Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon Jul 10 16:04:16 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger758766
======================================================================

  Trigger: 00758766      Segment: 000

  BAT Trigger Time: 520162662.4   [s; MET]
      Trigger Stop: 520162663.424   [s; MET]
               UTC: 2017-06-26T09:37:23.124540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 165.414032854002   Dec: 56.469149639052  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    26.2
     Image Trigger?:     NO
     Rate S/N Ratio:     255.998046867549  [ if not an image trigger ]
     Image S/N Ratio:    26.2

  Analysis Position:   [ source = BAT ]
    RA: 165.414032854002   Dec: 56.469149639052  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 165.407454415803   Dec: 56.47902475265  [deg; J2000]  
        { 11h 01m 37.8s , +56d 28' 44.5" }
         +/- 0.494911383654722 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.111162804471789 [arcmin] (formal 1-sigma fit error)
    SNR: 83.0821538277952
 
  Angular difference between the analysis and refined position is 0.631339 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 12.9479999542236 +/- 0.346594812827857
        Measured from: -1.23600000143051
                   to: 11.7119999527931     [s; relative to TRIGTIME]
     T50: 6.93999999761581 +/- 0.167904758511362
        Measured from: 0.555999994277954
                   to: 7.49599999189377     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0639999508857727     
                   to: 0.936000049114227     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.3439999818802     
                   to: 17.9240000247955     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.945277   5.513868   3.834443   0.768180
           0.050369   0.055965   0.050207   0.041409 [error]
 Peak      0.631920   1.157723   0.978048   0.214048
           0.014553   0.019017   0.018297   0.011193 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   39.268  -21.344   17.924
T90    12.948   -1.236   11.712
T50     6.940    0.556    7.496
Peak    1.000   -0.064    0.936
 
 
====== 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: CPL)
 
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      -1.602    -0.033      0.033       -           -               -         2.28e-02     -3.90e-04          3.90e-04      69.820   57
CPL     -1.256    -0.139      0.143      120.873     -19.614        42.515      3.25e-02     -4.20e-03          4.98e-03      51.110   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
 
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      -1.284     -0.038     0.038       -           -               -         1.98e-01     -4.35e-03          4.35e-03     101.130   57
CPL     -0.574     -0.172     0.178      113.944     -12.146        18.603      4.13e-01     -6.56e-02          8.11e-02      45.930   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   1.26e-06  2.18e-06  2.87e-06  7.69e-06  8.38e-06  1.40e-05   erg/cm2
      90%_error_low -4.54e-08 -4.52e-08 -5.83e-08 -3.60e-07 -1.45e-07 -3.85e-07   erg/cm2
      90%_error_hi   4.61e-08  4.51e-08  5.82e-08  3.73e-07  1.45e-07  3.94e-07   erg/cm2
Peak flux       PL   1.98e-03  2.43e-02  2.73e-01  2.49e+01  6.39e-01  2.35e+01   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
 
Fluence        CPL   1.15e-06  2.20e-06  2.95e-06  5.08e-06  8.19e-06  1.14e-05   erg/cm2
      90%_error_low -6.05e-08 -4.77e-08 -6.68e-08 -7.29e-07 -1.64e-07 -7.47e-07   erg/cm2
      90%_error_hi   6.17e-08  4.78e-08  6.72e-08  8.82e-07  1.64e-07  8.94e-07   erg/cm2
Peak flux      CPL   5.51e+00  7.86e+00  6.76e+00  4.71e+00  2.28e+01  2.48e+01   ph/cm2/s
      90%_error_low -3.63e-01 -2.22e-01 -1.96e-01 -5.80e-01 -5.77e-01 -8.45e-01   ph/cm2/s
      90%_error_hi   3.71e-01  2.23e-01  1.97e-01  6.76e-01  5.78e-01  9.02e-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
  165.4075    56.4790   0.0023     8.8308    79.2831        14.2750048     83.082 TRIG_00758766                 
 
Foreground time interval of the image:
-21.344  15.701 (delta_t =  37.045 [sec])
Background time interval of the image:
-240.099 -21.344 (delta_t = 218.755 [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  -21.344 sec. to   17.924 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.60178     ( -0.0331147   0.0331262 )
Norm@50keV  : 2.28323E-02    ( -0.00038966   0.000389639 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.82 using 59 PHA bins.
# Reduced chi-squared =          1.225 for     57 degrees of freedom 
# Null hypothesis probability =   1.184757e-01
 
Photon flux (15-150 keV)    in 39.27 sec: 2.93577 ( -0.05974  0.05998 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.38477e-06 ( -1.45273e-07  1.45067e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -21.344 sec. to   17.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.25611     ( -0.138998   0.143289 )
Epeak [keV] : 120.873      ( -19.6144 42.5142 )
Norm@50keV  : 3.24975E-02    ( -0.00420155   0.00498245 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.11 using 59 PHA bins.
# Reduced chi-squared =         0.9127 for     56 degrees of freedom 
# Null hypothesis probability =   6.599583e-01
 
Photon flux (15-150 keV)    in 39.27 sec: 2.84426 ( -0.06837  0.06882 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.18882e-06 ( -1.64447e-07  1.64154e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.064 sec. to    0.936 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.28424     ( -0.0376683   0.0376994 )
Norm@50keV  : 0.198390    ( -0.00435274   0.00435231 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         101.13 using 59 PHA bins.
# Reduced chi-squared =         1.7742 for     57 degrees of freedom 
# Null hypothesis probability =   2.877827e-04
 
Photon flux (15-150 keV)    in 1 sec: 0.638909 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.96834e-06 ( -4.57353e-08  4.58016e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.064 sec. to    0.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.574078     ( -0.171915   0.17846 )
Epeak [keV] : 113.944      ( -12.1454 18.603 )
Norm@50keV  : 0.412998    ( -0.0655989   0.0811096 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.93 using 59 PHA bins.
# Reduced chi-squared =         0.8201 for     56 degrees of freedom 
# Null hypothesis probability =   8.293732e-01
 
Photon flux (15-150 keV)    in 1 sec: 22.7767 ( -0.577  0.5783 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90818e-06 ( -4.89205e-08  4.88163e-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 = 2.889018277273836E-02, IMY = -1.526496343074728E-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:
-240.099410 -21.344000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
265.2522  71.2651    2.3  46.1   31.4   2.8585   5.1 ------	UNKNOWN                       
125.3249  28.3420    3.1  31.8 -127.9   1.2219   3.7 ------	UNKNOWN

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

    Time interval of the image:
-21.344000 15.700600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
165.0868  13.6807    2.1  42.6  165.9   1.7382   5.5 ------	UNKNOWN                       
165.4075  56.4790    0.1   8.8   79.3  14.2749  83.1 ------	UNKNOWN                       
 87.8512  46.1226    2.7  39.2  -68.2   2.1054   4.3 ------	UNKNOWN                       
117.0800  19.1761    2.7  43.4 -123.9   2.2811   4.2 ------	UNKNOWN                       
 85.2929  43.3271    2.4  42.4  -69.9   3.8926   4.8 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
47.500600 962.696700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
217.2132  34.8456    3.0  40.9  102.5  10.0515   3.8 ------	UNKNOWN                       
231.4073  48.5532    3.1  39.3   75.6   9.7066   3.7 ------	UNKNOWN                       
196.9263  17.0984    2.6  46.0  139.0  11.7826   4.4 ------	UNKNOWN                       
146.6283  77.1041    3.5  21.7   -8.1   2.2116   3.3 ------	UNKNOWN                       
134.2814  71.1746    2.9  19.7  -26.6   2.5391   4.0 ------	UNKNOWN