batgrbproduct Analysis for Trigger=348929

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.44
    Process Start Time (local time): Fri Apr 10 21:02:28 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger348929/GCN5_download_cron
======================================================================

  Trigger: 00348929      Segment: 000

  BAT Trigger Time: 261075477.504   [s; MET]
      Trigger Stop: 261075478.528   [s; MET]
               UTC: 2009-04-10T16:57:52.856200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 334.979821390126   Dec: 15.4711522547987  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.82
     Image Trigger?:     NO
     Rate S/N Ratio:     12.2065556157337  [ if not an image trigger ]
     Image S/N Ratio:    7.82

  Flight Position:   [ source = BAT ]
    RA: 334.979821390126   Dec: 15.4711522547987  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 334.956002005402   Dec: 15.4190686293622  [deg; J2000]  
        { 22h 19m 49.4s , +15d 25' 08.6" }
         +/- 1.75450630161149 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.618297597483648 [arcmin] (formal 1-sigma fit error)
    SNR: 13.6246583073405
 
  Angular difference between Flight and Ground position is 3.415169 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 165.376000016928 +/- 7.23553230973082
        Measured from: -35.7959999144077
                   to: 129.58000010252     [s; relative to TRIGTIME]
     T50: 99.1319999992847 +/- 2.20805796355031
        Measured from: 7.73200008273125
                   to: 106.864000082016     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.90399998426437     
                   to: 9.90399998426437     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -49.2240000069141     
                   to: 139.444000005722     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.902775   2.914567   2.827523   0.689558
           0.069828   0.070921   0.064217   0.054201 [error]
 Peak      0.037737   0.074319   0.111854   0.047262
           0.005469   0.006148   0.006485   0.005122 [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 5.24e-07 1.17e-06 2.05e-06 8.43e-06 5.61e-06 1.22e-05   erg/cm2
              Error 3.08e-08 3.97e-08 6.37e-08 6.25e-07 1.63e-07 6.51e-07   erg/cm2
Peak flux Power-law 3.08e-01 5.15e-01 6.54e-01 1.66e+00 1.94e+00 3.14e+00   ph/cm2/s
              Error 5.11e-02 5.21e-02 4.74e-02 2.69e-01 1.41e-01 2.79e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.92e-07 1.18e-06 2.10e-06 6.26e-06 5.54e-06 9.70e-06   erg/cm2
              Error 4.11e-08 4.20e-08 7.61e-08 1.62e-06 1.77e-07 1.65e-06   erg/cm2
Peak flux Cutoff-PL 2.53e-01 5.17e-01 7.03e-01 1.02e+00 1.90e+00 2.49e+00   ph/cm2/s
              Error 7.05e-02 5.62e-02 6.75e-02 4.92e-01 1.46e-01 5.14e-01   ph/cm2/s
 
Fluence        Band 5.19e-07 1.18e-06 2.10e-06 6.22e-06 5.53e-06 1.21e-05   erg/cm2
              Error 4.18e-08 7.61e-08 1.98e-06 1.77e-07 6.48e-07 0.00e+00   erg/cm2
Peak flux      Band 2.53e-01 5.17e-01 7.02e-01 1.02e+00 1.90e+00 2.49e+00   ph/cm2/s
              Error 7.06e-02 5.62e-02 6.76e-02 4.98e-01 1.46e-01 5.19e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.187    0.051    -      -           2.92e-03 8.01e-05   54.324 57
CPL   0.922    0.214     236.1  592.8      3.80e-03 7.74e-04   50.582 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.655    0.129    -      -           1.67e-02 1.28e-03   70.248 57
CPL   0.080    0.485     212.5 1652.3      2.82e-02 1.66e-02   67.265  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: 160.896000 sec.
T50 in the 50-300 keV band: 88.256000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  188.668  -49.224  139.444
T90   165.376  -35.796  129.580
T50    99.132    7.732  106.864
Peak    1.000    8.904    9.904

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  334.9560 +15.4191 0.0141    4.4  -57.1       8.6646    13.6  TRIG_00348929       
------------------------------------------
 
