batgrbproduct Analysis for Trigger=103780

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Jan  4 20:05:43 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger103780/GCN_download_cron
======================================================================

  Trigger: 00103780      Segment: 000

  BAT Trigger Time: 128433653.44   [s; MET]
      Trigger Stop: 128433661.632   [s; MET]
               UTC: 2005-01-26T12:00:54.073440    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 278.10963730402   Dec: 42.3890098675932  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8062484748657  [ if not an image trigger ]
     Image S/N Ratio:    12

  Flight Position:   [ source = BAT ]
    RA: 278.10963730402   Dec: 42.3890098675932  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 278.128333238863   Dec: 42.3894816750991  [deg; J2000]  
        { 18h 32m 30.8s , +42d 23' 22.1" }
         +/- 1.61895479165365 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.712648523218672 [arcmin] (formal 1-sigma fit error)
    SNR: 15.2831063409632
    RA  =  18h 32m 30.8s  (278.128333 deg.)
    Dec =  42d 23' 22" (42.389482 deg.)
 
  Angular difference between Flight and Ground position is 0.828992 arcmin
 
  Partial Coding Fraction: 0.421875    [ including projection effects ]

  Duration
     T90: 48 +/- 22.6274169979695
        Measured from: -11.4399999976158
                   to: 36.5600000023842     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: 4.56000000238419
                   to: 20.5600000023842     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 12.0600000023842     
                   to: 13.0600000023842     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -11.4399999976158     
                   to: 36.5600000023842     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.253616   0.570621   0.406246   0.095949
           0.045838   0.047826   0.042130   0.034905 [error]
 Peak      0.148987   0.277947   0.263264   0.052244
           0.026799   0.028188   0.024848   0.020133 [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 1.02e-07 2.05e-07 3.18e-07 1.09e-06 8.87e-07 1.69e-06   erg/cm2
              Error 1.85e-08 2.29e-08 3.97e-08 2.91e-07 9.93e-08 3.20e-07   erg/cm2
Peak flux Power-law 1.08e-01 1.24e-01 1.03e-01 1.45e-01 3.87e-01 4.80e-01   ph/cm2/s
              Error 2.18e-02 1.55e-02 1.24e-02 3.65e-02 4.26e-02 5.17e-02   ph/cm2/s
 
Fluence   Cutoff-PL 8.97e-08 2.24e-07 3.38e-07 3.81e-07 8.44e-07 1.05e-06   erg/cm2
              Error 2.14e-08 2.90e-08 4.63e-08 3.60e-07 1.08e-07 3.68e-07   erg/cm2
Peak flux Cutoff-PL 9.56e-02 1.29e-01 1.10e-01 8.73e-02 3.80e-01 4.23e-01   ph/cm2/s
              Error 2.63e-02 1.76e-02 1.53e-02 6.04e-02 4.36e-02 8.89e-02   ph/cm2/s
 
Fluence        Band 8.79e-08 2.31e-07 3.16e-07 8.15e-07 8.62e-07 1.46e-06   erg/cm2
              Error 2.22e-08 2.75e-08 3.94e-08 3.09e-07 9.42e-08 3.40e-07   erg/cm2
Peak flux      Band 9.56e-02 1.29e-01 1.10e-01 8.73e-02 3.80e-01 4.22e-01   ph/cm2/s
              Error 2.63e-02 1.76e-02 1.53e-02 6.04e-02 4.36e-02 7.51e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.365    0.170    -      -           1.90e-03 1.95e-04   85.061 57
CPL   0.545    0.774      90.3   98.8      4.89e-03 6.11e-03   80.735  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.267    0.181    -      -           3.27e-03 3.43e-04   73.898 57
CPL   0.742    0.718     131.1 4959.5      5.77e-03 5.12e-03   72.179 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: 16.512000 sec.
T50 in the 50-300 keV band: 9.152000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   48.000  -11.440   36.560
T90    48.000  -11.440   36.560
T50    16.000    4.560   20.560
Peak    1.000   12.060   13.060

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  278.1283 +42.3895 0.0126   30.2  -77.9       1.4234    15.3  TRIG_00103780       
------------------------------------------
 
