batgrbproduct analysis for trigger=1161390
batgrbproduct Analysis for Trigger=1161390
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 Mar 26 06:22:18 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1161390/GCN5_download_cron
======================================================================
Trigger: 01161390 Segment: 000
BAT Trigger Time: 701406966.848 [s; MET]
Trigger Stop: 701406967.872 [s; MET]
UTC: 2023-03-25T03:15:35.863840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 296.820236138275 Dec: -46.0941325282463 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.62
Image Trigger?: NO
Rate S/N Ratio: 29.086079144498 [ if not an image trigger ]
Image S/N Ratio: 11.62
Flight Position: [ source = BAT ]
RA: 296.820236138275 Dec: -46.0941325282463 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 296.853678866104 Dec: -46.0665999878953 [deg; J2000]
{ 19h 47m 24.9s , -46d 03' 59.8" }
+/- 1.5459815316665 [arcmin] (estimated 90% radius based on SNR)
+/- 0.574569055273165 [arcmin] (formal 1-sigma fit error)
SNR: 16.3239975406616
Angular difference between Flight and Ground position is 2.160137 arcmin
Partial Coding Fraction: 0.4882812 [ including projection effects ]
Duration
T90: 38.0480000972748 +/- 11.56039866151
Measured from: -7.22399997711182
to: 30.824000120163 [s; relative to TRIGTIME]
T50: 5.91999995708466 +/- 6.53474660003339
Measured from: -0.1839998960495
to: 5.73600006103516 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0680000782012939
to: 0.931999921798706 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.55200004577637
to: 41.7039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.735364 0.908069 0.568816 0.105001
0.076034 0.077689 0.067591 0.058149 [error]
Peak 0.100096 0.147022 0.144820 0.031954
0.013840 0.015026 0.014571 0.009693 [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 2.46e-07 3.72e-07 4.22e-07 9.11e-07 1.31e-06 1.95e-06 erg/cm2
Error 3.68e-08 3.65e-08 6.56e-08 2.89e-07 1.52e-07 3.52e-07 erg/cm2
Peak flux Power-law 9.60e-01 1.08e+00 8.62e-01 1.15e+00 3.32e+00 4.05e+00 ph/cm2/s
Error 1.82e-01 1.28e-01 1.09e-01 2.96e-01 3.62e-01 4.47e-01 ph/cm2/s
Fluence Cutoff-PL 2.33e-07 3.91e-07 4.26e-07 4.72e-07 1.27e-06 1.52e-06 erg/cm2
Error 4.20e-08 4.62e-08 7.01e-08 5.33e-07 1.66e-07 5.13e-07 erg/cm2
Peak flux Cutoff-PL 8.68e-01 1.12e+00 9.14e-01 7.44e-01 3.28e+00 3.64e+00 ph/cm2/s
Error 2.20e-01 1.46e-01 1.35e-01 4.63e-01 3.69e-01 5.64e-01 ph/cm2/s
Fluence Band 2.28e-07 3.92e-07 4.26e-07 4.31e-07 1.26e-06 1.48e-06 erg/cm2
Error 3.92e-08 -------- -------- -------- 1.64e-07 -------- 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 1.819 0.182 - - 2.84e-03 3.22e-04 44.430 57
CPL 1.401 0.703 66.0 -22.8 4.77e-03 4.59e-03 43.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.319 0.176 - - 2.77e-02 2.97e-03 56.720 57
CPL 0.862 0.664 136.9 -40.5 4.56e-02 3.89e-02 55.420 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: 1.920000 sec.
T50 in the 50-300 keV band: 0.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 50.256 -8.552 41.704
T90 38.048 -7.224 30.824
T50 5.920 -0.184 5.736
Peak 1.000 -0.068 0.932
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
296.8537 -46.0666 0.0118 30.2 108.7 1.8372 16.3 TRIG_01161390
------------------------------------------
Foreground time interval of the image:
-8.552 14.453 (delta_t = 23.005 [sec])
Background time interval of the image:
-239.848 -193.328 (delta_t = 46.520 [sec])
-191.848 -155.908 (delta_t = 35.940 [sec])
-154.848 -8.552 (delta_t = 146.296 [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 -8.552 sec. to 41.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81857 ( -0.177941 0.185135 )
Norm@50keV : 2.83882E-03 ( -0.000325338 0.000319167 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.43 using 59 PHA bins.
# Reduced chi-squared = 0.7795 for 57 degrees of freedom
# Null hypothesis probability = 8.874297e-01
Photon flux (15-150 keV) in 50.26 sec: 0.394036 ( -0.038999 0.0390257 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.31275e-06 ( -1.50977e-07 1.53302e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.552 sec. to 41.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40116 ( -0.747379 0.658662 )
Epeak [keV] : 65.9766 ( -20.4229 -65.9766 )
Norm@50keV : 4.77126E-03 ( -0.00204914 0.00712158 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.24 using 59 PHA bins.
