batgrbproduct analysis for trigger=1192251
batgrbproduct Analysis for Trigger=1192251
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 Sep 17 01:44:10 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192251/GCN5_download_cron
======================================================================
Trigger: 01192251 Segment: 000
BAT Trigger Time: 716530368 [s; MET]
Trigger Stop: 716530432 [s; MET]
UTC: 2023-09-16T04:12:15.982780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 261.77417118717 Dec: -17.0322347768231 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 21.96
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 21.96
Flight Position: [ source = BAT ]
RA: 261.77417118717 Dec: -17.0322347768231 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 261.780115302483 Dec: -17.0323787082253 [deg; J2000]
{ 17h 27m 07.2s , -17d 01' 56.6" }
+/- 0.987986649103763 [arcmin] (estimated 90% radius based on SNR)
+/- 0.251928032795693 [arcmin] (formal 1-sigma fit error)
SNR: 30.9468780107376
Angular difference between Flight and Ground position is 0.341114 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 7.19599997997284 +/- 7.72007696430923
Measured from: 92.6960000991821
to: 99.892000079155 [s; relative to TRIGTIME]
T50: 5.26399993896484 +/- 3.14233855948967
Measured from: 93.4440001249313
to: 98.7080000638962 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 95.7120000123978
to: 96.7120000123978 [s; relative to TRIGTIME]
Total Fluence
Measured from: 77.6799999475479
to: 100.368000030518 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.407372 0.324972 0.084004 -0.016411
0.028487 0.024836 0.019580 0.016692 [error]
Peak 0.074828 0.053108 0.015342 -0.005307
0.009970 0.008477 0.006811 0.005496 [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 1.28e-06 1.01e-06 5.44e-07 4.25e-07 3.03e-06 3.26e-06 erg/cm2
Error 8.42e-08 4.60e-08 5.29e-08 7.99e-08 1.34e-07 1.60e-07 erg/cm2
Peak flux Power-law 6.62e-01 2.96e-01 7.92e-02 2.63e-02 1.05e+00 1.06e+00 ph/cm2/s
Error 4.48e-02 1.31e-02 7.42e-03 4.64e-03 5.12e-02 5.06e-02 ph/cm2/s
Fluence Cutoff-PL 1.18e-06 1.07e-06 4.72e-07 1.08e-07 2.81e-06 2.84e-06 erg/cm2
Error 1.00e-07 5.81e-08 7.30e-08 9.17e-08 1.73e-07 2.04e-07 erg/cm2
Peak flux Cutoff-PL 6.09e-01 3.13e-01 7.06e-02 8.26e-03 9.99e-01 1.00e+00 ph/cm2/s
Error 5.42e-02 1.65e-02 9.89e-03 -------- 5.93e-02 6.02e-02 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 0.000 0.000 - - 0.00e+00 0.00e+00 0.000 0
CPL 0.000 0.000 0.0 0.0 0.00e+00 0.00e+00 0.000 0
The chi2 of BB fit is 107.44 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.000 0.000 - - 0.00e+00 0.00e+00 0.000 0
CPL 0.000 0.000 0.0 0.0 0.00e+00 0.00e+00 0.000 0
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 22.688 77.680 100.368
T90 7.196 92.696 99.892
T50 5.264 93.444 98.708
Peak 1.000 95.712 96.712
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
261.7801 -17.0324 0.0062 32.1 3.0 6.7522 30.9 TRIG_01192251
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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
77.680000 77.790000
92.000000 100.368000
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
This script tries to add the systematic column to the PHA
file before doing the fitting
script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
77.680000 77.790000
92.000000 100.368000
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
This script tries to add the systematic column to the PHA
file before doing the fitting
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
Band function
Multiple GTIs in the spectrum
tstart tstop
77.680000 77.790000
92.000000 100.368000
Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
This script tries to add the systematic column to the PHA
file before doing the fitting
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
Single BB
Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)
This script tries to add the systematic column to the PHA
file before doing the fitting
Thermal bremsstrahlung (OTTB)
Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)
This script tries to add the systematic column to the PHA
file before doing the fitting
Double BB
Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)
This script tries to add the systematic column to the PHA
file before doing the fitting
Peak spectrum fit
Power-law model
Time interval is from 95.712 sec. to 96.712 sec.
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
This script tries to add the systematic column to the PHA
file before doing the fitting
script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
Cutoff power-law model
Time interval is from 95.712 sec. to 96.712 sec.
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
This script tries to add the systematic column to the PHA
file before doing the fitting
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
Band function
Time interval is from 95.712 sec. to 96.712 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
This script tries to add the systematic column to the PHA
file before doing the fitting
script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
Single BB
Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)
This script tries to add the systematic column to the PHA
file before doing the fitting
Thermal bremsstrahlung (OTTB)
Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)
This script tries to add the systematic column to the PHA
file before doing the fitting
Double BB
Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)
This script tries to add the systematic column to the PHA
file before doing the fitting
Plot creation:
Sun Sep 17 01:45:14 EDT 2023