batgrbproduct analysis for trigger=851855

batgrbproduct Analysis for Trigger=851855

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Aug  6 20:03:22 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger851855/GCN5_download_cron
======================================================================

  Trigger: 00851855      Segment: 000

  BAT Trigger Time: 555166977.856   [s; MET]
      Trigger Stop: 555166978.112   [s; MET]
               UTC: 2018-08-05T13:02:36.477100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 25.8134664618429   Dec: -17.5033792589829  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.44
     Image Trigger?:     NO
     Rate S/N Ratio:     27.9821371592664  [ if not an image trigger ]
     Image S/N Ratio:    10.44

  Flight Position:   [ source = BAT ]
    RA: 25.8134664618429   Dec: -17.5033792589829  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 25.8774171808023   Dec: -17.4748061029982  [deg; J2000]  
        { 01h 43m 30.6s , -17d 28' 29.3" }
         +/- 3.09656900070101 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.65094436834717 [arcmin] (formal 1-sigma fit error)
    SNR: 6.05145974726132
 
  Angular difference between Flight and Ground position is 4.041328 arcmin
 
  Partial Coding Fraction: 0.671875    [ including projection effects ]

  Duration
     T90: 122.511999964714 +/- 18.2728064531038
        Measured from: 0.108000159263611
                   to: 122.620000123978     [s; relative to TRIGTIME]
     T50: 68.3960000276566 +/- 30.0895291608301
        Measured from: 28.9520001411438
                   to: 97.3480001688004     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.107999920845032     
                   to: 0.892000079154968     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0999999046325684     
                   to: 127.464000105858     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.321439   0.414372   0.426321   0.296569
           0.070775   0.073884   0.065648   0.059880 [error]
 Peak      0.033395   0.057203   0.094262   0.029373
           0.007916   0.009191   0.008764   0.007442 [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 8.32e-08 1.92e-07 3.53e-07 1.55e-06 9.59e-07 2.17e-06   erg/cm2
              Error 2.69e-08 3.67e-08 6.41e-08 6.65e-07 1.65e-07 6.96e-07   erg/cm2
Peak flux Power-law 3.05e-01 4.70e-01 5.44e-01 1.21e+00 1.68e+00 2.53e+00   ph/cm2/s
              Error 8.24e-02 7.89e-02 6.75e-02 3.19e-01 2.13e-01 3.49e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.35e-08 1.93e-07 3.53e-07 1.52e-06 9.58e-07 2.15e-06   erg/cm2
              Error 2.12e-08 2.83e-08 6.38e-08 5.50e-07 1.67e-07 8.53e-07   erg/cm2
Peak flux Cutoff-PL 1.85e-01 4.72e-01 6.40e-01 4.44e-01 1.58e+00 1.74e+00   ph/cm2/s
              Error 1.05e-01 9.69e-02 9.71e-02 3.16e-01 2.28e-01 3.95e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 1.85e-01 4.72e-01 6.40e-01 4.45e-01 1.58e+00 1.74e+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    1.126    0.290    -      -           7.25e-04 1.14e-04   54.180 57
CPL   1.121    1.469    10000.0    0.0      7.28e-04 -3.07e-04   54.180 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.790    0.209    -      -           1.46e-02 1.89e-03   57.790 57
CPL  -0.725    1.341     112.0   75.6      5.87e-02 9.70e-02   51.730 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: 123.392000 sec.
T50 in the 50-300 keV band: 84.480000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  127.564   -0.100  127.464
T90   122.512    0.108  122.620
T50    68.396   28.952   97.348
Peak    1.000   -0.108    0.892

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   25.8774 -17.4748 0.0318   28.8  -42.2       0.3236     6.1  TRIG_00851855       
------------------------------------------
 
Foreground time interval of the image:
 -0.100  14.145 (delta_t =  14.245 [sec])
Background time interval of the image:
-239.856  -0.100 (delta_t = 239.756 [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   -0.100 sec. to  127.464 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12573     ( -0.29799   0.282779 )
Norm@50keV  : 7.24643E-04    ( -0.000114608   0.000114307 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.18 using 59 PHA bins.
# Reduced chi-squared =         0.9505 for     57 degrees of freedom 
# Null hypothesis probability =   5.816222e-01
 
Photon flux (15-150 keV)    in 127.6 sec: 8.42757E-02 ( -0.0138159  0.0138913 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.58943e-07 ( -1.6411e-07  1.65766e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.100 sec. to  127.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.12109     ( -0.946873   1.9909 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 7.28425E-04    ( -0.000114384   -0.000728446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.18 using 59 PHA bins.
# Reduced chi-squared =         0.9676 for     56 degrees of freedom 
# Null hypothesis probability =   5.439432e-01
 
