batgrbproduct Analysis for Trigger=257741

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 11:56:11 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger257741/GCN5_download_cron
======================================================================

  Trigger: 00257741      Segment: 000

  BAT Trigger Time: 191471608   [s; MET]
      Trigger Stop: 191471672   [s; MET]
               UTC: 2007-01-26T02:33:26.277220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 33.4603956656862   Dec: -73.5233322332982  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.04
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.04

  Flight Position:   [ source = BAT ]
    RA: 33.4603956656862   Dec: -73.5233322332982  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 33.5220139316693   Dec: -73.5469752595029  [deg; J2000]  
        { 02h 14m 05.3s , -73d 32' 49.1" }
         +/- 4.04906580855426 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.33145769421398 [arcmin] (formal 1-sigma fit error)
    SNR: 4.12542423224347
    RA  =   2h 14m  5.3s  (33.522014 deg.)
    Dec = -73d 32' 49" (-73.546975 deg.)
 
  Angular difference between Flight and Ground position is 1.763626 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.110069   0.189526   0.023997  -0.000086
           0.036065   0.036212   0.032328   0.028906 [error]
 Peak      0.110069   0.189526   0.023997  -0.000086
           0.036065   0.036212   0.032328   0.028906 [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 3.72e-08 4.96e-08 4.84e-08 8.48e-08 1.63e-07 2.14e-07   erg/cm2
              Error 1.37e-08 1.57e-08 2.51e-08 7.84e-08 6.15e-08 1.18e-07   erg/cm2
Peak flux Power-law 1.90e-02 1.40e-02 6.82e-03 4.73e-03 4.20e-02 4.45e-02   ph/cm2/s
              Error 7.10e-03 4.37e-03 3.43e-03 5.16e-03 1.29e-02 1.40e-02   ph/cm2/s
 
Fluence   Cutoff-PL 3.51e-08 7.54e-08 2.04e-08 2.08e-10 1.31e-07 1.31e-07   erg/cm2
              Error 1.26e-08 2.22e-08 2.45e-08 3.02e-09 3.94e-08 3.94e-08   erg/cm2
Peak flux Cutoff-PL 1.72e-02 2.14e-02 3.31e-03 1.86e-05 4.19e-02 4.19e-02   ph/cm2/s
              Error 6.24e-03 6.03e-03 3.72e-03 2.49e-04 1.14e-02 1.13e-02   ph/cm2/s
 
Fluence        Band 3.26e-08 7.70e-08 1.82e-08 2.24e-10 1.30e-07 1.43e-07   erg/cm2
              Error 2.32e-08 1.98e-08 1.87e-10 4.83e-08 6.03e-08 0.00e+00   erg/cm2
Peak flux      Band 1.86e-02 2.20e-02 2.96e-03 1.86e-05 4.14e-02 3.83e-02   ph/cm2/s
              Error 6.23e-03 3.41e-03 8.22e-04 1.12e-02 1.29e-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    2.034    0.511    -      -           2.76e-04 1.10e-04   46.750 57
CPL  -2.496    0.000      33.7    7.4      2.48e-01 3.27e-01   38.655 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.034    0.511    -      -           2.76e-04 1.10e-04   46.750 57
CPL  -2.496    0.000      33.7    7.4      2.48e-01 3.27e-01   38.655 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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   33.5220 -73.5470 0.0464    6.1   92.0       0.2932     4.1  TRIG_00257741       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [sec])
Background time interval of the image:

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   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03387     ( -0.475322   0.546780 )
Norm@50keV  : 2.755316E-04    ( -1.094418E-04   1.098966E-04) )
------------------------------------------------------------
 Chi-Squared =      46.75001     using    59 PHA bins.
 Reduced chi-squared =     0.8201756     for     57 degrees of freedom
 Null hypothesis probability = 0.832
 
Photon flux (15-150 keV)    in 64.00 sec: 4.200408E-02 ( -0.0128309  0.0128769 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.63055e-07 ( -5.88902e-08  6.42086e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.49608     (     )
Epeak [keV] : 33.6733      ( -6.31811 8.53378 )
Norm@50keV  : 0.247856    ( -0.263708   0.390842 )
------------------------------------------------------------
 Chi-Squared =      38.65478     using    59 PHA bins.
 Reduced chi-squared =     0.6902639     for     56 degrees of freedom
 Null hypothesis probability = 0.963
 
Photon flux (15-150 keV)    in 64.00 sec: 4.193637E-02 ( -0.0113552  0.0113655 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.31174e-07 ( -3.78541e-08  4.096e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.123121   ( -4.61488   6.688309E-02) )
beta        : -9.32281    ( -2.53734   4.85218 )
Epeak [keV] : 35.8524      ( -7.10772 5.87097 )
Norm@50keV   : 6.622601E-03    ( -11.9369   33.6968 )
------------------------------------------------------------
 Chi-Squared =      41.00924     using    59 PHA bins.
 Reduced chi-squared =     0.7456225     for     55 degrees of freedom
 Null hypothesis probability = 0.920
 
Photon flux (15-150 keV)    in 64.00 sec: 4.144660E-02 ( -0.0112044  0.0111434 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2955e-07 ( -3.50586e-08  6.16096e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03387     ( -0.475322   0.546780 )
Norm@50keV  : 2.755316E-04    ( -1.094418E-04   1.098966E-04) )
------------------------------------------------------------
 Chi-Squared =      46.75001     using    59 PHA bins.
 Reduced chi-squared =     0.8201756     for     57 degrees of freedom
 Null hypothesis probability = 0.832
 
Photon flux (15-150 keV)    in 64.00 sec: 4.200408E-02 ( -0.0128309  0.0128769 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.63055e-07 ( -5.88902e-08  6.42086e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.49608     (     )
Epeak [keV] : 33.6733      ( -6.31811 8.53378 )
Norm@50keV  : 0.247856    ( -0.263708   0.390842 )
------------------------------------------------------------
 Chi-Squared =      38.65478     using    59 PHA bins.
 Reduced chi-squared =     0.6902639     for     56 degrees of freedom
 Null hypothesis probability = 0.963
 
Photon flux (15-150 keV)    in 64.00 sec: 4.193637E-02 ( -0.0113552  0.0113655 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.31174e-07 ( -3.78541e-08  4.096e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.123121   ( -4.61488   6.688309E-02) )
beta        : -9.32281    ( -2.53734   4.85218 )
Epeak [keV] : 35.8524      ( -7.10772 5.87097 )
Norm@50keV   : 6.622601E-03    ( -11.9369   33.6968 )
------------------------------------------------------------
 Chi-Squared =      41.00924     using    59 PHA bins.
 Reduced chi-squared =     0.7456225     for     55 degrees of freedom
 Null hypothesis probability = 0.920
 
Photon flux (15-150 keV)    in 64.00 sec: 4.144660E-02 ( -0.0112044  0.0111434 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2955e-07 ( -3.50586e-08  6.16096e-08 ) ergs/cm2
 
Plot creation:
Thu Dec 13 12:22:51 EST 2007