batgrbproduct Analysis for Trigger=154630

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jan  8 20:41:22 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger154630/GCN5_download_cron
======================================================================

  Trigger: 00154630      Segment: 000

  BAT Trigger Time: 148147173.568   [s; MET]
      Trigger Stop: 148147174.08   [s; MET]
               UTC: 2005-09-11T15:59:33.844660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 13.6918901114025   Dec: -38.8605504101289  [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:     18.8414436814168  [ if not an image trigger ]
     Image S/N Ratio:    8.81

  Flight Position:   [ source = BAT ]
    RA: 13.6918901114025   Dec: -38.8605504101289  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 13.710772872614   Dec: -38.8602240889795  [deg; J2000]  
        { 00h 54m 50.6s , -38d 51' 36.8" }
         +/- 2.39021717858509 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.03771927946795 [arcmin] (formal 1-sigma fit error)
    SNR: 8.75978758574323
    RA  =   0h 54m 50.6s  (13.710773 deg.)
    Dec = -38d 51' 37" (-38.860224 deg.)
 
  Angular difference between Flight and Ground position is 0.882432 arcmin
 
  Partial Coding Fraction: 0.4296875    [ including projection effects ]

  Duration
     T90: 15.7360000014305 +/- 0.867910115130624
        Measured from: -0.751999974250793
                   to: 14.9840000271797     [s; relative to TRIGTIME]
     T50: 12.6200000047684 +/- 1.32073464953831
        Measured from: 0.188000023365021
                   to: 12.8080000281334     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.104000002145767     
                   to: 0.895999997854233     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.995999991893768     
                   to: 15.9680000245571     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.204069   0.213120   0.126652   0.006637
           0.028660   0.029321   0.025827   0.022951 [error]
 Peak      0.062697   0.050853   0.039381   0.009885
           0.008141   0.007965   0.007146   0.005826 [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 6.05e-08 9.05e-08 1.01e-07 2.15e-07 3.17e-07 4.70e-07   erg/cm2
              Error 1.35e-08 1.36e-08 2.52e-08 1.09e-07 5.81e-08 1.34e-07   erg/cm2
Peak flux Power-law 5.74e-01 4.44e-01 2.30e-01 1.73e-01 1.33e+00 1.42e+00   ph/cm2/s
              Error 1.31e-01 6.74e-02 5.93e-02 8.66e-02 2.02e-01 2.18e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.98e-08 9.16e-08 1.01e-07 1.87e-07 3.15e-07 3.89e-07   erg/cm2
              Error 1.41e-08 1.68e-08 2.64e-08 1.38e-07 5.80e-08 1.80e-07   erg/cm2
Peak flux Cutoff-PL 5.73e-01 4.44e-01 2.30e-01 1.71e-01 1.33e+00 1.42e+00   ph/cm2/s
              Error 1.31e-01 6.74e-02 5.93e-02 8.60e-02 2.02e-01 2.18e-01   ph/cm2/s
 
Fluence        Band 5.98e-08 9.33e-08 9.71e-08 1.85e-07 3.11e-07 4.31e-07   erg/cm2
              Error 1.48e-08 1.82e-08 1.84e-08 1.06e-07 6.11e-08 1.46e-07   erg/cm2
Peak flux      Band 5.72e-01 4.44e-01 2.31e-01 1.73e-01 1.33e+00 1.42e+00   ph/cm2/s
              Error 1.07e-01 6.74e-02 4.26e-02 1.82e-01 2.01e-01 8.64e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.837    0.284    -      -           2.03e-03 3.68e-04   44.843 57
CPL   1.687    0.903      89.1 5000.0      2.47e-03 5.00e+23   44.848  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.946    0.301    -      -           9.07e-03 1.74e-03   49.582 57
CPL   1.926    0.844     154.5    0.0      9.32e-03 1.75e-03   49.594  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   16.964   -0.996   15.968
T90    15.736   -0.752   14.984
T50    12.620    0.188   12.808
Peak    1.000   -0.104    0.896

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   13.7108 -38.8602 0.0220   28.3   74.5       0.4934     8.8  TRIG_00154630       
------------------------------------------
 
