batgrbproduct Analysis for Trigger=230662

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 05:16:09 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger230662/GCN5_download_cron
======================================================================

  Trigger: 00230662      Segment: 000

  BAT Trigger Time: 180681136.832   [s; MET]
      Trigger Stop: 180681137.856   [s; MET]
               UTC: 2006-09-23T05:12:15.370360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 254.6230284423   Dec: 12.3791714036898  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.22
     Image Trigger?:     NO
     Rate S/N Ratio:     11.8743420870379  [ if not an image trigger ]
     Image S/N Ratio:    7.22

  Flight Position:   [ source = BAT ]
    RA: 254.6230284423   Dec: 12.3791714036898  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 254.621425547464   Dec: 12.3417709313121  [deg; J2000]  
        { 16h 58m 29.1s , +12d 20' 30.4" }
         +/- 2.21007972692287 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.900424955083281 [arcmin] (formal 1-sigma fit error)
    SNR: 9.79731419718656
    RA  =  16h 58m 29.1s  (254.621426 deg.)
    Dec =  12d 20' 30" (12.341771 deg.)
 
  Angular difference between Flight and Ground position is 2.245994 arcmin
 
  Partial Coding Fraction: 0.3398438    [ including projection effects ]

  Duration
     T90: 51.6520000100136 +/- 4.31663248830958
        Measured from: -40.83599999547
                   to: 10.8160000145435     [s; relative to TRIGTIME]
     T50: 26.0480000078678 +/- 12.9279772654958
        Measured from: -23.2399999797344
                   to: 2.80800002813339     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0320000052452087     
                   to: 1.03200000524521     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -42.2519999742508     
                   to: 11.4880000054836     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.458405   0.599308   0.333714   0.016162
           0.071038   0.068954   0.058387   0.047738 [error]
 Peak      0.042235   0.065848   0.048294   0.013781
           0.010378   0.010420   0.009227   0.007190 [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 1.44e-07 2.35e-07 2.90e-07 7.08e-07 8.69e-07 1.37e-06   erg/cm2
              Error 3.13e-08 3.31e-08 5.52e-08 2.76e-07 1.33e-07 3.26e-07   erg/cm2
Peak flux Power-law 4.15e-01 4.34e-01 3.22e-01 3.84e-01 1.32e+00 1.56e+00   ph/cm2/s
              Error 1.44e-01 9.16e-02 7.32e-02 1.85e-01 2.57e-01 2.93e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.18e-07 2.72e-07 3.04e-07 1.46e-07 7.98e-07 8.45e-07   erg/cm2
              Error 3.81e-08 4.57e-08 6.74e-08 2.00e-07 1.42e-07 2.58e-07   erg/cm2
Peak flux Cutoff-PL 4.07e-01 4.39e-01 3.25e-01 3.39e-01 1.31e+00 1.51e+00   ph/cm2/s
              Error 1.65e-01 1.05e-01 8.30e-02 2.61e-01 2.59e-01 3.75e-01   ph/cm2/s
 
Fluence        Band 1.17e-07 2.70e-07 3.04e-07 1.49e-07 7.99e-07 8.48e-07   erg/cm2
              Error 1.88e-08 4.25e-08 3.60e-08 2.89e-07 1.43e-07 1.43e-07   erg/cm2
Peak flux      Band 3.90e-01 4.49e-01 3.27e-01 3.32e-01 1.30e+00 1.49e+00   ph/cm2/s
              Error 1.48e-01 1.13e-01 8.21e-02 1.42e-01 2.58e-01 3.72e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.696    0.232    -      -           1.75e-03 2.56e-04   72.561 57
CPL   0.318    1.301      57.9   28.7      9.22e-03 2.73e-02   67.762 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.434    0.336    -      -           1.07e-02 2.02e-03   60.610 57
CPL   1.287    1.533     251.6 5000.0      1.27e-02 3.03e-02   60.596  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: 3.584000 sec.
T50 in the 50-300 keV band: 2.112000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   53.740  -42.252   11.488
T90    51.652  -40.836   10.816
T50    26.048  -23.240    2.808
Peak    1.000    0.032    1.032

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  254.6214 +12.3418 0.0195   33.5  -78.8       1.4820     9.8  TRIG_00230662       
------------------------------------------
 
