batgrbproduct Analysis for Trigger=531003

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Aug 15 18:53:37 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger531003/GCN5_download_cron
======================================================================

  Trigger: 00531003      Segment: 000

  BAT Trigger Time: 366689648.32   [s; MET]
      Trigger Stop: 366689649.344   [s; MET]
               UTC: 2012-08-15T02:13:58.781640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 273.955183891862   Dec: -52.1341064210625  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.23
     Image Trigger?:     NO
     Rate S/N Ratio:     16.0312195418814  [ if not an image trigger ]
     Image S/N Ratio:    9.23

  Flight Position:   [ source = BAT ]
    RA: 273.955183891862   Dec: -52.1341064210625  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 273.976500005112   Dec: -52.1247117408774  [deg; J2000]  
        { 18h 15m 54.4s , -52d 07' 29.0" }
         +/- 1.78575405939845 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.713247011545927 [arcmin] (formal 1-sigma fit error)
    SNR: 13.2853552326614
 
  Angular difference between Flight and Ground position is 0.966524 arcmin
 
  Partial Coding Fraction: 0.2851562    [ including projection effects ]

  Duration
     T90: 9.70799994468689 +/- 2.51212497252856
        Measured from: -0.00399988889694214
                   to: 9.70400005578995     [s; relative to TRIGTIME]
     T50: 4.28799992799759 +/- 1.60667608925218
        Measured from: 0.80400013923645
                   to: 5.09200006723404     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.171999990940094     
                   to: 1.17199999094009     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.244000017642975     
                   to: 11.9679999947548     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.364487   0.376613   0.130256   0.037202
           0.036728   0.037697   0.031749   0.026978 [error]
 Peak      0.088065   0.085882   0.053559   0.013334
           0.011788   0.012015   0.009946   0.008621 [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 1.40e-07 1.59e-07 1.30e-07 1.78e-07 4.94e-07 6.08e-07   erg/cm2
              Error 2.12e-08 1.95e-08 2.91e-08 7.53e-08 6.90e-08 1.14e-07   erg/cm2
Peak flux Power-law 9.57e-01 7.44e-01 3.88e-01 2.92e-01 2.22e+00 2.38e+00   ph/cm2/s
              Error 2.01e-01 1.07e-01 8.26e-02 1.18e-01 3.23e-01 3.42e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.31e-07 1.83e-07 1.10e-07 2.44e-08 4.49e-07 0.00e+00   erg/cm2
              Error 2.32e-08 2.82e-08 4.09e-08 9.71e-08 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 8.98e-01 8.13e-01 3.87e-01 1.17e-01 2.18e+00 2.22e+00   ph/cm2/s
              Error 2.21e-01 1.48e-01 9.75e-02 1.88e-01 3.28e-01 2.74e-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    2.291    0.225    -      -           4.24e-03 7.01e-04   49.030 57
CPL   1.033    1.259      28.6    0.0      2.55e-02 0.00e+00   44.770 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.940    0.247    -      -           1.52e-02 2.52e-03   62.280 57
CPL   1.222    1.091      45.7    0.0      3.96e-02 0.00e+00   60.840 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.212   -0.244   11.968
T90     9.708   -0.004    9.704
T50     4.288    0.804    5.092
Peak    1.000    0.172    1.172

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  273.9765 -52.1247 0.0145   43.8   19.7       0.9571    13.3  TRIG_00531003       
------------------------------------------
 
Foreground time interval of the image:
 -0.244  11.968 (delta_t =  12.212 [sec])
Background time interval of the image:
-239.320  -0.244 (delta_t = 239.076 [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   -0.244 sec. to   11.968 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.29054     ( -0.216266   0.233794 )
Norm@50keV  : 4.24395E-03    ( -0.000707322   0.000693694 )
------------------------------------------------------------
# Chi-Squared =          49.03 using 59 PHA bins.
# Reduced chi-squared =         0.8602 for     57 degrees of freedom 
# Null hypothesis probability =   7.645813e-01
 
Photon flux (15-150 keV)    in 12.21 sec: 0.737785 ( -0.0863676  0.0863849 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.94332e-07 ( -6.81579e-08  6.97789e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.244 sec. to   11.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.03294     ( -1.44715   1.06989 )
Epeak [keV] : 28.6308      (   )
Norm@50keV  : 2.54808E-02    (     )
------------------------------------------------------------
# Chi-Squared =          44.77 using 59 PHA bins.
# Reduced chi-squared =         0.7994 for     56 degrees of freedom 
# Null hypothesis probability =   8.594906e-01
 
