batgrbproduct analysis for trigger=972614
batgrbproduct Analysis for Trigger=972614
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): Sun May 17 21:38:34 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger972614/GCN5_download_cron
======================================================================
Trigger: 00972614 Segment: 000
BAT Trigger Time: 611334233.648 [s; MET]
Trigger Stop: 611334233.664 [s; MET]
UTC: 2020-05-16T15:03:28.697140 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 274.550208088544 Dec: -16.1926044315806 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.09
Image Trigger?: NO
Rate S/N Ratio: 11.4455231422596 [ if not an image trigger ]
Image S/N Ratio: 7.09
Flight Position: [ source = BAT ]
RA: 274.550208088544 Dec: -16.1926044315806 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 274.489700039187 Dec: -16.1642398878541 [deg; J2000]
{ 18h 17m 57.5s , -16d 09' 51.3" }
+/- 3.30456449503448 [arcmin] (estimated 90% radius based on SNR)
+/- 1.9412374517012 [arcmin] (formal 1-sigma fit error)
SNR: 5.51476003232504
Angular difference between Flight and Ground position is 3.879887 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 0.0160000324249268 +/-
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
T50: 0.0160000324249268 +/-
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0160000324249268 second)
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.006670 0.004040 0.000579 0.000346
0.001363 0.001191 0.000683 0.000558 [error]
Peak 0.006670 0.004040 0.000579 0.000346
0.001363 0.001191 0.000683 0.000558 [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 1.01e-09 3.61e-10 7.36e-11 1.78e-11 1.46e-09 1.46e-09 erg/cm2
Error 4.56e-10 1.69e-10 5.57e-11 2.48e-11 6.08e-10 6.10e-10 erg/cm2
Peak flux Power-law 2.16e+00 4.42e-01 4.51e-02 5.05e-03 2.65e+00 2.65e+00 ph/cm2/s
Error 9.84e-01 2.03e-01 3.34e-02 6.68e-03 1.14e+00 1.14e+00 ph/cm2/s
Fluence Cutoff-PL 1.28e-09 7.30e-10 4.24e-11 6.56e-14 2.06e-09 2.06e-09 erg/cm2
Error 5.43e-10 6.08e-10 4.91e-11 8.75e-12 6.42e-10 6.42e-10 erg/cm2
Peak flux Cutoff-PL 2.64e+00 9.05e-01 2.90e-02 2.39e-05 3.58e+00 3.58e+00 ph/cm2/s
Error 1.14e+00 7.48e-01 3.20e-02 2.54e-03 1.45e+00 1.45e+00 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 4.293 0.760 - - 3.31e-03 2.09e-03 57.940 57
CPL 1.000 0.000 50.0 0.0 5.65e-03 0.00e+00 69.570 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.293 0.760 - - 3.31e-03 2.09e-03 57.940 57
CPL 1.000 0.000 50.0 0.0 5.65e-03 0.00e+00 69.570 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 0.016 0.000 0.016
T90 0.016 0.000 0.016
T50 0.016 0.000 0.016
Peak 0.016 0.000 0.016
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.4897 -16.1642 0.0348 12.7 59.1 0.0109 5.5 TRIG_00972614
------------------------------------------
Foreground time interval of the image:
0.000 0.016 (delta_t = 0.016 [sec])
Background time interval of the image:
-239.648 -198.448 (delta_t = 41.200 [sec])
-197.648 -1.648 (delta_t = 196.000 [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 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.29291 ( -0.644427 0.875103 )
Norm@50keV : 3.31043E-03 ( -0.00208508 0.00209223 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.403954e-01
Photon flux (15-150 keV) in 0.016 sec: 2.64764 ( -1.14538 1.13783 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45518e-09 ( -6.07971e-10 6.07626e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.64974E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.57 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 56 degrees of freedom
# Null hypothesis probability = 1.051577e-01
Photon flux (15-150 keV) in 0.016 sec: 3.57698 ( -1.44974 1.4437 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05651e-09 ( -4.33728e-10 8.49616e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.33762 ( 8.33762 8.33762 )
beta : -4.29301 ( -0.873759 0.644589 )
Epeak [keV] : 2.25278 ( -2.25278 -2.25278 )
Norm@50keV : 0.449893 ( -0.283114 0.284366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Null hypothesis probability = 3.673741e-01
Photon flux (15-150 keV) in 0.016 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] : 4.99327 (-1.73345 0.987097)
R^2/D10^2 : 32.7632 (-32.7695 239.997)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.61 using 59 PHA bins.