Foreground time interval of the image:
-42.252  10.969 (delta_t =  53.221 [sec])
Background time interval of the image:
-239.832 -42.252 (delta_t = 197.580 [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  -42.252 sec. to   11.488 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69554     ( -0.229310   0.235297 )
Norm@50keV  : 1.746392E-03    ( -2.573251E-04   2.545665E-04) )
------------------------------------------------------------
 Chi-Squared =      72.56118     using    59 PHA bins.
 Reduced chi-squared =      1.273003     for     57 degrees of freedom
 Null hypothesis probability = 8.019E-02
 
Photon flux (15-150 keV)    in 53.74 sec: 0.231587 ( -0.032754  0.032836 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.69363e-07 ( -1.32646e-07  1.34173e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -42.252 sec. to   11.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.318320     ( -1.49937   1.10274 )
Epeak [keV] : 57.9025      ( -11.8330 45.6371 )
Norm@50keV  : 9.220421E-03    ( -9.220421E-03   4.530887E-02) )
------------------------------------------------------------
 Chi-Squared =      67.76173     using    59 PHA bins.
 Reduced chi-squared =      1.210031     for     56 degrees of freedom
 Null hypothesis probability = 0.135
 
Photon flux (15-150 keV)    in 53.74 sec: 0.220469 ( -0.034311  0.03416 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.98179e-07 ( -1.39369e-07  1.45254e-07 ) ergs/cm2
 
Band function
Time interval is from  -42.252 sec. to   11.488 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.326921   ( -1.09468   1.21106 )
beta        : -7.01270    ( -2.98730   17.0121 )
Epeak [keV] : 57.9392      ( -11.8290 45.7429 )
Norm@50keV   : 9.132854E-03    ( -9.132854E-03   8.639027E-03) )
------------------------------------------------------------
 Chi-Squared =      67.76198     using    59 PHA bins.
 Reduced chi-squared =      1.232036     for     55 degrees of freedom
 Null hypothesis probability = 0.116
 
Photon flux (15-150 keV)    in 53.74 sec: 0.220648 ( -0.031965  0.034045 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.98544e-07 ( -1.41997e-07  1.44195e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.032 sec. to    1.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43389     ( -0.337347   0.334362 )
Norm@50keV  : 1.074262E-02    ( -2.018550E-03   2.012028E-03) )
------------------------------------------------------------
 Chi-Squared =      60.61047     using    59 PHA bins.
 Reduced chi-squared =      1.063342     for     57 degrees of freedom
 Null hypothesis probability = 0.347
 
Photon flux (15-150 keV)    in 1.000 sec: 1.31867 ( -0.25626  0.25771 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03079e-07 ( -2.09366e-08  2.1235e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.032 sec. to    1.032 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28666     ( -1.70568   1.35998 )
Epeak [keV] : 251.639      ( -251.629 9748.36 )
Norm@50keV  : 1.271563E-02    ( -3.960059E-03   5.659397E-02) )
------------------------------------------------------------
 Chi-Squared =      60.59630     using    59 PHA bins.
 but latest trial  8.908480E-02 gives Chi-Squared =   78.0847
 Reduced chi-squared =      1.082077     for     56 degrees of freedom
 Null hypothesis probability = 0.314
 
Photon flux (15-150 keV)    in 1.000 sec: 1.31382 ( -0.26179  0.25694 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01873e-07 ( -2.28288e-08  2.236e-08 ) ergs/cm2
 
Band function
Time interval is from    0.032 sec. to    1.032 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.995600   ( -9.00440   4.87498 )
beta        : -1.63937    ( -8.36063   0.535367 )
Epeak [keV] : 106.530      ( -106.430 425.797 )
Norm@50keV   : 1.821115E-02    ( -1.821114E-02   5538.76 )
------------------------------------------------------------
 Chi-Squared =      60.49690     using    59 PHA bins.
 Reduced chi-squared =      1.099944     for     55 degrees of freedom
 Null hypothesis probability = 0.284
 
Photon flux (15-150 keV)    in 1.000 sec: 1.30336 ( -0.25477  0.26094 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01236e-07 ( -1.89515e-08  1.3217e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 05:38:20 EST 2008