batgrbproduct Analysis for Trigger=319036

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Aug  5 14:05:46 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger319036/GCN5_download_cron
======================================================================

  Trigger: 00319036      Segment: 000

  BAT Trigger Time: 239614897.728   [s; MET]
      Trigger Stop: 239614898.752   [s; MET]
               UTC: 2008-08-05T07:41:34.733120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 314.231247555151   Dec: -62.4380396223226  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.81
     Image Trigger?:     NO
     Rate S/N Ratio:     27.1845544381364  [ if not an image trigger ]
     Image S/N Ratio:    8.81

  Flight Position:   [ source = BAT ]
    RA: 314.231247555151   Dec: -62.4380396223226  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 314.227179063433   Dec: -62.4353599295385  [deg; J2000]  
        { 20h 56m 54.5s , -62d 26' 07.3" }
         +/- 0.858234393425319 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.299979404042519 [arcmin] (formal 1-sigma fit error)
    SNR: 37.841389353301
 
  Angular difference between Flight and Ground position is 0.196494 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 106.304000020027 +/- 18.0569906873012
        Measured from: -0.687999993562698
                   to: 105.616000026464     [s; relative to TRIGTIME]
     T50: 38.2080000042915 +/- 5.61050444150932
        Measured from: 7.3120000064373
                   to: 45.5200000107288     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.30000001192093     
                   to: 3.30000001192093     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.95199999213219     
                   to: 136.272000014782     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.362948   1.567146   1.205029   0.278928
           0.057761   0.058382   0.051901   0.044514 [error]
 Peak      0.012691   0.047173   0.059741   0.021163
           0.004865   0.005360   0.005274   0.004159 [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 3.65e-07 6.44e-07 8.68e-07 2.41e-06 2.52e-06 4.29e-06   erg/cm2
              Error 2.93e-08 2.95e-08 5.20e-08 3.24e-07 1.22e-07 3.59e-07   erg/cm2
Peak flux Power-law 1.81e-01 2.90e-01 3.50e-01 8.28e-01 1.06e+00 1.65e+00   ph/cm2/s
              Error 4.57e-02 4.51e-02 4.01e-02 2.06e-01 1.22e-01 2.19e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.65e-07 6.44e-07 8.69e-07 2.39e-06 2.52e-06 4.27e-06   erg/cm2
              Error 2.94e-08 2.96e-08 5.21e-08 3.22e-07 1.22e-07 3.32e-07   erg/cm2
Peak flux Cutoff-PL 1.34e-01 2.99e-01 3.94e-01 3.62e-01 1.02e+00 1.19e+00   ph/cm2/s
              Error 5.81e-02 5.11e-02 5.63e-02 2.87e-01 1.27e-01 3.12e-01   ph/cm2/s
 
Fluence        Band 3.60e-07 6.41e-07 8.69e-07 2.42e-06 2.52e-06 4.31e-06   erg/cm2
              Error 1.90e-08 2.78e-08 4.38e-08 2.65e-07 1.15e-07 2.64e-07   erg/cm2
Peak flux      Band 1.35e-01 3.00e-01 3.94e-01 3.61e-01 1.02e+00 1.19e+00   ph/cm2/s
              Error 5.80e-02 5.11e-02 5.63e-02 2.82e-01 1.27e-01 3.12e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.568    0.085    -      -           1.91e-03 8.47e-05   60.525 57
CPL   1.533    0.125     670.1    0.0      1.98e-03 8.52e-05   60.730  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.728    0.196    -      -           9.19e-03 1.10e-03   58.764 57
CPL  -0.286    1.063     135.3  319.5      2.46e-02 3.15e-02   55.228 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: 31.552000 sec.
T50 in the 50-300 keV band: 13.760000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  140.224   -3.952  136.272
T90   106.304   -0.688  105.616
T50    38.208    7.312   45.520
Peak    1.000    2.300    3.300

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  314.2272 -62.4354 0.0050   12.0  -34.9       1.7026    37.8  TRIG_00319036       
------------------------------------------
 
