batgrbproduct Analysis for Trigger=344582

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Sun Mar  1 17:12:59 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger344582/GCN5_download_cron
======================================================================

  Trigger: 00344582      Segment: 000

  BAT Trigger Time: 257583359.68   [s; MET]
      Trigger Stop: 257583360.704   [s; MET]
               UTC: 2009-03-01T06:55:55.141940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 338.14040286168   Dec: 26.6421673055728  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    21.68
     Image Trigger?:     NO
     Rate S/N Ratio:     95.3362470417207  [ if not an image trigger ]
     Image S/N Ratio:    21.68

  Flight Position:   [ source = BAT ]
    RA: 338.14040286168   Dec: 26.6421673055728  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 338.142475193166   Dec: 26.6386005751154  [deg; J2000]  
        { 22h 32m 34.2s , +26d 38' 19.0" }
         +/- 0.580782397819353 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.21745246322504 [arcmin] (formal 1-sigma fit error)
    SNR: 66.1061750621525
 
  Angular difference between Flight and Ground position is 0.241142 arcmin
 
  Partial Coding Fraction: 0.3554688    [ including projection effects ]

  Duration
     T90: 41.4160000085831 +/- 2.16476879489307
        Measured from: -1.77999991178513
                   to: 39.6360000967979     [s; relative to TRIGTIME]
     T50: 19.9160000085831 +/- 0.212037715242639
        Measured from: 5.17600008845329
                   to: 25.0920000970364     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 23.0679999887943     
                   to: 24.0679999887943     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -16.9640000164509     
                   to: 72.1559999883175     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.930826  11.291275  10.913857   3.598742
           0.097776   0.108430   0.106550   0.087742 [error]
 Peak      0.472065   0.764111   0.756034   0.283351
           0.017269   0.021487   0.022432   0.018220 [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 2.34e-06 5.03e-06 8.49e-06 3.28e-05 2.33e-05 4.64e-05   erg/cm2
              Error 8.12e-08 1.03e-07 1.33e-07 1.23e-06 3.46e-07 0.00e+00   erg/cm2
Peak flux Power-law 4.70e+00 5.84e+00 5.27e+00 8.27e+00 1.87e+01 2.41e+01   ph/cm2/s
              Error 3.20e-01 2.33e-01 1.89e-01 6.71e-01 6.19e-01 8.10e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.22e-06 5.05e-06 8.66e-06 2.72e-05 2.32e-05 3.12e-05   erg/cm2
              Error 1.15e-07 7.84e-08 1.73e-07 3.38e-06 3.57e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 4.69e+00 5.84e+00 5.28e+00 8.22e+00 1.86e+01 2.40e+01   ph/cm2/s
              Error 3.19e-01 2.33e-01 1.90e-01 6.67e-01 6.18e-01 8.07e-01   ph/cm2/s
 
Fluence        Band 2.20e-06 5.02e-06 8.64e-06 2.73e-05 2.32e-05 3.06e-05   erg/cm2
              Error 1.14e-07 1.04e-07 1.73e-07 3.38e-06 3.59e-07 0.00e+00   erg/cm2
Peak flux      Band 5.17e+01 6.43e+01 5.81e+01 9.11e+01 2.05e+02 2.43e+01   ph/cm2/s
              Error 2.67e+02 2.52e+02 3.56e+02 4.99e+02 8.38e+02 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.246    0.028    -      -           2.61e-02 4.08e-04   43.699 57
CPL   1.076    0.117     343.3  328.8      3.05e-02 3.19e-03   37.386 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.146    0.060    -      -           1.60e-01 5.07e-03   45.316 57
CPL   1.142    0.060    9987.7 5000.0      1.61e-01 5.09e-03   45.468 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: 35.712000 sec.
T50 in the 50-300 keV band: 19.648000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   89.120  -16.964   72.156
T90    41.416   -1.780   39.636
T50    19.916    5.176   25.092
Peak    1.000   23.068   24.068

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  338.1425 +26.6386 0.0029   35.3  -61.9      33.4190    66.1  TRIG_00344582       
------------------------------------------
 
