batgrbproduct analysis for trigger=832368

batgrbproduct Analysis for Trigger=832368

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): Thu May 31 13:15:07 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger832368
======================================================================

  Trigger: 00832368      Segment: 000

  BAT Trigger Time: 547997154.432   [s; MET]
      Trigger Stop: 547997156.48   [s; MET]
               UTC: 2018-05-14T13:25:33.490260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 197.400829211167   Dec: 36.9695482478951  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.83
     Image Trigger?:     NO
     Rate S/N Ratio:     10.3923048454133  [ if not an image trigger ]
     Image S/N Ratio:    7.83

  Flight Position:   [ source = BAT ]
    RA: 197.400829211167   Dec: 36.9695482478951  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 197.384564570651   Dec: 36.9706469279382  [deg; J2000]  
        { 13h 09m 32.3s , +36d 58' 14.3" }
         +/- 1.29094113469072 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.448750463360856 [arcmin] (formal 1-sigma fit error)
    SNR: 21.1193530046473
 
  Angular difference between Flight and Ground position is 0.782459 arcmin
 
  Partial Coding Fraction: 0.9140625    [ including projection effects ]

  Duration
     T90: 31.1599999666214 +/- 4.10507831355118
        Measured from: -6.5440000295639
                   to: 24.6159999370575     [s; relative to TRIGTIME]
     T50: 15.6480000019073 +/- 2.21677241539886
        Measured from: 0.867999911308289
                   to: 16.5159999132156     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.291999936103821     
                   to: 1.29199993610382     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.36000001430511     
                   to: 28.5999999046326     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.557049   0.623724   0.372586   0.045441
           0.037852   0.039297   0.033726   0.028243 [error]
 Peak      0.035659   0.028810   0.025377   0.007223
           0.006463   0.006628   0.005829   0.004872 [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 1.57e-07 2.48e-07 2.96e-07 6.87e-07 9.02e-07 1.39e-06   erg/cm2
              Error 1.74e-08 1.77e-08 3.24e-08 1.54e-07 7.56e-08 1.85e-07   erg/cm2
Peak flux Power-law 2.85e-01 2.47e-01 1.46e-01 1.30e-01 7.35e-01 8.09e-01   ph/cm2/s
              Error 8.52e-02 5.00e-02 4.70e-02 8.21e-02 1.49e-01 1.71e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.49e-07 2.63e-07 2.96e-07 3.12e-07 8.57e-07 1.02e-06   erg/cm2
              Error 1.98e-08 2.36e-08 3.52e-08 2.94e-07 8.84e-08 3.11e-07   erg/cm2
Peak flux Cutoff-PL 2.85e-01 2.47e-01 1.46e-01 1.28e-01 7.34e-01 8.06e-01   ph/cm2/s
              Error -------- 5.79e-02 4.72e-02 9.24e-02 1.50e-01 1.86e-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    1.746    0.130    -      -           2.64e-03 2.12e-04   57.470 57
CPL   1.268    0.556      68.4  -25.3      4.84e-03 3.82e-03   55.020 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.754    0.378    -      -           5.43e-03 1.32e-03   49.440 57
CPL   1.741    1.239     801.9   -0.0      5.52e-03 1.67e-02   49.440 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: 20.992000 sec.
T50 in the 50-300 keV band: 11.392000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   36.960   -8.360   28.600
T90    31.160   -6.544   24.616
T50    15.648    0.868   16.516
Peak    1.000    0.292    1.292

Click here for the BAT GCN circular template

Special notes of this burst

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
  197.3846    36.9706   0.0091    15.6440    47.0382         1.5743042     21.119 TRIG_00832368                 
 
Foreground time interval of the image:
 -8.360  28.600 (delta_t =  36.960 [sec])
Background time interval of the image:
-657.231 -643.404 (delta_t =  13.828 [sec])
-239.432  -8.360 (delta_t = 231.072 [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 2.048000

