batgrbproduct analysis for trigger=863186

batgrbproduct Analysis for Trigger=863186

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): Fri Oct 19 18:10:56 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger863186
======================================================================

  Trigger: 00863186      Segment: 000

  BAT Trigger Time: 559495364.032   [s; MET]
      Trigger Stop: 559495368.128   [s; MET]
               UTC: 2018-09-24T15:22:22.386320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 49.1609350574153   Dec: -58.5055477959711  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.17
     Image Trigger?:     NO
     Rate S/N Ratio:     10.4880884817015  [ if not an image trigger ]
     Image S/N Ratio:    7.17

  Flight Position:   [ source = BAT ]
    RA: 49.1609350574153   Dec: -58.5055477959711  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 49.2098608828787   Dec: -58.5224493217896  [deg; J2000]  
        { 03h 16m 50.4s , -58d 31' 20.8" }
         +/- 1.40435315712517 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.536650982067299 [arcmin] (formal 1-sigma fit error)
    SNR: 18.7256931069874
 
  Angular difference between Flight and Ground position is 1.838236 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 94.8159999847412 +/- 11.8424247997239
        Measured from: -76.4079999923706
                   to: 18.4079999923706     [s; relative to TRIGTIME]
     T50: 50.9559999704361 +/- 4.49904881592429
        Measured from: -48.4639999866486
                   to: 2.49199998378754     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.72800004482269     
                   to: 3.72800004482269     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -84.6679999828339     
                   to: 26.3480000495911     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.999787   1.012354   0.583051   0.058976
           0.061652   0.063441   0.054882   0.047138 [error]
 Peak      0.028997   0.026277   0.023644   0.007910
           0.006235   0.006405   0.005520   0.004630 [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 2.84e-07 4.02e-07 4.21e-07 8.11e-07 1.37e-06 1.92e-06   erg/cm2
              Error 3.07e-08 2.86e-08 5.24e-08 2.05e-07 1.18e-07 2.57e-07   erg/cm2
Peak flux Power-law 2.32e-01 2.07e-01 1.28e-01 1.20e-01 6.18e-01 6.87e-01   ph/cm2/s
              Error 7.68e-02 4.71e-02 4.30e-02 7.83e-02 1.40e-01 1.62e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.80e-07 4.08e-07 4.18e-07 6.07e-07 1.33e-06 1.71e-06   erg/cm2
              Error 3.38e-08 4.77e-08 5.47e-08 3.09e-07 1.27e-07 3.50e-07   erg/cm2
Peak flux Cutoff-PL 2.17e-01 2.24e-01 1.31e-01 5.58e-02 6.07e-01 6.27e-01   ph/cm2/s
              Error 8.57e-02 6.16e-02 4.90e-02 7.24e-02 1.42e-01 1.62e-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    1.933    0.142    -      -           1.33e-03 1.18e-04   64.300 57
CPL   1.785    0.503      62.0    0.0      1.62e-03 0.00e+00   64.050 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.697    0.397    -      -           4.65e-03 1.21e-03   41.550 57
CPL   1.086    1.639      66.5    0.0      1.02e-02 0.00e+00   41.010 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: 17.536000 sec.
T50 in the 50-300 keV band: 4.608000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  111.016  -84.668   26.348
T90    94.816  -76.408   18.408
T50    50.956  -48.464    2.492
Peak    1.000    2.728    3.728

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
   49.2099   -58.5224   0.0103     8.1964   145.8958         2.8680448     18.726 TRIG_00863186                 
 
Foreground time interval of the image:
-84.668  26.348 (delta_t = 111.016 [sec])
Background time interval of the image:
-239.032 -84.668 (delta_t = 154.364 [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 4.096000

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 4.096000

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 4.096000

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  -84.668 sec. to   26.348 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93334     ( -0.139737   0.144361 )
Norm@50keV  : 1.33307E-03    ( -0.000119449   0.000117395 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.30 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     57 degrees of freedom 
# Null hypothesis probability =   2.361537e-01
 
