batgrbproduct analysis for trigger=1074326
batgrbproduct Analysis for Trigger=1074326
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): Wed Sep 22 20:58:41 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1074326/GCN5_download_cron
======================================================================
Trigger: 01074326 Segment: 000
BAT Trigger Time: 653939024 [s; MET]
Trigger Stop: 653939344 [s; MET]
UTC: 2021-09-21T17:43:16.231860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 307.803427259369 Dec: 37.6101682851044 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.46
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.46
Flight Position: [ source = BAT ]
RA: 307.803427259369 Dec: 37.6101682851044 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 307.568717967267 Dec: 37.5747316412267 [deg; J2000]
{ 20h 30m 16.5s , +37d 34' 29.0" }
+/- 4.92300435802759 [arcmin] (estimated 90% radius based on SNR)
+/- 3.23644389345756 [arcmin] (formal 1-sigma fit error)
SNR: 3.12045601571993
Angular difference between Flight and Ground position is 11.359354 arcmin
Partial Coding Fraction: 0.2929688 [ including projection effects ]
Duration
T90: 545.93599998951 +/- 105.198484241555
Measured from: -22.4719998836517
to: 523.464000105858 [s; relative to TRIGTIME]
T50: 316.879999995232 +/- 117.025284353855
Measured from: 82.200000166893
to: 399.080000162125 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 246.572000026703
to: 247.572000026703 [s; relative to TRIGTIME]
Total Fluence
Measured from: -64.7280000448227
to: 536.567999958992 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.458203 3.385605 1.207041 -0.323793
0.343942 0.350227 0.298571 0.257048 [error]
Peak 0.040347 0.044352 0.027607 0.001530
0.014612 0.014157 0.012727 0.010915 [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 2.37e-06 1.73e-06 8.35e-07 5.71e-07 5.20e-06 5.50e-06 erg/cm2
Error 2.62e-07 2.09e-07 2.18e-07 2.70e-07 5.63e-07 6.82e-07 erg/cm2
Peak flux Power-law 5.58e-01 3.27e-01 1.22e-01 6.01e-02 1.04e+00 1.07e+00 ph/cm2/s
Error 2.00e-01 1.31e-01 8.74e-02 8.56e-02 3.83e-01 3.95e-01 ph/cm2/s
Fluence Cutoff-PL 2.35e-06 1.80e-06 6.64e-07 1.33e-07 4.91e-06 4.94e-06 erg/cm2
Error 2.71e-07 2.39e-07 4.94e-07 4.93e-07 6.48e-07 8.30e-07 erg/cm2
Peak flux Cutoff-PL 4.90e-01 3.85e-01 1.27e-01 1.72e-02 1.02e+00 1.02e+00 ph/cm2/s
Error 3.96e-01 1.79e-01 -------- 7.61e-02 3.84e-01 3.91e-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 3.049 0.242 - - 7.09e-04 1.38e-04 66.680 57
CPL 1.981 0.137 0.6 7.0 3.84e-03 0.00e+00 65.520 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.425 0.809 - - 5.52e-03 3.13e-03 48.080 57
CPL 1.116 3.012 29.0 0.0 3.10e-02 0.00e+00 47.420 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 601.296 -64.728 536.568
T90 545.936 -22.472 523.464
T50 316.880 82.200 399.080
Peak 1.000 246.572 247.572
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
307.5687 +37.5747 0.0622 43.1 164.3 3.9357 3.1 TRIG_01074326
------------------------------------------
Foreground time interval of the image:
-64.728 112.950 (delta_t = 177.678 [sec])
114.000 180.860 (delta_t = 66.860 [sec])
181.000 196.460 (delta_t = 15.460 [sec])
197.000 256.370 (delta_t = 59.370 [sec])
257.000 277.370 (delta_t = 20.370 [sec])
278.000 499.570 (delta_t = 221.570 [sec])
501.000 536.568 (delta_t = 35.568 [sec])
Background time interval of the image:
-239.000 -185.240 (delta_t = 53.760 [sec])
-184.000 -158.610 (delta_t = 25.390 [sec])
-158.000 -64.728 (delta_t = 93.272 [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
Multiple GTIs in the spectrum
tstart tstop
-64.728000 112.950000
114.000000 180.860000
181.000000 196.460000
197.000000 256.370000
257.000000 277.370000
278.000000 499.570000
501.000000 536.568000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.04907 ( -0.232002 0.251965 )
Norm@50keV : 7.08745E-04 ( -0.000135416 0.000140134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.68 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.784023e-01
Photon flux (15-150 keV) in 596.9 sec: 0.202033 ( -0.0185472 0.0185503 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.20106e-06 ( -5.54797e-07 5.70583e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-64.728000 112.950000
114.000000 180.860000
181.000000 196.460000
197.000000 256.370000
257.000000 277.370000
278.000000 499.570000
501.000000 536.568000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98051 ( -0.266858 0.00643604 )
Epeak [keV] : 0.554521 ( -0.16863 13.8402 )
Norm@50keV : 3.83627E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.52 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 56 degrees of freedom
# Null hypothesis probability = 1.800051e-01
Photon flux (15-150 keV) in 596.9 sec: 0.198600 ( -0.018991 0.019033 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.91241e-06 ( -6.21003e-07 6.74002e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-64.728000 112.950000
114.000000 180.860000
181.000000 196.460000
197.000000 256.370000
257.000000 277.370000
278.000000 499.570000
501.000000 536.568000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.18384 ( -0.117745 0.333838 )
beta : -3.42599 ( 3.27463 0.354675 )
Epeak [keV] : 18.4990 ( -0.773995 7.18663 )
Norm@50keV : 486.814 ( -487.122 298.637 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.934480e-01
Photon flux (15-150 keV) in 596.9 sec: 0.202063 ( 6.79794 -0.019744 ) 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] : 5.03671 (-0.500814 0.583679)
R^2/D10^2 : 1.58276 (-0.650447 1.0831)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.19 using 59 PHA bins.
