batgrbproduct analysis for trigger=1187199
batgrbproduct Analysis for Trigger=1187199
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): Sat Aug 26 16:12:55 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1187199/GCN5_download_cron
======================================================================
Trigger: 01187199 Segment: 000
BAT Trigger Time: 714679208 [s; MET]
Trigger Stop: 714679272 [s; MET]
UTC: 2023-08-25T17:59:36.109200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.8722656810887 Dec: 22.2145435646669 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.72
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.72
Flight Position: [ source = BAT ]
RA: 83.8722656810887 Dec: 22.2145435646669 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.8731850716732 Dec: 22.2075378141571 [deg; J2000]
{ 05h 35m 29.6s , +22d 12' 27.1" }
+/- 1.31672649869826 [arcmin] (estimated 90% radius based on SNR)
+/- 0.490833134871614 [arcmin] (formal 1-sigma fit error)
SNR: 20.5310147364155
Angular difference between Flight and Ground position is 0.423436 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 180.031999945641 +/- 63.5486806413658
Measured from: 280.18799996376
to: 460.219999909401 [s; relative to TRIGTIME]
T50: 99.2079999446869 +/- 65.4773353641965
Measured from: 321.424000024796
to: 420.631999969482 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 463.731999993324
to: 464.731999993324 [s; relative to TRIGTIME]
Total Fluence
Measured from: 261.588000059128
to: 479.228000044823 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.266817 0.165026 0.152982 0.069072
0.119503 0.124926 0.105629 0.092590 [error]
Peak -0.020604 0.096814 0.018132 0.008966
0.030282 0.031599 0.022836 0.021018 [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 2.92e-07 3.78e-07 3.60e-07 6.05e-07 1.23e-06 1.63e-06 erg/cm2
Error 2.74e-08 2.29e-08 3.97e-08 1.35e-07 8.79e-08 1.75e-07 erg/cm2
Peak flux Power-law 1.51e-01 1.08e-01 5.15e-02 3.44e-02 3.27e-01 3.45e-01 ph/cm2/s
Error 1.45e-02 6.55e-03 5.47e-03 7.18e-03 2.02e-02 2.09e-02 ph/cm2/s
Fluence Cutoff-PL 2.84e-07 3.87e-07 3.57e-07 4.08e-07 1.20e-06 1.44e-06 erg/cm2
Error 3.14e-08 2.88e-08 4.17e-08 2.69e-07 1.05e-07 3.03e-07 erg/cm2
Peak flux Cutoff-PL 1.47e-01 1.11e-01 5.14e-02 2.53e-02 3.23e-01 3.34e-01 ph/cm2/s
Error 1.69e-02 8.05e-03 5.68e-03 1.25e-02 2.19e-02 2.78e-02 ph/cm2/s
Fluence Band 2.84e-07 3.83e-07 3.58e-07 4.84e-07 1.21e-06 1.52e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.47e-01 1.11e-01 5.14e-02 2.53e-02 3.23e-01 3.34e-01 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 101.39 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 217.640 261.588 479.228
T90 180.032 280.188 460.220
T50 99.208 321.424 420.632
Peak 1.000 463.732 464.732
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.8732 +22.2075 0.0094 11.3 133.4 2.5047 20.5 TRIG_01187199
------------------------------------------
Foreground time interval of the image:
0.000 23.060 (delta_t = 23.060 [sec])
24.000 64.000 (delta_t = 40.000 [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
261.588000 299.540000
301.000000 479.228000
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
261.588000 299.540000
301.000000 479.228000
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
261.588000 299.540000
301.000000 479.228000
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 463.732 sec. to 464.732 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 463.732 sec. to 464.732 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 463.732 sec. to 464.732 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:
Sat Aug 26 16:15:33 EDT 2023