batgrbproduct analysis for trigger=982201
batgrbproduct Analysis for Trigger=982201
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 v2.47
Process Start Time (local time): Tue Jul 14 09:00:22 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger982201/GCN5_download_cron
======================================================================
Trigger: 00982201 Segment: 000
BAT Trigger Time: 616333400 [s; MET]
Trigger Stop: 616333464 [s; MET]
UTC: 2020-07-13T11:42:54.723560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 76.9619372814151 Dec: -32.8252812192549 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.86
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.86
Flight Position: [ source = BAT ]
RA: 76.9619372814151 Dec: -32.8252812192549 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 76.9076186718266 Dec: -32.8297405958781 [deg; J2000]
{ 05h 07m 37.8s , -32d 49' 47.1" }
+/- 3.08132384935609 [arcmin] (estimated 90% radius based on SNR)
+/- 1.40807279972746 [arcmin] (formal 1-sigma fit error)
SNR: 6.09427675031273
Angular difference between Flight and Ground position is 2.751696 arcmin
Partial Coding Fraction: 0.4648438 [ including projection effects ]
Duration
T90: 153.799999952316 +/- 109.180575067302
Measured from: -84.691999912262
to: 69.1080000400543 [s; relative to TRIGTIME]
T50: 12.6199998855591 +/- 97.5623493086355
Measured from: 41.6920001506805
to: 54.3120000362396 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 49.9359999895096
to: 50.9359999895096 [s; relative to TRIGTIME]
Total Fluence
Measured from: -132.603999972343
to: 75.4359999895096 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.689140 0.662383 0.372008 -0.025749
0.150918 0.157153 0.143121 0.144777 [error]
Peak 0.031112 0.026391 0.026229 0.019478
0.011937 0.011910 0.010917 0.011005 [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 2.68e-07 3.15e-07 2.68e-07 3.86e-07 9.88e-07 1.24e-06 erg/cm2
Error 8.32e-08 8.11e-08 1.34e-07 3.85e-07 3.03e-07 5.51e-07 erg/cm2
Peak flux Power-law 2.77e-01 2.59e-01 1.68e-01 1.68e-01 7.74e-01 8.72e-01 ph/cm2/s
Error 1.97e-01 1.10e-01 1.29e-01 2.28e-01 3.12e-01 3.44e-01 ph/cm2/s
Fluence Cutoff-PL 2.66e-07 3.18e-07 2.66e-07 2.89e-07 9.79e-07 1.12e-06 erg/cm2
Error 8.71e-08 9.49e-08 1.42e-07 4.42e-07 3.16e-07 5.89e-07 erg/cm2
Peak flux Cutoff-PL 2.77e-01 2.59e-01 1.68e-01 1.67e-01 7.73e-01 8.71e-01 ph/cm2/s
Error 1.97e-01 1.11e-01 9.38e-02 2.43e-01 3.09e-01 3.40e-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 2.236 0.529 - - 5.03e-04 1.83e-04 32.320 57
CPL 1.965 0.000 5.7 0.0 7.16e-04 0.00e+00 32.380 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.627 0.887 - - 5.97e-03 2.61e-03 45.350 57
CPL 4.198 3.319 501.3 0.0 3.94e-04 0.00e+00 44.680 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 208.040 -132.604 75.436
T90 153.800 -84.692 69.108
T50 12.620 41.692 54.312
Peak 1.000 49.936 50.936
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
76.9076 -32.8297 0.0315 43.7 -174.2 1.6241 6.1 TRIG_00982201
------------------------------------------
Foreground time interval of the image:
-11.899 70.701 (delta_t = 82.600 [sec])
Background time interval of the image:
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 -132.604 sec. to 75.436 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23594 ( -0.47318 0.584317 )
Norm@50keV : 5.02588E-04 ( -0.000189055 0.00017734 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.32 using 59 PHA bins.
# Reduced chi-squared = 0.5670 for 57 degrees of freedom
# Null hypothesis probability = 9.965616e-01
Photon flux (15-150 keV) in 208 sec: 8.48094E-02 ( -0.0199525 0.0199535 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.88144e-07 ( -2.93488e-07 3.13084e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -132.604 sec. to 75.436 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96475 ( )
Epeak [keV] : 5.67702 ( )
Norm@50keV : 7.15803E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.38 using 59 PHA bins.
# Reduced chi-squared = 0.5781 for 56 degrees of freedom
# Null hypothesis probability = 9.952226e-01
Photon flux (15-150 keV) in 208 sec: 8.47800E-02 ( -0.0199453 0.019939 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.79324e-07 ( -3.11667e-07 3.20247e-07 ) ergs/cm2
Band function
Time interval is from -132.604 sec. to 75.436 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.46121 ( 2.46121 2.46121 )
beta : -2.23594 ( -0.584092 0.473126 )
Epeak [keV] : 7.97685 ( -7.97685 -7.97685 )
Norm@50keV : 6.83087E-02 ( -0.025706 0.0241023 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.32 using 59 PHA bins.
