batgrbproduct Analysis for Trigger=635306
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Thu Mar 19 06:00:25 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger635306/GCN5_download_cron
======================================================================
Trigger: 00635306 Segment: 000
BAT Trigger Time: 448368880 [s; MET]
Trigger Stop: 448368944 [s; MET]
UTC: 2015-03-18T10:54:26.674440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 183.006498806264 Dec: 12.0365853714023 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.82
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.82
Flight Position: [ source = BAT ]
RA: 183.006498806264 Dec: 12.0365853714023 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 182.87041249883 Dec: 12.1490034347274 [deg; J2000]
{ 12h 11m 28.9s , +12d 08' 56.4" }
+/- 4.92899314805759 [arcmin] (estimated 90% radius based on SNR)
+/- 3.19930966979071 [arcmin] (formal 1-sigma fit error)
SNR: 3.11504114884492
Angular difference between Flight and Ground position is 10.451805 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 0.143999993801117 +/- 0.0505964320074677
Measured from: 557.096000134945
to: 557.240000128746 [s; relative to TRIGTIME]
T50: 0.0800000429153442 +/- 0.0678822621206897
Measured from: 557.112000107765
to: 557.192000150681 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 556.684000015259
to: 557.684000015259 [s; relative to TRIGTIME]
Total Fluence
Measured from: 557.096000015736
to: 557.255999982357 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.004560 0.005044 0.005443 0.002749
0.002048 0.002013 0.001863 0.001500 [error]
Peak -0.003429 0.003642 0.001387 0.003687
0.005219 0.005247 0.004559 0.003752 [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 3.42e-08 3.08e-08 1.91e-08 1.81e-08 9.17e-08 1.01e-07 erg/cm2
Error 1.63e-08 1.74e-08 2.10e-08 3.63e-08 5.36e-08 8.08e-08 erg/cm2
Peak flux Power-law 1.77e-02 8.89e-03 2.76e-03 1.09e-03 2.99e-02 3.04e-02 ph/cm2/s
Error 8.51e-03 4.90e-03 2.97e-03 2.02e-03 1.41e-02 1.46e-02 ph/cm2/s
Fluence Cutoff-PL 4.14e-08 4.45e-08 3.54e-10 6.03e-17 8.64e-08 8.63e-08 erg/cm2
Error 1.90e-08 2.71e-08 4.70e-09 2.67e-11 3.41e-08 3.41e-08 erg/cm2
Peak flux Cutoff-PL 2.00e-02 1.41e-02 6.28e-05 5.28e-12 3.42e-02 3.42e-02 ph/cm2/s
Error 9.60e-03 7.89e-03 7.82e-04 2.41e-06 1.25e-02 1.25e-02 ph/cm2/s
Fluence Band 4.13e-08 4.68e-08 2.34e-09 1.44e-11 9.10e-08 9.08e-08 erg/cm2
Error 1.81e-08 2.43e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band 2.05e-02 1.43e-02 4.05e-04 1.24e-06 3.53e-02 3.53e-02 ph/cm2/s
Error 9.21e-03 7.16e-03 -------- -------- 1.29e-02 1.29e-02 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 69.85 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 0.160 557.096 557.256
T90 0.144 557.096 557.240
T50 0.080 557.112 557.192
Peak 1.000 556.684 557.684
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
182.8704 +12.1490 0.0617 10.5 82.6 0.2598 3.1 TRIG_00635306
------------------------------------------
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
Time interval is from 557.096 sec. to 557.256 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/raid2/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 557.096 sec. to 557.256 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/raid2/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 557.096 sec. to 557.256 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/raid2/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 556.684 sec. to 557.684 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/raid2/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 556.684 sec. to 557.684 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/raid2/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 556.684 sec. to 557.684 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/raid2/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:
Thu Mar 19 06:02:50 EDT 2015