batgrbproduct Analysis for Trigger=361831

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Mon Sep  7 10:34:43 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger361831/SDC
======================================================================

  Trigger: 00361831      Segment: 000

  BAT Trigger Time: 273720263.168   [s; MET]
      Trigger Stop: 273720267.264   [s; MET]
               UTC: 2009-09-04T01:24:18.112980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 264.191456096339   Dec: -25.2122851571245  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.98
     Image Trigger?:     NO
     Rate S/N Ratio:     16.7332005306815  [ if not an image trigger ]
     Image S/N Ratio:    7.98

  Flight Position:   [ source = BAT ]
    RA: 264.191456096339   Dec: -25.2122851571245  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 264.193564814367   Dec: -25.2155784165271  [deg; J2000]  
        { 17h 36m 46.5s , -25d 12' 56.1" }
         +/- 1.23086590109822 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.476100405465506 [arcmin] (formal 1-sigma fit error)
    SNR: 22.6071540417896
 
  Angular difference between Flight and Ground position is 0.228357 arcmin
 
  Partial Coding Fraction: 0.08886719    [ including projection effects ]

  Duration
     T90: 64 +/- 16
        Measured from: -15.1679999828339
                   to: 48.8320000171661     [s; relative to TRIGTIME]
     T50: 32 +/- 16
        Measured from: 0.832000017166138
                   to: 32.8320000171661     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.33200001716614     
                   to: 9.33200001716614     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.1679999828339     
                   to: 64.8320000171661     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.594385   6.382555   5.093929   1.760963
           0.238829   0.232768   0.210293   0.187847 [error]
 Peak      1.334668   2.192807   1.627650   0.667192
           0.110706   0.112111   0.101308   0.086635 [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 1.89e-06 3.22e-06 4.17e-06 1.09e-05 1.23e-05 2.02e-05   erg/cm2
              Error 1.52e-07 1.50e-07 2.18e-07 1.28e-06 5.30e-07 1.41e-06   erg/cm2
Peak flux Power-law 1.22e+00 1.15e+00 7.52e-01 7.65e-01 3.43e+00 3.88e+00   ph/cm2/s
              Error 1.34e-01 7.65e-02 5.43e-02 1.15e-01 2.20e-01 2.29e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.89e-06 3.22e-06 4.18e-06 1.09e-05 1.23e-05 2.01e-05   erg/cm2
              Error 1.52e-07 1.51e-07 2.18e-07 1.27e-06 5.30e-07 1.40e-06   erg/cm2
Peak flux Cutoff-PL 1.16e+00 1.17e+00 7.69e-01 6.08e-01 3.39e+00 3.70e+00   ph/cm2/s
              Error 1.67e-01 6.43e-02 6.33e-02 2.72e-01 2.29e-01 3.48e-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    1.626    0.078    -      -           1.65e-02 6.83e-04   44.270 57
CPL   1.628    0.078    9999.4    0.0      1.65e-02 2.53e-03   44.290 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.609    0.105    -      -           2.66e-02 1.58e-03   44.230 57
CPL   1.390    0.360     147.2    0.0      3.40e-02 0.00e+00   43.420 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: 52.736000 sec.
T50 in the 50-300 keV band: 31.680000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   80.000  -15.168   64.832
T90    64.000  -15.168   48.832
T50    32.000    0.832   32.832
Peak    1.000    8.332    9.332

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  264.1936 -25.2156 0.0085   52.6  166.9      17.5037    22.6  TRIG_00361831       
------------------------------------------
 
Foreground time interval of the image:
-15.168  50.733 (delta_t =  65.901 [sec])
Background time interval of the image:
-56.467 -15.168 (delta_t =  41.299 [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  -15.168 sec. to   64.832 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62565     ( -0.0775055   0.0776991 )
Norm@50keV  : 1.64634E-02    ( -0.000682957   0.000682499 )
------------------------------------------------------------
# Chi-Squared =          44.27 using 59 PHA bins.
# Reduced chi-squared =         0.7766 for     57 degrees of freedom 
# Null hypothesis probability =   8.908779e-01
 
Photon flux (15-150 keV)    in 80 sec: 2.13277 ( -0.0985092  0.0989457 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22807e-05 ( -5.29098e-07  5.30202e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -15.168 sec. to   64.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62769     ( -0.0806486   0.0756201 )
Epeak [keV] : 9999.36      ( -10000 -10000 )
Norm@50keV  : 1.64739E-02    ( -0.000675067   0.00438271 )
------------------------------------------------------------
# Chi-Squared =          44.29 using 59 PHA bins.
# Reduced chi-squared =         0.7909 for     56 degrees of freedom 
# Null hypothesis probability =   8.708552e-01
 
Photon flux (15-150 keV)    in 80 sec: 2.13167 ( -0.09846  0.0989 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22827e-05 ( -5.2928e-07  5.304e-07 ) ergs/cm2
 
Band function
Time interval is from  -15.168 sec. to   64.832 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.464806   ( 1.09867   1.09867 )
beta        : -1.63776    ( 1.6394   0.0873053 )
Epeak [keV] : 26.2471      ( -38.3501 373.032 )
Norm@50keV   : 0.732124    ( -0.732123   1968.74 )
------------------------------------------------------------
# Chi-Squared =          43.94 using 59 PHA bins.
# Reduced chi-squared =         0.7990 for     55 degrees of freedom 
# Null hypothesis probability =   8.576130e-01
 
Photon flux (15-150 keV)    in 80 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    0.832 sec. to   16.832 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60893     ( -0.10445   0.105037 )
Norm@50keV  : 2.66141E-02    ( -0.00158582   0.00158294 )
------------------------------------------------------------
# Chi-Squared =          44.23 using 59 PHA bins.
# Reduced chi-squared =         0.7760 for     57 degrees of freedom 
# Null hypothesis probability =   8.916071e-01
 
Photon flux (15-150 keV)    in 16 sec: 3.42957 ( -0.219198  0.220013 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.97813e-06 ( -2.47674e-07  2.48234e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.832 sec. to   16.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38993     ( -0.446768   0.273487 )
Epeak [keV] : 147.184      (   )
Norm@50keV  : 3.39581E-02    (     )
------------------------------------------------------------
# Chi-Squared =          43.42 using 59 PHA bins.
# Reduced chi-squared =         0.7754 for     56 degrees of freedom 
# Null hypothesis probability =   8.900824e-01
 
Photon flux (15-150 keV)    in 16 sec: 3.38911 ( -0.229  0.22925 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.93274e-06 ( -2.65536e-07  1.99184e-07 ) ergs/cm2
 
Band function
Time interval is from    0.832 sec. to   16.832 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.581719   ( 0.875509   0.875509 )
beta        : -1.73478    ( 1.74144   0.185355 )
Epeak [keV] : 51.6949      ( -52.5552 260.229 )
Norm@50keV   : 0.107628    ( -0.0732444   1053.64 )
------------------------------------------------------------
# Chi-Squared =          42.00 using 59 PHA bins.
# Reduced chi-squared =         0.7636 for     55 degrees of freedom 
# Null hypothesis probability =   9.011766e-01
 
Photon flux (15-150 keV)    in 16 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Mon Sep  7 12:00:45 EDT 2009