batgrbproduct Analysis for Trigger=239899

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 12:54:20 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger239899/GCN5_download_cron
======================================================================

  Trigger: 00239899      Segment: 000

  BAT Trigger Time: 185815350.592   [s; MET]
      Trigger Stop: 185815350.848   [s; MET]
               UTC: 2006-11-21T15:22:29.006780    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 147.251722976049   Dec: -13.1827450313483  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.08
     Image Trigger?:     NO
     Rate S/N Ratio:     16.7928556237467  [ if not an image trigger ]
     Image S/N Ratio:    8.08

  Flight Position:   [ source = BAT ]
    RA: 147.251722976049   Dec: -13.1827450313483  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 147.232892235962   Dec: -13.1849860608288  [deg; J2000]  
        { 09h 48m 55.9s , -13d 11' 05.9" }
         +/- 0.905731522563441 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.284017634922518 [arcmin] (formal 1-sigma fit error)
    SNR: 35.0386762313259
    RA  =   9h 48m 55.9s  (147.232892 deg.)
    Dec = -13d 11'  6" (-13.184986 deg.)
 
  Angular difference between Flight and Ground position is 1.108252 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 81.2480000257492 +/- 46.1274845779442
        Measured from: 8.8759999871254
                   to: 90.1240000128746     [s; relative to TRIGTIME]
     T50: 7.4839999973774 +/- 0.109251996718258
        Measured from: 67.6920000016689
                   to: 75.1759999990463     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 74.4799999892712     
                   to: 75.4799999892712     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.84400001168251     
                   to: 121.447999984026     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.134245   8.045967   6.432284   1.635837
           0.059839   0.062962   0.056632   0.044268 [error]
 Peak      0.595545   0.939479   0.973363   0.289990
           0.011050   0.013765   0.014651   0.010840 [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 1.64e-06 3.23e-06 4.96e-06 1.66e-05 1.39e-05 2.65e-05   erg/cm2
              Error 6.10e-08 6.88e-08 7.68e-08 6.60e-07 2.01e-07 6.59e-07   erg/cm2
Peak flux Power-law 4.79e+00 6.39e+00 6.28e+00 1.11e+01 2.11e+01 2.85e+01   ph/cm2/s
              Error 2.34e-01 1.82e-01 1.31e-01 5.52e-01 4.57e-01 5.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.59e-06 3.23e-06 5.00e-06 1.54e-05 1.38e-05 2.45e-05   erg/cm2
              Error 9.13e-08 6.93e-08 1.00e-07 1.84e-06 2.00e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 4.77e+00 6.39e+00 6.28e+00 1.10e+01 2.11e+01 2.84e+01   ph/cm2/s
              Error 2.34e-01 1.82e-01 1.31e-01 5.50e-01 4.57e-01 5.93e-01   ph/cm2/s
 
Fluence        Band 1.58e-06 3.22e-06 4.99e-06 1.54e-05 1.38e-05 2.43e-05   erg/cm2
              Error 9.04e-08 6.90e-08 1.01e-07 1.84e-06 2.13e-07 0.00e+00   erg/cm2
Peak flux      Band 4.59e+00 6.38e+00 6.37e+00 9.98e+00 2.09e+01 2.73e+01   ph/cm2/s
              Error 3.51e-01 1.84e-01 1.81e-01 1.38e+00 5.08e-01 1.54e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.382    0.031    -      -           1.17e-02 1.82e-04   28.059 57
CPL   1.298    0.105     529.2 5000.0      1.26e-02 1.04e-03   27.174  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.026    0.040    -      -           1.83e-01 3.79e-03   38.252 57
CPL   0.927    0.161     691.7 5000.0      2.00e-01 2.35e-02   36.815  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: 27.648000 sec.
T50 in the 50-300 keV band: 7.104000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  122.292   -0.844  121.448
T90    81.248    8.876   90.124
T50     7.484   67.692   75.176
Peak    1.000   74.480   75.480

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  147.2329 -13.1850 0.0055    9.0  166.2       1.1797    35.0  TRIG_00239899       
------------------------------------------
 
