batgrbproduct Analysis for Trigger=650617
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): Wed Jul 29 15:06:25 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger650617/GCN5_download_cron
======================================================================
Trigger: 00650617 Segment: 000
BAT Trigger Time: 459780685.952 [s; MET]
Trigger Stop: 459780686.976 [s; MET]
UTC: 2015-07-28T12:51:11.036780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 292.287805747232 Dec: 33.9039039617548 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.74
Image Trigger?: NO
Rate S/N Ratio: 7.93725393319377 [ if not an image trigger ]
Image S/N Ratio: 6.74
Flight Position: [ source = BAT ]
RA: 292.287805747232 Dec: 33.9039039617548 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 292.271193136122 Dec: 33.905766186835 [deg; J2000]
{ 19h 29m 05.1s , +33d 54' 20.8" }
+/- 2.59624002200727 [arcmin] (estimated 90% radius based on SNR)
+/- 1.14637814648133 [arcmin] (formal 1-sigma fit error)
SNR: 7.78389877135255
Angular difference between Flight and Ground position is 0.834785 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.832000017166138 +/- 0.230755269859374
Measured from: 0.304000079631805
to: 1.13600009679794 [s; relative to TRIGTIME]
T50: 0.448000013828278 +/- 0.181019365655138
Measured from: 0.43200010061264
to: 0.880000114440918 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.219999969005585
to: 1.21999996900558 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.239999949932098
to: 1.19999998807907 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.025263 0.022347 0.015464 0.007697
0.005317 0.005404 0.004486 0.003591 [error]
Peak 0.026413 0.020247 0.017059 0.007575
0.005417 0.005507 0.004585 0.003664 [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 7.35e-09 9.87e-09 9.74e-09 1.73e-08 3.26e-08 4.43e-08 erg/cm2
Error 2.30e-09 2.32e-09 4.28e-09 1.55e-08 9.67e-09 2.03e-08 erg/cm2
Peak flux Power-law 2.37e-01 1.81e-01 9.31e-02 6.88e-02 5.43e-01 5.80e-01 ph/cm2/s
Error 7.83e-02 4.15e-02 3.87e-02 5.64e-02 1.23e-01 1.36e-01 ph/cm2/s
Fluence Cutoff-PL 7.38e-09 9.87e-09 9.69e-09 1.69e-08 3.25e-08 4.39e-08 erg/cm2
Error 2.30e-09 2.40e-09 4.27e-09 1.84e-08 9.53e-09 2.17e-08 erg/cm2
Peak flux Cutoff-PL 2.38e-01 1.81e-01 9.24e-02 6.72e-02 5.43e-01 5.79e-01 ph/cm2/s
Error 7.82e-02 4.17e-02 2.81e-02 6.92e-02 1.23e-01 1.36e-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 2.018 0.481 - - 3.68e-03 1.17e-03 54.450 57
CPL 2.073 0.000 35.1 0.0 3.27e-03 0.00e+00 54.310 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.962 0.485 - - 3.68e-03 1.14e-03 58.130 57
CPL 2.669 0.000 221.4 0.0 1.67e-03 0.00e+00 57.640 56
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 0.960 0.240 1.200
T90 0.832 0.304 1.136
T50 0.448 0.432 0.880
Peak 1.000 0.220 1.220
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
292.2712 +33.9058 0.0248 11.4 -173.9 0.0754 7.8 TRIG_00650617
------------------------------------------
Foreground time interval of the image:
0.240 1.200 (delta_t = 0.960 [sec])
Background time interval of the image:
-239.952 0.240 (delta_t = 240.192 [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 0.240 sec. to 1.200 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01836 ( -0.445065 0.517107 )
Norm@50keV : 3.67980E-03 ( -0.00121562 0.00112567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.45 using 59 PHA bins.
# Reduced chi-squared = 0.9553 for 57 degrees of freedom
# Null hypothesis probability = 5.711913e-01
Photon flux (15-150 keV) in 0.96 sec: 0.556681 ( -0.125592 0.125595 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2611e-08 ( -9.42126e-09 9.92342e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.240 sec. to 1.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07345 ( )
Epeak [keV] : 35.0600 ( )
Norm@50keV : 3.27473E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9698 for 56 degrees of freedom
# Null hypothesis probability = 5.391106e-01
Photon flux (15-150 keV) in 0.96 sec: 0.556471 ( -0.125555 0.12551 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25195e-08 ( -9.39293e-09 9.67469e-09 ) ergs/cm2
Band function
Time interval is from 0.240 sec. to 1.200 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98488 ( -4.98488 -4.98488 )
beta : -2.06161 ( -0.685651 0.470162 )
Epeak [keV] : 18.2277 ( -18.2277 70.1495 )
Norm@50keV : 4850.24 ( -1092.31 7.78697e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.30 using 59 PHA bins.
