batgrbproduct Analysis for Trigger=591237

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Mar 11 09:38:38 EDT 2014
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger591237/GCN5_download_cron
======================================================================

  Trigger: 00591237      Segment: 000

  BAT Trigger Time: 416178312   [s; MET]
      Trigger Stop: 416178704   [s; MET]
               UTC: 2014-03-10T21:05:00.256460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 283.264887129568   Dec: -8.70709199265057  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    24.29
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    24.29

  Flight Position:   [ source = BAT ]
    RA: 283.264887129568   Dec: -8.70709199265057  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 283.27776433122   Dec: -8.70944617237586  [deg; J2000]  
        { 18h 53m 06.7s , -08d 42' 34.0" }
         +/- 1.49821363283127 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.587467131587983 [arcmin] (formal 1-sigma fit error)
    SNR: 17.0725638212939
 
  Angular difference between Flight and Ground position is 0.776678 arcmin
 
  Partial Coding Fraction: 0.8515625    [ including projection effects ]

  Duration
     T90: 603.31199991703 +/- 31.6416748688052
        Measured from: -46.9639998674393
                   to: 556.348000049591     [s; relative to TRIGTIME]
     T50: 281.987999916077 +/- 16.0990997548215
        Measured from: 108.660000145435
                   to: 390.648000061512     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 334.364000022411     
                   to: 335.364000022411     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -131.060000002384     
                   to: 638.259999990463     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    18.001430   2.028070   0.072932   0.269339
           0.182220   0.161813   0.135171   0.122606 [error]
 Peak      0.045263   0.009541   0.009495   0.010438
           0.006955   0.006077   0.005073   0.004614 [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 6.41e-06 9.07e-07 5.76e-08 3.88e-09 7.38e-06 7.38e-06   erg/cm2
              Error 5.09e-07 9.01e-08 1.50e-08 1.75e-09 5.02e-07 5.02e-07   erg/cm2
Peak flux Power-law 4.30e-01 1.32e-01 2.25e-02 4.40e-03 5.88e-01 5.90e-01   ph/cm2/s
              Error 1.21e-01 6.61e-02 2.90e-02 1.14e-02 1.59e-01 1.61e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.13e-06 6.97e-07 1.00e-09 6.64e-16 6.83e-06 6.83e-06   erg/cm2
              Error 5.89e-07 1.12e-07 2.68e-09 2.20e-13 5.99e-07 5.99e-07   erg/cm2
Peak flux Cutoff-PL 4.34e-01 1.27e-01 2.03e-02 3.72e-03 5.81e-01 5.83e-01   ph/cm2/s
              Error 1.18e-01 9.94e-02 2.87e-02 8.42e-03 1.58e-01 1.59e-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    5.976    0.248    -      -           7.95e-05 1.67e-05   80.830 57
CPL   1.000    0.000      50.0    0.0      1.08e-03 0.00e+00  678.330 56
 
The chi2 of BB fit is 60.62 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.559    1.019    -      -           1.39e-03 1.23e-03   55.230 57
CPL  -1.315    0.000      13.5   12.4      1.90e+01 0.00e+00   55.850 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  769.320 -131.060  638.260
T90   603.312  -46.964  556.348
T50   281.988  108.660  390.648
Peak    1.000  334.364  335.364

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  283.2778  -8.7094 0.0112   29.2 -168.6      15.1049    17.1  TRIG_00591237       
------------------------------------------
 
Foreground time interval of the image:
-131.060 421.001 (delta_t = 552.061 [sec])
Background time interval of the image:
-188.799 -169.070 (delta_t =  19.729 [sec])
-168.000 -131.060 (delta_t =  36.940 [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
Multiple GTIs in the spectrum
tstart tstop
-131.060000 546.500000
548.000000 638.260000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.97646     ( -0.247644   0.248319 )
Norm@50keV  : 7.95454E-05    ( -1.53692e-05   1.81258e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.83 using 59 PHA bins.
# Reduced chi-squared =          1.418 for     57 degrees of freedom 
# Null hypothesis probability =   2.066303e-02
 
Photon flux (15-150 keV)    in 767.8 sec: 0.319722 ( -0.0238935  0.0241585 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.38149e-06 ( -4.9996e-07  5.04767e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-131.060000 546.500000
548.000000 638.260000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.07628E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         678.33 using 59 PHA bins.
# Reduced chi-squared =         12.113 for     56 degrees of freedom 
# Null hypothesis probability =  1.051316e-107
 
Photon flux (15-150 keV)    in 767.8 sec: 0.296096 ( -0.029044  0.028339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.82842e-06 ( -6.06347e-07  5.91283e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-131.060000 546.500000
548.000000 638.260000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.99447   ( 2.35139   8.99447 )
beta        : -6.00209    ( -0.231502   0.266394 )
Epeak [keV] : 350.918      ( -350.918 -350.918 )
Norm@50keV   : 1.05674E-02    ( -0.00197493   0.00258564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.86 using 59 PHA bins.
# Reduced chi-squared =          1.470 for     55 degrees of freedom 
# Null hypothesis probability =   1.317935e-02
 
