batgrbproduct analysis for trigger=1000613
batgrbproduct Analysis for Trigger=1000613
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 v2.48
Process Start Time (local time): Sun Oct 18 11:48:32 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1000613/GCN5_download_cron
======================================================================
Trigger: 01000613 Segment: 000
BAT Trigger Time: 624620817.088 [s; MET]
Trigger Stop: 624620819.136 [s; MET]
UTC: 2020-10-17T09:46:31.267800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 36.6334750470493 Dec: 66.6727003365269 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.33
Image Trigger?: NO
Rate S/N Ratio: 13.9283882771841 [ if not an image trigger ]
Image S/N Ratio: 7.33
Flight Position: [ source = BAT ]
RA: 36.6334750470493 Dec: 66.6727003365269 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 36.5871482315899 Dec: 66.6627050147157 [deg; J2000]
{ 02h 26m 20.9s , +66d 39' 45.7" }
+/- 2.25725385023739 [arcmin] (estimated 90% radius based on SNR)
+/- 1.1356591352511 [arcmin] (formal 1-sigma fit error)
SNR: 9.5061249690502
Angular difference between Flight and Ground position is 1.253653 arcmin
Partial Coding Fraction: 0.3789062 [ including projection effects ]
Duration
T90: 22.0800000429153 +/- 6.25242352115145
Measured from: -2.28799998760223
to: 19.7920000553131 [s; relative to TRIGTIME]
T50: 9.4559999704361 +/- 5.01760094812224
Measured from: -0.431999921798706
to: 9.02400004863739 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.867999911308289
to: 1.86799991130829 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.76800000667572
to: 23.8719999790192 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.314384 0.494212 0.400753 0.147680
0.068734 0.070899 0.061047 0.052233 [error]
Peak 0.048552 0.086511 0.047772 0.019203
0.014629 0.015197 0.013324 0.011177 [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 1.18e-07 2.20e-07 3.15e-07 9.53e-07 8.96e-07 1.61e-06 erg/cm2
Error 3.02e-08 3.49e-08 5.80e-08 3.77e-07 1.44e-07 4.19e-07 erg/cm2
Peak flux Power-law 6.45e-01 5.89e-01 3.71e-01 3.59e-01 1.75e+00 1.96e+00 ph/cm2/s
Error 2.14e-01 1.29e-01 1.04e-01 1.96e-01 3.80e-01 4.20e-01 ph/cm2/s
Fluence Cutoff-PL 1.08e-07 2.34e-07 3.27e-07 4.28e-07 8.63e-07 1.10e-06 erg/cm2
Error 3.53e-08 4.43e-08 6.52e-08 4.80e-07 1.58e-07 6.06e-07 erg/cm2
Peak flux Cutoff-PL 5.23e-01 6.88e-01 3.93e-01 8.46e-02 1.67e+00 1.69e+00 ph/cm2/s
Error 2.68e-01 1.89e-01 1.34e-01 1.71e-01 4.02e-01 4.64e-01 ph/cm2/s
Fluence Band 1.01e-07 2.43e-07 3.17e-07 6.46e-07 8.61e-07 1.32e-06 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 1.481 0.249 - - 3.54e-03 5.26e-04 40.460 0
CPL 0.904 1.039 94.9 -28.7 6.95e-03 1.41e-02 39.530 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.665 0.351 - - 1.34e-02 3.01e-03 61.380 0
CPL 0.178 2.510 56.3 -22.6 8.45e-02 2.52e+00 59.520 0
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: 8.832000 sec.
