batgrbproduct Analysis for Trigger=336489

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Wed Dec  3 19:42:41 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger336489/GCN5_download_cron
======================================================================

  Trigger: 00336489      Segment: 000

  BAT Trigger Time: 250005434.88   [s; MET]
      Trigger Stop: 250005435.904   [s; MET]
               UTC: 2008-12-03T13:57:11.575340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 233.033331525279   Dec: 63.4983389938113  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.56
     Image Trigger?:     NO
     Rate S/N Ratio:     14.5258390463339  [ if not an image trigger ]
     Image S/N Ratio:    7.56

  Flight Position:   [ source = BAT ]
    RA: 233.033331525279   Dec: 63.4983389938113  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 233.070412007788   Dec: 63.5139701039704  [deg; J2000]  
        { 15h 32m 16.9s , +63d 30' 50.3" }
         +/- 1.12001701544633 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.37051563861651 [arcmin] (formal 1-sigma fit error)
    SNR: 25.870063423671
 
  Angular difference between Flight and Ground position is 1.365522 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 221 +/- 82.9698740507662
        Measured from: -14.8799999058247
                   to: 206.120000094175     [s; relative to TRIGTIME]
     T50: 41 +/- 4.12310562561766
        Measured from: 9.12000009417534
                   to: 50.1200000941753     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 31.1200000047684     
                   to: 32.1200000047684     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -68.8799999952316     
                   to: 405.120000004768     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.264062   4.438475   3.374051   0.790195
           0.115523   0.117223   0.104651   0.090978 [error]
 Peak      0.073032   0.126437   0.117164   0.034840
           0.007394   0.008183   0.007822   0.006191 [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 1.07e-06 1.92e-06 2.65e-06 7.60e-06 7.63e-06 1.32e-05   erg/cm2
              Error 6.76e-08 7.00e-08 1.06e-07 6.97e-07 2.58e-07 7.54e-07   erg/cm2
Peak flux Power-law 8.02e-01 9.18e-01 7.54e-01 1.04e+00 2.85e+00 3.51e+00   ph/cm2/s
              Error 1.02e-01 7.24e-02 6.15e-02 1.74e-01 2.04e-01 2.54e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.03e-06 1.94e-06 2.68e-06 6.15e-06 7.55e-06 1.17e-05   erg/cm2
              Error 8.45e-08 5.71e-08 1.17e-07 1.79e-06 2.82e-07 1.81e-06   erg/cm2
Peak flux Cutoff-PL 7.00e-01 9.68e-01 8.07e-01 5.48e-01 2.78e+00 3.02e+00   ph/cm2/s
              Error 1.23e-01 8.44e-02 7.42e-02 2.56e-01 2.09e-01 3.26e-01   ph/cm2/s
 
Fluence        Band 1.01e-06 1.94e-06 2.66e-06 6.95e-06 7.54e-06 1.26e-05   erg/cm2
              Error 9.74e-08 8.72e-08 1.27e-07 1.76e-06 2.86e-07 1.25e-06   erg/cm2
Peak flux      Band 7.00e-01 9.68e-01 8.07e-01 5.48e-01 2.78e+00 3.02e+00   ph/cm2/s
              Error 1.23e-01 8.45e-02 7.42e-02 2.56e-01 2.09e-01 3.27e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.536    0.061    -      -           1.71e-03 5.46e-05   47.075 57
CPL   1.313    0.000     167.4 4942.1      2.16e-03 4.73e-04   46.116  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.283    0.116    -      -           2.40e-02 1.67e-03   57.470 57
CPL   0.630    0.505     111.3   85.4      4.95e-02 2.92e-02   51.717 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: 77.952000 sec.
T50 in the 50-300 keV band: 28.800000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  474.000  -68.880  405.120
T90   221.000  -14.880  206.120
T50    41.000    9.120   50.120
Peak    1.000   31.120   32.120

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  233.0704 +63.5140 0.0074   35.7  167.4       3.7530    25.9  TRIG_00336489       
------------------------------------------
 
