batgrbproduct Analysis for Trigger=686818

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri May 20 03:07:30 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger686818/GCN5_download_cron
======================================================================

  Trigger: 00686818      Segment: 000

  BAT Trigger Time: 485309869.824   [s; MET]
      Trigger Stop: 485309870.336   [s; MET]
               UTC: 2016-05-19T00:17:33.535660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 71.1133226475316   Dec: 31.1966191090885  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.39
     Image Trigger?:     NO
     Rate S/N Ratio:     8.36660026534076  [ if not an image trigger ]
     Image S/N Ratio:    7.39

  Flight Position:   [ source = BAT ]
    RA: 71.1133226475316   Dec: 31.1966191090885  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 71.1215205223674   Dec: 31.2461291991568  [deg; J2000]  
        { 04h 44m 29.2s , +31d 14' 46.1" }
         +/- 2.21469758966124 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.969097782659795 [arcmin] (formal 1-sigma fit error)
    SNR: 9.76814386220191
 
  Angular difference between Flight and Ground position is 3.000238 arcmin
 
  Partial Coding Fraction: 0.1972656    [ including projection effects ]

  Duration
     T90: 35.5680000185966 +/- 6.11085331802475
        Measured from: -0.495999872684479
                   to: 35.0720001459122     [s; relative to TRIGTIME]
     T50: 24.5760000348091 +/- 7.50118495081009
        Measured from: 0.960000097751617
                   to: 25.5360001325607     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.156000018119812     
                   to: 0.843999981880188     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.991999983787537     
                   to: 41.1200000047684     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.599188   0.840102   0.422552   0.081580
           0.093599   0.096608   0.081757   0.069291 [error]
 Peak      0.074791   0.110873   0.078021   0.044071
           0.016446   0.018155   0.015163   0.012088 [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 2.50e-07 3.50e-07 3.63e-07 6.90e-07 1.18e-06 1.65e-06   erg/cm2
              Error 4.98e-08 4.79e-08 8.09e-08 3.07e-07 1.89e-07 3.93e-07   erg/cm2
Peak flux Power-law 8.51e-01 8.07e-01 5.32e-01 5.45e-01 2.41e+00 2.74e+00   ph/cm2/s
              Error 2.59e-01 1.55e-01 1.24e-01 2.57e-01 4.50e-01 4.97e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.42e-07 3.67e-07 3.62e-07 3.72e-07 1.15e-06 1.34e-06   erg/cm2
              Error 5.57e-08 6.45e-08 8.79e-08 5.03e-07 2.11e-07 5.33e-07   erg/cm2
Peak flux Cutoff-PL 8.51e-01 8.08e-01 5.32e-01 5.41e-01 2.41e+00 2.73e+00   ph/cm2/s
              Error 2.70e-01 1.47e-01 1.30e-01 4.27e-01 4.48e-01 5.05e-01   ph/cm2/s
 
Fluence        Band 2.39e-07 3.68e-07 3.56e-07 4.94e-07 1.14e-06 1.47e-06   erg/cm2
              Error -------- -------- -------- -------- -------- --------   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    1.949    0.251    -      -           3.05e-03 5.00e-04   37.240 57
CPL   1.587    0.913      49.8    0.0      4.88e-03 0.00e+00   36.870 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.601    0.313    -      -           1.88e-02 3.52e-03   46.900 57
CPL   1.606    0.315    9999.4    0.0      1.88e-02 2.87e-02   46.900 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: 1.920000 sec.
T50 in the 50-300 keV band: 0.704000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   42.112   -0.992   41.120
T90    35.568   -0.496   35.072
T50    24.576    0.960   25.536
Peak    1.000   -0.156    0.844

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   71.1215 +31.2461 0.0197   41.5  -55.3       1.9558     9.8  TRIG_00686818       
------------------------------------------
 
Foreground time interval of the image:
 -0.992  41.120 (delta_t =  42.112 [sec])
Background time interval of the image:
-239.824  -0.992 (delta_t = 238.832 [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   -0.992 sec. to   41.120 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.94862     ( -0.243417   0.259325 )
Norm@50keV  : 3.04914E-03    ( -0.00050746   0.000492601 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.24 using 59 PHA bins.
# Reduced chi-squared =         0.6533 for     57 degrees of freedom 
# Null hypothesis probability =   9.802005e-01
 
Photon flux (15-150 keV)    in 42.11 sec: 0.446897 ( -0.0616444  0.0616896 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.18158e-06 ( -1.86843e-07  1.90171e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.992 sec. to   41.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58673     ( -1.23753   0.588276 )
Epeak [keV] : 49.8100      (   )
Norm@50keV  : 4.88199E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.87 using 59 PHA bins.
# Reduced chi-squared =         0.6584 for     56 degrees of freedom 
# Null hypothesis probability =   9.774031e-01
 