T50 in the 50-300 keV band: 2.624000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 26.640 -2.768 23.872
T90 22.080 -2.288 19.792
T50 9.456 -0.432 9.024
Peak 1.000 0.868 1.868
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
36.5871 +66.6627 0.0201 41.9 170.3 1.2558 9.5 TRIG_01000613
------------------------------------------
Foreground time interval of the image:
-2.768 21.713 (delta_t = 24.481 [sec])
Background time interval of the image:
-239.088 -2.768 (delta_t = 236.320 [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 -2.768 sec. to 23.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48139 ( -0.249256 0.248654 )
Norm@50keV : 3.53523E-03 ( -0.000526881 0.000525412 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 40.46 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.52e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 26.64 sec: 0.439163 ( -0.0673004 0.0675484 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.96215e-07 ( -1.42882e-07 1.44139e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.768 sec. to 23.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.903521 ( -1.30985 0.769013 )
Epeak [keV] : 94.8971 ( -37.5922 -94.8981 )
Norm@50keV : 6.95225E-03 ( -0.00383229 0.0244526 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 39.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.53e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 26.64 sec: 0.429942 ( -0.069615 0.069513 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.62563e-07 ( -1.58481e-07 1.56859e-07 ) ergs/cm2
Band function
Time interval is from -2.768 sec. to 23.872 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.43027 ( -4.43027 -4.43027 )
beta : -1.61747 ( -0.325432 0.293767 )
Epeak [keV] : 27.7415 ( -27.7415 8.76163 )
Norm@50keV : 79.3557 ( -11.6113 1.75078e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 26.64 sec: 1.02627 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.60869e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.8414 (-2.36991 2.99654)
R^2/D10^2 : 5.29771E-02 (-0.0256518 0.0459263)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.57 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.37e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.519e-08 1.813e-08
25- 50 2.565e-07 5.697e-08
50-150 3.827e-07 1.164e-07
15-150 7.044e-07 1.614e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-85.5496 -199.363)
Norm : 1.81641 (-0.267068 0.267157)
------------------------------------------------------------
#Fit statistic : Chi-Squared 39.97 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.58e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.205e-07 6.876e-08
25- 50 2.318e-07 1.300e-07
50-150 5.083e-07 2.846e-07
15-150 8.606e-07 4.854e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.2935 (-5.40354 3.73408)
R1^2/D10^2 : 0.148084 (-0.0871438 1.12194)
kT2 [keV] : 45.0281 (-48.1934 -48.1939)
R2^2/D10^2 : 8.11360E-04 (-0.000640056 0.0123952)
------------------------------------------------------------
#Fit statistic : Chi-Squared 38.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.51e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.110e-08 5.245e-08
25- 50 2.589e-07 1.427e-07
50-150 5.267e-07 2.627e-07
15-150 8.767e-07 4.159e-07
Peak spectrum fit
Power-law model
Time interval is from 0.868 sec. to 1.868 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66482 ( -0.343568 0.35905 )
Norm@50keV : 1.33702E-02 ( -0.00304077 0.00298848 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.38 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.22e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.75441 ( -0.379727 0.380679 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24169e-07 ( -2.918e-08 2.96923e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.868 sec. to 1.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.177811 ( -3.30368 1.71732 )
Epeak [keV] : 56.2604 ( -10.8554 -56.0533 )
Norm@50keV : 8.44561E-02 ( -0.0873427 4.95254 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.49e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.67376 ( -0.40567 0.39857 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11722e-07 ( -3.10844e-08 3.3965e-08 ) ergs/cm2
Band function
Time interval is from 0.868 sec. to 1.868 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.610146 ( -0.924091 -0.924091 )
beta : -2.52149 ( 2.58377 1.03088 )
Epeak [keV] : 48.6028 ( -47.8882 42.8965 )
Norm@50keV : 0.249050 ( -0.249573 152.783 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15465e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.7389 (-2.45475 3.15936)
R^2/D10^2 : 0.369067 (-0.208299 0.438864)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.49 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.51e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.270e-08 4.798e-09
25- 50 4.279e-08 1.346e-08
50-150 4.338e-08 1.938e-08
15-150 9.887e-08 3.670e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 137.701 (-73.0449 -135.093)
Norm : 7.36807 (-1.7314 2.4854)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.41 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.54e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.905e-08 1.101e-08
25- 50 3.486e-08 1.962e-08
50-150 6.633e-08 4.182e-08
15-150 1.202e-07 7.245e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 1.09723E-04 (-0.000109726 -0.000109726)
kT2 [keV] : 11.3189 (-2.06226 3.20321)
R2^2/D10^2 : 0.522904 (-0.3089 0.154253)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.50e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.571e-08 8.346e-09
25- 50 4.015e-08 2.261e-08
50-150 4.673e-08 2.929e-08
15-150 1.026e-07 5.324e-08
Plot creation:
Sun Oct 18 11:52:32 EDT 2020