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 2.048000

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 2.048000

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   -8.360 sec. to   28.600 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74574     ( -0.128477   0.131162 )
Norm@50keV  : 2.64188E-03    ( -0.000213084   0.000210625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.47 using 59 PHA bins.
# Reduced chi-squared =          1.008 for     57 degrees of freedom 
# Null hypothesis probability =   4.574790e-01
 
Photon flux (15-150 keV)    in 36.96 sec: 0.356684 ( -0.025593  0.025606 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.01347e-07 ( -7.51153e-08  7.61195e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -8.360 sec. to   28.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26751     ( -0.596717   0.516255 )
Epeak [keV] : 68.3793      ( -17.8582 -68.3793 )
Norm@50keV  : 4.84475E-03    ( -0.00226496   0.00538008 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.02 using 59 PHA bins.
# Reduced chi-squared =         0.9825 for     56 degrees of freedom 
# Null hypothesis probability =   5.120749e-01
 
Photon flux (15-150 keV)    in 36.96 sec: 0.349020 ( -0.02698  0.026884 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.57298e-07 ( -8.76684e-08  8.92048e-08 ) ergs/cm2

Band function

Time interval is from   -8.360 sec. to   28.600 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]    : 11.8972  (-1.01054  1.1177)
R^2/D10^2   : 8.83139E-02  (-0.0249621   0.0343969)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.89 using 59 PHA bins.
# Reduced chi-squared =          1.595 for     57 degrees of freedom 
# Null hypothesis probability =   2.885094e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.764e-08   1.379e-08
25- 50  3.042e-07   2.683e-08
50-150  2.574e-07   4.760e-08
15-150  6.592e-07   6.043e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 112.005       (-29.1137      44.5928)
Norm        : 1.53251       (-0.139962     0.172201)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.99 using 59 PHA bins.
# Reduced chi-squared =         0.9647 for     57 degrees of freedom 
# Null hypothesis probability =   5.509578e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.479e-07   1.573e-08
25- 50  2.613e-07   2.358e-08
50-150  4.503e-07   1.547e-07
15-150  8.595e-07   1.818e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.54559        (-1.36984      2.03105)
R1^2/D10^2  : 0.881131        (-0.559127      1.72546)
kT2 [keV]   : 18.7627        (-3.48153      8.07158)
R2^2/D10^2  : 1.29399E-02    (-0.00982524   0.0119703)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.39 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     55 degrees of freedom 
# Null hypothesis probability =   4.229029e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.510e-07   6.198e-08
25- 50  2.569e-07   6.978e-08
50-150  4.154e-07   1.405e-07
15-150  8.234e-07   2.325e-07

Peak spectrum fit

Power-law model

Time interval is from    0.292 sec. to    1.292 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.75359     ( -0.362931   0.392687 )
Norm@50keV  : 5.42522E-03    ( -0.00135494   0.00129461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.44 using 59 PHA bins.
# Reduced chi-squared =         0.8673 for     57 degrees of freedom 
# Null hypothesis probability =   7.514427e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.734589 ( -0.148766  0.148768 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.00587e-08 ( -1.24845e-08  1.29746e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.292 sec. to    1.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74090     ( -1.428   1.05029 )
Epeak [keV] : 801.898      ( -894.124 -894.134 )
Norm@50keV  : 5.51814E-03    ( -0.00144527   0.0320243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.44 using 59 PHA bins.
# Reduced chi-squared =         0.8828 for     56 degrees of freedom 
# Null hypothesis probability =   7.198564e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.734298 ( -0.150589  0.149018 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.99839e-08 ( -1.42903e-08  1.08576e-08 ) ergs/cm2

