batgrbproduct Analysis for Trigger=344252

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Thu Feb 26 19:45:38 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger344252/GCN5_download_cron
======================================================================

  Trigger: 00344252      Segment: 000

  BAT Trigger Time: 257352371.52   [s; MET]
      Trigger Stop: 257352372.032   [s; MET]
               UTC: 2009-02-26T14:46:06.989200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 172.771365759222   Dec: 53.4210196314729  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.08
     Image Trigger?:     NO
     Rate S/N Ratio:     4.89897948556636  [ if not an image trigger ]
     Image S/N Ratio:    5.08

  Flight Position:   [ source = BAT ]
    RA: 172.771365759222   Dec: 53.4210196314729  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 173.097976681621   Dec: 53.3895377475957  [deg; J2000]  
        { 11h 32m 23.5s , +53d 23' 22.3" }
         +/- 4.59504441967493 [arcmin] (estimated 90% radius based on SNR)
         +/- 4.70915624331974 [arcmin] (formal 1-sigma fit error)
    SNR: 3.44342174051664
 
  Angular difference between Flight and Ground position is 11.834274 arcmin
 
  Partial Coding Fraction: 0.6171875    [ including projection effects ]

  Duration
     T90: 0.511999994516373 +/- 
        Measured from: 0
                   to: 0.511999994516373     [s; relative to TRIGTIME]
     T50: 0.511999994516373 +/- 
        Measured from: 0
                   to: 0.511999994516373     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.511999994516373 second)
        Measured from: 1.49011611938477e-08     
                   to: 0.512000009417534     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.511999994516373     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.003986  -0.004899   0.014204   0.008828
           0.004664   0.004760   0.004322   0.003773 [error]
 Peak     -0.003986  -0.004899   0.014204   0.008828
           0.004664   0.004760   0.004322   0.003773 [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 1.88e-10 1.11e-09 5.73e-09 1.32e-07 1.85e-08 2.66e-07   erg/cm2
              Error 4.29e-10 1.45e-09 4.71e-09 1.75e-07 1.29e-08 0.00e+00   erg/cm2
Peak flux Power-law 1.11e-02 3.50e-02 9.18e-02 6.90e-01 2.49e-01 8.41e-01   ph/cm2/s
              Error 2.65e-02 4.81e-02 7.68e-02 7.98e-01 2.09e-01 7.69e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.46e-11 1.15e-09 7.78e-09 2.72e-08 1.98e-08 3.19e-08   erg/cm2
              Error 4.85e-09 1.62e-07 9.68e-09 1.72e-07 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 4.41e-03 3.18e-02 1.21e-01 2.20e-01 2.68e-01 3.78e-01   ph/cm2/s
              Error 2.00e-02 4.54e-02 8.07e-02 7.96e-01 1.42e-01 6.86e-01   ph/cm2/s
 
Fluence        Band 5.73e-11 9.93e-10 8.00e-09 2.15e-08 1.98e-08 3.75e-08   erg/cm2
              Error 3.78e-09 1.33e-07 9.55e-09 1.76e-07 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 2.04e-03 2.49e-02 1.26e-01 1.78e-01 2.62e-01 3.30e-01   ph/cm2/s
              Error 1.32e-02 2.55e-02 8.39e-02 3.01e-01 1.46e-01 4.84e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.384    1.526    -      -           1.58e-03 1.69e-03   64.335 57
CPL  -0.405    1.814    9998.8 5000.0      1.60e-03 1.70e-03   64.318 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.384    1.526    -      -           1.58e-03 1.69e-03   64.335 57
CPL  -0.405    1.814    9998.8 5000.0      1.60e-03 1.70e-03   64.318 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.512    0.000    0.512
T90     0.512    0.000    0.512
T50     0.512    0.000    0.512
Peak    0.512    0.000    0.512

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  173.0980 +53.3895 0.0557   30.7   25.0       0.0289     3.4  TRIG_00344252       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.512 (delta_t =   0.512 [sec])
Background time interval of the image:
-60.520 -60.030 (delta_t =   0.490 [sec])
-58.520  -3.520 (delta_t =  55.000 [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
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.383564     ( -2.02818   1.02379 )
Norm@50keV  : 1.577029E-03    ( -1.577029E-03   1.800914E-03) )
------------------------------------------------------------
 Chi-Squared =      64.33538     using    59 PHA bins.
 Reduced chi-squared =      1.128691     for     57 degrees of freedom
 Null hypothesis probability = 0.235
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.249390 ( -0.24939  0.169296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85353e-08 ( -1.61784e-08  9.71628e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.405320     ( -2.59468   1.03320 )
Epeak [keV] : 9998.84      ( -9998.83 1.15918 )
Norm@50keV  : 1.597009E-03    ( -1.597009E-03   1.812745E-03) )
------------------------------------------------------------
 Chi-Squared =      64.31833     using    59 PHA bins.
 Reduced chi-squared =      1.148542     for     56 degrees of freedom
 Null hypothesis probability = 0.208
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.267687 ( -0.138317  0.145853 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97792e-08 ( -9.64905e-09  9.71023e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38550   ( -14.9765   2.348518E-02) )
beta        : -9.28935    (     )
Epeak [keV] : 126.365      (   )
Norm@50keV   : 2.109768E-02    (     )
------------------------------------------------------------
 Chi-Squared =      62.90557     using    59 PHA bins.
 Reduced chi-squared =      1.143738     for     55 degrees of freedom
 Null hypothesis probability = 0.217
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.261728 ( -0.131624  0.159952 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97505e-08 ( -9.52786e-09  9.58131e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.383564     ( -2.02818   1.02379 )
Norm@50keV  : 1.577029E-03    ( -1.577029E-03   1.800914E-03) )
------------------------------------------------------------
 Chi-Squared =      64.33538     using    59 PHA bins.
 Reduced chi-squared =      1.128691     for     57 degrees of freedom
 Null hypothesis probability = 0.235
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.249390 ( -0.24939  0.169296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85353e-08 ( -1.61784e-08  9.71628e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.405320     ( -2.59468   1.03320 )
Epeak [keV] : 9998.84      ( -9998.83 1.15918 )
Norm@50keV  : 1.597009E-03    ( -1.597009E-03   1.812745E-03) )
------------------------------------------------------------
 Chi-Squared =      64.31833     using    59 PHA bins.
 Reduced chi-squared =      1.148542     for     56 degrees of freedom
 Null hypothesis probability = 0.208
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.267687 ( -0.138317  0.145853 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97792e-08 ( -9.64905e-09  9.71023e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38550   ( -14.9765   2.348518E-02) )
beta        : -9.28935    (     )
Epeak [keV] : 126.365      (   )
Norm@50keV   : 2.109768E-02    (     )
------------------------------------------------------------
 Chi-Squared =      62.90557     using    59 PHA bins.
 Reduced chi-squared =      1.143738     for     55 degrees of freedom
 Null hypothesis probability = 0.217
 
Photon flux (15-150 keV)    in 0.5120 sec: 0.261728 ( -0.131624  0.159952 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97505e-08 ( -9.52786e-09  9.58131e-09 ) ergs/cm2
 
Plot creation:
Thu Feb 26 20:15:10 EST 2009