batgrbproduct Analysis for Trigger=234516

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 08:46:53 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger234516/SDC
======================================================================

  Trigger: 00234516      Segment: 000

  BAT Trigger Time: 182924348.48   [s; MET]
      Trigger Stop: 182924352.576   [s; MET]
               UTC: 2006-10-19T04:19:06.964420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 91.6165852177475   Dec: 29.572562393964  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.37
     Image Trigger?:     NO
     Rate S/N Ratio:     11.916375287813  [ if not an image trigger ]
     Image S/N Ratio:    7.37

  Flight Position:   [ source = BAT ]
    RA: 91.6165852177475   Dec: 29.572562393964  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 91.6490441213318   Dec: 29.5570407706596  [deg; J2000]  
        { 06h 06m 35.8s , +29d 33' 25.3" }
         +/- 3.96974195166324 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.99076277209939 [arcmin] (formal 1-sigma fit error)
    SNR: 4.24369046302428
    RA  =   6h  6m 35.8s  (91.649044 deg.)
    Dec =  29d 33' 25" (29.557041 deg.)
 
  Angular difference between Flight and Ground position is 1.933086 arcmin
 
  Partial Coding Fraction: 0.05810547    [ including projection effects ]

  Duration
     T90: 180.27199998498 +/- 6.405797365844
        Measured from: -167.752000004053
                   to: 12.5199999809265     [s; relative to TRIGTIME]
     T50: 167.823999971151 +/- 160.05074496643
        Measured from: -162.151999980211
                   to: 5.67199999094009     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.59600001573563     
                   to: 4.59600001573563     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -169.223999977112     
                   to: 15.1920000016689     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.570797   1.536731   1.084652   0.089759
           0.266810   0.269607   0.237149   0.212401 [error]
 Peak      0.097269   0.079148   0.083394  -0.010064
           0.025499   0.024737   0.020872   0.016257 [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 5.51e-07 7.32e-07 7.13e-07 1.24e-06 2.40e-06 3.24e-06   erg/cm2
              Error 1.44e-07 1.36e-07 2.32e-07 8.12e-07 5.32e-07 1.07e-06   erg/cm2
Peak flux Power-law 1.07e+00 7.32e-01 3.27e-01 2.02e-01 2.23e+00 2.34e+00   ph/cm2/s
              Error 4.46e-01 2.06e-01 1.56e-01 1.84e-01 6.41e-01 6.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.46e-07 7.44e-07 7.12e-07 9.83e-07 2.38e-06 2.93e-06   erg/cm2
              Error 1.53e-07 1.63e-07 2.38e-07 6.19e-07 5.66e-07 1.28e-06   erg/cm2
Peak flux Cutoff-PL 1.07e+00 7.33e-01 3.27e-01 2.01e-01 2.23e+00 2.33e+00   ph/cm2/s
              Error 4.46e-01 2.06e-01 1.56e-01 1.83e-01 6.41e-01 6.57e-01   ph/cm2/s
 
Fluence        Band 5.46e-07 7.40e-07 7.00e-07 1.18e-06 2.38e-06 3.28e-06   erg/cm2
              Error 1.37e-07 1.63e-07 2.40e-07 5.44e-07 7.09e-07 0.00e+00   erg/cm2
Peak flux      Band 1.07e+00 7.33e-01 3.27e-01 2.01e-01 2.23e+00 2.33e+00   ph/cm2/s
              Error 4.46e-01 2.06e-01 1.24e-01 1.83e-01 6.41e-01 6.57e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.038    0.361    -      -           1.41e-03 3.35e-04   63.032 57
CPL   1.704    0.000      39.4 4999.9      2.15e-03 5.59e-03   63.077  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.165    0.588    -      -           1.37e-02 5.07e-03   57.152 57
CPL   2.397    0.914     161.6 4941.6      1.06e-02 3.88e-02   57.053 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: 8.256000 sec.
T50 in the 50-300 keV band: 4.608000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  184.416 -169.224   15.192
T90   180.272 -167.752   12.520
T50   167.824 -162.152    5.672
Peak    1.000    3.596    4.596

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   91.6490 +29.5570 0.0453   40.1   70.4       3.8975     4.2  TRIG_00234516       
------------------------------------------
 