Foreground time interval of the image:
 -0.996  15.968 (delta_t =  16.964 [sec])
Background time interval of the image:
-299.568 -229.048 (delta_t =  70.520 [sec])
-227.568 -221.860 (delta_t =   5.708 [sec])
-220.568 -211.932 (delta_t =   8.636 [sec])
-210.568 -131.888 (delta_t =  78.680 [sec])
-130.568 -130.042 (delta_t =   0.526 [sec])
-128.568  -0.996 (delta_t = 127.572 [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   -0.996 sec. to   15.968 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.83713     ( -0.276558   0.291786 )
Norm@50keV  : 2.032959E-03    ( -3.740765E-04   3.615797E-04) )
------------------------------------------------------------
 Chi-Squared =      44.84253     using    59 PHA bins.
 Reduced chi-squared =     0.7867111     for     57 degrees of freedom
 Null hypothesis probability = 0.879
 
Photon flux (15-150 keV)    in 16.96 sec: 0.284272 ( -0.042936  0.042947 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.17079e-07 ( -5.72977e-08  5.89326e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.996 sec. to   15.968 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68662     ( -1.14163   0.665202 )
Epeak [keV] : 89.0583      ( -89.0483 9910.94 )
Norm@50keV  : 2.470843E-03    ( -2.470843E-03   1.000000E+24) )
------------------------------------------------------------
 Chi-Squared =      44.84768     using    59 PHA bins.
 but latest trial   2.07540     gives Chi-Squared =  0.234001
 Reduced chi-squared =     0.8008514     for     56 degrees of freedom
 Null hypothesis probability = 0.857
 
Photon flux (15-150 keV)    in 16.96 sec: 0.283650 ( -0.042712  0.042713 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.14774e-07 ( -5.49097e-08  6.10628e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.996 sec. to   15.968 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.785780   ( -9.21422   4.67735 )
beta        : -1.97557    ( -8.02443   0.380910 )
Epeak [keV] : 34.1252      ( -34.0252 745.123 )
Norm@50keV   : 1.087672E-02    ( -182.583   103.742 )
------------------------------------------------------------
 Chi-Squared =      44.21790     using    59 PHA bins.
 Reduced chi-squared =     0.8039619     for     55 degrees of freedom
 Null hypothesis probability = 0.851
 
Photon flux (15-150 keV)    in 16.96 sec: 0.284787 ( -0.043713  0.043218 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.11286e-07 ( -6.15275e-08  6.06778e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.104 sec. to    0.896 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.94610     ( -0.289951   0.312573 )
Norm@50keV  : 9.066189E-03    ( -1.781984E-03   1.703008E-03) )
------------------------------------------------------------
 Chi-Squared =      49.58171     using    59 PHA bins.
 Reduced chi-squared =     0.8698545     for     57 degrees of freedom
 Null hypothesis probability = 0.747
 
Photon flux (15-150 keV)    in 1.000 sec: 1.32731 ( -0.20214  0.20221 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.3466e-08 ( -1.53675e-08  1.57178e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.104 sec. to    0.896 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.92592     ( -1.02183   0.665979 )
Epeak [keV] : 154.487      (   )
Norm@50keV  : 9.315049E-03    ( -1.789015E-03   1.714682E-03) )
------------------------------------------------------------
 Chi-Squared =      49.59398     using    59 PHA bins.
 but latest trial   2.59185     gives Chi-Squared =   1.76498
 but latest trial   7.85359     gives Chi-Squared =  7.278442E-03
 Reduced chi-squared =     0.8856068     for     56 degrees of freedom
 Null hypothesis probability = 0.714
 
Photon flux (15-150 keV)    in 1.000 sec: 1.32687 ( -0.20207  0.20215 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.33823e-08 ( -1.5288e-08  1.58052e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.104 sec. to    0.896 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.44448   ( -8.55552   5.13835 )
beta        : -1.97009    ( -8.02991   0.310726 )
Epeak [keV] : 27.3915      ( -27.2915 9972.61 )
Norm@50keV   : 2.168079E-02    ( -1.409717E-02   35712.3 )
------------------------------------------------------------
 Chi-Squared =      49.51939     using    59 PHA bins.
 Reduced chi-squared =     0.9003525     for     55 degrees of freedom
 Null hypothesis probability = 0.683
 
Photon flux (15-150 keV)    in 1.000 sec: 1.32725 ( -0.20112  0.20133 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.30368e-08 ( -1.89418e-08  1.26086e-08 ) ergs/cm2
 
Plot creation:
Tue Jan  8 20:50:45 EST 2008