batgrbproduct Analysis for Trigger=362818

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Wed Sep 16 15:04:38 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger362818/GCN5_download_cron
======================================================================

  Trigger: 00362818      Segment: 000

  BAT Trigger Time: 274777249.216   [s; MET]
      Trigger Stop: 274777249.472   [s; MET]
               UTC: 2009-09-16T07:00:44.126400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 126.579580098003   Dec: 25.9332286507725  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.61
     Image Trigger?:     NO
     Rate S/N Ratio:     16.3707055437449  [ if not an image trigger ]
     Image S/N Ratio:    7.61

  Flight Position:   [ source = BAT ]
    RA: 126.579580098003   Dec: 25.9332286507725  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 126.580528546906   Dec: 25.9419122848889  [deg; J2000]  
        { 08h 26m 19.3s , +25d 56' 30.9" }
         +/- 2.69328126571536 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.24079026621722 [arcmin] (formal 1-sigma fit error)
    SNR: 7.38635578046617
 
  Angular difference between Flight and Ground position is 0.523525 arcmin
 
  Partial Coding Fraction: 0.3476562    [ including projection effects ]

  Duration
     T90: 63.4639999270439 +/- 15.2145472216625
        Measured from: 0.144000113010406
                   to: 63.6080000400543     [s; relative to TRIGTIME]
     T50: 40.2599999308586 +/- 17.6556687731481
        Measured from: 3.37600010633469
                   to: 43.6360000371933     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0400000214576721     
                   to: 0.959999978542328     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0360000133514404     
                   to: 68.5119999647141     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.431793   0.337392   0.457595   0.123840
           0.081871   0.085631   0.076141   0.067741 [error]
 Peak      0.061079   0.074711   0.068812   0.019111
           0.011012   0.011929   0.011125   0.009088 [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 1.13e-07 2.22e-07 3.38e-07 1.12e-06 9.48e-07 1.79e-06   erg/cm2
              Error 3.96e-08 4.63e-08 7.37e-08 5.56e-07 1.83e-07 5.97e-07   erg/cm2
Peak flux Power-law 5.98e-01 6.35e-01 4.77e-01 5.82e-01 1.93e+00 2.29e+00   ph/cm2/s
              Error 1.76e-01 1.15e-01 8.91e-02 2.27e-01 3.22e-01 3.65e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.13e-07 2.22e-07 3.39e-07 1.11e-06 9.48e-07 1.79e-06   erg/cm2
              Error 3.96e-08 4.64e-08 7.38e-08 5.52e-07 1.83e-07 5.94e-07   erg/cm2
Peak flux Cutoff-PL 5.98e-01 6.35e-01 4.77e-01 5.79e-01 1.93e+00 2.29e+00   ph/cm2/s
              Error 1.76e-01 1.15e-01 8.92e-02 2.26e-01 3.22e-01 3.65e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.394    0.329    -      -           1.43e-03 2.58e-04   53.580 57
CPL   1.391    1.834    9999.2    0.0      1.43e-03 1.85e-03   53.580 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.412    0.275    -      -           1.58e-02 2.51e-03   48.530 57
CPL   1.411    0.276    9999.4    0.0      1.59e-02 1.84e-02   48.530 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: 66.880000 sec.
T50 in the 50-300 keV band: 39.360000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   68.548   -0.036   68.512
T90    63.464    0.144   63.608
T50    40.260    3.376   43.636
Peak    1.000   -0.040    0.960

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  126.5805 +25.9419 0.0260   48.2  -11.3       1.3578     7.4  TRIG_00362818       
------------------------------------------
 
Foreground time interval of the image:
 -0.036  68.512 (delta_t =  68.548 [sec])
Background time interval of the image:
-228.115  -0.036 (delta_t = 228.079 [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   -0.036 sec. to   68.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39390     ( -0.331198   0.326689 )
Norm@50keV  : 1.42964E-03    ( -0.000258434   0.000258428 )
------------------------------------------------------------
# Chi-Squared =          53.58 using 59 PHA bins.
# Reduced chi-squared =         0.9400 for     57 degrees of freedom 
# Null hypothesis probability =   6.040973e-01
 
Photon flux (15-150 keV)    in 68.55 sec: 0.173866 ( -0.0336393  0.0338635 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.48142e-07 ( -1.82567e-07  1.8361e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.036 sec. to   68.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39051     ( -1.15091   2.51697 )
Epeak [keV] : 9999.16      (   )
Norm@50keV  : 1.43485E-03    ( -0.000259372   0.00344203 )
------------------------------------------------------------
# Chi-Squared =          53.58 using 59 PHA bins.
# Reduced chi-squared =         0.9569 for     56 degrees of freedom 
# Null hypothesis probability =   5.668700e-01
 
Photon flux (15-150 keV)    in 68.55 sec: 0.173798 ( -0.033627  0.033853 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.48403e-07 ( -1.82645e-07  1.84043e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.036 sec. to   68.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.02722   ( 1.02739   1.02739 )
beta        : -1.39588    ( 1.39674   0.3334 )
Epeak [keV] : 61.4282      ( -61.1742 -61.1742 )
Norm@50keV   : 2.74312E-03    ( -0.00274986   3.78966 )
------------------------------------------------------------
# Chi-Squared =          53.57 using 59 PHA bins.
# Reduced chi-squared =         0.9741 for     55 degrees of freedom 
# Null hypothesis probability =   5.292683e-01
 
Photon flux (15-150 keV)    in 68.55 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.036 sec. to    0.956 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41163     ( -0.275594   0.27373 )
Norm@50keV  : 1.58257E-02    ( -0.00250801   0.0025025 )
------------------------------------------------------------
# Chi-Squared =          48.53 using 59 PHA bins.
# Reduced chi-squared =         0.8514 for     57 degrees of freedom 
# Null hypothesis probability =   7.802592e-01
 
Photon flux (15-150 keV)    in 0.992 sec: 1.93242 ( -0.32097  0.322624 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51339e-07 ( -2.56993e-08  2.58515e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.036 sec. to    0.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41122     ( -0.279196   0.273708 )
Epeak [keV] : 9999.36      ( -9999.99 -9999.99 )
Norm@50keV  : 1.58727E-02    ( -0.00250733   0.0343425 )
------------------------------------------------------------
# Chi-Squared =          48.53 using 59 PHA bins.
# Reduced chi-squared =         0.8666 for     56 degrees of freedom 
# Null hypothesis probability =   7.504879e-01
 
Photon flux (15-150 keV)    in 0.992 sec: 1.93187 ( -0.32087  0.32252 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51379e-07 ( -2.57126e-08  2.58644e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.036 sec. to    0.956 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99490   ( -376.605   -376.605 )
beta        : -1.46822    ( -0.315679   0.289397 )
Epeak [keV] : 23.7989      ( -23.0797 10.5332 )
Norm@50keV   : 2085.30    ( -2094.13   5.73782e+06 )
------------------------------------------------------------
# Chi-Squared =          47.59 using 59 PHA bins.
# Reduced chi-squared =         0.8652 for     55 degrees of freedom 
# Null hypothesis probability =   7.507353e-01
 
Photon flux (15-150 keV)    in 0.992 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Wed Sep 16 15:22:30 EDT 2009