batgrbproduct analysis for trigger=767284

batgrbproduct Analysis for Trigger=767284

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Aug 28 18:04:05 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger767284
======================================================================

  Trigger: 00767284      Segment: 000

  BAT Trigger Time: 524095320.576   [s; MET]
      Trigger Stop: 524095321.6   [s; MET]
               UTC: 2017-08-10T22:01:41.068460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 187.950444369931   Dec: 3.64679568014333  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.65
     Image Trigger?:     NO
     Rate S/N Ratio:     23.3238075793812  [ if not an image trigger ]
     Image S/N Ratio:    9.65

  Flight Position:   [ source = BAT ]
    RA: 187.950444369931   Dec: 3.64679568014333  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 187.928317316525   Dec: 3.6653131335646  [deg; J2000]  
        { 12h 31m 42.8s , +03d 39' 55.1" }
         +/- 0.985284551288413 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.282370755904764 [arcmin] (formal 1-sigma fit error)
    SNR: 31.0681926494546
 
  Angular difference between Flight and Ground position is 1.729116 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 152.419999957085 +/- 21.4978838612162
        Measured from: -17.7759999632835
                   to: 134.643999993801     [s; relative to TRIGTIME]
     T50: 75.3639999628067 +/- 8.12083078420974
        Measured from: 7.03600001335144
                   to: 82.3999999761581     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.15200001001358     
                   to: 1.15200001001358     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -24.3319999575615     
                   to: 157.740000009537     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.648225   2.520860   2.180564   0.680986
           0.078790   0.083031   0.074593   0.066011 [error]
 Peak      0.023931   0.057249   0.053393   0.041267
           0.006309   0.007224   0.006861   0.005859 [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 4.63e-07 1.00e-06 1.72e-06 6.76e-06 4.70e-06 9.94e-06   erg/cm2
              Error 3.58e-08 4.43e-08 7.39e-08 6.97e-07 1.86e-07 7.31e-07   erg/cm2
Peak flux Power-law 1.91e-01 3.22e-01 4.12e-01 1.06e+00 1.22e+00 1.98e+00   ph/cm2/s
              Error 6.37e-02 6.45e-02 5.17e-02 3.20e-01 1.62e-01 3.10e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.63e-07 1.01e-06 1.72e-06 6.72e-06 4.73e-06 1.00e-05   erg/cm2
              Error 3.58e-08 4.43e-08 7.41e-08 -------- 1.86e-07 8.68e-07   erg/cm2
Peak flux Cutoff-PL 1.91e-01 3.22e-01 4.12e-01 1.05e+00 1.22e+00 2.06e+00   ph/cm2/s
              Error -------- 6.46e-02 -------- -------- 1.62e-01 4.98e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   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    1.227    0.070    -      -           2.57e-03 9.32e-05   61.220 57
CPL   1.227    0.097    9999.4    0.0      2.58e-03 1.45e-04   61.340 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.644    0.255    -      -           1.05e-02 1.52e-03   87.300 57
CPL   0.641    0.292    9999.3    0.0      1.06e-02 3.43e-03   87.340 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: 144.064000 sec.
T50 in the 50-300 keV band: 56.768000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  182.072  -24.332  157.740
T90   152.420  -17.776  134.644
T50    75.364    7.036   82.400
Peak    1.000    0.152    1.152

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  187.9283     3.6653   0.0062    24.3500  -166.6983         2.6110864     31.068 TRIG_00767284                 
 
Foreground time interval of the image:
-24.332  16.525 (delta_t =  40.857 [sec])
Background time interval of the image:
-239.576 -24.332 (delta_t = 215.244 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from  -24.332 sec. to  157.740 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22674     ( -0.0704736   0.0699957 )
Norm@50keV  : 2.56540E-03    ( -9.32103e-05   9.31616e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.22 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     57 degrees of freedom 
# Null hypothesis probability =   3.270881e-01
 
Photon flux (15-150 keV)    in 182.1 sec: 0.302310 ( -0.01168  0.01173 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.70501e-06 ( -1.85826e-07  1.86467e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -24.332 sec. to  157.740 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22699     ( -0.127725   0.06651 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 2.57746E-03    ( -9.32387e-05   0.00019752 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.34 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     56 degrees of freedom 
# Null hypothesis probability =   2.905632e-01
 
Photon flux (15-150 keV)    in 182.1 sec: 0.302231 ( -0.011693  0.011719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.72868e-06 ( -2.11371e-07  1.60768e-07 ) ergs/cm2

Band function

Time interval is from  -24.332 sec. to  157.740 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 19.8722  (  )
R^2/D10^2   : 1.34822E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         271.80 using 59 PHA bins.
# Reduced chi-squared =         4.7685 for     57 degrees of freedom 
# Null hypothesis probability =   9.575167e-30
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.874e-07   1.375e-08
25- 50  9.294e-07   5.208e-08
50-150  2.718e-06   1.684e-07
15-150  3.835e-06   1.721e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 1.27096       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         134.95 using 59 PHA bins.
# Reduced chi-squared =         2.3676 for     57 degrees of freedom 
# Null hypothesis probability =   2.877471e-08
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.763e-07   2.340e-08
25- 50  1.109e-06   4.389e-08
50-150  2.431e-06   1.011e-07
15-150  4.116e-06   1.712e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.14071        (-0.811929      0.88536)
R1^2/D10^2  : 0.181073        (-0.0526234      0.0781709)
kT2 [keV]   : 40.8721        (-5.82694      8.82622)
R2^2/D10^2  : 1.21529E-03    (-0.000498882   0.000690597)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.96 using 59 PHA bins.
# Reduced chi-squared =         0.8901 for     55 degrees of freedom 
# Null hypothesis probability =   7.035055e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.471e-07   5.336e-08
25- 50  1.044e-06   8.140e-08
50-150  3.364e-06   4.971e-07
15-150  4.855e-06   4.898e-07