Foreground time interval of the image:
-11.440  36.560 (delta_t =  48.000 [sec])
Background time interval of the image:
-299.440 -11.440 (delta_t = 288.000 [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  -11.440 sec. to   36.560 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36501     ( -0.170997   0.169546 )
Norm@50keV  : 1.898830E-03    ( -1.948751E-04   1.946326E-04) )
------------------------------------------------------------
 Chi-Squared =      85.06108     using    59 PHA bins.
 Reduced chi-squared =      1.492300     for     57 degrees of freedom
 Null hypothesis probability = 9.387E-03
 
Photon flux (15-150 keV)    in 48.00 sec: 0.229472 ( -0.024219  0.024271 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.87237e-07 ( -9.8976e-08  9.96864e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -11.440 sec. to   36.560 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.545362     ( -0.810771   0.737961 )
Epeak [keV] : 90.3247      ( -24.0613 173.503 )
Norm@50keV  : 4.888807E-03    ( -4.888807E-03   7.332360E-03) )
------------------------------------------------------------
 Chi-Squared =      80.73486     using    59 PHA bins.
 but latest trial   1.22843     gives Chi-Squared =   4.77738
 Reduced chi-squared =      1.441694     for     56 degrees of freedom
 Null hypothesis probability = 1.691E-02
 
Photon flux (15-150 keV)    in 48.00 sec: 0.223669 ( -0.024716  0.024759 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.44378e-07 ( -1.08091e-07  1.08038e-07 ) ergs/cm2
 
Band function
Time interval is from  -11.440 sec. to   36.560 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.545382   ( -0.684827   0.811647 )
beta        : -9.36345    ( -0.636548   11.0466 )
Epeak [keV] : 90.2957      ( -24.0606 173.266 )
Norm@50keV   : 4.889978E-03    ( -4.889978E-03   7.337192E-03) )
------------------------------------------------------------
 Chi-Squared =      80.73471     using    59 PHA bins.
 Reduced chi-squared =      1.467904     for     55 degrees of freedom
 Null hypothesis probability = 1.349E-02
 
Photon flux (15-150 keV)    in 48.00 sec: 0.223631 ( -0.024686  0.0248 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.61787e-07 ( -9.55152e-08  9.28512e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    4.560 sec. to   20.560 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26701     ( -0.182160   0.179263 )
Norm@50keV  : 3.266542E-03    ( -3.427246E-04   3.427002E-04) )
------------------------------------------------------------
 Chi-Squared =      73.89841     using    59 PHA bins.
 Reduced chi-squared =      1.296463     for     57 degrees of freedom
 Null hypothesis probability = 6.554E-02
 
Photon flux (15-150 keV)    in 16.00 sec: 0.387440 ( -0.042528  0.042645 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.20699e-07 ( -5.89552e-08  5.93696e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.560 sec. to   20.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.742459     ( -0.804817   0.630635 )
Epeak [keV] : 131.147      ( -50.1355 9868.85 )
Norm@50keV  : 5.770566E-03    ( -2.700043E-03   7.546762E-03) )
------------------------------------------------------------
 Chi-Squared =      72.17919     using    59 PHA bins.
 Reduced chi-squared =      1.288914     for     56 degrees of freedom
 Null hypothesis probability = 7.161E-02
 
Photon flux (15-150 keV)    in 16.00 sec: 0.380381 ( -0.043602  0.043629 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.09104e-07 ( -6.26112e-08  6.1984e-08 ) ergs/cm2
 
Band function
Time interval is from    4.560 sec. to   20.560 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.740856   ( -0.632216   0.803331 )
beta        : -9.18233    ( -0.817671   8.02967 )
Epeak [keV] : 130.893      ( -49.8968 9869.11 )
Norm@50keV   : 5.780221E-03    ( -2.710441E-03   7.540503E-03) )
------------------------------------------------------------
 Chi-Squared =      72.17919     using    59 PHA bins.
 Reduced chi-squared =      1.312349     for     55 degrees of freedom
 Null hypothesis probability = 5.996E-02
 
Photon flux (15-150 keV)    in 16.00 sec: 0.380396 ( -0.04362  0.043645 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.08715e-07 ( -6.25024e-08  6.20592e-08 ) ergs/cm2
 
Plot creation:
Fri Jan  4 20:17:30 EST 2008