Photon flux (15-150 keV)    in 111 sec: 0.194088 ( -0.013936  0.013942 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36136e-06 ( -1.17152e-07  1.19156e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -84.668 sec. to   26.348 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78511     ( -0.557195   0.448014 )
Epeak [keV] : 61.9635      (   )
Norm@50keV  : 1.61787E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.05 using 59 PHA bins.
# Reduced chi-squared =          1.144 for     56 degrees of freedom 
# Null hypothesis probability =   2.148604e-01
 
Photon flux (15-150 keV)    in 111 sec: 0.192641 ( -0.014743  0.014703 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33737e-06 ( -1.40899e-07  1.13445e-07 ) ergs/cm2

Band function

Time interval is from  -84.668 sec. to   26.348 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]    : 9.75669  (-0.905831  1.03565)
R^2/D10^2   : 9.58635E-02  (-0.0306495   0.0438372)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         111.88 using 59 PHA bins.
# Reduced chi-squared =         1.9629 for     57 degrees of freedom 
# Null hypothesis probability =   1.948921e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.045e-07   2.681e-08
25- 50  4.908e-07   4.201e-08
50-150  2.384e-07   4.995e-08
15-150  9.336e-07   8.697e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 76.1744       (-17.3234      26.333)
Norm        : 0.916190       (-0.103945     0.123451)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.04 using 59 PHA bins.
# Reduced chi-squared =          1.159 for     57 degrees of freedom 
# Null hypothesis probability =   1.927934e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.630e-07   2.747e-08
25- 50  4.277e-07   3.041e-08
50-150  5.838e-07   1.094e-07
15-150  1.275e-06   1.482e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.17623        (-0.94125      0.998494)
R1^2/D10^2  : 0.424619        (-0.178725      0.365237)
kT2 [keV]   : 24.1963        (-5.3207      9.12065)
R2^2/D10^2  : 2.28588E-03    (-0.00152254   0.00351503)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.26 using 59 PHA bins.
# Reduced chi-squared =          1.096 for     55 degrees of freedom 
# Null hypothesis probability =   2.912436e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.750e-07   6.066e-08
25- 50  4.104e-07   8.863e-08
50-150  6.653e-07   3.441e-07
15-150  1.351e-06   4.293e-07

Peak spectrum fit

Power-law model

Time interval is from    2.728 sec. to    3.728 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69736     ( -0.381933   0.412698 )
Norm@50keV  : 4.65356E-03    ( -0.00123752   0.00119157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.55 using 59 PHA bins.
# Reduced chi-squared =         0.7289 for     57 degrees of freedom 
# Null hypothesis probability =   9.381908e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.617500 ( -0.139807  0.139816 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.31023e-08 ( -1.16603e-08  1.21004e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.728 sec. to    3.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08553     ( -1.93051   1.34799 )
Epeak [keV] : 66.4798      (   )
Norm@50keV  : 1.02365E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.01 using 59 PHA bins.
# Reduced chi-squared =         0.7323 for     56 degrees of freedom 
# Null hypothesis probability =   9.335717e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.607498 ( -0.141569  0.141652 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.08131e-08 ( -1.22964e-08  1.31429e-08 ) ergs/cm2

