batgrbproduct Analysis for Trigger=209755

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jan  1 12:03:27 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger209755/GCN5_download_cron
======================================================================

  Trigger: 00209755      Segment: 000

  BAT Trigger Time: 169168401.92   [s; MET]
      Trigger Stop: 169168406.016   [s; MET]
               UTC: 2006-05-12T23:13:20.730480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 195.772493538686   Dec: 41.2119095233357  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.39
     Image Trigger?:     NO
     Rate S/N Ratio:     11.6619037896906  [ if not an image trigger ]
     Image S/N Ratio:    9.39

  Flight Position:   [ source = BAT ]
    RA: 195.772493538686   Dec: 41.2119095233357  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 195.745180609779   Dec: 41.2098566943351  [deg; J2000]  
        { 13h 02m 58.8s , +41d 12' 35.5" }
         +/- 1.90536190270406 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.743801100421648 [arcmin] (formal 1-sigma fit error)
    SNR: 12.1101787973048
    RA  =  13h  2m 58.8s  (195.745181 deg.)
    Dec =  41d 12' 35" (41.209857 deg.)
 
  Angular difference between Flight and Ground position is 1.238972 arcmin
 
  Partial Coding Fraction: 0.4179688    [ including projection effects ]

  Duration
     T90: 8.48800000548363 +/- 1.58984402433081
        Measured from: -3.63999998569489
                   to: 4.84800001978874     [s; relative to TRIGTIME]
     T50: 4.27200001478195 +/- 1.35597198191131
        Measured from: -0.863999992609024
                   to: 3.40800002217293     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.2960000038147     
                   to: 4.2960000038147     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.36399999260902     
                   to: 5.30400002002716     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.196743   0.195069   0.057354   0.013520
           0.023460   0.023303   0.019228   0.016769 [error]
 Peak      0.036568   0.042840   0.009063  -0.007177
           0.007708   0.007569   0.006249   0.005361 [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 7.52e-08 7.68e-08 5.52e-08 6.35e-08 2.32e-07 2.70e-07   erg/cm2
              Error 1.32e-08 1.21e-08 1.69e-08 3.64e-08 4.02e-08 6.11e-08   erg/cm2
Peak flux Power-law 5.41e-01 2.54e-01 7.21e-02 2.57e-02 8.82e-01 8.93e-01   ph/cm2/s
              Error 1.40e-01 7.09e-02 3.98e-02 2.54e-02 2.00e-01 2.05e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.24e-08 8.81e-08 4.00e-08 5.21e-09 2.05e-07 2.05e-07   erg/cm2
              Error 1.43e-08 1.74e-08 3.28e-08 2.07e-08 4.34e-08 5.98e-08   erg/cm2
Peak flux Cutoff-PL 5.06e-01 3.21e-01 3.47e-02 2.91e-04 8.61e-01 8.62e-01   ph/cm2/s
              Error 1.60e-01 1.04e-01 4.94e-02 1.39e-02 1.99e-01 1.99e-01   ph/cm2/s
 
Fluence        Band 6.07e-08 8.02e-08 5.61e-08 6.52e-08 2.34e-07 3.46e-07   erg/cm2
              Error 8.76e-09 1.25e-08 1.98e-08 3.74e-08 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 5.18e-01 3.15e-01 4.14e-02 6.83e-04 8.68e-01 8.93e-01   ph/cm2/s
              Error 1.60e-01 9.22e-02 2.81e-02 1.59e-02 1.96e-01 2.04e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.476    0.297    -      -           2.41e-03 5.46e-04   36.133 57
CPL   1.011    1.752      23.0   16.0      2.17e-02 5.70e-01   33.583  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.816    0.523    -      -           3.65e-03 1.58e-03   67.239 57
CPL  -0.163    2.503      22.9   11.1      3.78e-01 9.95e+00   64.440  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    9.668   -4.364    5.304
T90     8.488   -3.640    4.848
T50     4.272   -0.864    3.408
Peak    1.000    3.296    4.296

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  195.7452 +41.2099 0.0158   35.4  148.7       0.5266    12.1  TRIG_00209755       
------------------------------------------
 
