batgrbproduct Analysis for Trigger=659734
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): Fri Oct 16 21:33:43 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger659734/GCN5_download_cron
======================================================================
Trigger: 00659734 Segment: 000
BAT Trigger Time: 466651574.528 [s; MET]
Trigger Stop: 466651578.624 [s; MET]
UTC: 2015-10-16T01:25:59.250180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 267.59991952892 Dec: -29.0181886127176 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.9
Image Trigger?: NO
Rate S/N Ratio: 12.8062484748657 [ if not an image trigger ]
Image S/N Ratio: 6.9
Flight Position: [ source = BAT ]
RA: 267.59991952892 Dec: -29.0181886127176 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 267.619317359583 Dec: -29.0274764060997 [deg; J2000]
{ 17h 50m 28.6s , -29d 01' 38.9" }
+/- 2.50710171586695 [arcmin] (estimated 90% radius based on SNR)
+/- 1.29516937941454 [arcmin] (formal 1-sigma fit error)
SNR: 8.1822497451094
Angular difference between Flight and Ground position is 1.160301 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 13 +/- 5
Measured from: -3.52799987792969
to: 9.47200012207031 [s; relative to TRIGTIME]
T50: 5 +/- 2.82842712474619
Measured from: 0.472000122070312
to: 5.47200012207031 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.472000002861023
to: 1.47200000286102 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.52799999713898
to: 10.472000002861 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.237320 0.067628 0.021965 0.010173
0.025222 0.022006 0.018459 0.016590 [error]
Peak 0.042696 0.005251 0.002787 0.004022
0.006923 0.005889 0.004903 0.004466 [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 6.79e-08 2.91e-08 7.40e-09 2.31e-09 1.06e-07 1.07e-07 erg/cm2
Error 1.28e-08 1.21e-08 6.98e-09 4.51e-09 2.54e-08 2.69e-08 erg/cm2
Peak flux Power-law 3.89e-01 8.91e-02 1.04e-02 1.36e-03 4.89e-01 4.90e-01 ph/cm2/s
Error 1.03e-01 4.92e-02 1.42e-02 3.50e-03 1.39e-01 1.39e-01 ph/cm2/s
Fluence Cutoff-PL 6.79e-08 2.89e-08 7.26e-09 2.23e-09 1.05e-07 1.06e-07 erg/cm2
Error 1.27e-08 1.25e-08 8.21e-09 4.47e-09 2.24e-08 2.72e-08 erg/cm2
Peak flux Cutoff-PL 4.47e-01 5.57e-02 2.15e-05 1.18e-13 5.02e-01 5.02e-01 ph/cm2/s
Error 1.21e-01 6.16e-02 4.97e-03 0.00e+00 1.29e-01 1.29e-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 3.974 0.775 - - 3.49e-04 2.50e-04 63.090 57
CPL 1.000 0.000 50.0 0.0 3.21e-03 0.00e+00 102.460 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.094 0.982 - - 7.30e-04 8.16e-04 52.100 57
CPL 1.000 0.000 50.0 0.0 6.94e-03 0.00e+00 76.060 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 14.000 -3.528 10.472
T90 13.000 -3.528 9.472
T50 5.000 0.472 5.472
Peak 1.000 0.472 1.472
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
267.6193 -29.0275 0.0234 1.1 97.2 0.3454 8.2 TRIG_00659734
------------------------------------------
Foreground time interval of the image:
-3.528 10.472 (delta_t = 14.000 [sec])
Background time interval of the image:
-215.127 -3.528 (delta_t = 211.599 [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 -3.528 sec. to 10.472 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.97424 ( -0.684266 0.865124 )
Norm@50keV : 3.49359E-04 ( -0.000204173 0.000296002 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.09 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 57 degrees of freedom
# Null hypothesis probability = 2.700055e-01
Photon flux (15-150 keV) in 14 sec: 0.210656 ( -0.0391956 0.03941 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05746e-07 ( -2.40682e-08 2.66861e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.528 sec. to 10.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.20897E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 102.46 using 59 PHA bins.
