batgrbproduct Analysis for Trigger=332851

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Oct 28 11:21:34 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger332851/GCN5_download_cron
======================================================================

  Trigger: 00332851      Segment: 000

  BAT Trigger Time: 246846304   [s; MET]
      Trigger Stop: 246846432   [s; MET]
               UTC: 2008-10-28T00:25:00.790760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 121.890264700736   Dec: 2.31110706505449  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    17.95
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    17.95

  Flight Position:   [ source = BAT ]
    RA: 121.890264700736   Dec: 2.31110706505449  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 121.893083962888   Dec: 2.3048737328124  [deg; J2000]  
        { 08h 07m 34.3s , +02d 18' 17.5" }
         +/- 1.18137660879881 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.596195126066878 [arcmin] (formal 1-sigma fit error)
    SNR: 23.972119075406
 
  Angular difference between Flight and Ground position is 0.410418 arcmin
 
  Partial Coding Fraction: 0.859375    [ including projection effects ]

  Duration
     T90: 282.555999994278 +/- 32.5884964277169
        Measured from: 50.6360000967979
                   to: 333.192000091076     [s; relative to TRIGTIME]
     T50: 129.139999985695 +/- 8.06813311490682
        Measured from: 89.608000099659
                   to: 218.748000085354     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 211.743999987841     
                   to: 212.743999987841     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 29.3440000116825     
                   to: 441.488000005484     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.360028   2.703327   1.589688   0.171847
           0.096988   0.097433   0.087681   0.079120 [error]
 Peak      0.023716   0.021646   0.013631   0.007070
           0.004897   0.004813   0.004410   0.003849 [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 7.43e-07 1.11e-06 1.23e-06 2.59e-06 3.87e-06 5.66e-06   erg/cm2
              Error 5.59e-08 5.06e-08 8.73e-08 3.86e-07 1.99e-07 4.61e-07   erg/cm2
Peak flux Power-law 1.85e-01 1.70e-01 1.08e-01 1.05e-01 5.06e-01 5.67e-01   ph/cm2/s
              Error 6.60e-02 3.87e-02 3.67e-02 7.29e-02 1.14e-01 1.33e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.89e-07 1.16e-06 1.23e-06 1.19e-06 3.67e-06 4.27e-06   erg/cm2
              Error 6.66e-08 6.26e-08 9.44e-08 6.26e-07 2.35e-07 6.74e-07   erg/cm2
Peak flux Cutoff-PL 1.85e-01 1.70e-01 1.08e-01 1.04e-01 5.06e-01 5.66e-01   ph/cm2/s
              Error 6.60e-02 3.87e-02 3.67e-02 7.24e-02 1.14e-01 1.33e-01   ph/cm2/s
 
Fluence        Band 6.82e-07 1.16e-06 1.23e-06 1.18e-06 3.67e-06 4.37e-06   erg/cm2
              Error 6.59e-08 6.24e-08 9.42e-08 6.26e-07 2.35e-07 8.86e-07   erg/cm2
Peak flux      Band 1.85e-01 1.70e-01 1.08e-01 1.04e-01 5.06e-01 5.66e-01   ph/cm2/s
              Error 6.60e-02 3.87e-02 3.67e-02 9.62e-02 1.14e-01 1.33e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.845    0.088    -      -           1.02e-03 5.20e-05   64.294 57
CPL   1.247    0.378      58.1   22.4      2.10e-03 9.10e-04   57.955 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.655    0.431    -      -           3.87e-03 1.00e-03   39.600 57
CPL   1.653    0.433    9999.0 5000.0      3.88e-03 1.01e-03   39.601 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: 180.864000 sec.
T50 in the 50-300 keV band: 122.688000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  412.144   29.344  441.488
T90   282.556   50.636  333.192
T50   129.140   89.608  218.748
Peak    1.000  211.744  212.744

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  121.8931  +2.3049 0.0080   21.2   25.5       2.8048    24.0  TRIG_00332851       
------------------------------------------
 
