batgrbproduct analysis for trigger=1192737
batgrbproduct Analysis for Trigger=1192737
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 27 12:42:41 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192737/GCN5_download_cron
======================================================================
Trigger: 01192737 Segment: 000
BAT Trigger Time: 717459144 [s; MET]
Trigger Stop: 717459248 [s; MET]
UTC: 2023-09-26T22:11:51.919180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.7707708572143 Dec: 22.5020949358446 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.53
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.53
Flight Position: [ source = BAT ]
RA: 83.7707708572143 Dec: 22.5020949358446 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.770556616042 Dec: 22.4967315019795 [deg; J2000]
{ 05h 35m 04.9s , +22d 29' 48.2" }
+/- 1.31233201527931 [arcmin] (estimated 90% radius based on SNR)
+/- 0.396908909180007 [arcmin] (formal 1-sigma fit error)
SNR: 20.6292998632755
Angular difference between Flight and Ground position is 0.322025 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 146.987999916077 +/- 80.7769325469858
Measured from: 777.820000171661
to: 924.808000087738 [s; relative to TRIGTIME]
T50: 75.2079999446869 +/- 59.9537401978635
Measured from: 798.696000099182
to: 873.904000043869 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 872.759999990463
to: 873.759999990463 [s; relative to TRIGTIME]
Total Fluence
Measured from: 775.151999950409
to: 929.552000045776 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.779239 1.621147 0.745865 0.077330
0.085335 0.086963 0.074470 0.065626 [error]
Peak 0.046243 0.025934 -0.000935 0.003215
0.007149 0.006218 0.005529 0.004986 [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 4.99e-07 6.24e-07 5.67e-07 8.97e-07 2.00e-06 2.59e-06 erg/cm2
Error 4.24e-08 3.39e-08 5.64e-08 1.81e-07 1.25e-07 2.37e-07 erg/cm2
Peak flux Power-law 1.57e-01 1.09e-01 4.94e-02 3.12e-02 3.30e-01 3.46e-01 ph/cm2/s
Error 1.36e-02 5.90e-03 4.72e-03 5.86e-03 1.85e-02 1.88e-02 ph/cm2/s
Fluence Cutoff-PL 4.95e-07 6.29e-07 5.65e-07 7.77e-07 1.98e-06 2.47e-06 erg/cm2
Error 4.68e-08 4.06e-08 5.83e-08 3.39e-07 1.47e-07 3.59e-07 erg/cm2
Peak flux Cutoff-PL 1.55e-01 1.09e-01 4.93e-02 2.79e-02 3.28e-01 3.42e-01 ph/cm2/s
Error 1.53e-02 6.93e-03 4.81e-03 9.99e-03 2.00e-02 2.41e-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 128.74 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 154.400 775.152 929.552
T90 146.988 777.820 924.808
T50 75.208 798.696 873.904
Peak 1.000 872.760 873.760
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.7706 +22.4967 0.0094 0.3 -169.0 4.0514 20.6 TRIG_01192737
------------------------------------------
Foreground time interval of the image:
0.000 104.000 (delta_t = 104.000 [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
775.152000 908.770000
910.000000 929.552000
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
775.152000 908.770000
910.000000 929.552000
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
775.152000 908.770000
910.000000 929.552000
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 872.760 sec. to 873.760 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 872.760 sec. to 873.760 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 872.760 sec. to 873.760 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:
Wed Sep 27 12:44:28 EDT 2023