batgrbproduct Analysis for Trigger=375246

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Mon Nov  9 11:55:46 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger375246/GCN5_download_cron
======================================================================

  Trigger: 00375246      Segment: 000

  BAT Trigger Time: 279435468.608   [s; MET]
      Trigger Stop: 279435484.992   [s; MET]
               UTC: 2009-11-09T04:57:43.363760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 309.264961145751   Dec: -44.1765036048656  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.64
     Image Trigger?:     NO
     Rate S/N Ratio:     13.5277492584687  [ if not an image trigger ]
     Image S/N Ratio:    7.64

  Flight Position:   [ source = BAT ]
    RA: 309.264961145751   Dec: -44.1765036048656  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 309.25210489108   Dec: -44.1766709312203  [deg; J2000]  
        { 20h 37m 00.5s , -44d 10' 36.0" }
         +/- 2.09859101456236 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.0859874459328 [arcmin] (formal 1-sigma fit error)
    SNR: 10.5492481883972
 
  Angular difference between Flight and Ground position is 0.553318 arcmin
 
  Partial Coding Fraction: 0.1972656    [ including projection effects ]

  Duration
     T90: 47.6960000395775 +/- 16.7081067781536
        Measured from: 0.408000111579895
                   to: 48.1040001511574     [s; relative to TRIGTIME]
     T50: 14.9120000004768 +/- 8.89923682328839
        Measured from: 7.86400014162064
                   to: 22.7760001420975     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.2039999961853     
                   to: 9.2039999961853     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.839999973773956     
                   to: 51.4640000462532     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.559179   0.774408   0.679760   0.331307
           0.104593   0.104369   0.088444   0.075309 [error]
 Peak      0.023283   0.061413   0.045352   0.027881
           0.014506   0.014708   0.012674   0.010560 [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 1.76e-07 3.64e-07 5.86e-07 2.11e-06 1.62e-06 3.24e-06   erg/cm2
              Error 5.05e-08 6.02e-08 8.66e-08 7.56e-07 2.19e-07 7.85e-07   erg/cm2
Peak flux Power-law 3.92e-01 4.13e-01 3.08e-01 3.72e-01 1.26e+00 1.48e+00   ph/cm2/s
              Error 2.21e-01 1.44e-01 1.02e-01 2.68e-01 3.94e-01 4.27e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.76e-07 3.64e-07 5.87e-07 2.10e-06 1.62e-06 3.22e-06   erg/cm2
              Error 5.05e-08 6.03e-08 8.68e-08 7.51e-07 2.19e-07 7.80e-07   erg/cm2
Peak flux Cutoff-PL 3.91e-01 4.13e-01 3.08e-01 3.70e-01 1.25e+00 1.48e+00   ph/cm2/s
              Error 2.21e-01 1.44e-01 1.02e-01 2.66e-01 3.94e-01 4.26e-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    1.312    0.252    -      -           3.15e-03 4.15e-04   60.010 57
CPL   1.309    0.255    10000.0    0.0      3.16e-03 4.16e-04   60.030 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.422    0.533    -      -           1.03e-02 2.95e-03   59.650 57
CPL   3.237    0.000     339.8    0.0      1.01e-03 0.00e+00   59.420 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: 16.320000 sec.
T50 in the 50-300 keV band: 8.640000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   52.304   -0.840   51.464
T90    47.696    0.408   48.104
T50    14.912    7.864   22.776
Peak    1.000    8.204    9.204

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  309.2521 -44.1767 0.0182   47.4  162.8       2.2950    10.5  TRIG_00375246       
------------------------------------------
 
Foreground time interval of the image:
 -0.840  51.464 (delta_t =  52.304 [sec])
Background time interval of the image:
-239.608  -0.840 (delta_t = 238.768 [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   -0.840 sec. to   51.464 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31245     ( -0.256898   0.247612 )
Norm@50keV  : 3.14989E-03    ( -0.000416606   0.000414124 )
------------------------------------------------------------
# Chi-Squared =          60.01 using 59 PHA bins.
# Reduced chi-squared =          1.053 for     57 degrees of freedom 
# Null hypothesis probability =   3.672845e-01
 
Photon flux (15-150 keV)    in 52.3 sec: 0.376665 ( -0.0553231  0.0557482 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.62303e-06 ( -2.18445e-07  2.19243e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.840 sec. to   51.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30895     ( -0.277404   0.232212 )
Epeak [keV] : 10000.00      (   )
Norm@50keV  : 3.16289E-03    ( -0.000417395   0.000415159 )
------------------------------------------------------------
# Chi-Squared =          60.03 using 59 PHA bins.
# Reduced chi-squared =          1.072 for     56 degrees of freedom 
# Null hypothesis probability =   3.317937e-01
 
Photon flux (15-150 keV)    in 52.3 sec: 0.376481 ( -0.055305  0.055729 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.62333e-06 ( -2.18541e-07  2.19351e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.840 sec. to   51.464 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01135   ( 1.01151   1.01151 )
beta        : -1.31226    ( 1.31234   0.257226 )
Epeak [keV] : 51.2598      ( -51.0659 -51.0659 )
Norm@50keV   : 6.04218E-03    ( -0.00604662   1.53323 )
------------------------------------------------------------
# Chi-Squared =          60.01 using 59 PHA bins.
# Reduced chi-squared =          1.091 for     55 degrees of freedom 
# Null hypothesis probability =   2.991682e-01
 
Photon flux (15-150 keV)    in 52.3 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    8.200 sec. to    9.208 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42202     ( -0.544434   0.521083 )
Norm@50keV  : 1.02541E-02    ( -0.002947   0.00294546 )
------------------------------------------------------------
# Chi-Squared =          59.65 using 59 PHA bins.
# Reduced chi-squared =          1.047 for     57 degrees of freedom 
# Null hypothesis probability =   3.794036e-01
 
Photon flux (15-150 keV)    in 1.008 sec: 1.25516 ( -0.391238  0.396917 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.94361e-08 ( -2.98344e-08  3.00561e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    8.200 sec. to    9.208 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.23676     (     )
Epeak [keV] : 339.776      (   )
Norm@50keV  : 1.01063E-03    (     )
------------------------------------------------------------
# Chi-Squared =          59.42 using 59 PHA bins.
# Reduced chi-squared =          1.061 for     56 degrees of freedom 
# Null hypothesis probability =   3.521854e-01
 
Photon flux (15-150 keV)    in 1.008 sec: 1.25469 ( -0.391078  0.3968 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.94607e-08 ( -2.98468e-08  3.00704e-08 ) ergs/cm2
 
Band function
Time interval is from    8.200 sec. to    9.208 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.584981   ( 0.85244   0.85244 )
beta        : -1.50224    ( 1.49132   0.606231 )
Epeak [keV] : 60.4587      ( -59.1305 578.454 )
Norm@50keV   : 3.31187E-02    ( -0.0349036   730.282 )
------------------------------------------------------------
# Chi-Squared =          59.57 using 59 PHA bins.
# Reduced chi-squared =          1.083 for     55 degrees of freedom 
# Null hypothesis probability =   3.128912e-01
 
Photon flux (15-150 keV)    in 1.008 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Mon Nov  9 12:24:28 EST 2009