Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Thu Oct  6 15:25:31 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger711914
======================================================================

  Trigger: 00711914      Segment: 000

  BAT Trigger Time: 495389280   [s; MET]
      Trigger Stop: 495389344   [s; MET]
               UTC: 2016-09-12T16:07:43.149340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 301.518010297722   Dec: 57.543460509347  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.97
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.97

  Analysis Position:   [ source = BAT ]
    RA: 301.518010297722   Dec: 57.543460509347  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 301.605851267266   Dec: 57.5638056226087  [deg; J2000]  
        { 20h 06m 25.4s , +57d 33' 49.7" }
         +/- 2.35821115181329 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.3558636778596 [arcmin] (formal 1-sigma fit error)
    SNR: 8.9301220804323
 
  Angular difference between the analysis and refined position is 3.079894 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 207.307999968529 +/- 16.0269435733524
        Measured from: -20.4480000138283
                   to: 186.8599999547     [s; relative to TRIGTIME]
     T50: 22.4359999895096 +/- 105.830444624765
        Measured from: 145.463999986649
                   to: 167.899999976158     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 148.56400001049     
                   to: 149.56400001049     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -33.1119999885559     
                   to: 211.087999999523     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.578017   2.179341   1.768317   0.481266
           0.106124   0.113153   0.105087   0.109793 [error]
 Peak      0.052537   0.071959   0.062680   0.022365
           0.007134   0.008209   0.007661   0.007259 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  244.200  -33.112  211.088
T90   207.308  -20.448  186.860
T50    22.436  145.464  167.900
Peak    1.000  148.564  149.564
 
 
====== 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      -1.435    -0.109      0.108       -           -               -         1.56e-03     -9.37e-05          9.33e-05      36.820   57
CPL     -1.177    -0.310      0.456      158.823     -72.019      -158.823      2.10e-03     -6.10e-04          1.42e-03      35.710   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      -1.268     -0.204     0.205       -           -               -         1.36e-02     -1.57e-03          1.56e-03      53.260   57
CPL     -1.262     -0.207     0.355     9999.320    -9999.320      -9999.320      1.36e-02     -1.36e-02          8.26e-03      53.280   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   4.57e-07  8.75e-07  1.29e-06  4.12e-06  3.66e-06  6.74e-06   erg/cm2
      90%_error_low -4.68e-08 -5.38e-08 -1.04e-07 -6.80e-07 -2.48e-07 -7.63e-07   erg/cm2
      90%_error_hi   4.84e-08  5.36e-08  1.04e-07  7.72e-07  2.50e-07  8.41e-07   erg/cm2
Peak flux       PL   4.47e-01  5.16e-01  4.29e-01  6.00e-01  1.61e+00  1.99e+00   ph/cm2/s
      90%_error_low -8.87e-02 -6.39e-02 -6.28e-02 -1.66e-01 -1.82e-01 -2.46e-01   ph/cm2/s
      90%_error_hi   9.28e-02  6.29e-02  6.20e-02  2.04e-01  1.82e-01  2.54e-01   ph/cm2/s
 
Fluence        CPL   4.37e-07  8.96e-07  1.31e-06  2.72e-06  3.56e-06  5.37e-06   erg/cm2
      90%_error_low -5.68e-08 -6.34e-08 -1.08e-07 -1.26e-06 -2.89e-07 -1.29e-06   erg/cm2
      90%_error_hi   5.77e-08  6.48e-08  1.10e-07  1.59e-06  2.90e-07  1.66e-06   erg/cm2
Peak flux      CPL   4.47e-01  5.17e-01  4.29e-01  5.96e-01  1.62e+00  2.00e+00   ph/cm2/s
      90%_error_low     N/A       N/A   -6.28e-02     N/A   -2.52e-01 -3.24e-01   ph/cm2/s
      90%_error_hi      N/A       N/A    6.21e-02     N/A    2.34e-01  2.22e-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
  301.6059    57.5638   0.0216    22.3794   -24.9060         1.4323674      8.930 TRIG_00711914                 
 
Foreground time interval of the image:
-15.099  73.301 (delta_t =  88.400 [sec])
Background time interval of the image:




    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  -33.112 sec. to  211.088 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.43457     ( -0.108985   0.108447 )
Norm@50keV  : 1.55989E-03    ( -9.3659e-05   9.33196e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.82 using 59 PHA bins.
# Reduced chi-squared =         0.6459 for     57 degrees of freedom 
# Null hypothesis probability =   9.825965e-01
 
