batgrbproduct analysis for trigger=980513
batgrbproduct Analysis for Trigger=980513
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): Fri Jul 3 09:44:25 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger980513/GCN5_download_cron
======================================================================
Trigger: 00980513 Segment: 000
BAT Trigger Time: 615366604.172 [s; MET]
Trigger Stop: 615366604.18 [s; MET]
UTC: 2020-07-02T07:09:38.958720 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 274.470700764515 Dec: -16.1666145541457 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.55
Image Trigger?: NO
Rate S/N Ratio: 21.2367605815953 [ if not an image trigger ]
Image S/N Ratio: 7.55
Flight Position: [ source = BAT ]
RA: 274.470700764515 Dec: -16.1666145541457 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 274.489985151154 Dec: -16.1536926496345 [deg; J2000]
{ 18h 17m 57.6s , -16d 09' 13.3" }
+/- 2.51423289725477 [arcmin] (estimated 90% radius based on SNR)
+/- 0.852281330770418 [arcmin] (formal 1-sigma fit error)
SNR: 8.14911630802382
Angular difference between Flight and Ground position is 1.355064 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.00799989700317383 +/- 0.035777160144337
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
T50: 0.00799989700317383 +/- 0.016
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.00799989700317383 second)
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.006724 0.009241 0.002693 0.000067
0.001391 0.001577 0.000991 0.000381 [error]
Peak 0.006724 0.009241 0.002693 0.000067
0.001391 0.001577 0.000991 0.000381 [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 1.54e-09 2.34e-09 2.66e-09 5.76e-09 8.25e-09 1.23e-08 erg/cm2
Error 4.86e-10 5.70e-10 1.07e-09 4.64e-09 2.54e-09 5.85e-09 erg/cm2
Peak flux Power-law 6.24e+00 5.22e+00 2.97e+00 2.50e+00 1.55e+01 1.69e+01 ph/cm2/s
Error 2.01e+00 1.26e+00 1.16e+00 1.86e+00 3.74e+00 4.31e+00 ph/cm2/s
Fluence Cutoff-PL 1.45e-09 3.11e-09 1.81e-09 1.60e-10 6.52e-09 6.53e-09 erg/cm2
Error 5.33e-10 1.07e-09 1.69e-09 2.05e-09 2.45e-09 5.08e-09 erg/cm2
Peak flux Cutoff-PL 5.73e+00 6.93e+00 2.20e+00 1.07e-01 1.50e+01 1.50e+01 ph/cm2/s
Error 2.20e+00 2.35e+00 1.92e+00 1.32e+00 3.61e+00 3.63e+00 ph/cm2/s
Fluence Band 1.41e-09 3.26e-09 1.93e-09 1.51e-09 7.32e-09 8.17e-09 erg/cm2
Error 5.02e-10 -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 5.76e+00 6.82e+00 2.37e+00 1.56e-01 1.51e+01 1.51e+01 ph/cm2/s
Error 2.19e+00 -------- -------- -------- 3.61e+00 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.815 0.426 - - 1.12e-01 3.38e-02 31.380 57
CPL -0.338 4.809 39.6 22.1 2.56e+00 8.21e+04 29.140 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.815 0.426 - - 1.12e-01 3.38e-02 31.380 57
CPL -0.338 4.809 39.6 22.1 2.56e+00 8.21e+04 29.140 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 0.008 0.000 0.008
T90 0.008 0.000 0.008
T50 0.008 0.000 0.008
Peak 0.008 0.000 0.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.4900 -16.1537 0.0235 3.8 124.6 0.0184 8.1 TRIG_00980513
------------------------------------------
Foreground time interval of the image:
0.000 0.008 (delta_t = 0.008 [sec])
Background time interval of the image:
-68.671 -4.172 (delta_t = 64.499 [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 0.000 sec. to 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81451 ( -0.408096 0.444118 )
Norm@50keV : 0.112093 ( -0.0343972 0.0332713 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.38 using 59 PHA bins.
# Reduced chi-squared = 0.5505 for 57 degrees of freedom
# Null hypothesis probability = 9.976980e-01
Photon flux (15-150 keV) in 0.008 sec: 15.5339 ( -3.74255 3.74446 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.25168e-09 ( -2.4585e-09 2.62437e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.338192 ( -7.07789 2.53918 )
Epeak [keV] : 39.6415 ( -21.6178 22.639 )
Norm@50keV : 2.56145 ( -3.77738 164209 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.14 using 59 PHA bins.
# Reduced chi-squared = 0.5204 for 56 degrees of freedom
# Null hypothesis probability = 9.988619e-01
Photon flux (15-150 keV) in 0.008 sec: 14.9687 ( -3.5941 3.6271 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.52149e-09 ( -1.94646e-09 2.95259e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98951 ( -14.3963 -4.98951 )
beta : -2.89286 ( -2.671 0.889727 )
Epeak [keV] : 31.5540 ( -7.15271 5.51353 )
Norm@50keV : 4544.26 ( -1044.8 15956.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 27.10 using 59 PHA bins.
# Reduced chi-squared = 0.4928 for 55 degrees of freedom
# Null hypothesis probability = 9.994306e-01
Photon flux (15-150 keV) in 0.008 sec: 15.1004 ( -8.1004 -3.701 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.32436e-09 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.60161 (-1.8973 2.40369)
R^2/D10^2 : 9.46406 (-5.52778 11.9176)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.37 using 59 PHA bins.
