Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Sep 11 20:56:56 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger709351
======================================================================

  Trigger: 00709351      Segment: 000

  BAT Trigger Time: 493504486.912   [s; MET]
      Trigger Stop: 493504487.936   [s; MET]
               UTC: 2016-08-21T20:34:30.167540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 171.247515998307   Dec: 42.3431631317135  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.57
     Image Trigger?:     NO
     Rate S/N Ratio:     22.494443758404  [ if not an image trigger ]
     Image S/N Ratio:    12.57

  Analysis Position:   [ source = BAT ]
    RA: 171.247515998307   Dec: 42.3431631317135  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 171.254144096868   Dec: 42.3452880838354  [deg; J2000]  
        { 11h 25m 01.0s , +42d 20' 43.0" }
         +/- 0.763377668995017 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.193565916273637 [arcmin] (formal 1-sigma fit error)
    SNR: 44.7335587297715
 
  Angular difference between the analysis and refined position is 0.320395 arcmin
 
  Partial Coding Fraction: 0.796875    [ including projection effects ]

  Duration
     T90: 112.635999917984 +/- 1.09670048549611
        Measured from: 1.56000000238419
                   to: 114.195999920368     [s; relative to TRIGTIME]
     T50: 67.8719999790192 +/- 2.05627237871138
        Measured from: 20.1439999938011
                   to: 88.0159999728203     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 113.508000016212     
                   to: 114.508000016212     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.61199998855591     
                   to: 115.167999982834     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.282184   4.418580   3.200570   0.766115
           0.096533   0.104477   0.092977   0.077318 [error]
 Peak      0.176919   0.238000   0.169798   0.086453
           0.030264   0.036905   0.033388   0.025298 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  117.780   -2.612  115.168
T90   112.636    1.560  114.196
T50    67.872   20.144   88.016
Peak    1.000  113.508  114.508
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.534    -0.058      0.058       -           -               -         6.48e-03     -1.93e-04          1.93e-04      58.890   57
CPL     -1.467    -0.103      0.202      390.041    -390.041      -390.041      6.97e-03     -6.52e-04          1.56e-03      59.100   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.679     -0.290     0.269       -           -               -         3.96e-02     -7.33e-03          7.14e-03      52.140   57
CPL     -1.002     -0.895     1.360       72.335     -49.306       -72.335      8.94e-02     -5.54e-02          3.60e-01      51.030   56
 
 
=== 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         PL   1.01e-06  1.81e-06  2.50e-06  7.19e-06  7.21e-06  1.25e-05   erg/cm2
      90%_error_low -5.84e-08 -6.06e-08 -9.66e-08 -6.17e-07 -2.30e-07 -6.75e-07   erg/cm2
      90%_error_hi   5.98e-08  6.04e-08  9.63e-08  6.57e-07  2.31e-07  7.06e-07   erg/cm2
Peak flux       PL   1.94e+00  1.75e+00  1.10e+00  1.04e+00  5.23e+00  5.83e+00   ph/cm2/s
      90%_error_low -4.66e-01 -2.91e-01 -2.58e-01 -4.12e-01 -8.61e-01 -9.77e-01   ph/cm2/s
      90%_error_hi   4.93e-01  2.90e-01  2.54e-01  5.29e-01  8.61e-01  9.84e-01   ph/cm2/s
 
Fluence        CPL   1.00e-06  1.81e-06  2.51e-06  6.88e-06  7.19e-06  1.22e-05   erg/cm2
      90%_error_low -7.55e-08 -6.32e-08 -9.63e-08 -1.91e-06 -2.62e-07 -1.92e-06   erg/cm2
      90%_error_hi   3.73e-08  6.64e-08  1.04e-07  4.47e-07  2.43e-07  5.17e-07   erg/cm2
Peak flux      CPL   1.75e+00  1.90e+00  1.17e+00  5.29e-01  5.15e+00  5.34e+00   ph/cm2/s
      90%_error_low -5.59e-01 -3.66e-01 -2.92e-01 -5.29e-01 -8.72e-01 -9.80e-01   ph/cm2/s
      90%_error_hi   5.75e-01  3.86e-01  3.05e-01  6.22e-01  8.71e-01  1.18e+00   ph/cm2/s
 
======================================================================
  • Special notes of this burst




    Image

    Pre-slew 15.0-350.0 keV image (Event data)

