Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Sep 11 22:28:01 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger709357
======================================================================

  Trigger: 00709357      Segment: 000

  BAT Trigger Time: 493511370.048   [s; MET]
      Trigger Stop: 493511370.112   [s; MET]
               UTC: 2016-08-21T22:29:13.303140    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 279.987123430967   Dec: 62.3929503514047  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.14
     Image Trigger?:     NO
     Rate S/N Ratio:     34.6121365997536  [ if not an image trigger ]
     Image S/N Ratio:    10.14

  Analysis Position:   [ source = BAT ]
    RA: 279.987123430967   Dec: 62.3929503514047  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 280.003615634199   Dec: 62.3870453499745  [deg; J2000]  
        { 18h 40m 00.9s , +62d 23' 13.4" }
         +/- 1.43500177883794 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.775317490763796 [arcmin] (formal 1-sigma fit error)
    SNR: 18.1569737841855
 
  Angular difference between the analysis and refined position is 0.579519 arcmin
 
  Partial Coding Fraction: 0.859375    [ including projection effects ]

  Duration
     T90: 0.479999959468842 +/- 0.0729931709021742
        Measured from: 0.00800001621246338
                   to: 0.487999975681305     [s; relative to TRIGTIME]
     T50: 0.275999963283539 +/- 0.0505964885533881
        Measured from: 0.0440000295639038
                   to: 0.319999992847443     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.229999959468842     
                   to: 0.770000040531158     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.53600001335144     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.065919   0.095350   0.043541  -0.000857
           0.006122   0.006903   0.005459   0.003964 [error]
 Peak      0.060462   0.091726   0.046839   0.007431
           0.007574   0.008266   0.006753   0.005074 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.536    0.000    0.536
T90     0.480    0.008    0.488
T50     0.276    0.044    0.320
Peak    1.000   -0.230    0.770
 
 
====== 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: N/A)
 
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      -1.879    -0.152      0.146       -           -               -         2.34e-02     -2.45e-03          2.41e-03      75.300   57
CPL     -0.120    -0.809      0.958       46.318      -5.383         7.479      2.27e-01     -2.27e-01          5.47e-01      59.050   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      -1.780     -0.183     0.176       -           -               -         1.29e-02     -1.58e-03          1.56e-03      67.000   57
CPL     -0.162     -0.926     1.138       50.977      -7.438        13.604      9.91e-02     -9.91e-02          3.08e-01      56.970   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   2.29e-08  3.34e-08  3.63e-08  7.38e-08  1.15e-07  1.66e-07   erg/cm2
      90%_error_low -2.81e-09 -2.97e-09 -4.99e-09 -1.81e-08 -1.19e-08 -2.41e-08   erg/cm2
      90%_error_hi   2.87e-09  2.97e-09  5.03e-09  2.14e-08  1.20e-08  2.66e-08   erg/cm2
Peak flux       PL   6.96e-01  5.94e-01  3.46e-01  3.01e-01  1.77e+00  1.94e+00   ph/cm2/s
      90%_error_low -1.08e-01 -6.42e-02 -5.37e-02 -8.10e-02 -1.91e-01 -2.11e-01   ph/cm2/s
      90%_error_hi   1.12e-01  6.42e-02  5.38e-02  9.65e-02  1.91e-01  2.11e-01   ph/cm2/s
 
Fluence        CPL   1.91e-08  4.08e-08  3.54e-08  9.24e-09  1.03e-07  1.05e-07   erg/cm2
      90%_error_low -3.40e-09 -4.40e-09 -6.39e-09 -5.47e-09 -1.16e-08 -1.27e-08   erg/cm2
      90%_error_hi   3.39e-09  4.52e-09  6.22e-09  1.18e-08  1.23e-08  1.59e-08   erg/cm2
Peak flux      CPL   5.65e-01  7.03e-01  3.62e-01  6.44e-02  1.68e+00  1.69e+00   ph/cm2/s
      90%_error_low -1.33e-01 -8.85e-02 -6.66e-02 -3.94e-02 -1.97e-01 -2.02e-01   ph/cm2/s
      90%_error_hi   1.34e-01  9.13e-02  6.55e-02  8.25e-02  1.97e-01  2.07e-01   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
  280.0036    62.3870   0.0105    22.5632    28.8066         0.2138426     18.157 TRIG_00709357                 
 