Photon flux (15-150 keV)    in 767.8 sec: 0.143431 ( 6.85657  -0.143431 ) 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]    : 2.78432  (-0.128407  0.13985)
R^2/D10^2   : 68.1686  (-22.3462   32.5622)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.62 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     57 degrees of freedom 
# Null hypothesis probability =   3.467369e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.063e-06   7.309e-07
25- 50  6.759e-07   8.953e-08
50-150  5.800e-10   2.686e-10
15-150  6.739e-06   7.098e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.89250       (-0.329895      0.373489)
Norm        : 76.5015       (-21.3235     29.2269)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.90 using 59 PHA bins.
# Reduced chi-squared =          1.086 for     57 degrees of freedom 
# Null hypothesis probability =   3.055666e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.278e-06   6.185e-07
25- 50  7.551e-07   9.064e-08
50-150  3.504e-09   1.460e-09
15-150  7.037e-06   6.407e-07
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.77527        (-0.165094      0.184803)
R1^2/D10^2  : 69.8096        (      )
kT2 [keV]   : 200.000        (-200      -200)
R2^2/D10^2  : 1.91321E-06    (-1.56909e-06   1.2953e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.56 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.60 using 59 PHA bins.
# Reduced chi-squared =          1.065 for     55 degrees of freedom 
# Reduced chi-squared =          1.029 for     55 degrees of freedom 
# Null hypothesis probability =   3.461692e-01
# Null hypothesis probability =   4.152233e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.076e-06   5.908e-07
25- 50  6.748e-07   8.258e-08
50-150  1.186e-07   2.809e-10
15-150  6.869e-06   6.465e-07

Peak spectrum fit

Power-law model
Time interval is from  334.364 sec. to  335.364 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.55949     ( -0.885172   1.15335 )
Norm@50keV  : 1.38547E-03    ( -0.000965712   0.00149359 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.23 using 59 PHA bins.
# Reduced chi-squared =         0.9689 for     57 degrees of freedom 
# Null hypothesis probability =   5.418534e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.588186 ( -0.159141  0.159408 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.26197e-08 ( -7.6806e-09  9.25192e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  334.364 sec. to  335.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.31469     (     )
Epeak [keV] : 13.5002      ( -10.6878 14.1709 )
Norm@50keV  : 19.0180    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.85 using 59 PHA bins.
# Reduced chi-squared =         0.9973 for     56 degrees of freedom 
# Null hypothesis probability =   4.806543e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.581162 ( -0.153911  0.163064 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.26245e-08 ( -9.3527e-09  9.0377e-09 ) ergs/cm2
 
Band function
Time interval is from  334.364 sec. to  335.364 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.08236   ( 1.68761   1.68761 )
beta        : -3.93926    ( 3.73853   1.0432 )
Epeak [keV] : 14.5573      ( -3.33031 102.898 )
Norm@50keV   : 7021.64    ( -7027.53   1.07999e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.84 using 59 PHA bins.
# Reduced chi-squared =         0.9971 for     55 degrees of freedom 
# Null hypothesis probability =   4.807294e-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]    : 3.59319  (-0.821367  1.08137)
R^2/D10^2   : 26.8591  (-26.8591   94.4982)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.83 using 59 PHA bins.
# Reduced chi-squared =         0.9796 for     57 degrees of freedom 
# Null hypothesis probability =   5.188574e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.417e-08   8.350e-09
25- 50  3.726e-09   2.478e-09
50-150  2.285e-11   2.642e-11
15-150  1.792e-08   1.026e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 8.98680       (-3.46782      8.09279)
Norm        : 24.5512       (-24.5509     57.8118)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.97 using 59 PHA bins.
# Reduced chi-squared =         0.9820 for     57 degrees of freedom 
# Null hypothesis probability =   5.136440e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.354e-08   7.935e-09
25- 50  5.020e-09   3.367e-09
50-150  2.541e-10   2.701e-10
15-150  1.881e-08   1.119e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.47281        (-0.831997      0.958876)
R1^2/D10^2  : 31.6716        (-23.7836      126.015)
kT2 [keV]   : 75.0166        (-61.9032      -76.0643)
R2^2/D10^2  : 2.90095E-04    (-0.00026332   0.0250484)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.40 using 59 PHA bins.
# Reduced chi-squared =         0.9164 for     55 degrees of freedom 
# Null hypothesis probability =   6.506712e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.403e-08   8.210e-09
25- 50  4.285e-09   2.455e-09
50-150  1.676e-08   1.194e-08
15-150  3.508e-08   1.719e-08
Plot creation:
Tue Mar 11 10:06:25 EDT 2014