batgrbproduct Analysis for Trigger=306829

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Mar 20 10:01:00 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger306829/GCN5_download_cron
======================================================================

  Trigger: 00306829      Segment: 000

  BAT Trigger Time: 227659488   [s; MET]
      Trigger Stop: 227659552   [s; MET]
               UTC: 2008-03-19T22:44:45.344620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 252.002678827311   Dec: -45.1717800458437  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.02
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.02

  Flight Position:   [ source = BAT ]
    RA: 252.002678827311   Dec: -45.1717800458437  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 251.817466385136   Dec: -45.0870259669037  [deg; J2000]  
        { 16h 47m 16.2s , -45d 05' 13.3" }
         +/- 5.50086093993599 [arcmin] (estimated 90% radius based on SNR)
         +/- 4.07124423504392 [arcmin] (formal 1-sigma fit error)
    SNR: 2.662933280237
    RA  =  16h 47m 16.2s  (251.817466 deg.)
    Dec =  -45d  5' 13" (-45.087026 deg.)
 
  Angular difference between Flight and Ground position is 9.344908 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 55.6520000100136 +/- 37.8739097576011
        Measured from: -70.6520000100136
                   to: -15     [s; relative to TRIGTIME]
     T50: 30.0079999864101 +/- 37.8582850306054
        Measured from: -67.9359999895096
                   to: -37.9280000030994     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -70.7579999864101     
                   to: -69.7579999864101     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -70.7039999961853     
                   to: -0.916000008583069     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.405696   0.251787   0.142894  -0.031844
           0.065382   0.059744   0.050812   0.043847 [error]
 Peak      0.021081   0.031689   0.045879   0.003575
           0.015174   0.015200   0.013410   0.011504 [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 1.19e-07 1.02e-07 6.01e-08 5.29e-08 3.04e-07 3.33e-07   erg/cm2
              Error 3.05e-08 3.15e-08 3.90e-08 6.74e-08 9.34e-08 1.31e-07   erg/cm2
Peak flux Power-law 1.07e-01 1.78e-01 2.24e-01 5.66e-01 6.67e-01 1.07e+00   ph/cm2/s
              Error 1.61e-01 1.47e-01 1.63e-01 7.92e-01 3.66e-01 6.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.19e-07 1.02e-07 6.00e-08 5.25e-08 3.04e-07 3.34e-07   erg/cm2
              Error 3.05e-08 3.16e-08 3.90e-08 6.68e-08 9.34e-08 1.31e-07   erg/cm2
Peak flux Cutoff-PL 1.06e-01 1.77e-01 2.25e-01 5.63e-01 6.66e-01 1.07e+00   ph/cm2/s
              Error 1.60e-01 1.47e-01 1.64e-01 7.90e-01 3.66e-01 4.91e-01   ph/cm2/s
 
Fluence        Band 1.20e-07 1.01e-07 5.68e-08 4.73e-08 3.00e-07 3.29e-07   erg/cm2
              Error 3.08e-08 2.99e-08 3.37e-08 3.96e-08 7.78e-08 0.00e+00   erg/cm2
Peak flux      Band 1.27e-01 1.88e-01 2.24e-01 5.80e-01 6.62e-01 9.89e-01   ph/cm2/s
              Error 1.01e-01 1.02e-01 3.73e-01 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.764    0.614    -      -           4.00e-04 1.92e-04   59.071 57
CPL   1.932    1.168       2.8   21.4      1.38e-03 2.88e-02   60.052  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.664    1.209    -      -           5.75e-03 3.57e-03   76.313 57
CPL   0.652    1.223    9988.2 5000.0      5.79e-03 3.59e-03   76.318 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   69.788  -70.704   -0.916
T90    55.652  -70.652  -15.000
T50    30.008  -67.936  -37.928
Peak    1.000  -70.758  -69.758

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  251.8175 -45.0870 0.0718    0.2  109.5       0.0568     2.7  TRIG_00306829       
------------------------------------------
 
Foreground time interval of the image:
 -6.799  -0.916 (delta_t =   5.883 [sec])
Background time interval of the image:

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  -70.704 sec. to   -0.916 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.76384     ( -0.538948   0.688318 )
Norm@50keV  : 3.996192E-04    ( -1.872688E-04   1.961658E-04) )
------------------------------------------------------------
 Chi-Squared =      59.07099     using    59 PHA bins.
 Reduced chi-squared =      1.036333     for     57 degrees of freedom
 Null hypothesis probability = 0.400
 
Photon flux (15-150 keV)    in 69.79 sec: 9.313123E-02 ( -0.0207264  0.0207688 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.03621e-07 ( -8.85314e-08  9.8205e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -70.704 sec. to   -0.916 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93180     ( -2.05223   0.282885 )
Epeak [keV] : 2.76522      ( -2.59945 40.2122 )
Norm@50keV  : 1.376384E-03    ( -1.376384E-03   5.625515E-02) )
------------------------------------------------------------
 Chi-Squared =      60.05175     using    59 PHA bins.
 but latest trial  -2.96073     gives Chi-Squared =   2.56115
 but latest trial   73.2025     gives Chi-Squared =   3.80135
 Reduced chi-squared =      1.072353     for     56 degrees of freedom
 Null hypothesis probability = 0.331
 
Photon flux (15-150 keV)    in 69.79 sec: 9.309200E-02 ( -0.0207192  0.020761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.03559e-07 ( -8.85077e-08  9.82085e-08 ) ergs/cm2
 
Band function
Time interval is from  -70.704 sec. to   -0.916 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.74982   ( -9.30449   5.69551 )
beta        : -9.21920    ( -0.911664   0.538370 )
Epeak [keV] : 10.3286      ( -10.2283 12.6115 )
Norm@50keV   : 1.552898E-03    ( -3.193370E-02   92.4542 )
------------------------------------------------------------
 Chi-Squared =      60.55571     using    59 PHA bins.
 Reduced chi-squared =      1.101013     for     55 degrees of freedom
 Null hypothesis probability = 0.282
 
Photon flux (15-150 keV)    in 69.79 sec: 9.309187E-02 ( -0.0207191  0.0207611 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99792e-07 ( -8.53392e-08  7.02925e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  -70.704 sec. to  -69.812 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.664063     ( -1.35414   1.06399 )
Norm@50keV  : 5.751332E-03    ( -3.867274E-03   3.279643E-03) )
------------------------------------------------------------
 Chi-Squared =      76.31336     using    59 PHA bins.
 Reduced chi-squared =      1.338831     for     57 degrees of freedom
 Null hypothesis probability = 4.473E-02
 
Photon flux (15-150 keV)    in 0.8920 sec: 0.666872 ( -0.353621  0.378168 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.36459e-08 ( -2.94153e-08  2.93085e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -70.704 sec. to  -69.812 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.652493     ( -1.37091   1.07479 )
Epeak [keV] : 9988.23      ( -9988.22 11.7676 )
Norm@50keV  : 5.791446E-03    ( -3.885404E-03   3.290247E-03) )
------------------------------------------------------------
 Chi-Squared =      76.31774     using    59 PHA bins.
 Reduced chi-squared =      1.362817     for     56 degrees of freedom
 Null hypothesis probability = 3.686E-02
 
Photon flux (15-150 keV)    in 0.8920 sec: 0.666246 ( -0.353187  0.378104 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.36754e-08 ( -2.94599e-08  2.93566e-08 ) ergs/cm2
 
Band function
Time interval is from  -70.704 sec. to  -69.812 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.844226   ( -9.15577   5.84423 )
beta        : -0.666283    ( -1.06178   1.35644 )
Epeak [keV] : 13.4148      ( -13.3148 9986.58 )
Norm@50keV   : 8.776452E-03    ( -8.776451E-03   170717. )
------------------------------------------------------------
 Chi-Squared =      76.31341     using    59 PHA bins.
 Reduced chi-squared =      1.387516     for     55 degrees of freedom
 Null hypothesis probability = 3.016E-02
 
Photon flux (15-150 keV)    in 0.8920 sec: 0.661906 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.57625e-08 ( -2.56852e-08  2.56944e-08 ) ergs/cm2
 
Plot creation:
Thu Mar 20 10:16:50 EDT 2008