batgrbproduct Analysis for Trigger=731535

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jan 11 06:21:37 EST 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger731535/GCN5_download_cron
======================================================================

  Trigger: 00731535      Segment: 000

  BAT Trigger Time: 505728152   [s; MET]
      Trigger Stop: 505728216   [s; MET]
               UTC: 2017-01-10T08:02:13.561480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 259.888854995834   Dec: -25.0149956632395  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    11.95
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.95

  Flight Position:   [ source = BAT ]
    RA: 259.888854995834   Dec: -25.0149956632395  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 259.886711656993   Dec: -25.0173150995354  [deg; J2000]  
        { 17h 19m 32.8s , -25d 01' 02.3" }
         +/- 1.05740419406263 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.497044775921286 [arcmin] (formal 1-sigma fit error)
    SNR: 28.0858996026255
 
  Angular difference between Flight and Ground position is 0.181516 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 569.335999965668 +/- 26.3903285291889
        Measured from: -27.41999989748
                   to: 541.916000068188     [s; relative to TRIGTIME]
     T50: 302.171999931335 +/- 22.5188629132412
        Measured from: 114.64400011301
                   to: 416.816000044346     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 303.096000015736     
                   to: 304.096000015736     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -54.255999982357     
                   to: 580.167999982834     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     5.213786   6.465245   3.929254   0.459295
           0.195247   0.177650   0.145608   0.119589 [error]
 Peak      0.017294   0.022183   0.011986   0.020188
           0.007798   0.006993   0.005874   0.004699 [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 1.70e-06 2.62e-06 3.03e-06 6.74e-06 9.34e-06 1.41e-05   erg/cm2
              Error 1.07e-07 9.69e-08 1.48e-07 7.16e-07 3.49e-07 8.22e-07   erg/cm2
Peak flux Power-law 1.74e-01 1.54e-01 9.39e-02 8.64e-02 4.59e-01 5.09e-01   ph/cm2/s
              Error 1.04e-01 5.76e-02 4.87e-02 1.11e-01 1.69e-01 1.85e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.57e-06 2.72e-06 3.08e-06 3.53e-06 8.98e-06 1.09e-05   erg/cm2
              Error 1.31e-07 1.14e-07 1.58e-07 1.30e-06 4.07e-07 1.36e-06   erg/cm2
Peak flux Cutoff-PL 1.79e-01 1.55e-01 9.17e-02 8.13e-02 4.61e-01 5.09e-01   ph/cm2/s
              Error 1.04e-01 6.73e-02 7.14e-02 1.09e-01 1.69e-01 1.83e-01   ph/cm2/s
 
Fluence        Band 1.50e-06 2.77e-06 2.97e-06 5.64e-06 9.04e-06 1.29e-05   erg/cm2
              Error 1.52e-07 -------- 1.57e-07 -------- 3.89e-07 --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.790    0.067    -      -           1.61e-03 5.87e-05   53.100 57
CPL   1.334    0.278      71.7   22.6      2.73e-03 8.85e-04   44.410 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.717    0.737    -      -           3.44e-03 1.38e-03   72.350 57
CPL   1.738    2.045    9999.4   -0.0      3.40e-03 0.00e+00   72.350 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  634.424  -54.256  580.168
T90   569.336  -27.420  541.916
T50   302.172  114.644  416.816
Peak    1.000  303.096  304.096

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  259.8867 -25.0173 0.0068   18.9  -91.8      14.1266    28.1  TRIG_00731535       
------------------------------------------
 
Foreground time interval of the image:
-18.499 -16.220 (delta_t =   2.279 [sec])
-15.000 508.701 (delta_t = 523.701 [sec])
Background time interval of the image:

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
-54.256000 -22.680000
-20.000000 -16.220000
-15.000000 580.168000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78956     ( -0.0664299   0.0668293 )
Norm@50keV  : 1.60934E-03    ( -5.87939e-05   5.86378e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.10 using 59 PHA bins.
# Reduced chi-squared =         0.9316 for     57 degrees of freedom 
# Null hypothesis probability =   6.219940e-01
 
Photon flux (15-150 keV)    in 630.5 sec: 0.220873 ( -0.00838893  0.00841665 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.34496e-06 ( -3.4837e-07  3.49364e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-54.256000 -22.680000
-20.000000 -16.220000
-15.000000 580.168000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33439     ( -0.287252   0.269275 )
Epeak [keV] : 71.6646      ( -11.5159 33.6508 )
Norm@50keV  : 2.72848E-03    ( -0.000715806   0.00105333 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.41 using 59 PHA bins.
# Reduced chi-squared =         0.7930 for     56 degrees of freedom 
# Null hypothesis probability =   8.681336e-01
 
Photon flux (15-150 keV)    in 630.5 sec: 0.213800 ( -0.009253  0.009282 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.98053e-06 ( -4.07114e-07  4.0724e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-54.256000 -22.680000
-20.000000 -16.220000
-15.000000 580.168000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.659573   ( -0.9156   4.40123 )
beta        : -1.95461    ( 1.95375   0.13198 )
Epeak [keV] : 43.8624      ( -17.48 49.3789 )
Norm@50keV   : 7.56806E-03    ( -0.00798535   19.7496 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.68 using 59 PHA bins.
# Reduced chi-squared =         0.7942 for     55 degrees of freedom 
# Null hypothesis probability =   8.640985e-01
 
