batgrbproduct analysis for trigger=873539

batgrbproduct Analysis for Trigger=873539

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Nov 27 06:00:17 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger873539/GCN5_download_cron
======================================================================

  Trigger: 00873539      Segment: 000

  BAT Trigger Time: 564918870.08   [s; MET]
      Trigger Stop: 564918870.336   [s; MET]
               UTC: 2018-11-26T09:54:08.097180    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 152.350664748836   Dec: -29.6790891415622  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.69
     Image Trigger?:     NO
     Rate S/N Ratio:     18.7349939951952  [ if not an image trigger ]
     Image S/N Ratio:    8.69

  Flight Position:   [ source = BAT ]
    RA: 152.350664748836   Dec: -29.6790891415622  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 152.349856080723   Dec: -29.6980347528505  [deg; J2000]  
        { 10h 09m 24.0s , -29d 41' 52.9" }
         +/- 1.53725830715497 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.591447460241903 [arcmin] (formal 1-sigma fit error)
    SNR: 16.4564883894336
 
  Angular difference between Flight and Ground position is 1.137518 arcmin
 
  Partial Coding Fraction: 0.6875    [ including projection effects ]

  Duration
     T90: 2.09200000762939 +/- 0.118928534389858
        Measured from: 0.0160000324249268
                   to: 2.10800004005432     [s; relative to TRIGTIME]
     T50: 1.6159999370575 +/- 1.09446788754849
        Measured from: 0.308000087738037
                   to: 1.92400002479553     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.21799993515015     
                   to: 2.21799993515015     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0680000782012939     
                   to: 2.16399991512299     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.087313   0.183884   0.161910   0.030542
           0.014498   0.016122   0.014858   0.010863 [error]
 Peak      0.073964   0.125874   0.105319   0.018015
           0.010588   0.012049   0.011198   0.007763 [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 3.17e-08 6.94e-08 1.20e-07 4.77e-07 3.27e-07 6.97e-07   erg/cm2
              Error 5.38e-09 7.48e-09 1.35e-08 1.13e-07 3.48e-08 1.23e-07   erg/cm2
Peak flux Power-law 7.88e-01 8.82e-01 7.07e-01 9.40e-01 2.72e+00 3.32e+00   ph/cm2/s
              Error 1.39e-01 9.98e-02 8.64e-02 2.29e-01 2.85e-01 3.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.44e-08 7.86e-08 1.34e-07 1.14e-07 3.06e-07 3.51e-07   erg/cm2
              Error 6.29e-09 9.49e-09 1.66e-08 7.71e-08 3.69e-08 8.22e-08   erg/cm2
Peak flux Cutoff-PL 6.91e-01 9.40e-01 7.63e-01 4.96e-01 2.68e+00 2.89e+00   ph/cm2/s
              Error 1.65e-01 1.18e-01 1.05e-01 3.23e-01 2.89e-01 4.23e-01   ph/cm2/s
 
Fluence        Band 2.11e-08 8.68e-08 1.20e-07 2.90e-07 3.11e-07 5.19e-07   erg/cm2
              Error 7.06e-09 1.13e-08 1.49e-08 1.12e-07 3.56e-08 1.20e-07   erg/cm2
Peak flux      Band 7.06e-01 9.26e-01 7.58e-01 5.73e-01 2.70e+00 2.97e+00   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    1.215    0.151    -      -           1.45e-02 1.41e-03   79.710 57
CPL  -0.133    0.747      83.8   24.2      6.45e-02 6.08e-02   66.640 56
 
The chi2 of BB fit is 73.32 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    1.320    0.164    -      -           2.27e-02 2.35e-03   53.410 57
CPL   0.651    0.681     106.7  276.9      4.82e-02 4.13e-02   50.060 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: 2.048000 sec.
T50 in the 50-300 keV band: 1.728000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    2.232   -0.068    2.164
T90     2.092    0.016    2.108
T50     1.616    0.308    1.924
Peak    1.000    1.218    2.218

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  152.3499 -29.6980 0.0117   26.9 -128.6       0.4744    16.5  TRIG_00873539       
------------------------------------------
 
Foreground time interval of the image:
 -0.068   2.164 (delta_t =   2.232 [sec])
Background time interval of the image:
-239.080 -115.770 (delta_t = 123.310 [sec])
-115.080  -0.068 (delta_t = 115.012 [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   -0.068 sec. to    2.164 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21514     ( -0.152191   0.150488 )
Norm@50keV  : 1.45144E-02    ( -0.00141258   0.00141257 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.71 using 59 PHA bins.
# Reduced chi-squared =          1.398 for     57 degrees of freedom 
# Null hypothesis probability =   2.520689e-02
 
Photon flux (15-150 keV)    in 2.232 sec: 1.70740 ( -0.169918  0.170188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.27287e-07 ( -3.46496e-08  3.48632e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.068 sec. to    2.164 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.133163     ( -0.811242   0.683503 )
Epeak [keV] : 83.8279      ( -14.883 33.6022 )
Norm@50keV  : 6.45452E-02    ( -0.033545   0.0880409 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.64 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     56 degrees of freedom 
# Null hypothesis probability =   1.562303e-01
 