Foreground time interval of the image:
 -4.364   5.304 (delta_t =   9.668 [sec])
Background time interval of the image:
-239.920  -4.364 (delta_t = 235.556 [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   -4.364 sec. to    5.304 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.47614     ( -0.281010   0.313688 )
Norm@50keV  : 2.414587E-03    ( -5.490219E-04   5.426363E-04) )
------------------------------------------------------------
 Chi-Squared =      36.13293     using    59 PHA bins.
 Reduced chi-squared =     0.6339111     for     57 degrees of freedom
 Null hypothesis probability = 0.986
 
Photon flux (15-150 keV)    in 9.668 sec: 0.467487 ( -0.065992  0.065992 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.3203e-07 ( -3.95286e-08  4.09266e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -4.364 sec. to    5.304 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01061     ( -2.51780   0.985499 )
Epeak [keV] : 22.9860      ( -22.9760 8.99209 )
Norm@50keV  : 2.170248E-02    ( -1.791451E-02   1.12185 )
------------------------------------------------------------
 Chi-Squared =      33.58275     using    59 PHA bins.
 but latest trial   1.99611     gives Chi-Squared =   5.62921
 but latest trial  3.373526E-03 gives Chi-Squared =   11.1824
 Reduced chi-squared =     0.5996919     for     56 degrees of freedom
 Null hypothesis probability = 0.992
 
Photon flux (15-150 keV)    in 9.668 sec: 0.453047 ( -0.067108  0.067487 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.05063e-07 ( -3.90365e-08  4.78247e-08 ) ergs/cm2
 
Band function
Time interval is from   -4.364 sec. to    5.304 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.17573   ( -7.75261   6.17573 )
beta        : -3.23488    ( -6.76512   0.853977 )
Epeak [keV] : 21.7511      ( -21.6511 8.74929 )
Norm@50keV   : 1.677450E-02    ( -0.130897   310.484 )
------------------------------------------------------------
 Chi-Squared =      33.41764     using    59 PHA bins.
 Reduced chi-squared =     0.6075935     for     55 degrees of freedom
 Null hypothesis probability = 0.991
 
Photon flux (15-150 keV)    in 9.668 sec: 0.458807 ( -0.064845  0.067029 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.3375e-07 ( -3.75012e-08  3.73465e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    3.296 sec. to    4.296 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.81563     ( -0.463215   0.583767 )
Norm@50keV  : 3.653885E-03    ( -1.540158E-03   1.610514E-03) )
------------------------------------------------------------
 Chi-Squared =      67.23944     using    59 PHA bins.
 Reduced chi-squared =      1.179639     for     57 degrees of freedom
 Null hypothesis probability = 0.166
 
Photon flux (15-150 keV)    in 1.000 sec: 0.882079 ( -0.200367  0.200621 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.05864e-08 ( -1.11478e-08  1.19914e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.296 sec. to    4.296 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: -0.163132     ( -2.83687   2.16845 )
Epeak [keV] : 22.8986      ( -14.5692 7.69863 )
Norm@50keV  : 0.378131    ( -0.378131   19.5210 )
------------------------------------------------------------
 Chi-Squared =      64.43992     using    59 PHA bins.
 but latest trial   2.01203     gives Chi-Squared =   11.6178
 but latest trial   8.32945     gives Chi-Squared =  0.742584
 Reduced chi-squared =      1.150713     for     56 degrees of freedom
 Null hypothesis probability = 0.205
 
Photon flux (15-150 keV)    in 1.000 sec: 0.861378 ( -0.196612  0.200562 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.61045e-08 ( -9.3424e-09  1.16478e-08 ) ergs/cm2
 
Band function
Time interval is from    3.296 sec. to    4.296 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.43904   ( -8.56096   6.43904 )
beta        : -9.36580    ( -0.634201   19.3658 )
Epeak [keV] : 14.2512      ( -9.10743 59.5639 )
Norm@50keV   : 2.852483E-02    ( -1.99136   540.171 )
------------------------------------------------------------
 Chi-Squared =      64.99096     using    59 PHA bins.
 Reduced chi-squared =      1.181654     for     55 degrees of freedom
 Null hypothesis probability = 0.168
 
Photon flux (15-150 keV)    in 1.000 sec: 0.867981 ( -0.201474  0.191199 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.76311e-08 ( -9.8232e-09  1.064e-08 ) ergs/cm2
 
Plot creation:
Tue Jan  1 12:26:17 EST 2008