Foreground time interval of the image:
 -3.952  13.173 (delta_t =  17.125 [sec])
Background time interval of the image:
-239.728  -3.952 (delta_t = 235.776 [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   -3.952 sec. to  136.272 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56777     ( -8.420241E-02   8.485603E-02) )
Norm@50keV  : 1.913572E-03    ( -8.487923E-05   8.443906E-05) )
------------------------------------------------------------
 Chi-Squared =      60.52514     using    59 PHA bins.
 Reduced chi-squared =      1.061845     for     57 degrees of freedom
 Null hypothesis probability = 0.350
 
Photon flux (15-150 keV)    in 140.2 sec: 0.243511 ( -0.010933  0.01097 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.5191e-06 ( -1.21133e-07  1.22717e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -3.952 sec. to  136.272 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53305     ( -0.129177   0.120926 )
Epeak [keV] : 670.086      (   )
Norm@50keV  : 1.978205E-03    ( -8.844724E-05   8.190039E-05) )
------------------------------------------------------------
 Chi-Squared =      60.73004     using    59 PHA bins.
 but latest trial   1.28079     gives Chi-Squared =   12.1245
 Reduced chi-squared =      1.084465     for     56 degrees of freedom
 Null hypothesis probability = 0.309
 
Photon flux (15-150 keV)    in 140.2 sec: 0.243393 ( -0.010928  0.010964 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.51962e-06 ( -1.21722e-07  1.22226e-07 ) ergs/cm2
 
Band function
Time interval is from   -3.952 sec. to  136.272 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.17183   ( -0.492470   11.9218 )
beta        : -1.57015    ( -8.485854E-02   8.421874E-02) )
Epeak [keV] : 49.1501      ( -49.0501 9950.85 )
Norm@50keV   : 3.846908E-03    ( -1.152155E-02   1.148552E-02) )
------------------------------------------------------------
 Chi-Squared =      60.53873     using    59 PHA bins.
 Reduced chi-squared =      1.100704     for     55 degrees of freedom
 Null hypothesis probability = 0.283
 
Photon flux (15-150 keV)    in 140.2 sec: 0.243349 ( -0.010716  0.010434 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.52032e-06 ( -1.21988e-07  1.07786e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    2.320 sec. to    3.280 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.728003     ( -0.200711   0.190545 )
Norm@50keV  : 9.186978E-03    ( -1.105790E-03   1.091014E-03) )
------------------------------------------------------------
 Chi-Squared =      58.76357     using    59 PHA bins.
 Reduced chi-squared =      1.030940     for     57 degrees of freedom
 Null hypothesis probability = 0.411
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.05977 ( -0.122088  0.12242 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06332e-07 ( -1.26777e-08  1.27229e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.320 sec. to    3.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.285940     ( -1.20363   0.922281 )
Epeak [keV] : 135.340      ( -42.6990 596.327 )
Norm@50keV  : 2.457887E-02    ( -1.438431E-02   4.852341E-02) )
------------------------------------------------------------
 Chi-Squared =      55.22818     using    59 PHA bins.
 Reduced chi-squared =     0.9862174     for     56 degrees of freedom
 Null hypothesis probability = 0.504
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.02445 ( -0.127577  0.127 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02058e-07 ( -1.41341e-08  1.37069e-08 ) ergs/cm2
 
Band function
Time interval is from    2.320 sec. to    3.280 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.11861   ( -8.88139   6.11861 )
beta        : -0.727995    ( -0.190527   0.200786 )
Epeak [keV] : 16.5188      ( -16.4188 9983.48 )
Norm@50keV   : 1.194010E-02    ( -4.44169   7.55823 )
------------------------------------------------------------
 Chi-Squared =      58.76358     using    59 PHA bins.
 Reduced chi-squared =      1.068429     for     55 degrees of freedom
 Null hypothesis probability = 0.339
 
Photon flux (15-150 keV)    in 0.9600 sec: 1.02433 ( -0.127458  0.12732 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0194e-07 ( -1.40455e-08  1.37664e-08 ) ergs/cm2
 
Plot creation:
Tue Aug  5 14:29:55 EDT 2008