batgrbproduct analysis for trigger=1110090
batgrbproduct Analysis for Trigger=1110090
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): Mon Jun 13 15:27:06 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1110090/batgroup_hand_proc
======================================================================
Trigger: 01110090 Segment: 000
BAT Trigger Time: 676663340.48 [s; MET]
Trigger Stop: 676663348.672 [s; MET]
UTC: 2022-06-11T18:01:51.178200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 66.5264936478521 Dec: -37.2893134150936 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.49
Image Trigger?: NO
Rate S/N Ratio: 8.42614977317636 [ if not an image trigger ]
Image S/N Ratio: 7.49
Flight Position: [ source = BAT ]
RA: 66.5264936478521 Dec: -37.2893134150936 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 66.504925058925 Dec: -37.2650458247997 [deg; J2000]
{ 04h 26m 01.2s , -37d 15' 54.2" }
+/- 2.11124995018527 [arcmin] (estimated 90% radius based on SNR)
+/- 0.990827558206799 [arcmin] (formal 1-sigma fit error)
SNR: 10.4590034252702
Angular difference between Flight and Ground position is 1.783389 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 57 +/- 12.369316876853
Measured from: 1.51999998092651
to: 58.5199999809265 [s; relative to TRIGTIME]
T50: 28 +/- 17.2626765016321
Measured from: 7.51999998092651
to: 35.5199999809265 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 9.51999998092651
to: 10.5199999809265 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.519999980926514
to: 61.5199999809265 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.413018 0.489580 0.276293 0.020451
0.065161 0.068169 0.060892 0.057085 [error]
Peak 0.011916 0.028697 0.007186 0.022634
0.008452 0.009133 0.008217 0.007521 [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 1.31e-07 1.92e-07 2.10e-07 4.30e-07 6.66e-07 9.64e-07 erg/cm2
Error 2.89e-08 3.11e-08 5.63e-08 2.27e-07 1.32e-07 2.90e-07 erg/cm2
Peak flux Power-law 1.51e-014.72e-04 1.58e-014.20e-03 1.17e-013.35e-02 1.39e-011.59e+00 4.79e-011.29e-01 5.64e-011.64e+00 ph/cm2/s
Error 1.51e-01 1.03e-02 9.51e-02 1.25e+00 1.38e-01 1.14e+00 ph/cm2/s
Fluence Cutoff-PL 1.26e-07 2.16e-07 1.92e-07 9.02e-08 5.96e-07 6.24e-07 erg/cm2
Error 3.09e-08 4.58e-08 7.95e-08 3.29e-07 1.56e-07 3.57e-07 erg/cm2
Peak flux Cutoff-PL 1.68e-01 1.61e-01 1.08e-01 1.12e-01 4.83e-01 5.50e-01 ph/cm2/s
Error 1.18e-01 7.60e-02 9.02e-02 -------- 1.60e-01 -------- ph/cm2/s
Fluence Band 1.27e-07 2.23e-07 1.78e-07 2.33e-07 6.17e-07 7.63e-07 erg/cm2
Error 3.31e-08 4.31e-08 -------- -------- -------- -------- 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 1.873 0.287 - - 1.19e-03 2.36e-04 58.090 57
CPL 0.979 1.545 44.5 -0.0 4.14e-03 3.62e-02 56.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.993 0.785 - - 2.89e-04 5.64e-04 56.970 57
CPL -2.837 0.000 10000.0 0.0 1.37e-04 0.00e+00 55.720 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: 8.640000 sec.