# Reduced chi-squared = 0.7722 for 56 degrees of freedom
# Null hypothesis probability = 8.938497e-01
Photon flux (15-150 keV) in 50.26 sec: 0.386961 ( -0.040478 0.040459 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26772e-06 ( -1.64541e-07 1.6815e-07 ) ergs/cm2
Band function
Time interval is from -8.552 sec. to 41.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.44512 ( -0.47956 0.794163 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 69.6934 ( -26.4301 95.234 )
Norm@50keV : 4.48933E-03 ( -0.00189304 0.00745457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.26 using 59 PHA bins.
# Reduced chi-squared = 0.7865 for 55 degrees of freedom
# Null hypothesis probability = 8.740680e-01
Photon flux (15-150 keV) in 50.26 sec: 0.386288 ( 6.61371 -0.037938 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26013e-06 ( -1.25978e-06 -1.57947e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.9029 (-1.50784 1.74389)
R^2/D10^2 : 9.58733E-02 (-0.037811 0.062471)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.98 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 57 degrees of freedom
# Null hypothesis probability = 1.328152e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.443e-07 2.558e-08
25- 50 4.498e-07 6.494e-08
50-150 3.811e-07 8.398e-08
15-150 9.751e-07 1.327e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.5804 (-29.6878 55.6476)
Norm : 1.74275 (-0.229086 0.278018)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.289e-07 3.267e-08
25- 50 3.947e-07 4.672e-08
50-150 6.344e-07 2.791e-07
15-150 1.258e-06 2.895e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.42380 (-1.57193 1.77186)
R1^2/D10^2 : 1.16156 (-0.743619 3.61772)
kT2 [keV] : 19.8895 (-4.16803 6.78436)
R2^2/D10^2 : 1.14013E-02 (-0.00772406 0.0101836)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.383e-07 1.193e-07
25- 50 3.718e-07 1.491e-07
50-150 6.461e-07 3.557e-07
15-150 1.256e-06 5.043e-07
Peak spectrum fit
Power-law model
Time interval is from -0.068 sec. to 0.932 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31891 ( -0.175635 0.177004 )
Norm@50keV : 2.77307E-02 ( -0.00296984 0.00296389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.72 using 59 PHA bins.
# Reduced chi-squared = 0.9952 for 57 degrees of freedom
# Null hypothesis probability = 4.853981e-01
Photon flux (15-150 keV) in 1 sec: 3.32014 ( -0.361676 0.362109 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.72788e-07 ( -3.21809e-08 3.23435e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.068 sec. to 0.932 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.861752 ( -0.785525 0.542665 )
Epeak [keV] : 136.875 ( -55.7921 -136.875 )
Norm@50keV : 4.55970E-02 ( -0.0198214 0.0580379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.42 using 59 PHA bins.
# Reduced chi-squared = 0.9896 for 56 degrees of freedom
# Null hypothesis probability = 4.969148e-01
Photon flux (15-150 keV) in 1 sec: 3.27521 ( -0.36871 0.36829 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68755e-07 ( -3.3476e-08 3.3302e-08 ) ergs/cm2
Band function
Time interval is from -0.068 sec. to 0.932 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.861858 ( -0.36868 0.639219 )
beta : -10.00000 ( 10 3.62377e-13 )
Epeak [keV] : 136.882 ( -42.6088 -136.882 )
Norm@50keV : 4.55878E-02 ( -0.00483903 0.058159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.42 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 55 degrees of freedom
# Null hypothesis probability = 4.589203e-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] : 18.0624 (-2.33283 2.71532)
R^2/D10^2 : 0.214854 (-0.0804566 0.126369)
(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 1.402e-08 3.285e-09
25- 50 6.500e-08 1.032e-08
50-150 1.541e-07 3.100e-08
15-150 2.331e-07 3.250e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-36.3453 -200)
Norm : 13.7603 (-1.478 1.478)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.426e-08 1.887e-08
25- 50 6.591e-08 3.593e-08
50-150 1.445e-07 7.840e-08
15-150 2.447e-07 1.335e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.71079 (-3.38077 4.32597)
R1^2/D10^2 : 3.03022 (-2.25537 49.2544)
kT2 [keV] : 25.7172 (-5.95434 16.1285)
R2^2/D10^2 : 5.51500E-02 (-0.0452835 0.0913212)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.718e-08 1.454e-08
25- 50 6.230e-08 2.674e-08
50-150 1.791e-07 9.333e-08
15-150 2.685e-07 1.088e-07
Plot creation:
Sun Mar 26 06:26:11 EDT 2023