# Reduced chi-squared = 0.9756 for 57 degrees of freedom
# Null hypothesis probability = 5.274546e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.268e-09 8.408e-10
25- 50 8.254e-10 5.510e-10
50-150 3.334e-11 3.403e-11
15-150 2.127e-09 1.426e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.8638 (-3.52727 3.46631)
Norm : 100.391 (-56.092 130.413)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.62 using 59 PHA bins.
# Reduced chi-squared = 0.9758 for 57 degrees of freedom
# Null hypothesis probability = 5.269069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.242e-09 6.927e-10
25- 50 5.954e-10 3.238e-10
50-150 5.081e-11 4.408e-11
15-150 1.888e-09 9.678e-10
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.20205 (-1.25585 1.36507)
R1^2/D10^2 : 73.0841 (-57.1583 454.993)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 6.31993E-05 (-6.32137e-05 68.7661)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.48 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9724 for 55 degrees of freedom
# Reduced chi-squared = 0.9722 for 55 degrees of freedom
# Null hypothesis probability = 5.327312e-01
# Null hypothesis probability = 5.332094e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.346e-09 8.208e-10
25- 50 5.675e-10 3.883e-10
50-150 2.590e-10 1.288e-11
15-150 2.173e-09 1.241e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.29291 ( -0.644427 0.875103 )
Norm@50keV : 3.31043E-03 ( -0.00208508 0.00209223 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.403954e-01
Photon flux (15-150 keV) in 0.016 sec: 2.64764 ( -1.14538 1.13783 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45518e-09 ( -6.07971e-10 6.07626e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.64974E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.57 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 56 degrees of freedom
# Null hypothesis probability = 1.051577e-01
Photon flux (15-150 keV) in 0.016 sec: 3.57698 ( -1.44974 1.4437 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05651e-09 ( -4.33728e-10 8.49616e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.33762 ( 8.33762 8.33762 )
beta : -4.29301 ( -0.873759 0.644589 )
Epeak [keV] : 2.25278 ( -2.25278 -2.25278 )
Norm@50keV : 0.449893 ( -0.283114 0.284366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Null hypothesis probability = 3.673741e-01
Photon flux (15-150 keV) in 0.016 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] : 4.99327 (-1.73345 0.987097)
R^2/D10^2 : 32.7632 (-32.7695 239.997)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.61 using 59 PHA bins.
# Reduced chi-squared = 0.9756 for 57 degrees of freedom
# Null hypothesis probability = 5.274546e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.268e-09 8.280e-10
25- 50 8.254e-10 5.649e-10
50-150 3.334e-11 3.341e-11
15-150 2.127e-09 1.394e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.8638 (-3.52727 3.46631)
Norm : 100.391 (-56.092 130.413)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.62 using 59 PHA bins.
# Reduced chi-squared = 0.9758 for 57 degrees of freedom
# Null hypothesis probability = 5.269069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.242e-09 5.803e-10
25- 50 5.954e-10 3.198e-10
50-150 5.081e-11 4.334e-11
15-150 1.888e-09 9.350e-10
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.20205 (-1.25585 1.36507)
R1^2/D10^2 : 73.0841 (-57.1583 454.993)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 6.31993E-05 (-6.32137e-05 68.7661)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.48 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9724 for 55 degrees of freedom
# Reduced chi-squared = 0.9722 for 55 degrees of freedom
# Null hypothesis probability = 5.327312e-01
# Null hypothesis probability = 5.332094e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.346e-09 8.480e-10
25- 50 5.675e-10 3.713e-10
50-150 2.590e-10 1.255e-11
15-150 2.173e-09 1.237e-09
Plot creation:
Sun May 17 21:43:25 EDT 2020