Photon flux (15-150 keV)    in 630.5 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.04377e-06 ( -9.03935e-06  -3.88514e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.1083  (  )
R^2/D10^2   : 3.65119E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         198.35 using 59 PHA bins.
# Reduced chi-squared =         3.4799 for     57 degrees of freedom 
# Null hypothesis probability =   1.620450e-17
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.388e-07   5.769e-08
25- 50  2.915e-06   1.387e-07
50-150  3.182e-06   2.409e-07
15-150  6.935e-06   2.869e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 113.488       (-16.8214      17.5201)
Norm        : 0.929156       (-0.0453202     0.057718)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.48 using 59 PHA bins.
# Reduced chi-squared =         0.7803 for     57 degrees of freedom 
# Null hypothesis probability =   8.864624e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.529e-06   1.122e-07
25- 50  2.708e-06   1.277e-07
50-150  4.699e-06   1.152e-06
15-150  8.936e-06   1.220e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.84688        (-0.789425      0.839179)
R1^2/D10^2  : 0.269804        (-0.0879722      0.147792)
kT2 [keV]   : 22.9745        (-2.64772      3.63699)
R2^2/D10^2  : 3.42610E-03    (-0.00148972   0.00217997)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.20 using 59 PHA bins.
# Reduced chi-squared =         0.7854 for     55 degrees of freedom 
# Null hypothesis probability =   8.755142e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.458e-06   1.888e-07
25- 50  2.762e-06   2.541e-07
50-150  4.671e-06   6.831e-07
15-150  8.891e-06   8.764e-07

Peak spectrum fit

Power-law model
Time interval is from  303.096 sec. to  304.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71679     ( -0.724605   0.749667 )
Norm@50keV  : 3.43624E-03    ( -0.00143273   0.00133727 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.35 using 59 PHA bins.
# Reduced chi-squared =          1.269 for     57 degrees of freedom 
# Null hypothesis probability =   8.271173e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.459078 ( -0.168186  0.168949 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.17753e-08 ( -1.2903e-08  1.36326e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  303.096 sec. to  304.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73847     ( -2.30926   1.78145 )
Epeak [keV] : 9999.35      ( -9999.35 -9999.36 )
Norm@50keV  : 3.39621E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.35 using 59 PHA bins.
# Reduced chi-squared =          1.292 for     56 degrees of freedom 
# Null hypothesis probability =   6.971910e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.460572 ( -0.169989  0.167296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.18121e-08 ( -1.44944e-08  1.33014e-08 ) ergs/cm2
 
Band function
Time interval is from  303.096 sec. to  304.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.96329   ( -4.96329   -4.96329 )
beta        : -1.81425    ( -1.46606   0.783391 )
Epeak [keV] : 22.5942      ( -22.5942 63.0815 )
Norm@50keV   : 795.114    ( -284.475   5.97049e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.14 using 59 PHA bins.
# Reduced chi-squared =          1.312 for     55 degrees of freedom 
# Null hypothesis probability =   6.032473e-02
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24141e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.7858  (-3.79219  6.65545)
R^2/D10^2   : 0.161190  (-0.161073   0.675923)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.24 using 59 PHA bins.
# Reduced chi-squared =          1.303 for     57 degrees of freedom 
# Null hypothesis probability =   6.214104e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.902e-09   2.579e-09
25- 50  1.075e-08   6.890e-09
50-150  6.959e-09   5.320e-09
15-150  2.161e-08   1.440e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 105.586       (-108.698      -108.698)
Norm        : 2.01195       (-0.81641     1.69348)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.68 using 59 PHA bins.
# Reduced chi-squared =          1.275 for     57 degrees of freedom 
# Null hypothesis probability =   7.877162e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.258e-09   3.326e-09
25- 50  9.189e-09   5.700e-09
50-150  1.535e-08   1.199e-08
15-150  2.979e-08   2.016e-08
Double BB
R1^2/D10^2  : 6.62383E-05        (-5.11291e-05      0.000474958)
kT2 [keV]   : 8.56696        (-3.34132      4.81456)
R2^2/D10^2  : 0.338260    (-0.240838   2.07486)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.27 using 59 PHA bins.
#Fit statistic : Chi-Squared =          70.92 using 59 PHA bins.
#Fit statistic : Chi-Squared =          70.51 using 59 PHA bins.
# Reduced chi-squared =          1.332 for     55 degrees of freedom 
# Reduced chi-squared =          1.290 for     55 degrees of freedom 
# Reduced chi-squared =          1.282 for     55 degrees of freedom 
# Null hypothesis probability =   5.031306e-02
# Null hypothesis probability =   7.288718e-02
# Null hypothesis probability =   7.757032e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.312e-09   3.958e-09
25- 50  8.841e-09   4.813e-09
50-150  1.123e-08   7.830e-09
15-150  2.538e-08   1.480e-08
Plot creation:
Wed Jan 11 06:27:12 EST 2017