batgrbproduct analysis for trigger=1186386
batgrbproduct Analysis for Trigger=1186386
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): Tue Aug 22 16:28:30 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1186386/GCN5_download_cron
======================================================================
Trigger: 01186386 Segment: 000
BAT Trigger Time: 714322352 [s; MET]
Trigger Stop: 714322416 [s; MET]
UTC: 2023-08-21T14:52:00.133580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.716859231786 Dec: 35.3981281393785 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.07
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.07
Flight Position: [ source = BAT ]
RA: 299.716859231786 Dec: 35.3981281393785 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.704581312398 Dec: 35.3569898892817 [deg; J2000]
{ 19h 58m 49.1s , +35d 21' 25.2" }
+/- 1.53773016909005 [arcmin] (estimated 90% radius based on SNR)
+/- 0.758728135068484 [arcmin] (formal 1-sigma fit error)
SNR: 16.449274900373
Angular difference between Flight and Ground position is 2.540327 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.592656 0.799872 0.364919 0.104062
0.049667 0.050799 0.043710 0.038574 [error]
Peak 0.592656 0.799872 0.364919 0.104062
0.049667 0.050799 0.043710 0.038574 [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 1.97e-07 2.99e-07 3.40e-07 7.38e-07 1.06e-06 1.57e-06 erg/cm2
Error 2.34e-08 2.35e-08 4.21e-08 1.85e-07 9.81e-08 2.26e-07 erg/cm2
Peak flux Power-law 1.05e-01 8.77e-02 4.99e-02 4.20e-02 2.61e-01 2.84e-01 ph/cm2/s
Error 1.27e-02 6.93e-03 5.96e-03 9.78e-03 2.07e-02 2.26e-02 ph/cm2/s
Fluence Cutoff-PL 1.84e-07 3.25e-07 3.31e-07 2.29e-07 9.76e-07 1.07e-06 erg/cm2
Error 2.67e-08 3.43e-08 4.98e-08 2.89e-07 1.20e-07 3.15e-07 erg/cm2
Peak flux Cutoff-PL 9.71e-02 9.49e-02 4.95e-02 1.65e-02 2.53e-01 2.58e-01 ph/cm2/s
Error 1.47e-02 9.80e-03 6.84e-03 1.60e-02 2.20e-02 2.70e-02 ph/cm2/s
Fluence Band 1.76e-07 3.36e-07 3.17e-07 4.51e-07 9.93e-07 1.28e-06 erg/cm2
Error 2.76e-08 -------- 4.86e-08 -------- 1.10e-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 1.814 0.143 - - 1.88e-03 1.71e-04 48.860 57
CPL 1.093 0.740 53.6 60.4 4.84e-03 6.01e-03 45.450 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.814 0.143 - - 1.88e-03 1.71e-04 48.860 57
CPL 1.093 0.740 53.6 60.4 4.84e-03 6.01e-03 45.450 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.7046 +35.3570 0.0117 23.1 172.4 2.1345 16.4 TRIG_01186386
------------------------------------------
Foreground time interval of the image:
0.000 10.400 (delta_t = 10.400 [sec])
12.000 27.570 (delta_t = 15.570 [sec])
29.000 64.000 (delta_t = 35.000 [sec])
Background time interval of the image:
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
0.000000 10.400000
12.000000 27.570000
29.000000 64.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81427 ( -0.140838 0.144666 )
Norm@50keV : 1.88298E-03 ( -0.000172174 0.000169857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.86 using 59 PHA bins.
# Reduced chi-squared = 0.8571 for 57 degrees of freedom
# Null hypothesis probability = 7.700971e-01
Photon flux (15-150 keV) in 60.97 sec: 0.260920 ( -0.0206704 0.0206806 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05641e-06 ( -9.74673e-08 9.87933e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 10.400000
12.000000 27.570000
29.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09306 ( -0.813337 0.665788 )
Epeak [keV] : 53.5849 ( -10.9061 109.961 )
Norm@50keV : 4.83686E-03 ( -0.00277792 0.00924498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.45 using 59 PHA bins.
