batgrbproduct Analysis for Trigger=378831

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Fri Dec 11 02:22:13 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger378831/GCN5_download_cron
======================================================================

  Trigger: 00378831      Segment: 000

  BAT Trigger Time: 282132592.896   [s; MET]
      Trigger Stop: 282132592.96   [s; MET]
               UTC: 2009-12-10T10:09:47.561060    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 84.71140575838   Dec: 26.3087895353856  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    10
     Image Trigger?:     NO
     Rate S/N Ratio:     10.3923048454133  [ if not an image trigger ]
     Image S/N Ratio:    10

  Flight Position:   [ source = BAT ]
    RA: 84.71140575838   Dec: 26.3087895353856  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 84.7166349215486   Dec: 26.3117769730589  [deg; J2000]  
        { 05h 38m 52.0s , +26d 18' 42.4" }
         +/- 0.410354608371218 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.0922021082533878 [arcmin] (formal 1-sigma fit error)
    SNR: 108.579523136979
 
  Angular difference between Flight and Ground position is 0.333511 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 238.443999946117 +/- 2.25920696510256
        Measured from: -62.6399999260902
                   to: 175.804000020027     [s; relative to TRIGTIME]
     T50: 127.803999960423 +/- 1.78240287255051
        Measured from: -9.25599992275238
                   to: 118.54800003767     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.236000001430511     
                   to: 0.763999998569489     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -77.7560000419617     
                   to: 308.163999974728     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    24.464138  19.456964   3.234766   0.127478
           0.124504   0.122029   0.094257   0.079343 [error]
 Peak      0.161768   0.145301   0.024280  -0.000014
           0.007524   0.007342   0.005046   0.004116 [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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux Power-law 1.74e+00 8.79e-01 2.74e-01 1.09e-01 2.95e+00 3.00e+00   ph/cm2/s
              Error 1.45e-01 6.17e-02 3.61e-02 2.55e-02 1.97e-01 1.99e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.88e-06 7.82e-06 2.28e-06 1.30e-07 1.81e-05 1.81e-05   erg/cm2
              Error 4.39e-07 1.72e-07 1.25e-07 3.67e-08 5.39e-07 5.41e-07   erg/cm2
Peak flux Cutoff-PL 1.52e+00 1.11e+00 1.51e-01 1.83e-03 2.79e+00 2.79e+00   ph/cm2/s
              Error 1.66e-01 9.03e-02 5.03e-02 3.44e-03 2.00e-01 2.00e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 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    3.246    0.000    -      -           5.84e-03 0.00e+00  339.940 57
CPL   1.000    0.000      50.0    0.0      1.67e-02 0.00e+00 2154.400 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.680    0.131    -      -           1.34e-02 1.36e-03   90.190 57
CPL  -0.398    1.117      25.8    3.0      1.37e+00 4.53e+00   49.500 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: 171.136000 sec.
T50 in the 50-300 keV band: 107.712000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  385.920  -77.756  308.164
T90   238.444  -62.640  175.804
T50   127.804   -9.256  118.548
Peak    1.000   -0.236    0.764

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   84.7166 +26.3118 0.0018    0.0 -119.6      34.9461   108.6  TRIG_00378831       
------------------------------------------
 
Foreground time interval of the image:
-10.595 182.180 (delta_t = 192.775 [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
Multiple GTIs in the spectrum
tstart tstop
-77.756000 182.179800
300.104000 308.164000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.24604     (     )
Norm@50keV  : 5.83587E-03    (     )
------------------------------------------------------------
# Chi-Squared =         339.94 using 59 PHA bins.
# Reduced chi-squared =         5.9639 for     57 degrees of freedom 
# Null hypothesis probability =   6.839175e-42
 
Photon flux (15-150 keV)    in 268 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-77.756000 182.179800
300.104000 308.164000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.66999E-02    (     )
------------------------------------------------------------
# Chi-Squared =        2154.40 using 59 PHA bins.
# Reduced chi-squared =        38.4714 for     56 degrees of freedom 
# Null hypothesis probability =   0.000000e+00
 
Photon flux (15-150 keV)    in 268 sec: 1.59321 ( -0.06031  0.06109 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.8101e-05 ( -5.36375e-07  5.41172e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-77.756000 182.179800
300.104000 308.164000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.249858   ( -0.915888   1.17859 )
beta        : -4.33598    ( -0.314302   0.4164 )
Epeak [keV] : 21.8917      ( -5.32635 1.55472 )
Norm@50keV   : 0.340302    ( -0.17197   1.44477 )
------------------------------------------------------------
# Chi-Squared =          59.30 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     55 degrees of freedom 
# Null hypothesis probability =   3.215669e-01
 
Photon flux (15-150 keV)    in 268 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.236 sec. to    0.764 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.68005     ( -0.128168   0.133882 )
Norm@50keV  : 1.34033E-02    ( -0.00136239   0.00136276 )
------------------------------------------------------------
# Chi-Squared =          90.19 using 59 PHA bins.
# Reduced chi-squared =          1.582 for     57 degrees of freedom 
# Null hypothesis probability =   3.339899e-03
 
Photon flux (15-150 keV)    in 1 sec: 2.95221 ( -0.196778  0.196882 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41613e-07 ( -1.03863e-08  1.04924e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.236 sec. to    0.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.398184     ( -1.23099   1.00338 )
Epeak [keV] : 25.8309      ( -3.57433 2.33412 )
Norm@50keV  : 1.37455    ( -1.11304   7.94389 )
------------------------------------------------------------
# Chi-Squared =          49.50 using 59 PHA bins.
# Reduced chi-squared =         0.8838 for     56 degrees of freedom 
# Null hypothesis probability =   7.178734e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.78933 ( -0.19929  0.19998 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22245e-07 ( -9.23e-09  9.577e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.236 sec. to    0.764 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.91684   ( -1.09681   0.82126 )
beta        : -3.86572    ( 10   19.9984 )
Epeak [keV] : 26.0560      ( -1.95654 2.05211 )
Norm@50keV   : 17.5665    ( -17.2572   937.39 )
------------------------------------------------------------
# Chi-Squared =          47.24 using 59 PHA bins.
# Reduced chi-squared =         0.8590 for     55 degrees of freedom 
# Null hypothesis probability =   7.620992e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Fri Dec 11 02:41:48 EST 2009