    #   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  171.2541    42.3453   0.0043    18.7447   -67.5396         6.8534679     44.734 TRIG_00709351                 
 
Foreground time interval of the image:
 -2.612  74.989 (delta_t =  77.601 [sec])
Background time interval of the image:
-239.912  -2.612 (delta_t = 237.300 [sec])




    Light Curves

    Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

    Full-time range; 1 s binning

    Bokeh Plot

    Other quick-look light curves:




    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from   -2.612 sec. to  115.168 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.53383     ( -0.0579703   0.0578275 )
Norm@50keV  : 6.48071E-03    ( -0.000193418   0.000193271 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.89 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     57 degrees of freedom 
# Null hypothesis probability =   4.061254e-01
 
Photon flux (15-150 keV)    in 117.8 sec: 0.816654 ( -0.026312  0.026424 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.20502e-06 ( -2.3049e-07  2.31076e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -2.612 sec. to  115.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.46722     ( -0.0665434   0.238466 )
Epeak [keV] : 390.041      ( -884.359 -884.359 )
Norm@50keV  : 6.96687E-03    ( -0.000374988   0.00183485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.10 using 59 PHA bins.
# Reduced chi-squared =          1.055 for     56 degrees of freedom 
# Null hypothesis probability =   3.631586e-01
 
Photon flux (15-150 keV)    in 117.8 sec: 0.814887 ( -0.029376  0.0278 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.18845e-06 ( -2.62246e-07  2.43371e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from  113.508 sec. to  114.508 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67899     ( -0.290269   0.268758 )
Norm@50keV  : 3.96314E-02    ( -0.00732982   0.00713904 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.14 using 59 PHA bins.
# Reduced chi-squared =         0.9147 for     57 degrees of freedom 
# Null hypothesis probability =   6.577546e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.22567 ( -0.86059  0.86084 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.67646e-07 ( -7.06162e-08  7.16022e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  113.508 sec. to  114.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.00218     ( -0.894989   1.36009 )
Epeak [keV] : 72.3346      ( -49.3057 -72.3346 )
Norm@50keV  : 8.94367E-02    ( -0.0553805   0.360084 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.9113 for     56 degrees of freedom 
# Null hypothesis probability =   6.630223e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.14811 ( -0.87166  0.87075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.56656e-07 ( -7.31515e-08  7.42078e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

    S(15-50 keV) vs. S(50-150 keV) plot 

    S(15-50 keV)  = N/A
S(50-150 keV) = N/A

    The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.




    Mask shadow pattern 

    IMX = 1.296474261791370E-01, IMY = 3.136091556933593E-01

    Spacecraft aspect plot

    Bright source in the pre-burst/pre-slew/post-slew images

    Pre-burst image of 15-350 keV band 

    Time interval of the image:
-239.912000 -2.612000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4058  35.3969   22.9  44.2  127.5  -0.4819  -0.5    4.1	Her X-1                       
233.0728   3.4107    2.4  56.9  174.1   6.9297   4.7 ------	UNKNOWN                       
160.6546  66.9385    3.1  23.5    6.1   0.8105   3.7 ------	UNKNOWN                       
173.8327  43.0382    2.7  16.8  -69.3   1.0281   4.3 ------	UNKNOWN                       
163.3978  34.0891    2.3  28.8  -73.0   1.5803   4.9 ------	UNKNOWN

    Pre-slew background subtracted image of 15-350 keV band 

    Time interval of the image:
-2.612000 74.988620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3897  35.2092    8.5  44.3  127.7  -0.8013  -1.4    8.7	Her X-1                       
 98.2767  55.8838    3.5  53.3   -3.5   1.2532   3.3 ------	UNKNOWN                       
171.2542  42.3453    0.3  18.7  -67.5   6.8535  44.7 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
131.388600 962.145800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4450  35.2712    5.4  18.0  134.4   1.6887   2.1    4.3	Her X-1                       
272.2636  22.6584    2.9  36.4  116.5   6.4977   3.9 ------	UNKNOWN                       
280.6526  61.5918    3.9  22.7   34.3   2.2430   3.2 ------	UNKNOWN                       
305.7919  69.1785    2.5  33.7   20.3   3.8311   4.6 ------	UNKNOWN                       
280.0850  61.9741    4.7  22.5   33.2   2.2076   3.2 ------	UNKNOWN                       
236.1138  -5.2916    3.6  56.9  174.0  16.6500   3.2 ------	UNKNOWN