Band function

Time interval is from    2.728 sec. to    3.728 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]    : 11.9827  (-3.19164  4.41456)
R^2/D10^2   : 0.154038  (-0.103975   0.317587)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.28 using 59 PHA bins.
# Reduced chi-squared =         0.7943 for     57 degrees of freedom 
# Null hypothesis probability =   8.686999e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.677e-09   2.495e-09
25- 50  1.470e-08   5.907e-09
50-150  1.267e-08   6.805e-09
15-150  3.205e-08   1.356e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 127.969       (-72.3567      -124.725)
Norm        : 2.59883       (-0.645495     0.977094)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.07 using 59 PHA bins.
# Reduced chi-squared =         0.7206 for     57 degrees of freedom 
# Null hypothesis probability =   9.446243e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.749e-09   4.031e-09
25- 50  1.221e-08   7.100e-09
50-150  2.246e-08   1.509e-08
15-150  4.142e-08   2.593e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.47154        (-2.89521      5.16072)
R1^2/D10^2  : 1.64279        (-1.45627      38.5123)
kT2 [keV]   : 19.7176        (-7.63172      60.0932)
R2^2/D10^2  : 1.98797E-02    (-0.0196611   0.114113)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.53 using 59 PHA bins.
# Reduced chi-squared =         0.7369 for     55 degrees of freedom 
# Null hypothesis probability =   9.276238e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.152e-09   4.007e-09
25- 50  1.197e-08   5.950e-09
50-150  2.154e-08   1.314e-08
15-150  4.067e-08   2.145e-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: 1.93334     ( -0.139737   0.144361 )
Norm@50keV  : 1.33307E-03    ( -0.000119449   0.000117395 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.30 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     57 degrees of freedom 
# Null hypothesis probability =   2.361537e-01
 
Photon flux (15-150 keV)    in 111 sec: 0.194075 ( -0.0139346  0.0139409 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36112e-06 ( -1.17238e-07  1.19154e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78511     ( -0.557195   0.448122 )
Epeak [keV] : 61.9634      (   )
Norm@50keV  : 1.61787E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.05 using 59 PHA bins.
# Reduced chi-squared =          1.144 for     56 degrees of freedom 
# Null hypothesis probability =   2.148604e-01
 
Photon flux (15-150 keV)    in 111 sec: 0.192598 ( -0.014738  0.014717 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33774e-06 ( -1.41125e-07  1.37129e-07 ) 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)  = 4.02e-07
S(50-100 keV) = 4.21e-07

T90 vs. Hardness ratio plot

T90                                   = 94.8159999847412 sec.
Hardness ratio (energy fluence ratio) = 1.04726

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.01257
Count Ratio (50-100 keV) / (15-25 keV) = 0.583175

Mask shadow pattern

IMX = -1.192668647637723E-01, IMY = -8.076260146427267E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.032000 -84.668000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
301.3202 -58.7217    2.5  43.2    4.9   1.3705   4.6 ------	UNKNOWN                       
261.5779 -68.7336    2.9  42.5  -24.3   1.1116   3.9 ------	UNKNOWN

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

Time interval of the image:
-84.668000 26.348000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 49.2098 -58.5224    0.6   8.2  145.9   2.8681  18.7 ------	UNKNOWN                       
 73.6148 -35.5053    2.1  34.7  177.7   1.1074   5.5 ------	UNKNOWN                       
105.6027 -32.1532    2.5  48.4 -147.1   1.9031   4.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
63.268610 635.768610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 59.6292 -24.6671    2.1  34.7  159.0   3.6551   5.4 ------	UNKNOWN                       
 80.8303 -27.0944    2.5  38.4 -169.0   2.6336   4.7 ------	UNKNOWN                       
338.0697 -80.6568    2.9  29.7  -19.8   1.8319   4.0 ------	UNKNOWN                       
 59.0261 -79.4971    2.5  21.2  -42.8   1.9854   4.7 ------	UNKNOWN                       
 99.1102 -46.1195    3.8  32.0 -128.3   1.5994   3.0 ------	UNKNOWN                       
 97.8221 -16.5671    2.4  55.0 -156.4   8.2549   4.9 ------	UNKNOWN                       
109.5973 -56.5174    3.3  31.4 -104.9   2.3120   3.6 ------	UNKNOWN                       
113.1635 -34.2186    2.5  48.0 -129.1   8.6647   4.6 ------	UNKNOWN

Plot creation:
Fri Oct 26 12:23:41 EDT 2018