batgrbproduct Analysis for Trigger=303436

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sun Feb 17 13:38:20 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger303436/GCN5_download_cron
======================================================================

  Trigger: 00303436      Segment: 000

  BAT Trigger Time: 224894640   [s; MET]
      Trigger Stop: 224894704   [s; MET]
               UTC: 2008-02-16T22:43:57.420220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 267.302893633731   Dec: -26.6213280868123  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    10.31
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.31

  Flight Position:   [ source = BAT ]
    RA: 267.302893633731   Dec: -26.6213280868123  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 267.297025865001   Dec: -26.6490782976636  [deg; J2000]  
        { 17h 49m 11.3s , -26d 38' 56.7" }
         +/- 2.64819809284232 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.52082306977211 [arcmin] (formal 1-sigma fit error)
    SNR: 7.5666461524506
    RA  =  17h 49m 11.3s  (267.297026 deg.)
    Dec = -26d 38' 57" (-26.649078 deg.)
 
  Angular difference between Flight and Ground position is 1.694493 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.492451   0.237291  -0.039783   0.022445
           0.048479   0.041959   0.034975   0.029556 [error]
 Peak      0.492451   0.237291  -0.039783   0.022445
           0.048479   0.041959   0.034975   0.029556 [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 1.47e-07 7.94e-08 2.68e-08 1.17e-08 2.60e-07 2.65e-07   erg/cm2
              Error 2.48e-08 2.14e-08 1.52e-08 1.20e-08 5.11e-08 5.56e-08   erg/cm2
Peak flux Power-law 7.74e-02 2.37e-02 4.01e-03 7.82e-04 1.06e-01 1.06e-01   ph/cm2/s
              Error 1.33e-02 6.06e-03 2.20e-03 8.95e-04 1.71e-02 1.72e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.51e-07 8.28e-08 5.43e-09 1.37e-11 2.40e-07 2.40e-07   erg/cm2
              Error 2.70e-08 2.64e-08 1.10e-08 1.20e-09 4.24e-08 4.24e-08   erg/cm2
Peak flux Cutoff-PL 7.83e-02 2.56e-02 9.24e-04 1.25e-06 1.05e-01 1.05e-01   ph/cm2/s
              Error 1.45e-02 7.52e-03 1.76e-03 9.60e-05 1.65e-02 1.67e-02   ph/cm2/s
 
Fluence        Band 1.46e-07 7.81e-08 2.61e-08 1.13e-08 2.57e-07 2.62e-07   erg/cm2
              Error 2.42e-08 1.68e-08 1.09e-08 1.03e-08 3.29e-08 4.51e-08   erg/cm2
Peak flux      Band 7.68e-02 2.43e-02 4.29e-03 9.21e-04 1.09e-01 1.04e-01   ph/cm2/s
              Error 1.25e-02 2.98e-03 1.45e-03 4.93e-04 1.74e-02 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.564    0.475    -      -           2.48e-04 1.08e-04   66.168 57
CPL   0.339    3.021      13.4    7.8      6.28e-02 5.32e+00   61.472  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.564    0.475    -      -           2.48e-04 1.08e-04   66.168 57
CPL   0.339    2.539      13.4    7.8      6.28e-02 5.32e+00   61.472  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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  267.2970 -26.6491 0.0253    4.2 -135.7       0.6676     7.6  TRIG_00303436       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.56448     ( -0.438280   0.511671 )
Norm@50keV  : 2.477915E-04    ( -9.837214E-05   1.170234E-04) )
------------------------------------------------------------
 Chi-Squared =      66.16850     using    59 PHA bins.
 Reduced chi-squared =      1.160851     for     57 degrees of freedom
 Null hypothesis probability = 0.190
 
Photon flux (15-150 keV)    in 64.00 sec: 0.105624 ( -0.0171338  0.017163 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.59624e-07 ( -4.9497e-08  5.27226e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.339486     ( -3.33949   2.70337 )
Epeak [keV] : 13.3903      ( -10.5753 4.98560 )
Norm@50keV  : 6.284638E-02    ( -6.284638E-02   10.5857 )
------------------------------------------------------------
 Chi-Squared =      61.47199     using    59 PHA bins.
 but latest trial   4.10152     gives Chi-Squared =  0.730434
 Reduced chi-squared =      1.097714     for     56 degrees of freedom
 Null hypothesis probability = 0.286
 
Photon flux (15-150 keV)    in 64.00 sec: 0.104814 ( -0.016566  0.016478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.3977e-07 ( -4.11616e-08  4.37024e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.69973   ( -7.56661   0.366832 )
beta        : -8.94064    ( -0.511274   0.439435 )
Epeak [keV] : 7.73115      ( -7.63115 9992.27 )
Norm@50keV   : 2.705506E-03    ( -3.150508E-02   0.829754 )
------------------------------------------------------------
 Chi-Squared =      70.38883     using    59 PHA bins.
 Reduced chi-squared =      1.279797     for     55 degrees of freedom
 Null hypothesis probability = 7.906E-02
 
Photon flux (15-150 keV)    in 64.00 sec: 0.108539 ( -0.0173741  0.017349 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57404e-07 ( -4.11392e-08  2.47386e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.56448     ( -0.438280   0.511671 )
Norm@50keV  : 2.477915E-04    ( -9.837214E-05   1.170234E-04) )
------------------------------------------------------------
 Chi-Squared =      66.16850     using    59 PHA bins.
 Reduced chi-squared =      1.160851     for     57 degrees of freedom
 Null hypothesis probability = 0.190
 
Photon flux (15-150 keV)    in 64.00 sec: 0.105624 ( -0.0171338  0.017163 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.59624e-07 ( -4.9497e-08  5.27226e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.339486     ( -3.33949   1.73755 )
Epeak [keV] : 13.3903      ( -10.5753 4.98560 )
Norm@50keV  : 6.284638E-02    ( -6.284638E-02   10.5857 )
------------------------------------------------------------
 Chi-Squared =      61.47199     using    59 PHA bins.
 but latest trial   4.10152     gives Chi-Squared =  0.730434
 Reduced chi-squared =      1.097714     for     56 degrees of freedom
 Null hypothesis probability = 0.286
 
Photon flux (15-150 keV)    in 64.00 sec: 0.104814 ( -0.016566  0.016478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.3977e-07 ( -4.11616e-08  4.37024e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.69973   ( -7.56661   0.366832 )
beta        : -8.94064    (     )
Epeak [keV] : 7.73115      (   )
Norm@50keV   : 2.705506E-03    (     )
------------------------------------------------------------
 Chi-Squared =      70.38883     using    59 PHA bins.
 Reduced chi-squared =      1.279797     for     55 degrees of freedom
 Null hypothesis probability = 7.906E-02
 
Photon flux (15-150 keV)    in 64.00 sec: 0.108539 ( -0.0173741  0.017349 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57404e-07 ( -4.11392e-08  2.47386e-08 ) ergs/cm2
 
Plot creation:
Sun Feb 17 14:20:31 EST 2008