batgrbproduct Analysis for Trigger=238546

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 12:21:03 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger238546/GCN5_download_cron
======================================================================

  Trigger: 00238546      Segment: 000

  BAT Trigger Time: 185083696   [s; MET]
      Trigger Stop: 185083760   [s; MET]
               UTC: 2006-11-13T04:08:14.432580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 288.721090010689   Dec: 10.640670567438  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.42
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.42

  Flight Position:   [ source = BAT ]
    RA: 288.721090010689   Dec: 10.640670567438  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 288.56339636238   Dec: 10.6551896204275  [deg; J2000]  
        { 19h 14m 15.2s , +10d 39' 18.7" }
         +/- 5.05321280354234 [arcmin] (estimated 90% radius based on SNR)
         +/- 4.23377074122426 [arcmin] (formal 1-sigma fit error)
    SNR: 3.00622737977886
    RA  =  19h 14m 15.2s  (288.563396 deg.)
    Dec =  10d 39' 19" (10.655190 deg.)
 
  Angular difference between Flight and Ground position is 9.339417 arcmin
 
  Partial Coding Fraction: 0.7265625    [ 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     0.035780   0.031163   0.012655  -0.006045
           0.010476   0.010431   0.008949   0.007576 [error]
 Peak      0.035780   0.031163   0.012655  -0.006045
           0.010476   0.010431   0.008949   0.007576 [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 1.26e-08 1.27e-08 8.96e-09 1.01e-08 3.82e-08 4.46e-08   erg/cm2
              Error 5.09e-09 5.60e-09 7.58e-09 1.81e-08 1.81e-08 2.90e-08   erg/cm2
Peak flux Power-law 1.33e-01 7.46e-02 2.64e-02 1.22e-02 2.41e-01 2.46e-01   ph/cm2/s
              Error 5.49e-02 3.16e-02 2.16e-02 2.02e-02 8.33e-02 8.73e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.25e-08 1.31e-08 8.82e-09 6.35e-09 3.77e-08 4.06e-08   erg/cm2
              Error 5.40e-09 6.74e-09 7.62e-09 1.79e-08 1.82e-08 2.77e-08   erg/cm2
Peak flux Cutoff-PL 1.31e-01 7.70e-02 2.62e-02 8.38e-03 2.40e-01 2.44e-01   ph/cm2/s
              Error 7.27e-02 3.80e-02 2.26e-02 2.00e-02 8.31e-02 8.63e-02   ph/cm2/s
 
Fluence        Band 1.24e-08 1.31e-08 8.82e-09 6.35e-09 3.76e-08 4.00e-08   erg/cm2
              Error 5.36e-09 6.71e-09 7.44e-09 1.79e-08 1.82e-08 2.78e-08   erg/cm2
Peak flux      Band 1.31e-01 7.73e-02 2.62e-02 8.41e-03 2.40e-01 2.43e-01   ph/cm2/s
              Error 5.90e-02 3.80e-02 2.50e-02 2.00e-02 8.31e-02 8.77e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.501    0.903    -      -           1.22e-03 9.95e-04   61.033 57
CPL   1.893    0.000       7.4 4999.9      2.74e-03 1.48e-01   61.059 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.501    0.903    -      -           1.22e-03 9.95e-04   61.033 57
CPL   1.893    1.586       7.4    0.0      2.74e-03 9.96e-04   61.059  0
 
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
  288.5634 +10.6552 0.0636   26.1 -131.8       0.0592     3.0  TRIG_00238546       
------------------------------------------
 
Foreground time interval of the image:
 56.000  59.120 (delta_t =   3.120 [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   56.000 sec. to   59.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.50057     ( -0.706697   1.09842 )
Norm@50keV  : 1.223952E-03    ( -1.223952E-03   7.657068E-04) )
------------------------------------------------------------
 Chi-Squared =      61.03333     using    59 PHA bins.
 Reduced chi-squared =      1.070760     for     57 degrees of freedom
 Null hypothesis probability = 0.333
 
Photon flux (15-150 keV)    in 3.120 sec: 0.240522 ( -0.083269  0.083408 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.81978e-08 ( -1.71058e-08  1.91699e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   56.000 sec. to   59.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89292     (     )
Epeak [keV] : 7.40054      ( -1.27624 9998.55 )
Norm@50keV  : 2.735560E-03    ( -2.480375E-03   0.292981 )
------------------------------------------------------------
 Chi-Squared =      61.05915     using    59 PHA bins.
 Reduced chi-squared =      1.090342     for     56 degrees of freedom
 Null hypothesis probability = 0.299
 
Photon flux (15-150 keV)    in 3.120 sec: 0.239926 ( -0.082796  0.083412 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.76799e-08 ( -1.68809e-08  1.96179e-08 ) ergs/cm2
 
Band function
Time interval is from   56.000 sec. to   59.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.76751   ( -4.40009   10.5999 )
beta        : -9.18319    ( -1.09855   0.706900 )
Epeak [keV] : 12.9164      ( -12.8164 9987.08 )
Norm@50keV   : 3.339586E-03    ( -0.166353   0.104064 )
------------------------------------------------------------
 Chi-Squared =      61.09677     using    59 PHA bins.
 Reduced chi-squared =      1.110850     for     55 degrees of freedom
 Null hypothesis probability = 0.266
 
Photon flux (15-150 keV)    in 3.120 sec: 0.239934 ( -0.082865  0.083382 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.75935e-08 ( -1.68869e-08  1.95774e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   56.000 sec. to   59.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.50057     ( -0.706697   1.09842 )
Norm@50keV  : 1.223952E-03    ( -1.223952E-03   7.657068E-04) )
------------------------------------------------------------
 Chi-Squared =      61.03333     using    59 PHA bins.
 Reduced chi-squared =      1.070760     for     57 degrees of freedom
 Null hypothesis probability = 0.333
 
Photon flux (15-150 keV)    in 3.120 sec: 0.240522 ( -0.083269  0.083408 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.81978e-08 ( -1.71058e-08  1.91699e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   56.000 sec. to   59.120 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89292     ( -3.03802   0.133948 )
Epeak [keV] : 7.40054      (   )
Norm@50keV  : 2.735560E-03    ( -1.246545E-03   7.453363E-04) )
------------------------------------------------------------
 Chi-Squared =      61.05915     using    59 PHA bins.
 but latest trial   2.02285     gives Chi-Squared =   1.13729
 Reduced chi-squared =      1.090342     for     56 degrees of freedom
 Null hypothesis probability = 0.299
 
Photon flux (15-150 keV)    in 3.120 sec: 0.239926 ( -0.082796  0.083412 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.76799e-08 ( -1.68809e-08  1.96179e-08 ) ergs/cm2
 
Band function
Time interval is from   56.000 sec. to   59.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.76751   ( -4.40009   10.5999 )
beta        : -9.18319    ( -1.09855   0.706900 )
Epeak [keV] : 12.9164      ( -12.8164 9987.08 )
Norm@50keV   : 3.339586E-03    ( -0.166353   0.104064 )
------------------------------------------------------------
 Chi-Squared =      61.09677     using    59 PHA bins.
 Reduced chi-squared =      1.110850     for     55 degrees of freedom
 Null hypothesis probability = 0.266
 
Photon flux (15-150 keV)    in 3.120 sec: 0.239934 ( -0.082865  0.083382 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.75935e-08 ( -1.68869e-08  1.95774e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 12:24:30 EST 2008