Foreground time interval of the image:
-49.224 139.444 (delta_t = 188.668 [sec])
Background time interval of the image:
-56.203 -49.224 (delta_t =   6.979 [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  -49.224 sec. to  139.444 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18651     ( -5.158269E-02   5.136049E-02) )
Norm@50keV  : 2.917470E-03    ( -8.013006E-05   8.004438E-05) )
------------------------------------------------------------
 Chi-Squared =      54.32409     using    59 PHA bins.
 Reduced chi-squared =     0.9530541     for     57 degrees of freedom
 Null hypothesis probability = 0.576
 
Photon flux (15-150 keV)    in 188.7 sec: 0.341816 ( -0.010021  0.010042 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.60669e-06 ( -1.62584e-07  1.63207e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -49.224 sec. to  139.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.921801     ( -0.194106   0.234280 )
Epeak [keV] : 236.144      ( -74.7212 1110.78 )
Norm@50keV  : 3.799340E-03    ( -7.626195E-04   7.849238E-04) )
------------------------------------------------------------
 Chi-Squared =      50.58199     using    59 PHA bins.
 Reduced chi-squared =     0.9032497     for     56 degrees of freedom
 Null hypothesis probability = 0.679
 
Photon flux (15-150 keV)    in 188.7 sec: 0.336448 ( -0.010902  0.010996 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.53544e-06 ( -1.78944e-07  1.7451e-07 ) ergs/cm2
 
Band function
Time interval is from  -49.224 sec. to  139.444 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.882236   ( -0.262912   0.468359 )
beta        : -1.40322    ( -8.59678   0.207109 )
Epeak [keV] : 205.687      ( -101.321 4369.71 )
Norm@50keV   : 3.982041E-03    ( -7.832488E-04   4.242255E-03) )
------------------------------------------------------------
 Chi-Squared =      50.41602     using    59 PHA bins.
 Reduced chi-squared =     0.9166549     for     55 degrees of freedom
 Null hypothesis probability = 0.650
 
Photon flux (15-150 keV)    in 188.7 sec: 0.335872 ( -0.011074  0.011223 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.52953e-06 ( -1.76869e-07  1.76416e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    8.904 sec. to    9.904 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.654628     ( -0.130723   0.126765 )
Norm@50keV  : 1.669321E-02    ( -1.286882E-03   1.273680E-03) )
------------------------------------------------------------
 Chi-Squared =      70.24815     using    59 PHA bins.
 Reduced chi-squared =      1.232424     for     57 degrees of freedom
 Null hypothesis probability = 0.112
 
Photon flux (15-150 keV)    in 1.000 sec: 1.93735 ( -0.14068  0.14087 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.08115e-07 ( -1.5987e-08  1.5882e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    8.904 sec. to    9.904 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 8.030684E-02     ( -0.682432   0.287414 )
Epeak [keV] : 212.464      ( -80.7653 3223.88 )
Norm@50keV  : 2.821622E-02    ( -1.069950E-02   2.254901E-02) )
------------------------------------------------------------
 Chi-Squared =      67.26466     using    59 PHA bins.
 but latest trial  0.635299     gives Chi-Squared =   2.90665
 Reduced chi-squared =      1.201155     for     56 degrees of freedom
 Null hypothesis probability = 0.144
 
Photon flux (15-150 keV)    in 1.000 sec: 1.90006 ( -0.14623  0.14573 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04939e-07 ( -1.6587e-08  1.6614e-08 ) ergs/cm2
 
Band function
Time interval is from    8.904 sec. to    9.904 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.779689   ( -9.22031   5.77969 )
beta        : -0.654644    ( -0.126720   0.130798 )
Epeak [keV] : 19.1827      ( -19.0827 9980.82 )
Norm@50keV   : 2.281742E-02    ( -7.340923E-03   3314.00 )
------------------------------------------------------------
 Chi-Squared =      70.24816     using    59 PHA bins.
 Reduced chi-squared =      1.277239     for     55 degrees of freedom
 Null hypothesis probability = 8.075E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 1.90022 ( -0.14635  0.14564 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04895e-07 ( -1.6637e-08  1.6535e-08 ) ergs/cm2
 
Plot creation:
Fri Apr 10 21:22:38 EDT 2009