Photon flux (15-150 keV)    in 127.6 sec: 8.44014E-02 ( -0.0139957  0.0136339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.58294e-07 ( -1.68172e-07  1.65035e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.100 sec. to  127.464 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.75481   ( -4.75481   -4.75481 )
beta        : -1.20033    ( -0.365977   0.327162 )
Epeak [keV] : 26.6211      ( -26.6211 11.0495 )
Norm@50keV   : 25.8579    ( -4.04456   214748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.55 using 59 PHA bins.
# Reduced chi-squared =         0.9736 for     55 degrees of freedom 
# Null hypothesis probability =   5.302338e-01
 
Photon flux (15-150 keV)    in 127.6 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]    : 20.0223  (-4.19218  6.03744)
R^2/D10^2   : 3.82439E-03  (-0.00217136   0.00448734)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.38 using 59 PHA bins.
# Reduced chi-squared =          1.130 for     57 degrees of freedom 
# Null hypothesis probability =   2.340540e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.770e-08   1.393e-08
25- 50  1.879e-07   5.599e-08
50-150  5.585e-07   1.889e-07
15-150  7.842e-07   2.031e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-50.2392      -200)
Norm        : 0.350637       (-0.0567076     0.0567076)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.59 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     57 degrees of freedom 
# Null hypothesis probability =   3.477700e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.115e-07   6.338e-08
25- 50  2.144e-07   1.208e-07
50-150  4.703e-07   2.655e-07
15-150  7.962e-07   4.420e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.23720        (-4.17103      6.35375)
R1^2/D10^2  : 4.52679E-02        (-0.0303045      0.290865)
kT2 [keV]   : 40.3852        (-23.546      -46.6315)
R2^2/D10^2  : 3.62204E-04    (-0.000223477   0.00193362)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.30 using 59 PHA bins.
# Reduced chi-squared =         0.9872 for     55 degrees of freedom 
# Null hypothesis probability =   5.014043e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.202e-08   4.988e-08
25- 50  1.992e-07   1.101e-07
50-150  6.775e-07   3.845e-07
15-150  9.587e-07   5.099e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.108 sec. to    0.892 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.789962     ( -0.214694   0.20324 )
Norm@50keV  : 1.45822E-02    ( -0.00190243   0.00187823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.79 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     57 degrees of freedom 
# Null hypothesis probability =   4.457397e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.67661 ( -0.212055  0.212948 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.71129e-07 ( -2.18372e-08  2.19307e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.108 sec. to    0.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.724775     ( -1.57718   1.10418 )
Epeak [keV] : 112.042      ( -26.7004 124.588 )
Norm@50keV  : 5.87074E-02    ( -0.0367659   0.157312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.73 using 59 PHA bins.
# Reduced chi-squared =         0.9237 for     56 degrees of freedom 
# Null hypothesis probability =   6.372030e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.57837 ( -0.2283  0.22682 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.62756e-07 ( -2.3831e-08  2.3559e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.108 sec. to    0.892 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.721998   ( -1.09183   1.11752 )
beta        : -9.37167    ( 9.37167   19.3717 )
Epeak [keV] : 112.155      ( -18.5666 91.5159 )
Norm@50keV   : 5.85501E-02    ( -0.0361072   0.524243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.73 using 59 PHA bins.
# Reduced chi-squared =         0.9405 for     55 degrees of freedom 
# Null hypothesis probability =   6.004311e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.57857 (    ) 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]    : 25.0657  (-3.42084  4.39614)
R^2/D10^2   : 4.37572E-02  (-0.0169243   0.0251205)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.12 using 59 PHA bins.
# Reduced chi-squared =         0.9144 for     57 degrees of freedom 
# Null hypothesis probability =   6.582201e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.769e-09   1.289e-09
25- 50  2.709e-08   5.425e-09
50-150  1.262e-07   2.605e-08
15-150  1.580e-07   2.645e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-21.4696      -200)
Norm        : 6.60764       (-0.888537     0.888537)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          93.02 using 59 PHA bins.
# Reduced chi-squared =          1.632 for     57 degrees of freedom 
# Null hypothesis probability =   1.828440e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.646e-08   9.370e-09
25- 50  3.166e-08   1.772e-08
50-150  6.943e-08   3.874e-08
15-150  1.175e-07   6.525e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.35275        (-3.40543      -3.40543)
R1^2/D10^2  : 8.22366        (-8.44401      376.179)
kT2 [keV]   : 26.1208        (-3.84109      -26.097)
R2^2/D10^2  : 3.80016E-02    (-0.03811   0.0242543)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.52 using 59 PHA bins.
# Reduced chi-squared =         0.9185 for     55 degrees of freedom 
# Null hypothesis probability =   6.464181e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.368e-09   3.127e-09
25- 50  2.613e-08   6.765e-09
50-150  1.281e-07   3.165e-08
15-150  1.616e-07   3.635e-08
Plot creation:
Mon Aug  6 20:07:14 EDT 2018