Photon flux (15-150 keV)    in 2.232 sec: 1.64174 ( -0.17295  0.17335 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.06056e-07 ( -3.67164e-08  3.70155e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.068 sec. to    2.164 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.133991   ( -0.431714   1.30271 )
beta        : -10.0000    ( 10   20 )
Epeak [keV] : 83.7981      ( -14.8594 33.6145 )
Norm@50keV   : 6.46080E-02    ( -0.0336064   0.088348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.64 using 59 PHA bins.
# Reduced chi-squared =          1.212 for     55 degrees of freedom 
# Null hypothesis probability =   1.351100e-01
 
Photon flux (15-150 keV)    in 2.232 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.11063e-07 ( -3.11047e-07  -3.5779e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 17.9533  (-1.93538  2.21339)
R^2/D10^2   : 0.118188  (-0.0384125   0.0554516)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.32 using 59 PHA bins.
# Reduced chi-squared =          1.286 for     57 degrees of freedom 
# Null hypothesis probability =   7.162732e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.704e-08   3.413e-09
25- 50  7.864e-08   1.105e-08
50-150  1.839e-07   3.224e-08
15-150  2.796e-07   3.627e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-25.5924      -200)
Norm        : 7.09361       (-0.700477     0.700477)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.81 using 59 PHA bins.
# Reduced chi-squared =          1.541 for     57 degrees of freedom 
# Null hypothesis probability =   5.449163e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.942e-08   1.886e-08
25- 50  7.583e-08   4.122e-08
50-150  1.663e-07   8.091e-08
15-150  2.815e-07   1.531e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.45211        (-3.36735      4.18038)
R1^2/D10^2  : 0.451159        (-0.272718      0.914481)
kT2 [keV]   : 25.4551        (-19.3488      16.9654)
R2^2/D10^2  : 2.74992E-02    (-0.023694   0.0502293)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.99 using 59 PHA bins.
# Reduced chi-squared =          1.182 for     55 degrees of freedom 
# Null hypothesis probability =   1.677183e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.477e-08   1.383e-08
25- 50  8.024e-08   4.174e-08
50-150  2.059e-07   1.117e-07
15-150  3.109e-07   1.609e-07

Peak spectrum fit

Power-law model
Time interval is from    1.218 sec. to    2.218 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32009     ( -0.164126   0.164623 )
Norm@50keV  : 2.27412E-02    ( -0.00235323   0.00235042 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.41 using 59 PHA bins.
# Reduced chi-squared =         0.9370 for     57 degrees of freedom 
# Null hypothesis probability =   6.104999e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.72339 ( -0.284878  0.285129 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.23642e-07 ( -2.54935e-08  2.56466e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.218 sec. to    2.218 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.651380     ( -0.733656   0.628655 )
Epeak [keV] : 106.736      ( -32.301 521.508 )
Norm@50keV  : 4.82465E-02    ( -0.0240003   0.0586799 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.06 using 59 PHA bins.
# Reduced chi-squared =         0.8939 for     56 degrees of freedom 
# Null hypothesis probability =   6.980507e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.67810 ( -0.28891  0.28879 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.17389e-07 ( -2.6894e-08  2.6791e-08 ) ergs/cm2
 
Band function
Time interval is from    1.218 sec. to    2.218 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.651508   ( -0.402971   0.817459 )
beta        : -10.0000    ( 10   7.10543e-15 )
Epeak [keV] : 106.732      ( -25.1335 527.463 )
Norm@50keV   : 4.82383E-02    ( -0.0482381   0.0587158 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.06 using 59 PHA bins.
# Reduced chi-squared =         0.9102 for     55 degrees of freedom 
# Null hypothesis probability =   6.634014e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.69506 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18005e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 17.2943  (-2.21685  2.56107)
R^2/D10^2   : 0.204292  (-0.076056   0.120278)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.32 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     57 degrees of freedom 
# Null hypothesis probability =   1.864609e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.238e-08   2.419e-09
25- 50  5.554e-08   7.710e-09
50-150  1.193e-07   2.328e-08
15-150  1.872e-07   2.870e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-35.5405      -200)
Norm        : 11.2896       (-1.16769     1.16769)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.72 using 59 PHA bins.
# Reduced chi-squared =         0.9950 for     57 degrees of freedom 
# Null hypothesis probability =   4.856470e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.811e-08   7.195e-09
25- 50  5.407e-08   1.953e-08
50-150  1.186e-07   6.454e-08
15-150  2.008e-07   1.100e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.76992        (-2.46617      3.04011)
R1^2/D10^2  : 1.63238        (-1.00316      4.00147)
kT2 [keV]   : 26.9318        (-6.04721      13.5568)
R2^2/D10^2  : 3.61879E-02    (-0.0276987   0.0574797)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.73 using 59 PHA bins.
# Reduced chi-squared =         0.8860 for     55 degrees of freedom 
# Null hypothesis probability =   7.116074e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.180e-08   1.075e-08
25- 50  5.472e-08   2.494e-08
50-150  1.434e-07   7.696e-08
15-150  2.200e-07   8.985e-08
Plot creation:
Tue Nov 27 06:03:31 EST 2018