batgrbproduct analysis for trigger=869494

batgrbproduct Analysis for Trigger=869494

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 16:27:59 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger869494
======================================================================

  Trigger: 00869494      Segment: 000

  BAT Trigger Time: 562555664   [s; MET]
      Trigger Stop: 562555728   [s; MET]
               UTC: 2018-10-30T01:27:22.164360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 146.922199813726   Dec: 14.6579611316373  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    17.58
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    17.58

  Flight Position:   [ source = BAT ]
    RA: 146.922199813726   Dec: 14.6579611316373  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 146.916387552657   Dec: 14.657221636123  [deg; J2000]  
        { 09h 47m 39.9s , +14d 39' 26.0" }
         +/- 1.08526543769756 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.402269405279989 [arcmin] (formal 1-sigma fit error)
    SNR: 27.0615523221203
 
  Angular difference between Flight and Ground position is 0.340291 arcmin
 
  Partial Coding Fraction: 0.7109375    [ including projection effects ]

  Duration
     T90: 303.195999979973 +/- 78.5981634979086
        Measured from: 18.2439999580383
                   to: 321.439999938011     [s; relative to TRIGTIME]
     T50: 95.191999912262 +/- 12.1475614086886
        Measured from: 56
                   to: 151.191999912262     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 71.3279999494553     
                   to: 72.3279999494553     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 3.19200003147125     
                   to: 443.003999948502     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.113751   4.162622   2.668422   0.569505
           0.153047   0.158696   0.137470   0.116817 [error]
 Peak      0.038323   0.027252   0.031925   0.025538
           0.008462   0.009022   0.007804   0.006434 [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 1.05e-06 1.68e-06 2.02e-06 4.79e-06 6.11e-06 9.54e-06   erg/cm2
              Error 8.27e-08 8.03e-08 1.35e-07 6.74e-07 3.17e-07 7.84e-07   erg/cm2
Peak flux Power-law 2.86e-01 2.82e-01 1.95e-01 2.12e-01 8.47e-01 9.75e-01   ph/cm2/s
              Error 1.29e-01 7.64e-02 6.58e-02 1.56e-01 2.17e-01 2.47e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.90e-07 1.75e-06 2.05e-06 2.62e-06 5.94e-06 7.39e-06   erg/cm2
              Error 9.80e-08 9.92e-08 1.43e-07 1.38e-06 3.64e-07 1.42e-06   erg/cm2
Peak flux Cutoff-PL 2.86e-01 2.81e-01 1.92e-01 2.38e-01 8.60e-01 9.70e-01   ph/cm2/s
              Error 1.30e-01 7.82e-02 -------- -------- 2.17e-01 2.47e-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    1.730    0.086    -      -           1.51e-03 7.46e-05   62.270 57
CPL   1.337    0.356      80.8   97.7      2.41e-03 1.05e-03   58.370 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.533    0.498    -      -           6.72e-03 1.76e-03   59.140 57
CPL   2.023    0.134       9.3    0.0      3.67e-03 0.00e+00   58.810 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: 157.568000 sec.
T50 in the 50-300 keV band: 68.480000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  439.812    3.192  443.004
T90   303.196   18.244  321.440
T50    95.192   56.000  151.192
Peak    1.000   71.328   72.328

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
  146.9164    14.6572   0.0071    35.7683    -6.4828         4.1669157     27.062 TRIG_00869494                 
 
Foreground time interval of the image:
  3.192  72.501 (delta_t =  69.309 [sec])
Background time interval of the image:
-217.899   3.192 (delta_t = 221.091 [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 64.000000

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 64.000000

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 64.000000

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    3.192 sec. to  443.004 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72987     ( -0.0852865   0.0862003 )
Norm@50keV  : 1.50718E-03    ( -7.47846e-05   7.44157e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.27 using 59 PHA bins.
# Reduced chi-squared =          1.092 for     57 degrees of freedom 
# Null hypothesis probability =   2.941778e-01
 
Photon flux (15-150 keV)    in 439.8 sec: 0.202314 ( -0.009784  0.009801 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.12483e-06 ( -3.15645e-07  3.17533e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    3.192 sec. to  443.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33671     ( -0.369857   0.341355 )
Epeak [keV] : 80.7888      ( -19.0374 176.339 )
Norm@50keV  : 2.41114E-03    ( -0.00079076   0.00131065 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.37 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     56 degrees of freedom 
# Null hypothesis probability =   3.884842e-01
 
Photon flux (15-150 keV)    in 439.8 sec: 0.197881 ( -0.010475  0.010483 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.91597e-06 ( -3.63385e-07  3.63822e-07 ) ergs/cm2

Band function

Time interval is from    3.192 sec. to  443.004 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]    : 12.8629  (  )
R^2/D10^2   : 3.70683E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         152.89 using 59 PHA bins.
# Reduced chi-squared =         2.6823 for     57 degrees of freedom 
# Null hypothesis probability =   1.053857e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.721e-07   5.344e-08
25- 50  1.948e-06   1.080e-07
50-150  2.025e-06   2.111e-07
15-150  4.545e-06   2.423e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 126.359       (-24.9041      30.0535)
Norm        : 0.843443       (-0.0501043     0.0620194)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.39 using 59 PHA bins.
# Reduced chi-squared =          1.024 for     57 degrees of freedom 
# Null hypothesis probability =   4.239614e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.639e-07   7.762e-08
25- 50  1.740e-06   1.218e-07
50-150  3.183e-06   9.135e-07
15-150  5.887e-06   9.632e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.90531        (-0.978232      1.06252)
R1^2/D10^2  : 0.243006        (-0.0911596      0.168891)
kT2 [keV]   : 23.8782        (-3.64314      5.74025)
R2^2/D10^2  : 2.84984E-03    (-0.00157262   0.00261466)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.18 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     55 degrees of freedom 
# Null hypothesis probability =   3.940645e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.341e-07   1.599e-07
25- 50  1.780e-06   2.441e-07
50-150  3.162e-06   6.911e-07
15-150  5.877e-06   1.002e-06