Foreground time interval of the image:
-169.224  15.192 (delta_t = 184.416 [sec])
Background time interval of the image:
-239.480 -169.224 (delta_t =  70.256 [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 -169.224 sec. to   15.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03780     ( -0.342472   0.380134 )
Norm@50keV  : 1.410313E-03    ( -3.433048E-04   3.264130E-04) )
------------------------------------------------------------
 Chi-Squared =      63.03248     using    59 PHA bins.
 Reduced chi-squared =      1.105833     for     57 degrees of freedom
 Null hypothesis probability = 0.272
 
Photon flux (15-150 keV)    in 184.4 sec: 0.215308 ( -0.039622  0.039641 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.40412e-06 ( -5.2436e-07  5.40384e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -169.224 sec. to   15.192 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70394     (     )
Epeak [keV] : 39.4007      ( -27.8322 9971.88 )
Norm@50keV  : 2.147055E-03    ( -1.713024E-03   9.457178E-03) )
------------------------------------------------------------
 Chi-Squared =      63.07657     using    59 PHA bins.
 but latest trial   14.1994     gives Chi-Squared =  9.948730E-03
 Reduced chi-squared =      1.126367     for     56 degrees of freedom
 Null hypothesis probability = 0.240
 
Photon flux (15-150 keV)    in 184.4 sec: 0.214467 ( -0.040331  0.039782 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37893e-06 ( -5.73408e-07  5.58603e-07 ) ergs/cm2
 
Band function
Time interval is from -169.224 sec. to   15.192 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.60663   ( -13.1206   1.87944 )
beta        : -8.60423    ( -0.468618   0.364351 )
Epeak [keV] : 40.2797      ( -19.6916 31.2205 )
Norm@50keV   : 2.454568E-03    ( -29.3616   884.294 )
------------------------------------------------------------
 Chi-Squared =      63.15540     using    59 PHA bins.
 Reduced chi-squared =      1.148280     for     55 degrees of freedom
 Null hypothesis probability = 0.210
 
Photon flux (15-150 keV)    in 184.4 sec: 0.214452 ( -0.03967  0.04017 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37714e-06 ( -5.42525e-07  5.4481e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    3.592 sec. to    4.600 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.16503     ( -0.510952   0.665659 )
Norm@50keV  : 1.373508E-02    ( -5.412887E-03   4.718001E-03) )
------------------------------------------------------------
 Chi-Squared =      57.15249     using    59 PHA bins.
 Reduced chi-squared =      1.002675     for     57 degrees of freedom
 Null hypothesis probability = 0.469
 
Photon flux (15-150 keV)    in 1.008 sec: 2.23291 ( -0.64079  0.64101 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.29389e-07 ( -4.13487e-08  4.17876e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.592 sec. to    4.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.39679     ( -1.74428   8.301401E-02) )
Epeak [keV] : 161.587      ( -44.7362 9838.41 )
Norm@50keV  : 1.060161E-02    ( -1.060161E-02   6.704903E-02) )
------------------------------------------------------------
 Chi-Squared =      57.05252     using    59 PHA bins.
 Reduced chi-squared =      1.018795     for     56 degrees of freedom
 Null hypothesis probability = 0.436
 
Photon flux (15-150 keV)    in 1.008 sec: 2.23212 ( -0.64061  0.64081 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.29561e-07 ( -4.15263e-08  4.1704e-08 ) ergs/cm2
 
Band function
Time interval is from    3.592 sec. to    4.600 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.98979   ( -7.87071   7.12929 )
beta        : -8.21899    ( -0.665509   0.510848 )
Epeak [keV] : 8.20110      ( -8.10110 9991.80 )
Norm@50keV   : 1.539928E-02    ( -0.735572   0.641479 )
------------------------------------------------------------
 Chi-Squared =      57.32389     using    59 PHA bins.
 Reduced chi-squared =      1.042253     for     55 degrees of freedom
 Null hypothesis probability = 0.389
 
Photon flux (15-150 keV)    in 1.008 sec: 2.23209 ( -0.64059  0.64082 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.29971e-07 ( -3.86527e-08  3.65571e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 09:00:25 EST 2008