batgrbproduct analysis for trigger=866434

batgrbproduct Analysis for Trigger=866434

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 Dec 17 19:02:17 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger866434
======================================================================

  Trigger: 00866434      Segment: 000

  BAT Trigger Time: 560843773.44   [s; MET]
      Trigger Stop: 560843774.464   [s; MET]
               UTC: 2018-10-10T05:55:51.710680    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 52.5574971856556   Dec: -23.0353985197853  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.39
     Image Trigger?:     NO
     Rate S/N Ratio:     12.6491106406735  [ if not an image trigger ]
     Image S/N Ratio:    7.39

  Flight Position:   [ source = BAT ]
    RA: 52.5574971856556   Dec: -23.0353985197853  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 52.5696135071614   Dec: -23.0194997798423  [deg; J2000]  
        { 03h 30m 16.7s , -23d 01' 10.2" }
         +/- 1.44710639313661 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.440752078974865 [arcmin] (formal 1-sigma fit error)
    SNR: 17.940395190335
 
  Angular difference between Flight and Ground position is 1.165162 arcmin
 
  Partial Coding Fraction: 0.8515625    [ including projection effects ]

  Duration
     T90: 15.5639998912811 +/- 2.19279273395347
        Measured from: -2.37600004673004
                   to: 13.1879998445511     [s; relative to TRIGTIME]
     T50: 8.03199994564056 +/- 0.964895872208353
        Measured from: 0.247999906539917
                   to: 8.27999985218048     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.43199992179871     
                   to: 8.43199992179871     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.0440000295639     
                   to: 15.2119998931885     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.332657   0.395702   0.320685   0.066890
           0.029997   0.031442   0.027636   0.023447 [error]
 Peak      0.034974   0.063433   0.065319   0.017348
           0.007515   0.008179   0.007567   0.006408 [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 9.50e-08 1.73e-07 2.41e-07 7.07e-07 6.93e-07 1.22e-06   erg/cm2
              Error 1.33e-08 1.48e-08 2.73e-08 1.71e-07 6.56e-08 1.92e-07   erg/cm2
Peak flux Power-law 3.69e-01 4.50e-01 3.98e-01 6.06e-01 1.43e+00 1.82e+00   ph/cm2/s
              Error 9.23e-02 6.86e-02 6.14e-02 2.00e-01 1.91e-01 2.60e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.36e-08 1.75e-07 2.43e-07 6.01e-07 6.88e-07 1.11e-06   erg/cm2
              Error 1.31e-08 1.73e-08 2.84e-08 2.40e-07 7.12e-08 3.19e-07   erg/cm2
Peak flux Cutoff-PL 3.45e-01 4.63e-01 4.11e-01 4.14e-01 1.41e+00 1.63e+00   ph/cm2/s
              Error 1.11e-01 7.85e-02 7.12e-02 2.52e-01 1.99e-01 3.36e-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    1.516    0.147    -      -           3.80e-03 3.26e-04   56.200 57
CPL   1.420    0.396     271.1    0.0      4.26e-03 2.63e-03   56.140 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.178    0.230    -      -           1.22e-02 1.60e-03   61.240 57
CPL   0.846    0.796     182.6    0.0      1.77e-02 2.33e-02   60.840 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: 10.112000 sec.
T50 in the 50-300 keV band: 8.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   19.256   -4.044   15.212
T90    15.564   -2.376   13.188
T50     8.032    0.248    8.280
Peak    1.000    7.432    8.432

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
   52.5696   -23.0195   0.0107    26.5241  -152.8488         1.1086751     17.940 TRIG_00866434                 
 
Foreground time interval of the image:
 -4.044  15.061 (delta_t =  19.105 [sec])
Background time interval of the image:
-239.440  -4.044 (delta_t = 235.396 [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   -4.044 sec. to   15.212 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51618     ( -0.146592   0.147586 )
Norm@50keV  : 3.80319E-03    ( -0.000327136   0.000325097 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.20 using 59 PHA bins.
# Reduced chi-squared =         0.9860 for     57 degrees of freedom 
# Null hypothesis probability =   5.050662e-01
 
Photon flux (15-150 keV)    in 19.26 sec: 0.476896 ( -0.04004  0.040077 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.93164e-07 ( -6.52119e-08  6.59143e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -4.044 sec. to   15.212 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42013     ( -0.558717   0.233291 )
Epeak [keV] : 271.148      ( -297.266 -297.266 )
Norm@50keV  : 4.26478E-03    ( -0.00140632   0.00386299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.14 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     56 degrees of freedom 
# Null hypothesis probability =   4.696026e-01
 
Photon flux (15-150 keV)    in 19.26 sec: 0.474975 ( -0.041331  0.041092 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.8749e-07 ( -7.23604e-08  7.01389e-08 ) ergs/cm2

Band function

Time interval is from   -4.044 sec. to   15.212 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]    : 14.3367  (-1.67979  1.9479)
R^2/D10^2   : 6.16930E-02  (-0.0221988   0.0342755)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          98.56 using 59 PHA bins.
# Reduced chi-squared =          1.729 for     57 degrees of freedom 
# Null hypothesis probability =   5.266406e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.146e-08   8.455e-09
25- 50  1.959e-07   2.076e-08
50-150  2.683e-07   4.805e-08
15-150  5.157e-07   5.624e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-59.3037      -200)
Norm        : 1.94660       (-0.160377     0.160377)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.59 using 59 PHA bins.
# Reduced chi-squared =         0.9929 for     57 degrees of freedom 
# Null hypothesis probability =   4.902681e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.337e-08   9.495e-09
25- 50  1.796e-07   4.128e-08
50-150  3.939e-07   1.389e-07
15-150  6.669e-07   1.639e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.91436        (-1.41335      1.64389)
R1^2/D10^2  : 0.565299        (-0.289751      0.706145)
kT2 [keV]   : 29.0721        (-6.663      13.4989)
R2^2/D10^2  : 4.26505E-03    (-0.00297714   0.00635462)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.70 using 59 PHA bins.
# Reduced chi-squared =         0.9764 for     55 degrees of freedom 
# Null hypothesis probability =   5.243174e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.362e-08   3.042e-08
25- 50  1.778e-07   4.840e-08
50-150  4.246e-07   2.160e-07
15-150  6.960e-07   2.412e-07