Foreground time interval of the image:
 29.344 134.801 (delta_t = 105.457 [sec])
Background time interval of the image:
-239.000 -20.270 (delta_t = 218.730 [sec])
-19.000  29.344 (delta_t =  48.344 [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   29.344 sec. to  441.488 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84538     ( -8.782697E-02   8.915329E-02) )
Norm@50keV  : 1.020697E-03    ( -5.216536E-05   5.178188E-05) )
------------------------------------------------------------
 Chi-Squared =      64.29439     using    59 PHA bins.
 Reduced chi-squared =      1.127972     for     57 degrees of freedom
 Null hypothesis probability = 0.236
 
Photon flux (15-150 keV)    in 412.1 sec: 0.143201 ( -0.006702  0.006715 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.86786e-06 ( -1.98587e-07  2.0019e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   29.344 sec. to  441.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24731     ( -0.309733   0.445996 )
Epeak [keV] : 58.0806      ( -8.50292 36.3745 )
Norm@50keV  : 2.104592E-03    ( -8.616650E-04   9.593216E-04) )
------------------------------------------------------------
 Chi-Squared =      57.95493     using    59 PHA bins.
 Reduced chi-squared =      1.034909     for     56 degrees of freedom
 Null hypothesis probability = 0.403
 
Photon flux (15-150 keV)    in 412.1 sec: 0.138534 ( -0.007342  0.007361 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.67439e-06 ( -2.34794e-07  2.35944e-07 ) ergs/cm2
 
Band function
Time interval is from   29.344 sec. to  441.488 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.33291   ( -0.350452   0.383928 )
beta        : -7.88071    ( -2.11929   5.94898 )
Epeak [keV] : 59.9900      ( -10.0983 31.9964 )
Norm@50keV   : 1.906074E-03    ( -6.489777E-04   1.114849E-03) )
------------------------------------------------------------
 Chi-Squared =      57.79494     using    59 PHA bins.
 Reduced chi-squared =      1.050817     for     55 degrees of freedom
 Null hypothesis probability = 0.372
 
Photon flux (15-150 keV)    in 412.1 sec: 0.138539 ( -0.007354  0.007356 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.66968e-06 ( -2.339e-07  2.36339e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  211.744 sec. to  212.744 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65451     ( -0.416572   0.444545 )
Norm@50keV  : 3.869245E-03    ( -1.025318E-03   9.774303E-04) )
------------------------------------------------------------
 Chi-Squared =      39.59998     using    59 PHA bins.
 Reduced chi-squared =     0.6947364     for     57 degrees of freedom
 Null hypothesis probability = 0.962
 
Photon flux (15-150 keV)    in 1.000 sec: 0.505981 ( -0.114355  0.114393 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.59665e-08 ( -9.7931e-09  1.02264e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  211.744 sec. to  212.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65302     ( -0.418951   0.446483 )
Epeak [keV] : 9999.04      ( -9999.03 0.961914 )
Norm@50keV  : 3.878566E-03    ( -1.033721E-03   9.822743E-04) )
------------------------------------------------------------
 Chi-Squared =      39.60055     using    59 PHA bins.
 Reduced chi-squared =     0.7071527     for     56 degrees of freedom
 Null hypothesis probability = 0.952
 
Photon flux (15-150 keV)    in 1.000 sec: 0.505813 ( -0.114319  0.114357 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.59682e-08 ( -9.8004e-09  1.0225e-08 ) ergs/cm2
 
Band function
Time interval is from  211.744 sec. to  212.744 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.62942   ( -8.37058   1.56018 )
beta        : -9.30839    ( -0.691613   8.07090 )
Epeak [keV] : 682.379      ( -682.279 9317.62 )
Norm@50keV   : 3.993923E-03    ( -1.151841E-03   2.574755E-02) )
------------------------------------------------------------
 Chi-Squared =      39.60955     using    59 PHA bins.
 Reduced chi-squared =     0.7201736     for     55 degrees of freedom
 Null hypothesis probability = 0.941
 
Photon flux (15-150 keV)    in 1.000 sec: 0.505814 ( -0.114318  0.114303 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.55895e-08 ( -9.1047e-09  1.02246e-08 ) ergs/cm2
 
Plot creation:
Tue Oct 28 11:55:43 EDT 2008