# Reduced chi-squared = 1.354 for 57 degrees of freedom
# Null hypothesis probability = 3.869504e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.366e-06 3.426e-07
25- 50 1.573e-06 2.984e-07
50-150 6.626e-08 3.161e-08
15-150 4.005e-06 5.584e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.7319 (-3.41833 4.4903)
Norm : 2.78626 (-0.717893 1.0484)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.312e-06 3.029e-07
25- 50 1.836e-06 2.608e-07
50-150 4.458e-07 1.924e-07
15-150 4.594e-06 5.724e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.08177 (-0.554489 0.588272)
R1^2/D10^2 : 3.76337 (-1.77563 3.81945)
kT2 [keV] : 13.9232 (-3.845 5.82553)
R2^2/D10^2 : 8.59620E-03 (-0.00674347 0.0284035)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.462e-06 7.178e-07
25- 50 1.638e-06 5.602e-07
50-150 1.002e-06 6.252e-07
15-150 5.102e-06 1.735e-06
Peak spectrum fit
Power-law model
Time interval is from 246.572 sec. to 247.572 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42545 ( -0.649037 0.969758 )
Norm@50keV : 5.52440E-03 ( -0.00321911 0.00303733 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.08 using 59 PHA bins.
# Reduced chi-squared = 0.8435 for 57 degrees of freedom
# Null hypothesis probability = 7.939408e-01
Photon flux (15-150 keV) in 1 sec: 1.03758 ( -0.382699 0.382701 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.42084e-08 ( -2.34262e-08 2.51408e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 246.572 sec. to 247.572 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11631 ( -5.0149 1.00878 )
Epeak [keV] : 29.0203 ( )
Norm@50keV : 3.10459E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.42 using 59 PHA bins.
# Reduced chi-squared = 0.8467 for 56 degrees of freedom
# Null hypothesis probability = 7.860122e-01
Photon flux (15-150 keV) in 1 sec: 1.01580 ( -0.382975 0.38519 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.26148e-08 ( -2.21404e-08 2.49402e-08 ) ergs/cm2
Band function
Time interval is from 246.572 sec. to 247.572 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.13889 ( -3.02564 1.72156 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 28.6896 ( -19.3193 -28.6984 )
Norm@50keV : 3.02508E-02 ( -0.030224 33.423 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.42 using 59 PHA bins.
# Reduced chi-squared = 0.8621 for 55 degrees of freedom
# Null hypothesis probability = 7.563905e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.27011e-08 ( -5.26941e-08 -2.22074e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.39403 (-3.73782 4.71284)
R^2/D10^2 : 0.619616 (-0.618099 3.96961)
(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 1.087e-08 6.780e-09
25- 50 2.467e-08 1.604e-08
50-150 1.071e-08 8.220e-09
15-150 4.624e-08 2.888e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.1918 (-24.1347 72.1077)
Norm : 6.70273 (-3.26367 8.29749)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.554e-08 9.867e-09
25- 50 2.070e-08 1.274e-08
50-150 1.653e-08 1.293e-08
15-150 5.278e-08 3.531e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.91932 (-2.51782 11.6765)
R1^2/D10^2 : 1046.09 (-1043.72 -1043.72)
kT2 [keV] : 11.0880 (-4.34553 -11.0926)
R2^2/D10^2 : 0.295175 (-0.294639 1.79492)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.523e-08 8.385e-09
25- 50 2.102e-08 1.289e-08
50-150 1.624e-08 1.273e-08
15-150 5.250e-08 2.965e-08
Plot creation:
Wed Sep 22 21:05:28 EDT 2021