Peak spectrum fit

Power-law model

Time interval is from    7.432 sec. to    8.432 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17783     ( -0.232748   0.227914 )
Norm@50keV  : 1.22037E-02    ( -0.00160278   0.00160239 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.24 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     57 degrees of freedom 
# Null hypothesis probability =   3.264013e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.42816 ( -0.19105  0.19135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24615e-07 ( -1.84063e-08  1.86269e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    7.432 sec. to    8.432 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.846355     ( -1.06232   0.529411 )
Epeak [keV] : 182.576      ( -182.579 -182.579 )
Norm@50keV  : 1.76990E-02    ( -0.00869393   0.0378323 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.84 using 59 PHA bins.
# Reduced chi-squared =          1.086 for     56 degrees of freedom 
# Null hypothesis probability =   3.058428e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.40862 ( -0.19936  0.19828 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2154e-07 ( -2.05473e-08  2.02547e-08 ) ergs/cm2

Band function

Time interval is from    7.432 sec. to    8.432 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]    : 18.4541  (-2.96864  3.77988)
R^2/D10^2   : 8.57142E-02  (-0.0391363   0.067746)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.10 using 59 PHA bins.
# Reduced chi-squared =          1.230 for     57 degrees of freedom 
# Null hypothesis probability =   1.141327e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.797e-09   1.561e-09
25- 50  2.730e-08   5.775e-09
50-150  6.791e-08   1.717e-08
15-150  1.010e-07   2.134e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-42.4735      -200)
Norm        : 5.84837       (-0.784449     0.784449)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.78 using 59 PHA bins.
# Reduced chi-squared =          1.189 for     57 degrees of freedom 
# Null hypothesis probability =   1.553852e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.456e-08   8.225e-09
25- 50  2.801e-08   1.559e-08
50-150  6.144e-08   3.430e-08
15-150  1.040e-07   5.760e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.71579        (-2.79669      7.17919)
R1^2/D10^2  : 1.23118        (-1.06353      7.67985)
kT2 [keV]   : 26.7167        (-7.14019      -26.7167)
R2^2/D10^2  : 2.20550E-02    (-0.0212227   0.042762)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.78 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     55 degrees of freedom 
# Null hypothesis probability =   2.756142e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.116e-08   6.575e-09
25- 50  2.622e-08   1.403e-08
50-150  8.233e-08   4.641e-08
15-150  1.197e-07   6.194e-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: 1.51932     ( -0.146873   0.147902 )
Norm@50keV  : 3.82325E-03    ( -0.000328702   0.000326606 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.18 using 59 PHA bins.
# Reduced chi-squared =         0.9505 for     57 degrees of freedom 
# Null hypothesis probability =   5.816925e-01
 
Photon flux (15-150 keV)    in 19.1 sec: 0.479814 ( -0.04024  0.040294 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.90608e-07 ( -6.50336e-08  6.56366e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44653     ( -0.553208   0.210072 )
Epeak [keV] : 371.285      ( -371.292 -371.292 )
Norm@50keV  : 4.17123E-03    ( -0.000987724   0.00375734 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.12 using 59 PHA bins.
# Reduced chi-squared =         0.9664 for     56 degrees of freedom 
# Null hypothesis probability =   5.464778e-01
 
Photon flux (15-150 keV)    in 19.1 sec: 0.478263 ( -0.041544  0.041248 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.86597e-07 ( -7.20796e-08  6.90561e-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)  = 1.73e-07
S(50-100 keV) = 2.41e-07

T90 vs. Hardness ratio plot

T90                                   = 15.5639998912811 sec.
Hardness ratio (energy fluence ratio) = 1.39306

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.18952
Count Ratio (50-100 keV) / (15-25 keV) = 0.964011

Mask shadow pattern

IMX = -4.441075137294401E-01, IMY = 2.277622207855807E-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:
-239.440000 -4.044000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
325.4875 -13.0877    3.4  57.1    7.1   4.5463   3.4 ------	UNKNOWN                       
333.1154 -13.0016    3.6  49.8    9.3   1.5803   3.2 ------	UNKNOWN                       
 16.5645 -15.6778    2.3   8.1   26.3   1.0601   5.1 ------	UNKNOWN                       
346.3697 -42.5266    2.5  40.7  -34.1   1.5013   4.6 ------	UNKNOWN                       
355.9793 -58.1200    2.6  45.4  -57.7   4.6895   4.4 ------	UNKNOWN

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

Time interval of the image:
-4.044000 15.060600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 64.4548  -9.3357    2.2  39.5 -175.8   0.4301   5.2 ------	UNKNOWN                       
 52.5696 -23.0195    0.6  26.5 -152.8   1.1087  17.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
76.060600 619.860590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6409  22.0256    0.9  54.3 -178.6  20.1358  13.4    0.8	Crab                          
 26.3282   7.4479    2.5  39.8  102.2   7.2632   4.7 ------	UNKNOWN                       
  0.6313 -26.3557    3.7  47.0   40.1   4.5988   3.1 ------	UNKNOWN                       
 15.1942 -54.8492    2.7  42.2   -3.3   2.9085   4.2 ------	UNKNOWN

Plot creation:
Mon Dec 17 21:21:16 EST 2018