batgrbproduct Analysis for Trigger=373172

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Mon Oct 19 17:15:30 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger373172/GCN5_download_cron
======================================================================

  Trigger: 00373172      Segment: 000

  BAT Trigger Time: 277591704.768   [s; MET]
      Trigger Stop: 277591705.024   [s; MET]
               UTC: 2009-10-18T20:48:19.585200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 32.2106435093656   Dec: -57.526501145527  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.47
     Image Trigger?:     NO
     Rate S/N Ratio:     29.7153159162073  [ if not an image trigger ]
     Image S/N Ratio:    11.47

  Flight Position:   [ source = BAT ]
    RA: 32.2106435093656   Dec: -57.526501145527  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 32.1912358849224   Dec: -57.5458317884792  [deg; J2000]  
        { 02h 08m 45.9s , -57d 32' 45.0" }
         +/- 0.606397302059854 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.196467029089251 [arcmin] (formal 1-sigma fit error)
    SNR: 62.1534371885533
 
  Angular difference between Flight and Ground position is 1.317537 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 4.35999995470047 +/- 0.601065703889731
        Measured from: 0.240000128746033
                   to: 4.6000000834465     [s; relative to TRIGTIME]
     T50: 1.55999994277954 +/- 0.0751531959722141
        Measured from: 0.996000111103058
                   to: 2.5560000538826     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.800000011920929     
                   to: 1.80000001192093     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.26800000667572     
                   to: 7.74799996614456     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.290942   1.219699   0.481361   0.073603
           0.022128   0.022432   0.018422   0.016648 [error]
 Peak      0.441759   0.485931   0.203511   0.028158
           0.010891   0.011362   0.008539   0.006129 [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 4.30e-07 4.86e-07 3.94e-07 5.32e-07 1.50e-06 1.84e-06   erg/cm2
              Error 2.15e-08 1.40e-08 1.89e-08 5.39e-08 4.38e-08 7.04e-08   erg/cm2
Peak flux Power-law 5.01e+00 3.36e+00 1.47e+00 8.89e-01 1.03e+01 1.07e+01   ph/cm2/s
              Error 2.75e-01 1.14e-01 7.32e-02 8.72e-02 3.75e-01 3.71e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.95e-07 5.05e-07 3.85e-07 2.37e-07 1.42e-06 1.52e-06   erg/cm2
              Error 2.68e-08 1.70e-08 2.11e-08 9.07e-08 5.79e-08 1.13e-07   erg/cm2
Peak flux Cutoff-PL 4.35e+00 3.61e+00 1.48e+00 3.45e-01 9.70e+00 9.79e+00   ph/cm2/s
              Error 3.33e-01 1.41e-01 8.33e-02 1.04e-01 4.10e-01 4.31e-01   ph/cm2/s
 
Fluence        Band 3.67e-07 5.13e-07 3.73e-07 4.15e-07 1.42e-06 1.68e-06   erg/cm2
              Error 2.81e-08 1.93e-08 1.99e-08 5.00e-08 5.05e-08 9.70e-08   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    2.304    0.062    -      -           1.96e-02 6.60e-04   52.330 57
CPL   1.765    0.242      19.2    0.0      3.83e-02 0.00e+00   40.070 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.191    0.064    -      -           6.24e-02 2.36e-03   86.870 57
CPL   1.296    0.306      35.2    5.0      1.90e-01 7.43e-02   56.120 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: 3.840000 sec.
T50 in the 50-300 keV band: 1.280000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    8.016   -0.268    7.748
T90     4.360    0.240    4.600
T50     1.560    0.996    2.556
Peak    1.000    0.800    1.800

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   32.1912 -57.5458 0.0031   15.9  107.0       3.1804    62.2  TRIG_00373172       
------------------------------------------
 
Foreground time interval of the image:
 -0.268   7.748 (delta_t =   8.016 [sec])
Background time interval of the image:
-194.667  -0.268 (delta_t = 194.399 [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   -0.268 sec. to    7.748 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.30354     ( -0.0616036   0.0622771 )
Norm@50keV  : 1.96299E-02    ( -0.000661343   0.000657716 )
------------------------------------------------------------
# Chi-Squared =          52.33 using 59 PHA bins.
# Reduced chi-squared =         0.9182 for     57 degrees of freedom 
# Null hypothesis probability =   6.504464e-01
 
Photon flux (15-150 keV)    in 8.016 sec: 3.43727 ( -0.112773  0.113476 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50468e-06 ( -4.38118e-08  4.38719e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.268 sec. to    7.748 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76470     ( -0.291144   0.193777 )
Epeak [keV] : 19.1867      (   )
Norm@50keV  : 3.83108E-02    (     )
------------------------------------------------------------
# Chi-Squared =          40.07 using 59 PHA bins.
# Reduced chi-squared =         0.7156 for     56 degrees of freedom 
# Null hypothesis probability =   9.465684e-01
 
Photon flux (15-150 keV)    in 8.016 sec: 3.28319 ( -0.13285  0.13377 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42328e-06 ( -5.76431e-08  5.8132e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.268 sec. to    7.748 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.78455   ( -0.17658   0.305182 )
beta        : -10.00000    ( 1.67886e+11   1.67886e+11 )
Epeak [keV] : 18.1856      ( -17.2666 10.4475 )
Norm@50keV   : 3.74240E-02    ( -0.00969952   0.0173407 )
------------------------------------------------------------
# Chi-Squared =          40.09 using 59 PHA bins.
# Reduced chi-squared =         0.7289 for     55 degrees of freedom 
# Null hypothesis probability =   9.345126e-01
 
Photon flux (15-150 keV)    in 8.016 sec: 3.22303 ( 3.77697  -0.14384 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42176e-06 ( -1.4217e-06  -5.18395e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.800 sec. to    1.800 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.19099     ( -0.0631194   0.0639419 )
Norm@50keV  : 6.23649E-02    ( -0.00236312   0.00235084 )
------------------------------------------------------------
# Chi-Squared =          86.87 using 59 PHA bins.
# Reduced chi-squared =          1.524 for     57 degrees of freedom 
# Null hypothesis probability =   6.581552e-03
 
Photon flux (15-150 keV)    in 1 sec: 10.2761 ( -0.374042  0.375344 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.85629e-07 ( -2.01796e-08  2.0213e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.800 sec. to    1.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29599     ( -0.317354   0.295169 )
Epeak [keV] : 35.1551      ( -5.9348 4.10483 )
Norm@50keV  : 0.189554    ( -0.0574571   0.091117 )
------------------------------------------------------------
# Chi-Squared =          56.12 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     56 degrees of freedom 
# Null hypothesis probability =   4.703415e-01
 
Photon flux (15-150 keV)    in 1 sec: 9.70339 ( -0.40865  0.41051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45004e-07 ( -2.3286e-08  2.3479e-08 ) ergs/cm2
 
Band function
Time interval is from    0.800 sec. to    1.800 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.476865   ( -0.932182   2.63008 )
beta        : -2.57249    ( 2.57039   0.193948 )
Epeak [keV] : 33.2598      ( -4.5627 4.37249 )
Norm@50keV   : 0.651837    ( -0.486816   56.1084 )
------------------------------------------------------------
# Chi-Squared =          53.48 using 59 PHA bins.
# Reduced chi-squared =         0.9724 for     55 degrees of freedom 
# Null hypothesis probability =   5.328095e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Mon Oct 19 17:51:39 EDT 2009