Foreground time interval of the image:
-16.964  60.221 (delta_t =  77.185 [sec])
Background time interval of the image:
-239.680 -16.964 (delta_t = 222.716 [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  -16.964 sec. to   72.156 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24582     ( -2.807772E-02   2.798426E-02) )
Norm@50keV  : 2.611183E-02    ( -4.079845E-04   4.073083E-04) )
------------------------------------------------------------
 Chi-Squared =      43.69949     using    59 PHA bins.
 Reduced chi-squared =     0.7666577     for     57 degrees of freedom
 Null hypothesis probability = 0.902
 
Photon flux (15-150 keV)    in 89.12 sec: 3.08623 ( -0.05438  0.05456 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33153e-05 ( -3.46409e-07  3.46053e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -16.964 sec. to   72.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07605     ( -0.117964   0.115332 )
Epeak [keV] : 343.312      ( -113.393 544.186 )
Norm@50keV  : 3.050601E-02    ( -2.998590E-03   3.389647E-03) )
------------------------------------------------------------
 Chi-Squared =      37.38633     using    59 PHA bins.
 Reduced chi-squared =     0.6676130     for     56 degrees of freedom
 Null hypothesis probability = 0.974
 
Photon flux (15-150 keV)    in 89.12 sec: 3.04456 ( -0.06047  0.06028 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.31855e-05 ( -3.54163e-07  3.60312e-07 ) ergs/cm2
 
Band function
Time interval is from  -16.964 sec. to   72.156 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.818781   ( -0.304779   0.829900 )
beta        : -1.29958    ( -8.38078   0.366735 )
Epeak [keV] : 126.496      ( -289.398 545.735 )
Norm@50keV   : 4.284529E-02    ( -2.993213E-03   3.406608E-03) )
------------------------------------------------------------
 Chi-Squared =      37.57418     using    59 PHA bins.
 Reduced chi-squared =     0.6831669     for     55 degrees of freedom
 Null hypothesis probability = 0.965
 
Photon flux (15-150 keV)    in 89.12 sec: 3.04437 ( -0.06032  0.06069 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.31709e-05 ( -3.59599e-07  3.58797e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   23.068 sec. to   24.068 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14634     ( -6.007051E-02   5.989432E-02) )
Norm@50keV  : 0.160020    ( -5.074292E-03   5.070880E-03) )
------------------------------------------------------------
 Chi-Squared =      45.31596     using    59 PHA bins.
 Reduced chi-squared =     0.7950169     for     57 degrees of freedom
 Null hypothesis probability = 0.868
 
Photon flux (15-150 keV)    in 1.000 sec: 18.6536 ( -0.6178  0.6193 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6491e-06 ( -5.7377e-08  5.7563e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   23.068 sec. to   24.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14153     ( -6.050301E-02   6.030905E-02) )
Epeak [keV] : 9987.66      ( -9987.66 12.3350 )
Norm@50keV  : 0.160834    ( -5.093142E-03   5.091444E-03) )
------------------------------------------------------------
 Chi-Squared =      45.46812     using    59 PHA bins.
 Reduced chi-squared =     0.8119308     for     56 degrees of freedom
 Null hypothesis probability = 0.842
 
Photon flux (15-150 keV)    in 1.000 sec: 18.6458 ( -0.6176  0.6191 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.64948e-06 ( -5.7437e-08  5.7572e-08 ) ergs/cm2
 
Band function
Time interval is from   23.068 sec. to   24.068 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.899838   ( -9.10016   5.89688 )
beta        : -1.14633    ( -5.995166E-02   6.006467E-02) )
Epeak [keV] : 58.9403      ( -58.8403 9940.95 )
Norm@50keV   : 0.284297    ( -0.129299   2.111085E+06) )
------------------------------------------------------------
 Chi-Squared =      45.31601     using    59 PHA bins.
 Reduced chi-squared =     0.8239275     for     55 degrees of freedom
 Null hypothesis probability = 0.821
 
Photon flux (15-150 keV)    in 1.000 sec: 205.391 ( -133.43  1542.57 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.64819e-06 ( -5.7378e-08  5.7575e-08 ) ergs/cm2
 
Plot creation:
Sun Mar  1 17:26:14 EST 2009