Peak spectrum fit

Power-law model

Time interval is from   71.328 sec. to   72.328 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53260     ( -0.492543   0.502925 )
Norm@50keV  : 6.72420E-03    ( -0.00179413   0.00172587 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.14 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     57 degrees of freedom 
# Null hypothesis probability =   3.973825e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.847046 ( -0.216642  0.216624 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.34717e-08 ( -1.81058e-08  1.83183e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   71.328 sec. to   72.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02284     ( -0.264393   0.00425729 )
Epeak [keV] : 9.25550      (   )
Norm@50keV  : 3.66672E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.81 using 59 PHA bins.
# Reduced chi-squared =          1.050 for     56 degrees of freedom 
# Null hypothesis probability =   3.728887e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.860377 ( -0.227966  0.205523 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from   71.328 sec. to   72.328 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]    : 14.5068  (-5.72168  11.574)
R^2/D10^2   : 9.94382E-02  (-0.0961768   0.483898)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.09 using 59 PHA bins.
# Reduced chi-squared =          1.212 for     57 degrees of freedom 
# Null hypothesis probability =   1.309197e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.403e-09   2.770e-09
25- 50  1.695e-08   1.033e-08
50-150  2.391e-08   1.597e-08
15-150  4.527e-08   2.686e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-126.745      -199.363)
Norm        : 3.42841       (-0.860872     0.862089)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.11 using 59 PHA bins.
# Reduced chi-squared =          1.055 for     57 degrees of freedom 
# Null hypothesis probability =   3.636245e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.537e-09   5.065e-09
25- 50  1.642e-08   9.840e-09
50-150  3.602e-08   2.175e-08
15-150  6.098e-08   3.621e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.45549        (-2.06637      5.21845)
R1^2/D10^2  : 3.07359        (-2.8439      22.2245)
kT2 [keV]   : 44.5199        (-37.6329      -44.893)
R2^2/D10^2  : 2.50285E-03    (-0.00224073   0.0182073)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.68 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     55 degrees of freedom 
# Null hypothesis probability =   3.765696e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.106e-08   6.680e-09
25- 50  1.258e-08   7.160e-09
50-150  4.555e-08   2.683e-08
15-150  6.918e-08   3.613e-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: 1.39129     ( -0.0905103   0.0901039 )
Norm@50keV  : 4.06751E-03    ( -0.000212258   0.00021224 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.21 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     57 degrees of freedom 
# Null hypothesis probability =   3.273176e-01
 
Photon flux (15-150 keV)    in 69.31 sec: 0.494373 ( -0.0272527  0.0273137 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.72898e-06 ( -1.52969e-07  1.53378e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.998031     ( -0.381614   0.350682 )
Epeak [keV] : 135.712      ( -42.3298 514.607 )
Norm@50keV  : 6.27809E-03    ( -0.00197061   0.00315948 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.51 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     56 degrees of freedom 
# Null hypothesis probability =   4.192153e-01
 
Photon flux (15-150 keV)    in 69.31 sec: 0.485433 ( -0.028384  0.028401 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.66841e-06 ( -1.64604e-07  1.63759e-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)  = 1.68e-06
S(50-100 keV) = 2.02e-06

T90 vs. Hardness ratio plot

T90                                   = 303.195999979973 sec.
Hardness ratio (energy fluence ratio) = 1.20238

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.33685
Count Ratio (50-100 keV) / (15-25 keV) = 0.85698

Mask shadow pattern

IMX = 7.157760779786505E-01, IMY = 8.133471637255016E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-217.899400 3.192000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
276.6990  78.9195    2.8  50.2  143.9   4.6984   4.2 ------	UNKNOWN                       
116.0699  18.8787    2.6  52.3   30.1   5.0039   4.4 ------	UNKNOWN                       
258.7231  69.4663    3.0  48.8  157.7   2.6380   3.9 ------	UNKNOWN                       
213.3669  58.4199    2.1  29.5  175.1   1.4488   5.5 ------	UNKNOWN                       
173.9646  -3.6066    2.9  47.3  -53.4   4.2038   4.0 ------	UNKNOWN

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

Time interval of the image:
3.192000 72.500600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
115.0992  45.1548    2.7  39.5   62.5   1.6626   4.2 ------	UNKNOWN                       
146.9164  14.6572    0.4  35.8   -6.5   4.1662  27.1 ------	UNKNOWN                       
155.5977  23.1686    2.5  24.3  -12.2   0.5632   4.7 ------	UNKNOWN                       
234.5180  42.4760    2.2  44.9 -161.5   1.3950   5.3 ------	UNKNOWN                       
225.7346  21.9936    2.1  49.4 -132.3   3.5573   5.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
131.100610 270.700600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5082 -40.4897    4.7  56.1   -9.2   1.2703   2.5    4.0	Vela X-1                      
150.2028  69.4639    3.0  54.9  161.7   3.4914   3.8 ------	UNKNOWN                       
116.7234 -12.1358    2.4  40.2   30.1   1.5178   4.7 ------	UNKNOWN                       
146.9098  14.6597    0.8   0.0  104.4   2.4472  14.4 ------	UNKNOWN                       
152.6830 -23.8168    2.7  38.9  -28.1   0.9695   4.3 ------	UNKNOWN

Plot creation:
Mon Dec 17 21:12:22 EST 2018