batgrbproduct analysis for trigger=761119
batgrbproduct Analysis for Trigger=761119
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Jul 11 00:06:58 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger761119/GCN5_download_cron
======================================================================
Trigger: 00761119 Segment: 000
BAT Trigger Time: 521340363.968 [s; MET]
Trigger Stop: 521340368.064 [s; MET]
UTC: 2017-07-10T00:45:44.623200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 231.81245248794 Dec: -38.5470762478186 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.88
Image Trigger?: NO
Rate S/N Ratio: 7.87400787401181 [ if not an image trigger ]
Image S/N Ratio: 6.88
Flight Position: [ source = BAT ]
RA: 231.81245248794 Dec: -38.5470762478186 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 231.850988193114 Dec: -38.5226301312209 [deg; J2000]
{ 15h 27m 24.2s , -38d 31' 21.5" }
+/- 2.52878764038514 [arcmin] (estimated 90% radius based on SNR)
+/- 1.34478930818137 [arcmin] (formal 1-sigma fit error)
SNR: 8.08219443224432
Angular difference between Flight and Ground position is 2.328633 arcmin
Partial Coding Fraction: 0.2285156 [ including projection effects ]
Duration
T90: 32.6400000452995 +/- 10.5286443676201
Measured from: 0.560000121593475
to: 33.200000166893 [s; relative to TRIGTIME]
T50: 15.4240000844002 +/- 8.55108318807845
Measured from: 2.96000009775162
to: 18.3840001821518 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.484000027179718
to: 1.48400002717972 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.160000026226044
to: 36.9120000004768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.412103 0.485362 0.316447 0.046156
0.085808 0.085038 0.074792 0.068196 [error]
Peak 0.019400 0.031972 0.046726 0.033901
0.014342 0.013810 0.013660 0.011209 [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 1.51e-07 2.17e-07 2.32e-07 4.59e-07 7.43e-07 1.06e-06 erg/cm2
Error 4.24e-08 4.12e-08 7.45e-08 3.03e-07 1.71e-07 3.79e-07 erg/cm2
Peak flux Power-law 2.28e-01 3.01e-01 2.92e-01 5.05e-01 9.86e-01 1.32e+00 ph/cm2/s
Error 1.67e-01 1.33e-01 9.90e-02 4.11e-01 3.42e-01 4.48e-01 ph/cm2/s
Fluence Cutoff-PL 1.52e-07 2.17e-07 2.31e-07 4.52e-07 7.42e-07 1.05e-06 erg/cm2
Error 3.31e-08 4.75e-08 7.56e-08 4.10e-07 1.80e-07 3.47e-07 erg/cm2
Peak flux Cutoff-PL 2.34e-01 3.04e-01 2.90e-01 4.90e-01 9.91e-01 1.32e+00 ph/cm2/s
Error 1.78e-01 1.33e-01 1.11e-01 5.10e-01 3.44e-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 1.906 0.371 - - 2.20e-03 5.13e-04 46.110 57
CPL 1.922 0.000 937.3 0.0 2.16e-03 0.00e+00 46.140 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.044 0.648 - - 8.54e-03 2.88e-03 45.110 57
CPL 3.211 0.708 321.4 0.0 5.02e-04 0.00e+00 45.040 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: 3.328000 sec.
T50 in the 50-300 keV band: 1.984000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 36.752 0.160 36.912
T90 32.640 0.560 33.200
T50 15.424 2.960 18.384
Peak 1.000 0.484 1.484
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
231.8510 -38.5226 0.0237 35.3 125.7 1.2767 8.1 TRIG_00761119
------------------------------------------
Foreground time interval of the image:
0.160 36.912 (delta_t = 36.752 [sec])
Background time interval of the image:
-239.968 0.160 (delta_t = 240.128 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.160 sec. to 36.912 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90642 ( -0.353993 0.38711 )
Norm@50keV : 2.19941E-03 ( -0.00052586 0.000501073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.11 using 59 PHA bins.
# Reduced chi-squared = 0.8090 for 57 degrees of freedom
# Null hypothesis probability = 8.483614e-01
Photon flux (15-150 keV) in 36.75 sec: 0.316502 ( -0.0601857 0.0602294 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.43159e-07 ( -1.67771e-07 1.73572e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.160 sec. to 36.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92192 ( )
Epeak [keV] : 937.299 ( )
Norm@50keV : 2.15528E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.14 using 59 PHA bins.
# Reduced chi-squared = 0.8240 for 56 degrees of freedom
# Null hypothesis probability = 8.233766e-01
Photon flux (15-150 keV) in 36.75 sec: 0.316487 ( -0.030905 0.060113 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.4217e-07 ( -1.88142e-07 1.72552e-07 ) ergs/cm2
Band function
Time interval is from 0.160 sec. to 36.912 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.18205 ( 9.18205 9.18205 )
beta : -1.90642 ( -0.38711 0.354047 )
Epeak [keV] : 33.6610 ( -33.661 -33.661 )
Norm@50keV : 0.298931 ( -0.0714718 0.0681031 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.11 using 59 PHA bins.