# Reduced chi-squared = 0.8117 for 56 degrees of freedom
# Null hypothesis probability = 8.420546e-01
Photon flux (15-150 keV) in 60.97 sec: 0.253028 ( -0.022007 0.021904 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.76154e-07 ( -1.17684e-07 1.22574e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 10.400000
12.000000 27.570000
29.000000 64.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.558830 ( -0.936314 0.545088 )
beta : -2.25197 ( 2.25199 0.391745 )
Epeak [keV] : 43.6167 ( -18.2117 18.7366 )
Norm@50keV : 1.07015E-02 ( -0.0114844 79.3275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.15 using 59 PHA bins.
# Reduced chi-squared = 0.7845 for 55 degrees of freedom
# Null hypothesis probability = 8.766763e-01
Photon flux (15-150 keV) in 60.97 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.92933e-07 ( -9.92506e-07 -1.0988e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.9286 (-0.930733 1.03097)
R^2/D10^2 : 8.90674E-02 (-0.0257841 0.0356107)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.95 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.192498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.353e-07 1.793e-08
25- 50 3.795e-07 3.439e-08
50-150 2.547e-07 5.253e-08
15-150 7.696e-07 7.347e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 90.8392 (-22.4623 36.7357)
Norm : 1.18342 (-0.131629 0.153898)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.883e-07 2.332e-08
25- 50 3.192e-07 3.076e-08
50-150 4.888e-07 1.879e-07
15-150 9.962e-07 1.860e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.95469 (-2.01608 1.32298)
R1^2/D10^2 : 0.164422 (-0.060323 0.168896)
kT2 [keV] : 54.4312 (-38.1591 -59.0659)
R2^2/D10^2 : 2.13835E-04 (-0.000156822 0.00409014)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.600e-07 2.975e-08
25- 50 3.582e-07 7.191e-08
50-150 5.077e-07 2.377e-07
15-150 1.026e-06 2.979e-07
Peak spectrum fit
Power-law model
Time interval is from 29.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81427 ( -0.140838 0.144666 )
Norm@50keV : 1.88298E-03 ( -0.000172174 0.000169857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.86 using 59 PHA bins.
# Reduced chi-squared = 0.8571 for 57 degrees of freedom
# Null hypothesis probability = 7.700971e-01
Photon flux (15-150 keV) in 60.97 sec: 0.260920 ( -0.0206704 0.0206806 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05641e-06 ( -9.74673e-08 9.87933e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 29.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09306 ( -0.813337 0.665788 )
Epeak [keV] : 53.5849 ( -10.9061 109.961 )
Norm@50keV : 4.83686E-03 ( -0.00277792 0.00924498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.45 using 59 PHA bins.
# Reduced chi-squared = 0.8117 for 56 degrees of freedom
# Null hypothesis probability = 8.420546e-01
Photon flux (15-150 keV) in 60.97 sec: 0.253028 ( -0.022007 0.021904 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.76154e-07 ( -1.17684e-07 1.22574e-07 ) ergs/cm2
Band function
Time interval is from 29.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.558830 ( -0.936314 0.545088 )
beta : -2.25197 ( 2.25199 0.391745 )
Epeak [keV] : 43.6167 ( -18.2117 18.7366 )
Norm@50keV : 1.07015E-02 ( -0.0114844 79.3249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.15 using 59 PHA bins.
# Reduced chi-squared = 0.7845 for 55 degrees of freedom
# Null hypothesis probability = 8.766763e-01
Photon flux (15-150 keV) in 60.97 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.92933e-07 ( -9.92506e-07 -1.0988e-07 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.9286 (-0.930733 1.03097)
R^2/D10^2 : 8.90674E-02 (-0.0257841 0.0356107)
(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 1.353e-07 1.878e-08
25- 50 3.795e-07 3.622e-08
50-150 2.547e-07 5.073e-08
15-150 7.696e-07 7.438e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 90.8392 (-22.4623 36.7357)
Norm : 1.18342 (-0.131629 0.153898)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.883e-07 2.402e-08
25- 50 3.192e-07 2.786e-08
50-150 4.888e-07 1.825e-07
15-150 9.962e-07 1.863e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.95469 (-2.01608 1.3216)
R1^2/D10^2 : 0.164422 (-0.060323 0.168896)
kT2 [keV] : 54.4312 (-38.1591 -59.0659)
R2^2/D10^2 : 2.13835E-04 (-0.000156822 0.00409014)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.600e-07 3.167e-08
25- 50 3.582e-07 7.429e-08
50-150 5.077e-07 2.350e-07
15-150 1.026e-06 3.011e-07
Plot creation:
Tue Aug 22 16:30:36 EDT 2023