batgrbproduct analysis for trigger=818110
batgrbproduct Analysis for Trigger=818110
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 v2.46
Process Start Time (local time): Tue Mar 27 16:21:30 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger818110/GCN5_download_cron
======================================================================
Trigger: 00818110 Segment: 000
BAT Trigger Time: 543774128 [s; MET]
Trigger Stop: 543774192 [s; MET]
UTC: 2018-03-26T16:21:47.314100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.500959013233 Dec: -40.7600658019718 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.53
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.53
Flight Position: [ source = BAT ]
RA: 135.500959013233 Dec: -40.7600658019718 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.465901402821 Dec: -40.634263019052 [deg; J2000]
{ 09h 01m 51.8s , -40d 38' 03.3" }
+/- 4.21672758432511 [arcmin] (estimated 90% radius based on SNR)
+/- 2.50506402581244 [arcmin] (formal 1-sigma fit error)
SNR: 3.89310550014739
Angular difference between Flight and Ground position is 7.714798 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 332.095999956131 +/- 400.138401660802
Measured from: 137.448000073433
to: 469.544000029564 [s; relative to TRIGTIME]
T50: 188.927999854088 +/- 464.215082930713
Measured from: 207.528000116348
to: 396.455999970436 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 681.81200003624
to: 682.81200003624 [s; relative to TRIGTIME]
Total Fluence
Measured from: 122.600000023842
to: 844.136000037193 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.765350 2.317653 0.000139 -0.118546
0.176990 0.178857 0.153693 0.137990 [error]
Peak 0.023019 0.019741 -0.001199 0.014410
0.006398 0.006716 0.005993 0.005308 [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 2.85e-07 2.43e-07 1.41e-07 1.23e-07 7.22e-07 7.91e-07 erg/cm2
Error 3.17e-08 3.01e-08 3.50e-08 5.43e-08 8.92e-08 1.18e-07 erg/cm2
Peak flux Power-law 2.33e-01 1.34e-01 4.88e-02 2.34e-02 4.29e-01 4.40e-01 ph/cm2/s
Error 9.05e-02 5.35e-02 3.67e-02 3.62e-02 1.47e-01 1.55e-01 ph/cm2/s
Fluence Cutoff-PL 2.84e-07 2.83e-07 2.71e-08 5.44e-11 5.94e-07 5.94e-07 erg/cm2
Error 3.56e-08 4.24e-08 2.78e-08 7.42e-10 6.91e-08 6.91e-08 erg/cm2
Peak flux Cutoff-PL 2.95e-01 1.02e-01 8.90e-05 2.33e-13 3.97e-01 3.97e-01 ph/cm2/s
Error 1.03e-01 4.63e-02 5.41e-03 0.00e+00 1.25e-01 1.25e-01 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 38.98 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 721.536 122.600 844.136
T90 332.096 137.448 469.544
T50 188.928 207.528 396.456
Peak 1.000 681.812 682.812
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.4659 -40.6343 0.0495 13.1 10.0 0.2920 3.9 TRIG_00818110
------------------------------------------
Foreground time interval of the image:
36.160 71.201 (delta_t = 35.041 [sec])
Background time interval of the image:
-60.000 36.160 (delta_t = 96.160 [sec])
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
Time interval is from 122.600 sec. to 844.136 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 122.600 sec. to 844.136 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 122.600 sec. to 844.136 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
Peak spectrum fit
Power-law model
Time interval is from 681.812 sec. to 682.812 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 681.812 sec. to 682.812 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 681.812 sec. to 682.812 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 Mar 27 16:25:01 EDT 2018