Photon flux (15-150 keV)    in 12.21 sec: 0.714853 ( -0.087811  0.088199 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.48929e-07 ( -7.42209e-08  1.19918e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.244 sec. to   11.968 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.82646   ( -14.5474   -4.65396 )
beta        : -2.68950    ( -0.731755   0.381895 )
Epeak [keV] : 24.9978      ( -5.04924 10.6099 )
Norm@50keV   : 22.4356    ( -21.8138   436.949 )
------------------------------------------------------------
# Chi-Squared =          43.23 using 59 PHA bins.
# Reduced chi-squared =         0.7861 for     55 degrees of freedom 
# Null hypothesis probability =   8.746659e-01
 
Photon flux (15-150 keV)    in 12.21 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.11555  (-1.0311  1.16554)
R^2/D10^2   : 0.775706  (-0.324493   0.570203)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          52.26 using 59 PHA bins.
# Reduced chi-squared =         0.9168 for     57 degrees of freedom 
# Null hypothesis probability =   6.532480e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.140e-07   2.187e-08
25- 50  2.045e-07   3.523e-08
50-150  5.628e-08   2.050e-08
15-150  3.748e-07   5.733e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 41.0498       (-10.2538      15.4547)
Norm        : 4.74085       (-0.960115     1.25468)
------------------------------------------------------------
# Chi-Squared =          44.90 using 59 PHA bins.
# Reduced chi-squared =         0.7877 for     57 degrees of freedom 
# Null hypothesis probability =   8.772545e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.341e-07   1.886e-08
25- 50  1.783e-07   2.650e-08
50-150  1.419e-07   5.161e-08
15-150  4.543e-07   7.595e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.72842        (-1.92367      1.86875)
R1^2/D10^2  : 2.31616        (-1.38834      4.74998)
kT2 [keV]   : 15.7971        (-5.9351      26.2034)
R2^2/D10^2  : 2.79795E-02    (-0.0260546   0.220509)
------------------------------------------------------------
# Chi-Squared =          43.56 using 59 PHA bins.
# Reduced chi-squared =         0.7921 for     55 degrees of freedom 
# Null hypothesis probability =   8.669037e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.327e-07   7.216e-08
25- 50  1.771e-07   9.304e-08
50-150  1.355e-07   8.333e-08
15-150  4.453e-07   2.346e-07

Peak spectrum fit

Power-law model
Time interval is from    0.172 sec. to    1.172 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.94024     ( -0.2408   0.253576 )
Norm@50keV  : 1.52180E-02    ( -0.00255319   0.00249511 )
------------------------------------------------------------
# Chi-Squared =          62.28 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     57 degrees of freedom 
# Null hypothesis probability =   2.938235e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.22220 ( -0.32305  0.323397 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40008e-07 ( -2.25599e-08  2.29024e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.172 sec. to    1.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22174     ( -1.2986   0.884337 )
Epeak [keV] : 45.6872      (   )
Norm@50keV  : 3.96269E-02    (     )
------------------------------------------------------------
# Chi-Squared =          60.84 using 59 PHA bins.
# Reduced chi-squared =          1.086 for     56 degrees of freedom 
# Null hypothesis probability =   3.059883e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.18192 ( -0.3284  0.32849 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.31664e-07 ( -2.4315e-08  2.4405e-08 ) ergs/cm2
 
Band function
Time interval is from    0.172 sec. to    1.172 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99828   ( -1122.61   -1107.63 )
beta        : -2.25004    ( -0.438989   0.344098 )
Epeak [keV] : 25.1647      ( -4.46788 4.08046 )
Norm@50keV   : 2435.82    ( -1577.74   6361.13 )
------------------------------------------------------------
# Chi-Squared =          55.95 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     55 degrees of freedom 
# Null hypothesis probability =   4.390836e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.2025  (-1.74539  2.04419)
R^2/D10^2   : 0.979886  (-0.495044   1.03926)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          70.35 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     57 degrees of freedom 
# Null hypothesis probability =   1.101355e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.091e-08   5.380e-09
25- 50  5.347e-08   1.140e-08
50-150  2.956e-08   1.073e-08
15-150  1.039e-07   2.194e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 72.4706       (-25.0208      50.2015)
Norm        : 10.9101       (-2.26378     2.84972)
------------------------------------------------------------
# Chi-Squared =          60.80 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     57 degrees of freedom 
# Null hypothesis probability =   3.408688e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.809e-08   5.610e-09
25- 50  4.510e-08   8.050e-09
50-150  5.942e-08   2.705e-08
15-150  1.326e-07   2.828e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.13843        (-1.74463      2.48899)
R1^2/D10^2  : 5.00684        (-3.4122      11.5698)
kT2 [keV]   : 20.7207        (-7.16984      41.7973)
R2^2/D10^2  : 4.26894E-02    (-0.0414624   0.0862213)
------------------------------------------------------------
# Chi-Squared =          58.66 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     55 degrees of freedom 
# Null hypothesis probability =   3.426636e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.937e-08   1.665e-08
25- 50  4.487e-08   2.323e-08
50-150  5.946e-08   3.601e-08
15-150  1.337e-07   6.698e-08
Plot creation:
Wed Aug 15 19:09:19 EDT 2012