2
 
Band function
Time interval is from  -24.932 sec. to   13.256 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.831177   ( -0.222097   0.234946 )
beta        : -8.95201    ( -1.04799   7.76632 )
Epeak [keV] : 252.781      ( -83.5115 516.404 )
Norm@50keV   : 1.682481E-02    ( -3.028389E-03   3.887506E-03) )
------------------------------------------------------------
 Chi-Squared =      49.79103     using    59 PHA bins.
 Reduced chi-squared =     0.9052914     for     55 degrees of freedom
 Null hypothesis probability = 0.673
 
Photon flux (15-150 keV)    in 38.19 sec: 1.46770 ( -0.05254  0.05289 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.05651e-06 ( -1.48712e-07  1.48101e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    2.876 sec. to    3.876 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04099     ( -0.110884   0.109152 )
Norm@50keV  : 4.713099E-02    ( -2.919819E-03   2.905019E-03) )
------------------------------------------------------------
 Chi-Squared =      52.10406     using    59 PHA bins.
 Reduced chi-squared =     0.9141062     for     57 degrees of freedom
 Null hypothesis probability = 0.659
 
Photon flux (15-150 keV)    in 1.000 sec: 5.44000 ( -0.34997  0.35048 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.02412e-07 ( -3.1481e-08  3.1632e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.876 sec. to    3.876 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.849306     ( -0.465940   0.281029 )
Epeak [keV] : 373.181      ( -373.171 9626.82 )
Norm@50keV  : 5.656968E-02    ( -1.170466E-02   3.021274E-02) )
------------------------------------------------------------
 Chi-Squared =      51.39235     using    59 PHA bins.
 Reduced chi-squared =     0.9177206     for     56 degrees of freedom
 Null hypothesis probability = 0.650
 
Photon flux (15-150 keV)    in 1.000 sec: 5.39192 ( -0.36074  0.3624 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.00863e-07 ( -3.149e-08  3.1953e-08 ) ergs/cm2
 
Band function
Time interval is from    2.876 sec. to    3.876 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.840572   ( -9.15943   5.83846 )
beta        : -1.04099    ( -0.109132   0.110884 )
Epeak [keV] : 57.1056      ( -57.0056 9942.89 )
Norm@50keV   : 7.971886E-02    ( -1.52549   1139.43 )
------------------------------------------------------------
 Chi-Squared =      52.10406     using    59 PHA bins.
 Reduced chi-squared =     0.9473465     for     55 degrees of freedom
 Null hypothesis probability = 0.586
 
Photon flux (15-150 keV)    in 1.000 sec: 5.39215 ( -0.36161  0.36296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.00527e-07 ( -3.2094e-08  3.1997e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  9 15:51:29 EST 2008