Peak spectrum fit

Power-law model

Time interval is from    0.152 sec. to    1.152 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.643958     ( -0.267078   0.242263 )
Norm@50keV  : 1.04790E-02    ( -0.00155162   0.00148994 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.30 using 59 PHA bins.
# Reduced chi-squared =          1.532 for     57 degrees of freedom 
# Null hypothesis probability =   6.040391e-03
 
Photon flux (15-150 keV)    in 1 sec: 1.21745 ( -0.16185  0.16247 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.31256e-07 ( -1.72914e-08  1.73444e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.152 sec. to    1.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.640653     ( -0.344013   0.239797 )
Epeak [keV] : 9999.34      ( -9999.36 -9999.36 )
Norm@50keV  : 1.05776E-02    ( -0.00142554   0.00543635 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.34 using 59 PHA bins.
# Reduced chi-squared =          1.560 for     56 degrees of freedom 
# Null hypothesis probability =   4.653480e-03
 
Photon flux (15-150 keV)    in 1 sec: 1.21715 ( -0.16182  0.16243 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22098e-09 ( 0  0 ) ergs/cm2

Band function

Time interval is from    0.152 sec. to    1.152 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 31.1489  (-7.03481  11.6275)
R^2/D10^2   : 1.64609E-02  (-0.0163841   0.0178426)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         103.10 using 59 PHA bins.
# Reduced chi-squared =         1.8088 for     57 degrees of freedom 
# Null hypothesis probability =   1.791808e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.441e-09   7.885e-10
25- 50  1.529e-08   3.726e-09
50-150  1.031e-07   2.258e-08
15-150  1.209e-07   2.696e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (      )
Norm        : 4.76894       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         126.61 using 59 PHA bins.
# Reduced chi-squared =         2.2212 for     57 degrees of freedom 
# Null hypothesis probability =   3.366781e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.188e-08   6.680e-09
25- 50  2.284e-08   1.279e-08
50-150  5.010e-08   2.823e-08
15-150  8.482e-08   4.828e-08

Double BB

------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.40 using 59 PHA bins.
#Fit statistic : Chi-Squared =          80.39 using 59 PHA bins.
#Fit statistic : Chi-Squared =          80.38 using 59 PHA bins.
#Fit statistic : Chi-Squared =          80.37 using 59 PHA bins.
# Reduced chi-squared =          1.480 for     55 degrees of freedom 
# Reduced chi-squared =          1.462 for     55 degrees of freedom 
# Reduced chi-squared =          1.461 for     55 degrees of freedom 
# Reduced chi-squared =          1.461 for     55 degrees of freedom 
# Null hypothesis probability =   1.187732e-02
# Null hypothesis probability =   1.439515e-02
# Null hypothesis probability =   1.442658e-02
# Null hypothesis probability =   1.446204e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.450e-09   3.718e-09
25- 50  2.161e-08   1.237e-08
50-150  1.069e-07   9.565e-08
15-150  1.350e-07   1.093e-07

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.19336     ( -0.0939645   0.0929928 )
Norm@50keV  : 4.10067E-03    ( -0.000203418   0.000203309 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.12 using 59 PHA bins.
# Reduced chi-squared =         0.9144 for     57 degrees of freedom 
# Null hypothesis probability =   6.581851e-01
 
Photon flux (15-150 keV)    in 40.86 sec: 0.480890 ( -0.0250126  0.0251026 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.7031e-06 ( -9.27526e-08  9.30762e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.19407     ( -0.0993762   0.0891179 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 4.12080E-03    ( -0.000203709   0.000470585 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.20 using 59 PHA bins.
# Reduced chi-squared =         0.9321 for     56 degrees of freedom 
# Null hypothesis probability =   6.195024e-01
 
Photon flux (15-150 keV)    in 40.86 sec: 0.480900 ( -0.012502  0.024879 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69986e-06 ( -8.90217e-08  9.5404e-08 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 1.00e-06
S(50-100 keV) = 1.72e-06

T90 vs. Hardness ratio plot

T90                                   = 152.419999957085 sec.
Hardness ratio (energy fluence ratio) = 1.72

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.52944
Count Ratio (50-100 keV) / (15-25 keV) = 1.32298

Mask shadow pattern

IMX = -4.404271815784693E-01, IMY = 1.041262044138435E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.576000 -24.332000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.4263  77.7250    2.3  55.4    6.8   4.9805   4.9 ------	UNKNOWN

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

Time interval of the image:
-24.332000 16.524590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
187.9283   3.6653    0.4  24.4 -166.7   2.6111  31.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
65.524590 962.526900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
203.4986 -43.6546    3.3  49.3  148.0  10.3398   3.5 ------	UNKNOWN                       
217.5622  46.4955    3.8  49.9    9.2   4.6064   3.1 ------	UNKNOWN                       
202.5185  57.5994    2.6  55.1   -7.8   8.7898   4.4 ------	UNKNOWN

Plot creation:
Mon Sep 11 16:38:37 EDT 2017