Foreground time interval of the image:
 -0.844  10.809 (delta_t =  11.653 [sec])
Background time interval of the image:
-239.592  -0.844 (delta_t = 238.748 [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   -0.844 sec. to  121.448 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38241     ( -3.059828E-02   3.054070E-02) )
Norm@50keV  : 1.169739E-02    ( -1.825318E-04   1.819981E-04) )
------------------------------------------------------------
 Chi-Squared =      28.05898     using    59 PHA bins.
 Reduced chi-squared =     0.4922628     for     57 degrees of freedom
 Null hypothesis probability = 1.000
 
Photon flux (15-150 keV)    in 122.3 sec: 1.41895 ( -0.02703  0.02719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38738e-05 ( -2.00694e-07  2.00939e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.844 sec. to  121.448 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29799     ( -0.122436   8.717859E-02) )
Epeak [keV] : 529.166      ( -529.156 9470.83 )
Norm@50keV  : 1.261601E-02    ( -6.621489E-04   1.423246E-03) )
------------------------------------------------------------
 Chi-Squared =      27.17429     using    59 PHA bins.
 but latest trial   1.38148     gives Chi-Squared =  0.886673
 but latest trial  1.196554E-02 gives Chi-Squared =   3.57949
 Reduced chi-squared =     0.4852552     for     56 degrees of freedom
 Null hypothesis probability = 1.000
 
Photon flux (15-150 keV)    in 122.3 sec: 1.40779 ( -0.01673  0.01672 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38286e-05 ( -1.99961e-07  1.99961e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.844 sec. to  121.448 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.09109   ( -8.90891   6.08388 )
beta        : -1.38242    ( -3.052974E-02   3.061426E-02) )
Epeak [keV] : 41.6278      ( -4.33398 0.374023 )
Norm@50keV   : 2.300161E-02    ( -1.822077E-04   1.818361E-04) )
------------------------------------------------------------
 Chi-Squared =      28.05901     using    59 PHA bins.
 Reduced chi-squared =     0.5101637     for     55 degrees of freedom
 Null hypothesis probability = 0.999
 
Photon flux (15-150 keV)    in 122.3 sec: 1.41870 ( -0.0229  0.0205 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38178e-05 ( -2.20018e-07  2.05709e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   74.480 sec. to   75.480 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02596     ( -4.014337E-02   4.003179E-02) )
Norm@50keV  : 0.182785    ( -3.794104E-03   3.780410E-03) )
------------------------------------------------------------
 Chi-Squared =      38.25178     using    59 PHA bins.
 Reduced chi-squared =     0.6710839     for     57 degrees of freedom
 Null hypothesis probability = 0.973
 
Photon flux (15-150 keV)    in 1.000 sec: 21.0754 ( -0.4559  0.4583 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95868e-06 ( -4.0707e-08  4.0882e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   74.480 sec. to   75.480 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 0.926503     ( -0.195631   0.126224 )
Epeak [keV] : 691.727      ( -691.717 9308.27 )
Norm@50keV  : 0.199908    ( -9.312406E-03   3.768179E-02) )
------------------------------------------------------------
 Chi-Squared =      36.81542     using    59 PHA bins.
 but latest trial   1.02384     gives Chi-Squared =   1.31250
 but latest trial  0.190594     gives Chi-Squared =  0.735325
 Reduced chi-squared =     0.6574182     for     56 degrees of freedom
 Null hypothesis probability = 0.978
 
Photon flux (15-150 keV)    in 1.000 sec: 21.0654 ( -0.4561  0.4579 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95222e-06 ( -4.2437e-08  4.1259e-08 ) ergs/cm2
 
Band function
Time interval is from   74.480 sec. to   75.480 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.827129   ( -9.17287   5.82253 )
beta        : -1.02596    ( -4.002881E-02   4.014724E-02) )
Epeak [keV] : 55.2221      ( -9999.89 7.812500E-03) )
Norm@50keV   : 0.311149    ( -3.796637E-03   3.785536E-03) )
------------------------------------------------------------
 Chi-Squared =      38.25179     using    59 PHA bins.
 Reduced chi-squared =     0.6954871     for     55 degrees of freedom
 Null hypothesis probability = 0.958
 
Photon flux (15-150 keV)    in 1.000 sec: 20.9045 ( -0.5088  0.5065 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95081e-06 ( -4.2423e-08  4.2128e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 13:13:13 EST 2008