# Reduced chi-squared = 0.9873 for 55 degrees of freedom
# Null hypothesis probability = 5.013008e-01
Photon flux (15-150 keV) in 0.96 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.64409 (-2.99364 4.23314)
R^2/D10^2 : 0.430366 (-0.327422 1.84208)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.552069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.878e-09 2.645e-09
25- 50 1.172e-08 6.118e-09
50-150 3.944e-09 2.915e-09
15-150 2.154e-08 1.150e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.9081 (-36.455 -66.9425)
Norm : 2.76070 (-0.89478 1.60521)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.91 using 59 PHA bins.
# Reduced chi-squared = 0.9809 for 57 degrees of freedom
# Null hypothesis probability = 5.159586e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.764e-09 2.303e-09
25- 50 1.063e-08 4.545e-09
50-150 1.320e-08 1.094e-08
15-150 3.059e-08 1.465e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.35421 (-1.76582 1.73847)
R1^2/D10^2 : 5.46361 (-4.68431 65.9754)
kT2 [keV] : 21.0383 (-9.27961 -21.0383)
R2^2/D10^2 : 1.20183E-02 (-0.01195 0.05345)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.08 using 59 PHA bins.
# Reduced chi-squared = 0.9832 for 55 degrees of freedom
# Null hypothesis probability = 5.099229e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.054e-09 4.532e-09
25- 50 8.201e-09 4.357e-09
50-150 1.643e-08 1.014e-08
15-150 3.269e-08 1.750e-08
Peak spectrum fit
Power-law model
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96170 ( -0.449224 0.52023 )
Norm@50keV : 3.68216E-03 ( -0.00119297 0.00109357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.13 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.334899e-01
Photon flux (15-150 keV) in 1 sec: 0.542821 ( -0.122911 0.122911 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.38984e-08 ( -9.81401e-09 1.0267e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.66890 ( )
Epeak [keV] : 221.362 ( )
Norm@50keV : 1.67318E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.64 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 56 degrees of freedom
# Null hypothesis probability = 4.144341e-01
Photon flux (15-150 keV) in 1 sec: 0.542616 ( -0.122894 0.122847 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.37629e-08 ( -9.6732e-09 1.00908e-08 ) ergs/cm2
Band function
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99472 ( -4.99472 -4.99472 )
beta : -1.99315 ( -0.599568 0.468735 )
Epeak [keV] : 17.6836 ( -17.6836 7.18777 )
Norm@50keV : 5712.12 ( -1292.2 7.16136e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.03 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Null hypothesis probability = 3.641837e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.82926 (-4.2266 5.44885)
R^2/D10^2 : 0.253572 (-0.196331 1.94297)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.99 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 57 degrees of freedom
# Null hypothesis probability = 1.326029e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.959e-09 2.568e-09
25- 50 1.203e-08 6.909e-09
50-150 5.972e-09 4.373e-09
15-150 2.296e-08 1.087e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.8852 (-45.4356 -79.955)
Norm : 2.51981 (-0.748125 1.3708)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.73 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 57 degrees of freedom
# Null hypothesis probability = 3.769322e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.538e-09 2.464e-09
25- 50 1.076e-08 5.035e-09
50-150 1.517e-08 1.297e-08
15-150 3.247e-08 1.739e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.02175 (-1.45172 2.03098)
R1^2/D10^2 : 7.57827 (-6.36578 70.3914)
kT2 [keV] : 21.2203 (-8.11899 31.5441)
R2^2/D10^2 : 1.23438E-02 (-0.0115315 0.0573994)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.73 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Null hypothesis probability = 4.103933e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.121e-09 4.722e-09
25- 50 8.003e-09 4.260e-09
50-150 1.820e-08 1.228e-08
15-150 3.432e-08 1.848e-08
Plot creation:
Wed Jul 29 15:09:41 EDT 2015