batgrbproduct Analysis for Trigger=236944

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 10:37:41 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger236944/GCN5_download_cron
======================================================================

  Trigger: 00236944      Segment: 000

  BAT Trigger Time: 184373024   [s; MET]
      Trigger Stop: 184373088   [s; MET]
               UTC: 2006-11-04T22:43:42.449640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 325.440479567475   Dec: 43.8248484710723  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    5.87
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    5.87

  Flight Position:   [ source = BAT ]
    RA: 325.440479567475   Dec: 43.8248484710723  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 325.656971636291   Dec: 43.798627673511  [deg; J2000]  
        { 21h 42m 37.7s , +43d 47' 55.1" }
         +/- 6.32608103564988 [arcmin] (estimated 90% radius based on SNR)
         +/- 4.63983781532809 [arcmin] (formal 1-sigma fit error)
    SNR: 2.18092215602089
    RA  =  21h 42m 37.7s  (325.656972 deg.)
    Dec =  43d 47' 55" (43.798628 deg.)
 
  Angular difference between Flight and Ground position is 9.504587 arcmin
 
  Partial Coding Fraction: 0.6484375    [ 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     0.133057   0.098594   0.003829  -0.022766
           0.035214   0.035544   0.031497   0.027650 [error]
 Peak      0.133057   0.098594   0.003829  -0.022766
           0.035214   0.035544   0.031497   0.027650 [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 4.81e-08 3.66e-08 1.85e-08 1.35e-08 1.09e-07 1.18e-07   erg/cm2
              Error 1.73e-08 1.82e-08 2.01e-08 2.66e-08 5.04e-08 6.38e-08   erg/cm2
Peak flux Power-law 4.84e-02 2.07e-02 5.25e-03 1.63e-03 7.54e-02 7.60e-02   ph/cm2/s
              Error 1.78e-02 9.92e-03 5.54e-03 2.97e-03 2.67e-02 2.72e-02   ph/cm2/s
 
Fluence   Cutoff-PL 4.71e-08 4.63e-08 1.41e-08 9.25e-10 1.09e-07 1.08e-07   erg/cm2
              Error 1.94e-08 3.62e-08 1.90e-08 1.89e-08 4.56e-08 5.08e-08   erg/cm2
Peak flux Cutoff-PL 4.66e-02 2.62e-02 4.25e-03 1.50e-04 7.72e-02 7.72e-02   ph/cm2/s
              Error 1.99e-02 2.01e-02 5.44e-03 2.17e-03 2.59e-02 2.61e-02   ph/cm2/s
 
Fluence        Band 4.50e-08 4.83e-08 8.11e-09 1.15e-10 1.02e-07 1.02e-07   erg/cm2
              Error 2.07e-08 2.69e-08 9.71e-09 5.35e-10 4.96e-08 5.35e-08   erg/cm2
Peak flux      Band 4.69e-02 2.62e-02 3.99e-03 1.17e-04 7.70e-02 7.70e-02   ph/cm2/s
              Error 1.88e-02 9.76e-03 3.77e-03 2.17e-03 2.58e-02 2.59e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.983    0.891    -      -           2.77e-04 2.49e-04   52.754 57
CPL   1.025    3.893      17.4   17.8      5.26e-03 1.25e+00   51.441 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.983    0.891    -      -           2.77e-04 2.49e-04   52.754 57
CPL   1.025    4.366      17.4   17.8      5.26e-03 1.25e+00   51.441 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
  325.6570 +43.7986 0.0882   34.7  174.8       0.1487     2.2  TRIG_00236944       
------------------------------------------
 
Foreground time interval of the image:
  0.000  33.063 (delta_t =  33.063 [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   33.063 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.98345     ( -0.709677   1.07289 )
Norm@50keV  : 2.772091E-04    ( -2.772091E-04   2.214905E-04) )
------------------------------------------------------------
 Chi-Squared =      52.75362     using    59 PHA bins.
 Reduced chi-squared =     0.9255022     for     57 degrees of freedom
 Null hypothesis probability = 0.635
 
Photon flux (15-150 keV)    in 33.06 sec: 7.535925E-02 ( -0.026579  0.0268247 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09499e-07 ( -4.67663e-08  5.40534e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   33.063 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02489     ( -4.02489   3.76125 )
Epeak [keV] : 17.3812      ( -17.3712 18.2334 )
Norm@50keV  : 5.261599E-03    ( -5.261599E-03   2.49238 )
------------------------------------------------------------
 Chi-Squared =      51.44103     using    59 PHA bins.
 Reduced chi-squared =     0.9185899     for     56 degrees of freedom
 Null hypothesis probability = 0.648
 
Photon flux (15-150 keV)    in 33.06 sec: 7.720655E-02 ( -0.0259741  0.0258084 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08504e-07 ( -4.26824e-08  4.86091e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   33.063 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.43450   ( -8.56550   1.35202 )
beta        : -9.34972    ( -0.650276   19.3497 )
Epeak [keV] : 12.9355      ( -12.8355 22.7901 )
Norm@50keV   : 2.828013E-03    ( -2.828013E-03   97279.3 )
------------------------------------------------------------
 Chi-Squared =      51.48108     using    59 PHA bins.
 Reduced chi-squared =     0.9360195     for     55 degrees of freedom
 Null hypothesis probability = 0.610
 
Photon flux (15-150 keV)    in 33.06 sec: 7.700844E-02 ( -0.0258305  0.0257336 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01996e-07 ( -3.89222e-08  6.03153e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   33.063 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.98345     ( -0.709677   1.07289 )
Norm@50keV  : 2.772091E-04    ( -2.772091E-04   2.214905E-04) )
------------------------------------------------------------
 Chi-Squared =      52.75362     using    59 PHA bins.
 Reduced chi-squared =     0.9255022     for     57 degrees of freedom
 Null hypothesis probability = 0.635
 
Photon flux (15-150 keV)    in 33.06 sec: 7.535925E-02 ( -0.026579  0.0268247 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09499e-07 ( -4.67663e-08  5.40534e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   33.063 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02489     ( -4.02489   4.70799 )
Epeak [keV] : 17.3812      ( -17.3712 18.2334 )
Norm@50keV  : 5.261599E-03    ( -5.261599E-03   2.49238 )
------------------------------------------------------------
 Chi-Squared =      51.44103     using    59 PHA bins.
 Reduced chi-squared =     0.9185899     for     56 degrees of freedom
 Null hypothesis probability = 0.648
 
Photon flux (15-150 keV)    in 33.06 sec: 7.720655E-02 ( -0.0259741  0.0258084 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08504e-07 ( -4.26824e-08  4.86091e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   33.063 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.43450   ( -8.56550   1.35202 )
beta        : -9.34972    ( -0.650276   19.3497 )
Epeak [keV] : 12.9355      ( -12.8355 22.7901 )
Norm@50keV   : 2.828013E-03    ( -2.828013E-03   97279.3 )
------------------------------------------------------------
 Chi-Squared =      51.48108     using    59 PHA bins.
 Reduced chi-squared =     0.9360195     for     55 degrees of freedom
 Null hypothesis probability = 0.610
 
Photon flux (15-150 keV)    in 33.06 sec: 7.700844E-02 ( -0.0258305  0.0257336 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01996e-07 ( -3.89222e-08  6.03153e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 10:45:35 EST 2008