Foreground time interval of the image:
-68.880  14.921 (delta_t =  83.801 [sec])
Background time interval of the image:
-239.880 -68.880 (delta_t = 171.000 [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
Multiple GTIs in the spectrum
tstart tstop
-68.880000 295.060000
296.120000 405.120000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53555     ( -6.072295E-02   6.085098E-02) )
Norm@50keV  : 1.709707E-03    ( -5.460938E-05   5.459320E-05) )
------------------------------------------------------------
 Chi-Squared =      47.07484     using    59 PHA bins.
 Reduced chi-squared =     0.8258743     for     57 degrees of freedom
 Null hypothesis probability = 0.823
 
Photon flux (15-150 keV)    in 472.9 sec: 0.215545 ( -0.007578  0.007605 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.62769e-06 ( -2.57305e-07  2.58062e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-68.880000 295.060000
296.120000 405.120000
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31314     (     )
Epeak [keV] : 167.399      ( -153.500 9730.59 )
Norm@50keV  : 2.159724E-03    ( -2.638673E-04   6.813150E-04) )
------------------------------------------------------------
 Chi-Squared =      46.11646     using    59 PHA bins.
 but latest trial   115.849     gives Chi-Squared =   16.3775
 Reduced chi-squared =     0.8235082     for     56 degrees of freedom
 Null hypothesis probability = 0.824
 
Photon flux (15-150 keV)    in 472.9 sec: 0.213077 ( -0.008364  0.008214 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.55165e-06 ( -2.84922e-07  2.79342e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-68.880000 295.060000
296.120000 405.120000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01720   ( -8.98280   1.27735 )
beta        : -1.60448    ( -7.53319   0.976595 )
Epeak [keV] : 75.4693      ( -197.492 471.412 )
Norm@50keV   : 3.345868E-03    ( -3.042615E-04   6.314355E-04) )
------------------------------------------------------------
 Chi-Squared =      46.24490     using    59 PHA bins.
 Reduced chi-squared =     0.8408163     for     55 degrees of freedom
 Null hypothesis probability = 0.794
 
Photon flux (15-150 keV)    in 472.9 sec: 0.212682 ( -0.008915  0.008657 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.54124e-06 ( -2.86388e-07  2.85537e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   31.120 sec. to   32.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28346     ( -0.116029   0.115699 )
Norm@50keV  : 2.396900E-02    ( -1.667935E-03   1.667578E-03) )
------------------------------------------------------------
 Chi-Squared =      57.47043     using    59 PHA bins.
 Reduced chi-squared =      1.008253     for     57 degrees of freedom
 Null hypothesis probability = 0.458
 
Photon flux (15-150 keV)    in 1.000 sec: 2.85103 ( -0.20338  0.20364 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37782e-07 ( -1.8196e-08  1.837e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   31.120 sec. to   32.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.630185     ( -0.535383   0.474410 )
Epeak [keV] : 111.347      ( -28.6633 142.181 )
Norm@50keV  : 4.949409E-02    ( -1.985466E-02   3.850568E-02) )
------------------------------------------------------------
 Chi-Squared =      51.71739     using    59 PHA bins.
 Reduced chi-squared =     0.9235249     for     56 degrees of freedom
 Null hypothesis probability = 0.638
 
Photon flux (15-150 keV)    in 1.000 sec: 2.78407 ( -0.20924  0.2092 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29226e-07 ( -1.9452e-08  1.9752e-08 ) ergs/cm2
 
Band function
Time interval is from   31.120 sec. to   32.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.629262   ( -0.475332   0.534607 )
beta        : -9.26378    ( -0.736221   7.96574 )
Epeak [keV] : 111.236      ( -28.5974 142.563 )
Norm@50keV   : 4.954655E-02    ( -1.990646E-02   3.847365E-02) )
------------------------------------------------------------
 Chi-Squared =      51.71737     using    59 PHA bins.
 Reduced chi-squared =     0.9403158     for     55 degrees of freedom
 Null hypothesis probability = 0.601
 
Photon flux (15-150 keV)    in 1.000 sec: 2.78396 ( -0.20913  0.20937 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29299e-07 ( -1.9621e-08  1.9516e-08 ) ergs/cm2
 
Plot creation:
Wed Dec  3 19:59:56 EST 2008