Foreground time interval of the image:
  0.000   0.536 (delta_t =   0.536 [sec])
Background time interval of the image:
-239.048   0.000 (delta_t = 239.048 [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    0.000 sec. to    0.536 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.87936     ( -0.152004   0.146024 )
Norm@50keV  : 2.33673E-02    ( -0.00244687   0.00241401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.30 using 59 PHA bins.
# Reduced chi-squared =          1.321 for     57 degrees of freedom 
# Null hypothesis probability =   5.263330e-02
 
Photon flux (15-150 keV)    in 0.536 sec: 3.32465 ( -0.29741  0.2975 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15158e-07 ( -1.18997e-08  1.20384e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.000 sec. to    0.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.120241     ( -0.809352   0.958008 )
Epeak [keV] : 46.3175      ( -5.38246 7.47887 )
Norm@50keV  : 0.226702    ( -0.226769   0.546801 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.05 using 59 PHA bins.
# Reduced chi-squared =          1.054 for     56 degrees of freedom 
# Null hypothesis probability =   3.647848e-01
 
Photon flux (15-150 keV)    in 0.536 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02961e-07 ( -1.15553e-08  1.23189e-08 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.230 sec. to    0.770 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.77986     ( -0.182947   0.175744 )
Norm@50keV  : 1.29257E-02    ( -0.00158055   0.00155826 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.00 using 59 PHA bins.
# Reduced chi-squared =          1.175 for     57 degrees of freedom 
# Null hypothesis probability =   1.714841e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.76749 ( -0.19107  0.19116 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1911e-07 ( -1.47966e-08  1.49996e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.230 sec. to    0.770 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.162224     ( -0.92606   1.13787 )
Epeak [keV] : 50.9773      ( -7.43787 13.6043 )
Norm@50keV  : 9.91236E-02    ( -0.0991538   0.308181 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.97 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     56 degrees of freedom 
# Null hypothesis probability =   4.388883e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.68375 ( -0.1967  0.19689 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06987e-07 ( -1.4681e-08  1.57456e-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 = 3.640871868642091E-01, IMY = -2.002134305618259E-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:
-239.048000 0.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5026  35.3658    1.2  17.9  130.9   2.4336   9.5    2.6	Her X-1                       
183.5470  60.0519    3.3  33.5  -69.0   1.4736   3.5 ------	UNKNOWN                       
 83.4684  68.9505    2.9  58.8  -26.0   6.2907   4.0 ------	UNKNOWN                       
188.2681  36.1237    3.1  41.4 -107.1   4.3236   3.8 ------	UNKNOWN                       
131.3224  67.7338    3.5  50.6  -44.7   4.7991   3.3 ------	UNKNOWN

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

    Time interval of the image:
0.000000 0.536000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4910  35.3152   12.0  18.0  131.0  -0.0121  -1.0    2.3	Her X-1                       
280.0036  62.3870    0.6  22.6   28.8   0.2139  18.2 ------	UNKNOWN                       
226.8019   3.4568    2.2  49.8 -176.1   0.1391   5.3 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
54.652600 723.052000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4684  35.3586    0.9  31.4 -177.1   4.1882  12.6    1.1	Her X-1                       
299.6024  35.1898    0.6  29.9  107.0  10.7933  20.1    0.9	Cyg X-1                       
308.0372  41.0191    3.3  27.1   89.3   1.6157   3.6    5.2	Cyg X-3                       
326.0460  38.1499    9.3  36.9   69.7   0.9626   1.2   11.9	Cyg X-2                       
323.9125  49.7196    2.7  26.9   58.0   1.7388   4.3 ------	UNKNOWN                       
 11.8191  50.3406    2.5  47.7   20.0   3.5185   4.5 ------	UNKNOWN                       
  7.9284  58.9267    2.3  39.9   14.1   2.4270   5.0 ------	UNKNOWN                       
238.5063  18.9485    3.2  52.0 -166.9   3.2435   3.5 ------	UNKNOWN                       
 62.7588  54.5537    2.8  59.5  -15.5   9.8578   4.1 ------	UNKNOWN