Photon flux (15-150 keV)    in 42.11 sec: 0.441493 ( -0.06367  0.063413 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14535e-06 ( -2.10171e-07  2.12588e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.992 sec. to   41.120 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48963   ( 1.48959   6.26451 )
beta        : -2.30501    ( 2.25179   0.520933 )
Epeak [keV] : 47.8394      ( -47.4273 -47.4273 )
Norm@50keV   : 5.54721E-03    ( -0.00289241   403.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.69 using 59 PHA bins.
# Reduced chi-squared =         0.6671 for     55 degrees of freedom 
# Null hypothesis probability =   9.727719e-01
 
Photon flux (15-150 keV)    in 42.11 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14431e-06 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.7330  (-1.67218  1.94842)
R^2/D10^2   : 0.159902  (-0.0753034   0.144878)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.58 using 59 PHA bins.
# Reduced chi-squared =         0.8523 for     57 degrees of freedom 
# Null hypothesis probability =   7.787270e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.612e-07   3.716e-08
25- 50  4.415e-07   8.982e-08
50-150  2.818e-07   9.369e-08
15-150  8.845e-07   1.779e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 74.9437       (-26.1107      53.1562)
Norm        : 2.14550       (-0.427377     0.536753)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.04 using 59 PHA bins.
# Reduced chi-squared =         0.6498 for     57 degrees of freedom 
# Null hypothesis probability =   9.813743e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.333e-07   4.834e-08
25- 50  3.779e-07   5.767e-08
50-150  5.100e-07   2.420e-07
15-150  1.121e-06   2.583e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.71840        (-2.05638      3.95362)
R1^2/D10^2  : 2.28819        (-1.92799      31.3889)
kT2 [keV]   : 16.1123        (-4.27319      33.402)
R2^2/D10^2  : 2.66479E-02    (-0.0259726   0.0707568)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.73 using 59 PHA bins.
# Reduced chi-squared =         0.6861 for     55 degrees of freedom 
# Null hypothesis probability =   9.635671e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.449e-07   1.330e-07
25- 50  3.589e-07   1.851e-07
50-150  4.663e-07   2.809e-07
15-150  1.070e-06   5.457e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.156 sec. to    0.844 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60096     ( -0.309398   0.317323 )
Norm@50keV  : 1.87736E-02    ( -0.00354529   0.00349665 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.90 using 59 PHA bins.
# Reduced chi-squared =         0.8228 for     57 degrees of freedom 
# Null hypothesis probability =   8.276771e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.41322 ( -0.449018  0.450079 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.75554e-07 ( -3.49708e-08  3.52889e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.156 sec. to    0.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60595     ( -0.315787   0.31487 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.87662E-02    ( -0.00353562   0.0538125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.90 using 59 PHA bins.
# Reduced chi-squared =         0.8375 for     56 degrees of freedom 
# Null hypothesis probability =   8.015792e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.41291 ( -0.44886  0.44761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.75461e-07 ( -1.7959e-08  3.5245e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.156 sec. to    0.844 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.39727   ( 1.00166   1.00166 )
beta        : -1.69612    ( 1.64551   0.344496 )
Epeak [keV] : 29.4770      ( -38.4045 271.032 )
Norm@50keV   : 2.90101    ( -2.77403   1156.51 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.58 using 59 PHA bins.
# Reduced chi-squared =         0.8468 for     55 degrees of freedom 
# Null hypothesis probability =   7.834540e-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]    : 13.1172  (-2.83404  3.9835)
R^2/D10^2   : 0.431405  (-0.267608   0.612048)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.50 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     57 degrees of freedom 
# Null hypothesis probability =   4.566742e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.574e-08   5.614e-09
25- 50  5.474e-08   1.959e-08
50-150  5.986e-08   2.411e-08
15-150  1.303e-07   3.800e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 189.384       (-105.543      -189.001)
Norm        : 9.81965       (-1.80427     2.37665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.27 using 59 PHA bins.
# Reduced chi-squared =         0.8293 for     57 degrees of freedom 
# Null hypothesis probability =   8.173578e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.461e-08   1.397e-08
25- 50  4.706e-08   2.602e-08
50-150  1.014e-07   5.625e-08
15-150  1.731e-07   9.580e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.97363        (-3.06672      3.59104)
R1^2/D10^2  : 2.01109        (-1.42932      9.19827)
kT2 [keV]   : 40.2174        (-35.3424      -40.253)
R2^2/D10^2  : 6.93944E-03    (-0.00673632   0.066978)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.36 using 59 PHA bins.
# Reduced chi-squared =         0.8429 for     55 degrees of freedom 
# Null hypothesis probability =   7.901751e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.451e-08   1.443e-08
25- 50  4.999e-08   2.785e-08
50-150  1.053e-07   5.845e-08
15-150  1.798e-07   9.255e-08
Plot creation:
Fri May 20 03:12:34 EDT 2016