batgrbproduct Analysis for Trigger=231362

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 06:49:20 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger231362/SDC
======================================================================

  Trigger: 00231362      Segment: 000

  BAT Trigger Time: 181058856.768   [s; MET]
      Trigger Stop: 181058857.024   [s; MET]
               UTC: 2006-09-27T14:07:35.297340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 329.55252602015   Dec: 5.35273339381842  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.06
     Image Trigger?:     NO
     Rate S/N Ratio:     32.1403173599764  [ if not an image trigger ]
     Image S/N Ratio:    12.06

  Flight Position:   [ source = BAT ]
    RA: 329.55252602015   Dec: 5.35273339381842  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 329.553390820988   Dec: 5.36481070497339  [deg; J2000]  
        { 21h 58m 12.8s , +05d 21' 53.3" }
         +/- 0.893793559286184 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.221093290972256 [arcmin] (formal 1-sigma fit error)
    SNR: 35.7091483983897
    RA  =  21h 58m 12.8s  (329.553391 deg.)
    Dec =   5d 21' 53" (5.364811 deg.)
 
  Angular difference between Flight and Ground position is 0.726478 arcmin
 
  Partial Coding Fraction: 0.8203125    [ including projection effects ]

  Duration
     T90: 22.5439999997616 +/- 1.29427663430184
        Measured from: -0.0879999995231628
                   to: 22.4560000002384     [s; relative to TRIGTIME]
     T50: 15.8120000064373 +/- 5.23756429156354
        Measured from: 1.0639999806881
                   to: 16.8759999871254     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.167999982833862     
                   to: 1.16799998283386     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.976000010967255     
                   to: 23.7520000040531     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.566850   0.835548   0.503177   0.065176
           0.026650   0.027630   0.024567   0.020697 [error]
 Peak      0.070481   0.129684   0.124662   0.029758
           0.006111   0.007091   0.006755   0.004988 [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 1.90e-07 3.19e-07 4.07e-07 1.04e-06 1.20e-06 1.96e-06   erg/cm2
              Error 1.46e-08 1.46e-08 2.44e-08 1.35e-07 5.79e-08 1.53e-07   erg/cm2
Peak flux Power-law 6.64e-01 8.53e-01 8.02e-01 1.33e+00 2.76e+00 3.65e+00   ph/cm2/s
              Error 7.76e-02 6.11e-02 5.26e-02 1.85e-01 1.68e-01 2.32e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.69e-07 3.41e-07 4.18e-07 3.89e-07 1.13e-06 1.31e-06   erg/cm2
              Error 1.78e-08 1.84e-08 2.73e-08 1.77e-07 6.78e-08 1.87e-07   erg/cm2
Peak flux Cutoff-PL 5.52e-01 8.95e-01 8.78e-01 6.90e-01 2.70e+00 3.02e+00   ph/cm2/s
              Error 9.67e-02 6.99e-02 6.93e-02 2.54e-01 1.72e-01 3.01e-01   ph/cm2/s
 
Fluence        Band 1.61e-07 3.49e-07 3.97e-07 7.33e-07 1.14e-06 1.62e-06   erg/cm2
              Error 1.89e-08 1.93e-08 3.15e-08 3.05e-07 6.48e-08 3.15e-07   erg/cm2
Peak flux      Band 5.52e-01 8.95e-01 8.78e-01 6.91e-01 2.70e+00 3.02e+00   ph/cm2/s
              Error 9.67e-02 6.99e-02 6.93e-02 2.54e-01 1.72e-01 3.01e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.649    0.081    -      -           5.24e-03 2.37e-04   70.451 57
CPL   0.919    0.378      72.0   17.6      1.23e-02 5.68e-03   57.516 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.090    0.100    -      -           2.39e-02 1.41e-03   65.532 57
CPL   0.339    0.462     125.4   60.5      5.23e-02 2.58e-02   56.278 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: 22.976000 sec.
T50 in the 50-300 keV band: 5.888000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   24.728   -0.976   23.752
T90    22.544   -0.088   22.456
T50    15.812    1.064   16.876
Peak    1.000    0.168    1.168