# Reduced chi-squared = 0.5876 for 55 degrees of freedom
# Null hypothesis probability = 9.937101e-01
Photon flux (15-150 keV) in 208 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] : 8.97407 (-3.00769 3.54751)
R^2/D10^2 : 5.73140E-02 (-0.0404574 0.226965)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.42 using 59 PHA bins.
# Reduced chi-squared = 0.6740 for 57 degrees of freedom
# Null hypothesis probability = 9.720471e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.866e-07 1.049e-07
25- 50 3.949e-07 1.863e-07
50-150 1.493e-07 9.662e-08
15-150 7.309e-07 3.641e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 48.2811 (-24.2576 69.0533)
Norm : 0.486810 (-0.174021 0.341548)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.95 using 59 PHA bins.
# Reduced chi-squared = 0.5781 for 57 degrees of freedom
# Null hypothesis probability = 9.955526e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.455e-07 9.887e-08
25- 50 3.482e-07 1.374e-07
50-150 3.270e-07 2.145e-07
15-150 9.207e-07 4.351e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.44188 (-1.64916 2.54746)
R1^2/D10^2 : 2.39388 (-2.19061 139.552)
kT2 [keV] : 14.3153 (-4.96438 12.5475)
R2^2/D10^2 : 7.43616E-03 (-0.00681315 0.0341242)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.38 using 59 PHA bins.
# Reduced chi-squared = 0.5705 for 55 degrees of freedom
# Null hypothesis probability = 9.956726e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.750e-07 1.471e-07
25- 50 3.018e-07 1.659e-07
50-150 3.467e-07 2.268e-07
15-150 9.235e-07 4.949e-07
Peak spectrum fit
Power-law model
Time interval is from 49.936 sec. to 50.936 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62680 ( -0.822096 0.951279 )
Norm@50keV : 5.96869E-03 ( -0.00277534 0.00244283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.35 using 59 PHA bins.
# Reduced chi-squared = 0.7956 for 57 degrees of freedom
# Null hypothesis probability = 8.670378e-01
Photon flux (15-150 keV) in 1 sec: 0.773526 ( -0.311819 0.312821 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.56424e-08 ( -2.49662e-08 2.55216e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 49.936 sec. to 50.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.19796 ( -4.22184 2.41657 )
Epeak [keV] : 501.297 ( )
Norm@50keV : 3.94499E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.68 using 59 PHA bins.
# Reduced chi-squared = 0.7979 for 56 degrees of freedom
# Null hypothesis probability = 8.615687e-01
Photon flux (15-150 keV) in 1 sec: 0.773022 ( -0.304235 0.312818 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.53216e-08 ( -2.46492e-08 2.55211e-08 ) ergs/cm2
Band function
Time interval is from 49.936 sec. to 50.936 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.64755 ( -0.354952 1.74781 )
beta : -9.36906 ( 9.36906 9.36906 )
Epeak [keV] : 9999.36 ( -9980.52 -9999.36 )
Norm@50keV : 5.94772E-03 ( -0.00256456 0.0531213 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.35 using 59 PHA bins.
# Reduced chi-squared = 0.8246 for 55 degrees of freedom
# Null hypothesis probability = 8.200261e-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] : 19.1346 (-12.8959 22.0205)
R^2/D10^2 : 3.49514E-02 (-0.0344281 1.82091)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.14 using 59 PHA bins.
# Reduced chi-squared = 0.8621 for 57 degrees of freedom
# Null hypothesis probability = 7.610007e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.509e-09 1.759e-09
25- 50 1.213e-08 7.725e-09
50-150 3.268e-08 2.185e-08
15-150 4.731e-08 3.113e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-199.362 -199.362)
Norm : 3.08758 (-1.21767 2.18144)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8019 for 57 degrees of freedom
# Null hypothesis probability = 8.584158e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.688e-09 4.991e-09
25- 50 1.479e-08 9.395e-09
50-150 3.244e-08 2.101e-08
15-150 5.491e-08 3.399e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.36977 (-3.73741 5.01729)
R1^2/D10^2 : 7.38141 (-7.14632 -7.37878)
kT2 [keV] : 29.8098 (-26.8595 -29.8118)
R2^2/D10^2 : 7.08443E-03 (-0.00699114 0.0650429)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.10 using 59 PHA bins.
# Reduced chi-squared = 0.8018 for 55 degrees of freedom
# Null hypothesis probability = 8.536840e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.113e-08 6.375e-09
25- 50 1.076e-08 5.805e-09
50-150 3.837e-08 2.620e-08
15-150 6.026e-08 3.236e-08
Plot creation:
Tue Jul 14 09:05:15 EDT 2020