batgrbproduct analysis for trigger=1197506
batgrbproduct Analysis for Trigger=1197506
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 Nov 21 04:00:47 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1197506/GCN5_download_cron
======================================================================
Trigger: 01197506 Segment: 000
BAT Trigger Time: 722132224 [s; MET]
Trigger Stop: 722132576 [s; MET]
UTC: 2023-11-20T00:16:31.599100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.834817251391 Dec: 35.1034683668243 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.05
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.05
Flight Position: [ source = BAT ]
RA: 299.834817251391 Dec: 35.1034683668243 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.867514457249 Dec: 35.1020102444728 [deg; J2000]
{ 19h 59m 28.2s , +35d 06' 07.2" }
+/- 2.83164396564288 [arcmin] (estimated 90% radius based on SNR)
+/- 1.70729160515743 [arcmin] (formal 1-sigma fit error)
SNR: 6.87620608845524
Angular difference between Flight and Ground position is 1.607401 arcmin
Partial Coding Fraction: 0.1777344 [ including projection effects ]
Duration
T90: 20.2120000123978 +/- 11.9703094862879
Measured from: 405.560000061989
to: 425.772000074387 [s; relative to TRIGTIME]
T50: 13.8279999494553 +/- 10.7718225244159
Measured from: 403.552000164986
to: 417.380000114441 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 401.407999992371
to: 402.407999992371 [s; relative to TRIGTIME]
Total Fluence
Measured from: 395.503999948502
to: 429.544000029564 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.466903 0.592062 0.268269 -0.006289
0.053932 0.055924 0.046787 0.039501 [error]
Peak 0.031603 0.032472 0.012435 0.010360
0.011329 0.011394 0.009817 0.008172 [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 6.73e-07 9.41e-07 9.74e-07 1.85e-06 3.17e-06 4.44e-06 erg/cm2
Error 1.42e-07 1.27e-07 1.98e-07 7.69e-07 4.67e-07 9.58e-07 erg/cm2
Peak flux Power-law 1.83e-01 1.42e-01 7.33e-02 5.47e-02 4.23e-01 4.53e-01 ph/cm2/s
Error 3.94e-02 1.94e-02 1.43e-02 2.11e-02 5.94e-02 6.10e-02 ph/cm2/s
Fluence Cutoff-PL 6.74e-07 9.42e-07 9.73e-07 1.83e-06 3.17e-06 4.24e-06 erg/cm2
Error 1.48e-07 1.43e-07 2.01e-07 1.34e-06 2.45e-07 1.24e-06 erg/cm2
Peak flux Cutoff-PL 1.84e-01 1.42e-01 7.31e-02 5.40e-02 4.23e-01 4.53e-01 ph/cm2/s
Error 4.16e-02 2.13e-02 1.47e-02 3.88e-02 4.45e-02 6.76e-02 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.11e-01 1.57e-01 7.42e-02 4.16e-02 4.65e-01 4.85e-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 70.43 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 34.040 395.504 429.544
T90 20.212 405.560 425.772
T50 13.828 403.552 417.380
Peak 1.000 401.408 402.408
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.8675 +35.1020 0.0281 55.0 -175.6 5.2755 6.9 TRIG_01197506
------------------------------------------
Foreground time interval of the image:
0.000 63.158 (delta_t = 63.158 [sec])
173.000 179.090 (delta_t = 6.090 [sec])
181.000 204.130 (delta_t = 23.130 [sec])
206.000 211.230 (delta_t = 5.230 [sec])
213.000 215.457 (delta_t = 2.457 [sec])
218.000 224.192 (delta_t = 6.192 [sec])
227.000 233.370 (delta_t = 6.370 [sec])
235.000 238.790 (delta_t = 3.790 [sec])
240.000 243.100 (delta_t = 3.100 [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
395.504000 397.406000
399.000000 429.544000
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
395.504000 397.406000
399.000000 429.544000
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
395.504000 397.406000
399.000000 429.544000
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 401.408 sec. to 402.408 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 401.408 sec. to 402.408 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 401.408 sec. to 402.408 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:
Tue Nov 21 04:02:46 EST 2023