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  329.5534  +5.3648 0.0054   16.6  -97.7       1.4764    35.7  TRIG_00231362       
------------------------------------------
 
Foreground time interval of the image:
 -0.976  13.237 (delta_t =  14.213 [sec])
Background time interval of the image:
-239.768  -0.976 (delta_t = 238.792 [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   -0.976 sec. to   23.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64916     ( -8.025515E-02   8.074760E-02) )
Norm@50keV  : 5.238645E-03    ( -2.372428E-04   2.363506E-04) )
------------------------------------------------------------
 Chi-Squared =      70.45123     using    59 PHA bins.
 Reduced chi-squared =      1.235986     for     57 degrees of freedom
 Null hypothesis probability = 0.109
 
Photon flux (15-150 keV)    in 24.73 sec: 0.683849 ( -0.031218  0.031285 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20493e-06 ( -5.77e-08  5.80809e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.976 sec. to   23.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.919249     ( -0.394862   0.360644 )
Epeak [keV] : 72.0090      ( -10.6585 24.5726 )
Norm@50keV  : 1.234673E-02    ( -4.195572E-03   7.172773E-03) )
------------------------------------------------------------
 Chi-Squared =      57.51606     using    59 PHA bins.
 Reduced chi-squared =      1.027072     for     56 degrees of freedom
 Null hypothesis probability = 0.419
 
Photon flux (15-150 keV)    in 24.73 sec: 0.656058 ( -0.033811  0.033865 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.13352e-06 ( -6.79383e-08  6.76118e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.976 sec. to   23.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.673647E-02   ( -0.990770   1.79648 )
beta        : -1.94825    ( -0.945533   0.178137 )
Epeak [keV] : 47.3727      ( -11.7346 31.2289 )
Norm@50keV   : 4.240099E-02    ( -3.204604E-02   0.758353 )
------------------------------------------------------------
 Chi-Squared =      55.11765     using    59 PHA bins.
 Reduced chi-squared =      1.002139     for     55 degrees of freedom
 Null hypothesis probability = 0.470
 
Photon flux (15-150 keV)    in 24.73 sec: 0.652524 ( -0.035149  0.033087 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14478e-06 ( -6.58807e-08  6.37267e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.168 sec. to    1.168 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09008     ( -0.100892   9.989464E-02) )
Norm@50keV  : 2.385785E-02    ( -1.414252E-03   1.413595E-03) )
------------------------------------------------------------
 Chi-Squared =      65.53246     using    59 PHA bins.
 Reduced chi-squared =      1.149692     for     57 degrees of freedom
 Null hypothesis probability = 0.205
 
Photon flux (15-150 keV)    in 1.000 sec: 2.76477 ( -0.16811  0.16825 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.50232e-07 ( -1.6159e-08  1.6256e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.168 sec. to    1.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.339320     ( -0.485682   0.437394 )
Epeak [keV] : 125.354      ( -28.6024 92.3369 )
Norm@50keV  : 5.232307E-02    ( -1.880931E-02   3.286796E-02) )
------------------------------------------------------------
 Chi-Squared =      56.27751     using    59 PHA bins.
 Reduced chi-squared =      1.004956     for     56 degrees of freedom
 Null hypothesis probability = 0.464
 
Photon flux (15-150 keV)    in 1.000 sec: 2.70191 ( -0.17241  0.17235 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.43437e-07 ( -1.7227e-08  1.7202e-08 ) ergs/cm2
 
Band function
Time interval is from    0.168 sec. to    1.168 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.341182   ( -0.435527   0.488360 )
beta        : -8.79810    ( -1.20190   5.82416 )
Epeak [keV] : 125.533      ( -28.8021 92.1022 )
Norm@50keV   : 5.221637E-02    ( -1.870509E-02   3.299355E-02) )
------------------------------------------------------------
 Chi-Squared =      56.27760     using    59 PHA bins.
 Reduced chi-squared =      1.023229     for     55 degrees of freedom
 Null hypothesis probability = 0.427
 
Photon flux (15-150 keV)    in 1.000 sec: 2.70210 ( -0.17257  0.17225 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.43311e-07 ( -1.7225e-08  1.7182e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 07:13:48 EST 2008