batgrbproduct Analysis for Trigger=325268

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Sep 19 07:28:00 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger325268/GCN5_download_cron
======================================================================

  Trigger: 00325268      Segment: 000

  BAT Trigger Time: 243475516.16   [s; MET]
      Trigger Stop: 243475516.672   [s; MET]
               UTC: 2008-09-19T00:05:13.051580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 265.288933640242   Dec: -42.3961038809504  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.57
     Image Trigger?:     NO
     Rate S/N Ratio:     26  [ if not an image trigger ]
     Image S/N Ratio:    6.57

  Flight Position:   [ source = BAT ]
    RA: 265.288933640242   Dec: -42.3961038809504  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 265.220700237057   Dec: -42.3748668847154  [deg; J2000]  
        { 17h 40m 53.0s , -42d 22' 29.5" }
         +/- 1.91984760732696 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.998542355148406 [arcmin] (formal 1-sigma fit error)
    SNR: 11.9798556323725
 
  Angular difference between Flight and Ground position is 3.281439 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 0.604000002145767 +/- 0.0804984370607107
        Measured from: 0.116000086069107
                   to: 0.720000088214874     [s; relative to TRIGTIME]
     T50: 0.336000025272369 +/- 0.0850411706287281
        Measured from: 0.232000082731247
                   to: 0.568000108003616     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.078000009059906     
                   to: 0.921999990940094     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0839999914169312     
                   to: 0.759999990463257     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.021447   0.034601   0.035226   0.015367
           0.004895   0.004753   0.004310   0.003727 [error]
 Peak      0.021447   0.034601   0.035226   0.015367
           0.004895   0.004753   0.004310   0.003727 [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 6.02e-09 1.42e-08 2.64e-08 1.19e-07 7.17e-08 1.66e-07   erg/cm2
              Error 1.72e-09 2.33e-09 4.14e-09 4.54e-08 1.07e-08 4.73e-08   erg/cm2
Peak flux Power-law 2.84e-01 3.63e-01 3.40e-01 5.59e-01 1.18e+00 1.55e+00   ph/cm2/s
              Error 8.25e-02 6.21e-02 5.14e-02 1.95e-01 1.64e-01 2.25e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.99e-09 1.42e-08 2.65e-08 1.18e-07 7.17e-08 1.45e-07   erg/cm2
              Error 1.72e-09 2.33e-09 4.14e-09 4.50e-08 1.07e-08 0.00e+00   erg/cm2
Peak flux Cutoff-PL 2.83e-01 3.63e-01 3.40e-01 5.55e-01 1.18e+00 1.54e+00   ph/cm2/s
              Error 8.25e-02 6.21e-02 5.15e-02 1.93e-01 1.64e-01 2.25e-01   ph/cm2/s
 
Fluence        Band 5.92e-09 1.41e-08 2.64e-08 1.18e-07 7.17e-08 1.49e-07   erg/cm2
              Error 1.71e-09 2.32e-09 4.13e-09 4.25e-08 1.07e-08 0.00e+00   erg/cm2
Peak flux      Band 2.83e-01 3.64e-01 3.41e-01 5.62e-01 1.17e+00 1.55e+00   ph/cm2/s
              Error 7.44e-02 6.62e-02 4.96e-02 1.92e-01 1.22e-01 2.43e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.097    0.258    -      -           1.01e-02 1.37e-03   33.126 57
CPL   1.092    0.260    9998.3    2.6      1.02e-02 1.37e-03   33.143 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.097    0.258    -      -           1.01e-02 1.37e-03   33.126 57
CPL   1.094    0.260    9999.2 5000.0      1.02e-02 1.37e-03   33.143 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: 0.640000 sec.
T50 in the 50-300 keV band: 0.320000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.676    0.084    0.760
T90     0.604    0.116    0.720
T50     0.336    0.232    0.568
Peak    1.000   -0.078    0.922

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  265.2207 -42.3749 0.0160   16.3 -177.4       0.1047    12.0  TRIG_00325268       
------------------------------------------
 
Foreground time interval of the image:
  0.084   0.760 (delta_t =   0.676 [sec])
Background time interval of the image:
-179.759   0.084 (delta_t = 179.843 [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    0.084 sec. to    0.760 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09683     ( -0.263514   0.252675 )
Norm@50keV  : 1.013740E-02    ( -1.367216E-03   1.363311E-03) )
------------------------------------------------------------
 Chi-Squared =      33.12646     using    59 PHA bins.
 Reduced chi-squared =     0.5811660     for     57 degrees of freedom
 Null hypothesis probability = 0.995
 
Photon flux (15-150 keV)    in 0.6760 sec: 1.17552 ( -0.16398  0.16475 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.16945e-08 ( -1.05774e-08  1.07484e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.084 sec. to    0.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09207     ( -0.265464   0.254345 )
Epeak [keV] : 9998.31      ( -3.60156 1.69043 )
Norm@50keV  : 1.019178E-02    ( -1.372370E-03   1.369092E-03) )
------------------------------------------------------------
 Chi-Squared =      33.14299     using    59 PHA bins.
 Reduced chi-squared =     0.5918391     for     56 degrees of freedom
 Null hypothesis probability = 0.994
 
Photon flux (15-150 keV)    in 0.6760 sec: 1.17505 ( -0.16388  0.1647 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.17283e-08 ( -1.06075e-08  1.07153e-08 ) ergs/cm2
 
Band function
Time interval is from    0.084 sec. to    0.760 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.807601   ( -10.4350   4.56497 )
beta        : -1.10225    ( -0.273427   0.268790 )
Epeak [keV] : 89.4387      ( -32.6415 9966.52 )
Norm@50keV   : 1.732936E-02    ( -2.25638   969.850 )
------------------------------------------------------------
 Chi-Squared =      33.10197     using    59 PHA bins.
 Reduced chi-squared =     0.6018541     for     55 degrees of freedom
 Null hypothesis probability = 0.992
 