T50 in the 50-300 keV band: 4.672000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 61.000 0.520 61.520
T90 57.000 1.520 58.520
T50 28.000 7.520 35.520
Peak 1.000 9.520 10.520
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
66.5049 -37.2650 0.0185 31.1 6.5 1.2928 10.5 TRIG_01110090
------------------------------------------
Foreground time interval of the image:
0.520 50.021 (delta_t = 49.501 [sec])
Background time interval of the image:
-239.480 0.520 (delta_t = 240.000 [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 0.520 sec. to 61.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87284 ( -0.277443 0.296794 )
Norm@50keV : 1.18748E-03 ( -0.000238774 0.000232341 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.09 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.348131e-01
Photon flux (15-150 keV) in 61 sec: 0.168484 ( -0.027033 0.0270331 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.65913e-07 ( -1.29688e-07 1.34481e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.520 sec. to 61.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.979142 ( -1.92357 1.16593 )
Epeak [keV] : 44.4953 ( -44.3791 -44.4687 )
Norm@50keV : 4.14431E-03 ( -0.00415655 0.0682053 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.58 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 56 degrees of freedom
# Null hypothesis probability = 4.532638e-01
Photon flux (15-150 keV) in 61 sec: 0.163871 ( -0.027596 0.027699 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.95718e-07 ( -1.47899e-07 1.64128e-07 ) ergs/cm2
Band function
Time interval is from 0.520 sec. to 61.520 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97605 ( -5.47017 -4.97605 )
beta : -2.32832 ( -0.737657 0.439385 )
Epeak [keV] : 26.6659 ( -5.56315 4.52908 )
Norm@50keV : 123.788 ( -19.3538 438.256 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9547 for 55 degrees of freedom
# Null hypothesis probability = 5.703091e-01
Photon flux (15-150 keV) in 61 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.17021e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.16647 (-1.56682 1.99878)
R^2/D10^2 : 0.112476 (-0.0596347 0.118286)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.92 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 57 degrees of freedom
# Null hypothesis probability = 3.368820e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.133e-07 3.404e-08
25- 50 2.477e-07 6.710e-08
50-150 9.992e-08 4.396e-08
15-150 4.609e-07 1.152e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.5944 (-29.9683 73.8143)
Norm : 0.818030 (-0.177935 0.237845)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.288e-07 2.751e-08
25- 50 2.084e-07 4.288e-08
50-150 2.803e-07 1.664e-07
15-150 6.175e-07 2.071e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.96997 (-1.84603 2.08549)
R1^2/D10^2 : 0.259700 (-0.152432 0.459341)
kT2 [keV] : 27.4831 (-13.3477 -27.4854)
R2^2/D10^2 : 1.10689E-03 (-0.00109666 0.00721764)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.315e-07 7.514e-08
25- 50 2.171e-07 1.105e-07
50-150 3.015e-07 1.883e-07
15-150 6.500e-07 3.301e-07
Peak spectrum fit
Power-law model
Time interval is from 9.520 sec. to 10.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.99294 ( -0.647128 0.92305 )
Norm@50keV : 2.88527E-04 ( -0.00028802 0.000839446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.97 using 59 PHA bins.
# Reduced chi-squared = 0.9995 for 57 degrees of freedom
# Null hypothesis probability = 4.760982e-01
Photon flux (15-150 keV) in 1 sec: 0.479174 0.128816 ( -0.128817 0.147645 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.67714e-16 ( -3.74001e-08 2.2367e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.520 sec. to 10.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.83656 ( )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 1.36852E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 0.9950 for 56 degrees of freedom
# Null hypothesis probability = 4.853610e-01
Photon flux (15-150 keV) in 1 sec: 0.483335 0.133548 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4613e-08 ( -1.79079e-08 2.54501e-08 ) ergs/cm2
Band function
Time interval is from 9.520 sec. to 10.520 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.95388 -4.95388 )
beta : -1.30296 ( 3.48846 -0.822496 )
Epeak [keV] : 3215.58 ( -2906.48 983.871 )
Norm@50keV : 1.42374E-05 ( -1.41925e-05 0.000219849 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.72 using 59 PHA bins.
# Reduced chi-squared = 0.9767 for 55 degrees of freedom
# Null hypothesis probability = 5.236674e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.85988 (-2.11898 3.29554)
R^2/D10^2 : 0.965432 (-0.958057 3.28441)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.144e-09 4.352e-09
25- 50 9.404e-09 6.590e-09
50-150 1.448e-09 1.382e-09
15-150 1.800e-08 1.202e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.336 (-199.353 -199.353)
Norm : 1.91011 (-0.865355 0.866376)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.756e-09 3.346e-09
25- 50 9.150e-09 5.970e-09
50-150 2.007e-08 1.321e-08
15-150 3.397e-08 2.365e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 1.38258E-04 (-6.96487e-05 0.00066495)
kT2 [keV] : 6.26512 (-2.04751 2.52972)
R2^2/D10^2 : 1.23210 (-0.978465 5.30866)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.144e-09 5.315e-01
25- 50 9.429e-09 4.161e+00
50-150 1.458e-09 1.098e+02
15-150 1.803e-08 1.145e+02
Plot creation:
Mon Jun 13 16:25:13 EDT 2022