Band function

Time interval is from    0.292 sec. to    1.292 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]    : 9.16883  (-2.48532  4.70273)
R^2/D10^2   : 0.463455  (-0.354405   1.06949)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.15 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     57 degrees of freedom 
# Null hypothesis probability =   4.326887e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.657e-09   3.351e-09
25- 50  1.675e-08   7.468e-09
50-150  6.762e-09   4.102e-09
15-150  3.117e-08   1.271e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 108.046       (-58.8979      -108.433)
Norm        : 3.20028       (-0.756794     1.14816)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.77 using 59 PHA bins.
# Reduced chi-squared =         0.8732 for     57 degrees of freedom 
# Null hypothesis probability =   7.404513e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.360e-09   3.659e-09
25- 50  1.468e-08   8.561e-09
50-150  2.482e-08   1.829e-08
15-150  4.785e-08   3.016e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.84403        (-1.63511      2.13485)
R1^2/D10^2  : 2.00070        (-1.37733      2.8083)
kT2 [keV]   : 27.2192        (-10.8543      53.4958)
R2^2/D10^2  : 7.10433E-03    (-0.00661755   0.0337273)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.78 using 59 PHA bins.
# Reduced chi-squared =         0.8506 for     55 degrees of freedom 
# Null hypothesis probability =   7.769585e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.606e-09   5.530e-09
25- 50  1.338e-08   7.015e-09
50-150  2.854e-08   1.726e-08
15-150  5.152e-08   2.827e-08

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: 1.74574     ( -0.128477   0.131162 )
Norm@50keV  : 2.64188E-03    ( -0.000213084   0.000210625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.47 using 59 PHA bins.
# Reduced chi-squared =          1.008 for     57 degrees of freedom 
# Null hypothesis probability =   4.574790e-01
 
Photon flux (15-150 keV)    in 36.96 sec: 0.356667 ( -0.0255907  0.0256042 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.01222e-07 ( -7.52021e-08  7.61073e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26749     ( -0.596709   0.516263 )
Epeak [keV] : 68.3776      ( -17.8579 -68.379 )
Norm@50keV  : 4.84493E-03    ( -0.00226498   0.00538004 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.02 using 59 PHA bins.
# Reduced chi-squared =         0.9825 for     56 degrees of freedom 
# Null hypothesis probability =   5.120749e-01
 
Photon flux (15-150 keV)    in 36.96 sec: 0.348962 ( -0.026971  0.026875 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.57564e-07 ( -8.7732e-08  8.92658e-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)  = 2.48e-07
S(50-100 keV) = 2.96e-07

T90 vs. Hardness ratio plot

T90                                   = 31.1599999666214 sec.
Hardness ratio (energy fluence ratio) = 1.19355

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.11969
Count Ratio (50-100 keV) / (15-25 keV) = 0.668857

Mask shadow pattern

IMX = 1.908452745266090E-01, IMY = -2.049304000518498E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-657.231410 -643.403600
-239.432000 -8.360000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
201.5431   4.2131    3.3  40.9   98.2   3.5463   3.6 ------	UNKNOWN                       
174.7324  21.2045    2.0  17.8  145.2   1.1532   5.7 ------	UNKNOWN                       
120.7975  27.9075    2.2  47.9 -129.0   5.3238   5.3 ------	UNKNOWN

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

Time interval of the image:
-8.360000 28.600000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
197.3846  36.9706    0.5  15.6   47.0   1.5744  21.1 ------	UNKNOWN                       
262.2776  68.8225    2.2  52.3  -16.7   0.9669   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
66.868590 962.718600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3553  35.4343   21.2  45.3   20.1   0.6038   0.5    7.4	Her X-1                       
215.2220  -0.3716    3.3  40.8   98.2   8.1671   3.5 ------	UNKNOWN                       
189.5543  -3.0865    2.3  40.7  138.2   7.0190   5.0 ------	UNKNOWN                       
232.1036  39.6414    3.2  27.2   19.8   2.0851   3.6 ------	UNKNOWN                       
276.4572  47.6576    3.8  56.9   -1.7   7.9561   3.0 ------	UNKNOWN                       
143.6725  10.7124    2.9  54.8 -158.1   9.5664   4.0 ------	UNKNOWN                       
157.4111  50.8047    3.6  31.5 -105.0   3.2032   3.2 ------	UNKNOWN                       
152.7710  69.0212    4.8  40.1  -76.9   5.8557   2.4 ------	UNKNOWN                       
137.6944  33.6866    3.6  48.0 -129.0   9.0523   3.2 ------	UNKNOWN

Plot creation:
Thu May 31 18:02:07 EDT 2018