Photon flux (15-150 keV)    in 0.6760 sec: 1.17198 ( -0.15927  0.1691 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.16506e-08 ( -1.05783e-08  1.07457e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 21.3720       -4.1587  5.8111
R^2/D10^2   : 4.312926E-02  -0.0227398   0.0436085
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Chi-Squared =      49.49543     using    59 PHA bins.
 Reduced chi-squared =     0.8683410     for     57 degrees of freedom
 Null hypothesis probability = 0.750
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.497e-09   7.546e-10
25- 50  1.297e-08   2.951e-09
50-150  4.422e-08   1.193e-08
15-150  5.970e-08   1.290e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363             
Norm        : 4.86872       -4.86872      1e+24
------------------------------------------------------------
 Chi-Squared =      42.91508     using    59 PHA bins.
 Reduced chi-squared =     0.7528962     for     57 degrees of freedom
 Null hypothesis probability = 0.917
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.192e-09   3.993e-09
25- 50  1.576e-08   8.058e-09
50-150  3.461e-08   1.790e-08
15-150  5.857e-08   2.881e-08
Double BB
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.78312       -2.98881      5.28828
R1^2/D10^2  : 0.774548       -0.609607     3.71407
kT2 [keV]   : 43.8249       -17.4147      156.175
R2^2/D10^2  : 4.461023E-03      -0.00426472    1e+24
------------------------------------------------------------
 Chi-Squared =      32.72783     using    59 PHA bins.
 but latest trial  1.963037E-04 gives Chi-Squared =   2.86829
 Reduced chi-squared =     0.5950515     for     55 degrees of freedom
 Null hypothesis probability = 0.993
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.314e-09   2.801e-09
25- 50  1.426e-08   5.889e-09
50-150  5.430e-08   2.875e-08
15-150  7.487e-08   3.405e-08

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.084 sec. to    0.760 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09683     ( -0.263507   0.252682 )
Norm@50keV  : 1.013740E-02    ( -1.367213E-03   1.363316E-03) )
------------------------------------------------------------
 Chi-Squared =      33.12646     using    59 PHA bins.
 Reduced chi-squared =     0.5811660     for     57 degrees of freedom
 Null hypothesis probability = 0.995
 
Photon flux (15-150 keV)    in 0.6760 sec: 1.17551 ( -0.16394  0.16476 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.17277e-08 ( -1.06096e-08  1.07072e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.084 sec. to    0.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09353     ( -0.266937   0.252920 )
Epeak [keV] : 9999.19      ( -9999.18 0.809570 )
Norm@50keV  : 1.018700E-02    ( -1.367701E-03   1.373897E-03) )
------------------------------------------------------------
 Chi-Squared =      33.14312     using    59 PHA bins.
 Reduced chi-squared =     0.5918415     for     56 degrees of freedom
 Null hypothesis probability = 0.994
 
Photon flux (15-150 keV)    in 0.6760 sec: 1.17505 ( -0.16388  0.1647 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.17405e-08 ( -1.06141e-08  1.07072e-08 ) ergs/cm2
 
Band function
Time interval is from    0.084 sec. to    0.760 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.807606   ( -9.19239   5.65719 )
beta        : -1.10225    ( -8.89775   0.267670 )
Epeak [keV] : 89.4395      ( -89.3395 9909.76 )
Norm@50keV   : 1.732922E-02    ( -3.59117   966.784 )
------------------------------------------------------------
 Chi-Squared =      33.10197     using    59 PHA bins.
 Reduced chi-squared =     0.6018541     for     55 degrees of freedom
 Null hypothesis probability = 0.992
 
Photon flux (15-150 keV)    in 0.6760 sec: 1.17250 ( -0.15872  0.08627 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.1654e-08 ( -1.05816e-08  1.07477e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 21.3722       -4.1589  5.8109
R^2/D10^2   : 4.312804E-02  -0.0227386   0.0436097
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Chi-Squared =      49.49543     using    59 PHA bins.
 Reduced chi-squared =     0.8683410     for     57 degrees of freedom
 Null hypothesis probability = 0.750
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.497e-09   7.709e-10
25- 50  1.297e-08   3.196e-09
50-150  4.423e-08   1.189e-08
15-150  5.970e-08   1.403e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363             
Norm        : 4.86868       -4.86868      1e+24
------------------------------------------------------------
 Chi-Squared =      42.91508     using    59 PHA bins.
 Reduced chi-squared =     0.7528962     for     57 degrees of freedom
 Null hypothesis probability = 0.917
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.192e-09   3.773e-09
25- 50  1.576e-08   7.694e-09
50-150  3.461e-08   1.722e-08
15-150  5.857e-08   2.994e-08
Double BB
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.77938       -2.98507      5.29852
R1^2/D10^2  : 0.775581       -0.610642     3.71303
kT2 [keV]   : 43.7757       -17.3656      156.224
R2^2/D10^2  : 4.476469E-03      -0.00427618    1e+24
------------------------------------------------------------
 Chi-Squared =      32.72785     using    59 PHA bins.
 but latest trial  2.002865E-04 gives Chi-Squared =   2.54844
 Reduced chi-squared =     0.5950518     for     55 degrees of freedom
 Null hypothesis probability = 0.993
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.316e-09   2.754e-09
25- 50  1.426e-08   5.916e-09
50-150  5.432e-08   3.076e-08
15-150  7.489e-08   3.447e-08
Plot creation:
Fri Sep 19 08:04:24 EDT 2008