# Reduced chi-squared = 0.5152 for 57 degrees of freedom
# Null hypothesis probability = 9.991055e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.400e-09 5.732e-10
25- 50 3.283e-09 1.342e-09
50-150 1.521e-09 8.614e-10
15-150 6.204e-09 2.485e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 76.2783 (-38.1894 -76.2792)
Norm : 75.3327 (-22.4663 31.7221)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.32 using 59 PHA bins.
# Reduced chi-squared = 0.5319 for 57 degrees of freedom
# Null hypothesis probability = 9.985807e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.558e-09 5.842e-10
25- 50 2.536e-09 1.255e-09
50-150 3.465e-09 2.916e-09
15-150 7.559e-09 4.419e-09
Double BB
#Fit statistic : Chi-Squared = 27.44 using 59 PHA bins.
# Reduced chi-squared = 0.5146 for 55 degrees of freedom
# Reduced chi-squared = 0.5034 for 55 degrees of freedom
# Reduced chi-squared = 0.5012 for 55 degrees of freedom
# Reduced chi-squared = 0.5000 for 55 degrees of freedom
# Reduced chi-squared = 0.4993 for 55 degrees of freedom
# Reduced chi-squared = 0.4989 for 55 degrees of freedom
# Null hypothesis probability = 9.989318e-01
# Null hypothesis probability = 9.992216e-01
# Null hypothesis probability = 9.992701e-01
# Null hypothesis probability = 9.992958e-01
# Null hypothesis probability = 9.993094e-01
# Null hypothesis probability = 9.993166e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.562e-09 1.177e-09
25- 50 3.213e-09 2.668e-09
50-150 3.270e-09 2.551e-09
15-150 8.046e-09 6.416e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81451 ( -0.408096 0.444118 )
Norm@50keV : 0.112093 ( -0.0343972 0.0332713 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.38 using 59 PHA bins.
# Reduced chi-squared = 0.5505 for 57 degrees of freedom
# Null hypothesis probability = 9.976980e-01
Photon flux (15-150 keV) in 0.008 sec: 15.5339 ( -3.74255 3.74446 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.25168e-09 ( -2.4585e-09 2.62437e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.338192 ( -7.07789 2.53918 )
Epeak [keV] : 39.6415 ( -21.6178 22.6439 )
Norm@50keV : 2.56145 ( -3.77738 164209 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.14 using 59 PHA bins.
# Reduced chi-squared = 0.5204 for 56 degrees of freedom
# Null hypothesis probability = 9.988619e-01
Photon flux (15-150 keV) in 0.008 sec: 14.9687 ( -3.5941 3.6271 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.52149e-09 ( -1.94646e-09 2.95259e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98951 ( -4.99395 -4.98951 )
beta : -2.89286 ( -2.671 0.889727 )
Epeak [keV] : 31.5540 ( -7.15271 5.51353 )
Norm@50keV : 4544.26 ( -1044.8 15956.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 27.10 using 59 PHA bins.
# Reduced chi-squared = 0.4928 for 55 degrees of freedom
# Null hypothesis probability = 9.994306e-01
Photon flux (15-150 keV) in 0.008 sec: 15.1004 ( -8.1004 -3.701 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.32436e-09 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.60161 (-1.8973 2.40369)
R^2/D10^2 : 9.46406 (-5.52778 11.9176)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 29.37 using 59 PHA bins.
# Reduced chi-squared = 0.5152 for 57 degrees of freedom
# Null hypothesis probability = 9.991055e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.400e-09 5.828e-10
25- 50 3.283e-09 1.283e-09
50-150 1.521e-09 8.746e-10
15-150 6.204e-09 2.494e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 76.2783 (-38.1894 -76.2792)
Norm : 75.3327 (-22.4663 31.7221)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.32 using 59 PHA bins.
# Reduced chi-squared = 0.5319 for 57 degrees of freedom
# Null hypothesis probability = 9.985807e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.558e-09 5.862e-10
25- 50 2.536e-09 1.334e-09
50-150 3.465e-09 2.868e-09
15-150 7.559e-09 4.686e-09
Double BB
#Fit statistic : Chi-Squared = 27.44 using 59 PHA bins.
# Reduced chi-squared = 0.5146 for 55 degrees of freedom
# Reduced chi-squared = 0.5034 for 55 degrees of freedom
# Reduced chi-squared = 0.5012 for 55 degrees of freedom
# Reduced chi-squared = 0.5000 for 55 degrees of freedom
# Reduced chi-squared = 0.4993 for 55 degrees of freedom
# Reduced chi-squared = 0.4989 for 55 degrees of freedom
# Null hypothesis probability = 9.989318e-01
# Null hypothesis probability = 9.992216e-01
# Null hypothesis probability = 9.992701e-01
# Null hypothesis probability = 9.992958e-01
# Null hypothesis probability = 9.993094e-01
# Null hypothesis probability = 9.993166e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.562e-09 1.230e-09
25- 50 3.213e-09 2.988e-09
50-150 3.270e-09 2.772e-09
15-150 8.046e-09 5.720e-09
Plot creation:
Fri Jul 3 09:48:49 EDT 2020