# Reduced chi-squared = 0.8384 for 55 degrees of freedom
# Null hypothesis probability = 7.976776e-01
Photon flux (15-150 keV) in 36.75 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] : 9.41548 (-2.1615 3.38468)
R^2/D10^2 : 0.179936 (-0.12265 0.3145)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.93 using 59 PHA bins.
# Reduced chi-squared = 0.9637 for 57 degrees of freedom
# Null hypothesis probability = 5.530412e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.166e-07 4.484e-08
25- 50 2.656e-07 9.669e-08
50-150 1.161e-07 6.167e-08
15-150 4.984e-07 1.843e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.5617 (-39.6371 -82.5617)
Norm : 1.46130 (-0.375439 0.562631)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.73 using 59 PHA bins.
# Reduced chi-squared = 0.8198 for 57 degrees of freedom
# Null hypothesis probability = 8.323006e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.396e-07 4.344e-08
25- 50 2.316e-07 6.507e-08
50-150 3.338e-07 2.338e-07
15-150 7.050e-07 3.274e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.31103 (-2.09273 2.35016)
R1^2/D10^2 : 0.661855 (-0.463758 2.52155)
kT2 [keV] : 27.1963 (-23.1357 86.8585)
R2^2/D10^2 : 2.58007E-03 (-0.00252004 0.00663532)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.17 using 59 PHA bins.
# Reduced chi-squared = 0.8213 for 55 degrees of freedom
# Null hypothesis probability = 8.251234e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.496e-07 8.484e-08
25- 50 2.220e-07 1.204e-07
50-150 3.879e-07 2.293e-07
15-150 7.594e-07 4.122e-07
Peak spectrum fit
Power-law model
Time interval is from 0.484 sec. to 1.484 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04447 ( -0.680964 0.615396 )
Norm@50keV : 8.54341E-03 ( -0.00295192 0.0028057 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.11 using 59 PHA bins.
# Reduced chi-squared = 0.7915 for 57 degrees of freedom
# Null hypothesis probability = 8.724626e-01
Photon flux (15-150 keV) in 1 sec: 0.986352 ( -0.338659 0.345016 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.09698e-08 ( -3.04052e-08 3.06679e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.484 sec. to 1.484 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.21074 ( -4.62479 -3.20904 )
Epeak [keV] : 321.374 ( )
Norm@50keV : 5.01677E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.04 using 59 PHA bins.
# Reduced chi-squared = 0.8043 for 56 degrees of freedom
# Null hypothesis probability = 8.526257e-01
Photon flux (15-150 keV) in 1 sec: 0.991000 ( -0.347389 0.34001 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.05558e-08 ( -3.00423e-08 3.09502e-08 ) ergs/cm2
Band function
Time interval is from 0.484 sec. to 1.484 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.868483 ( 0.868493 0.868493 )
beta : -1.04448 ( 1.04446 0.680961 )
Epeak [keV] : 46.0867 ( -46.0819 -46.0819 )
Norm@50keV : 1.43393E-02 ( -0.00850062 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.11 using 59 PHA bins.
# Reduced chi-squared = 0.8202 for 55 degrees of freedom
# Null hypothesis probability = 8.267345e-01
Photon flux (15-150 keV) in 1 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] : 27.0913 (-10.2683 22.7908)
R^2/D10^2 : 1.80041E-02 (-0.0179719 0.0609773)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.60 using 59 PHA bins.
# Reduced chi-squared = 0.8350 for 57 degrees of freedom
# Null hypothesis probability = 8.081568e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.196e-09 1.475e-09
25- 50 1.296e-08 8.030e-09
50-150 6.941e-08 4.263e-08
15-150 8.456e-08 5.250e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-106.324 -199.363)
Norm : 4.19697 (-1.39302 1.39302)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.43 using 59 PHA bins.
# Reduced chi-squared = 0.8320 for 57 degrees of freedom
# Null hypothesis probability = 8.130079e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.045e-08 6.780e-09
25- 50 2.010e-08 1.216e-08
50-150 4.409e-08 2.705e-08
15-150 7.465e-08 4.539e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.05111 (-6.04305 13.4549)
R1^2/D10^2 : 1.58277 (-1.56482 -1.58848)
kT2 [keV] : 37.1158 (-30.8559 -37.0911)
R2^2/D10^2 : 6.43079E-03 (-0.00617512 0.0317557)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.37 using 59 PHA bins.
# Reduced chi-squared = 0.8068 for 55 degrees of freedom
# Null hypothesis probability = 8.466563e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.999e-09 5.685e-09
25- 50 1.595e-08 9.190e-09
50-150 7.053e-08 4.211e-08
15-150 9.548e-08 4.986e-08
Plot creation:
Tue Jul 11 00:13:33 EDT 2017