Photon flux (15-150 keV)    in 244.2 sec: 0.191513 ( -0.011302  0.011314 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.65616e-06 ( -2.47643e-07  2.50229e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -33.112 sec. to  211.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.17698     ( -0.309532   0.456159 )
Epeak [keV] : 158.823      ( -72.0188 -158.823 )
Norm@50keV  : 2.10233E-03    ( -0.000609899   0.00141775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.71 using 59 PHA bins.
# Reduced chi-squared =         0.6377 for     56 degrees of freedom 
# Null hypothesis probability =   9.841947e-01
 
Photon flux (15-150 keV)    in 244.2 sec: 0.188580 ( -0.012259  0.012221 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.56324e-06 ( -2.89494e-07  2.89726e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from  148.564 sec. to  149.564 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.26758     ( -0.203968   0.204819 )
Norm@50keV  : 1.35623E-02    ( -0.00156648   0.00155734 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9344 for     57 degrees of freedom 
# Null hypothesis probability =   6.160660e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.60876 ( -0.18182  0.1819 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35126e-07 ( -1.82084e-08  1.84842e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  148.564 sec. to  149.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.26195     ( -0.207032   0.355701 )
Epeak [keV] : 9999.32      ( -9999.36 -9999.36 )
Norm@50keV  : 1.36241E-02    ( -0.013623   0.00825932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.28 using 59 PHA bins.
# Reduced chi-squared =         0.9514 for     56 degrees of freedom 
# Null hypothesis probability =   5.784344e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.61747 ( -0.25174  0.23395 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.49593e-08 ( 0  0 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 207.308 sec.
Hardness ratio (energy fluence ratio) = 1.47985799039

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

    S(15-50 keV)  = 1.3324282e-06
S(50-150 keV) = 2.323739e-06

    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 = 3.734577096126134E-01, IMY = 1.734012259417237E-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:

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

    Time interval of the image:
-15.099400 73.300590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3165  35.4220   26.2  36.6 -104.0   0.1576   0.4    8.4	Her X-1                       
268.3344  -1.3854    4.6  46.8 -162.5  -0.8111  -2.5    4.5	SW J1753.5-0127               
273.9985 -14.1943   23.4  55.0 -177.1  -0.3734  -0.5    9.5	GX 17+2                       
288.6537  10.8431    4.9  26.3  176.9   0.4009   2.4   10.5	GRS 1915+105                  
299.6219  35.2040    0.6   0.1   81.4   2.9464  20.4    1.6	Cyg X-1                       
308.0537  41.1599    0.0   8.9   18.0  -0.0800  -0.5   12.7	Cyg X-3                       
326.1717  38.3224   15.1  21.5   46.0  -0.1291  -0.8    0.0	Cyg X-2                       
349.4214  29.1824    2.9  42.2   55.9   2.2970   4.0 ------	UNKNOWN                       
331.6195  64.4827    2.8  35.0   -4.3   0.7713   4.2 ------	UNKNOWN                       
301.6058  57.5638    1.3  22.4  -24.9   1.4319   8.9 ------	UNKNOWN                       
249.1229  41.8426    2.9  39.4  -92.5   2.3144   4.0 ------	UNKNOWN                       
249.4127  32.3497    2.5  41.3 -106.9   2.7992   4.7 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
117.900600 337.511500
361.000200 365.720000
421.000000 430.094900
482.000000 482.318100
541.000000 547.816500
601.000000 617.898700
776.000000 778.846500
780.000000 903.088400
920.000000 959.079600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4901  35.3194   21.0  38.2 -142.1  -0.2501  -0.6    2.1	Her X-1                       
288.7467  10.8958    6.0  47.7  159.9   1.6248   1.9    4.3	GRS 1915+105                  
299.6146  35.2089    0.4  22.4  146.9   7.5943  26.6    1.3	Cyg X-1                       
308.3908  40.9608    0.0  17.2  125.0  -0.5698  -1.9   12.7	Cyg X-3                       
326.3085  38.3907   16.8  25.1   91.9   0.2761   0.7    7.7	Cyg X-2                       
318.3591  35.1321    2.8  25.1  108.8   1.4252   4.1 ------	UNKNOWN                       
 37.4954  52.3703    2.9  50.6   14.5   3.0252   4.1 ------	UNKNOWN                       
 12.6179  63.3848    3.4  33.7   12.6   1.1204   3.3 ------	UNKNOWN                       
301.5488  57.5503    0.6   0.0   34.2   4.5918  18.0 ------	UNKNOWN                       
275.0715  56.1138    2.1  14.5 -121.6   1.4588   5.6 ------	UNKNOWN                       
100.1020  63.8875    4.3  57.5  -26.2   4.7473   2.9 ------	UNKNOWN                       
100.2897  63.7649    4.1  57.6  -26.3   5.6368   3.5 ------	UNKNOWN