# Reduced chi-squared = 1.8296 for 56 degrees of freedom
# Null hypothesis probability = 1.512810e-04
Photon flux (15-150 keV) in 14 sec: 0.210286 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05454e-07 ( -2.52358e-08 1.95135e-08 ) ergs/cm2
Band function
Time interval is from -3.528 sec. to 10.472 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.91851 ( 9.91851 9.91851 )
beta : -3.97424 ( -0.864519 0.683671 )
Epeak [keV] : 1.64262 ( -1.64262 -1.64262 )
Norm@50keV : 4.74831E-02 ( -0.02775 0.0402308 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.09 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.121592e-01
Photon flux (15-150 keV) in 14 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] : 3.70073 (-0.764753 0.925649)
R^2/D10^2 : 8.12347 (-8.12645 23.3433)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.33 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 57 degrees of freedom
# Null hypothesis probability = 1.861510e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.006e-08 3.912e-08
25- 50 2.014e-08 1.225e-08
50-150 1.502e-10 1.532e-10
15-150 9.035e-08 4.819e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.98998 (-2.86027 3.89029)
Norm : 8.96654 (-4.84351 14.2007)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.17 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 57 degrees of freedom
# Null hypothesis probability = 2.397765e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.927e-08 2.668e-08
25- 50 2.570e-08 1.306e-08
50-150 1.302e-09 1.259e-09
15-150 9.627e-08 3.912e-08
Double BB
# Reduced chi-squared = 1.145 for 55 degrees of freedom
# Reduced chi-squared = 1.145 for 55 degrees of freedom
# Null hypothesis probability = 2.052029e-01
# Null hypothesis probability = 2.108816e-01
# Null hypothesis probability = 2.114550e-01
# Null hypothesis probability = 2.120637e-01
# Null hypothesis probability = 2.126439e-01
# Null hypothesis probability = 2.131847e-01
# Null hypothesis probability = 2.136761e-01
# Null hypothesis probability = 2.141099e-01
# Null hypothesis probability = 2.144795e-01
# Null hypothesis probability = 2.147797e-01
# Null hypothesis probability = 2.152086e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.012e-08 3.865e-08
25- 50 2.088e-08 1.205e-08
50-150 4.679e-08 2.794e-08
15-150 1.378e-07 6.844e-08
Peak spectrum fit
Power-law model
Time interval is from 0.472 sec. to 1.472 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.09439 ( -0.848089 1.11496 )
Norm@50keV : 7.30351E-04 ( -0.000731236 0.000900681 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.10 using 59 PHA bins.
# Reduced chi-squared = 0.9140 for 57 degrees of freedom
# Null hypothesis probability = 6.591769e-01
Photon flux (15-150 keV) in 1 sec: 0.489362 ( -0.137881 0.139764 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72507e-08 ( -5.68286e-09 6.53433e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.472 sec. to 1.472 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 6.94231E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.06 using 59 PHA bins.
# Reduced chi-squared = 1.358 for 56 degrees of freedom
# Null hypothesis probability = 3.845715e-02
Photon flux (15-150 keV) in 1 sec: 0.502288 ( -0.128469 0.130472 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59015e-08 ( -4.3759e-09 4.7349e-09 ) ergs/cm2
Band function
Time interval is from 0.472 sec. to 1.472 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.01036 ( 1.77697 1.77697 )
beta : -10.0000 ( 9.99884 0.000250123 )
Epeak [keV] : 15.7207 ( -3.17627 5.2671 )
Norm@50keV : 3353.46 ( -3353.69 29234.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.26 using 59 PHA bins.
# Reduced chi-squared = 0.8956 for 55 degrees of freedom
# Null hypothesis probability = 6.927347e-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] : 3.52622 (-0.757412 0.931299)
R^2/D10^2 : 27.0831 (-27.0831 83.6557)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.45 using 59 PHA bins.
# Reduced chi-squared = 0.8676 for 57 degrees of freedom
# Null hypothesis probability = 7.509053e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.292e-08 7.405e-09
25- 50 3.206e-09 2.097e-09
50-150 1.729e-11 1.931e-11
15-150 1.614e-08 9.180e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.01293 (-2.72823 4.59323)
Norm : 28.3076 (-17.1777 56.0136)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.38 using 59 PHA bins.
# Reduced chi-squared = 0.8838 for 57 degrees of freedom
# Null hypothesis probability = 7.200139e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.230e-08 7.190e-09
25- 50 3.828e-09 2.489e-09
50-150 1.356e-10 1.521e-10
15-150 1.626e-08 9.225e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.52017 (-0.779125 0.884887)
R1^2/D10^2 : 27.1669 (-16.6625 78.8131)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 2.64453E-05 (-2.73982e-05 73.9698)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.22 using 59 PHA bins.
# Reduced chi-squared = 0.8768 for 55 degrees of freedom
# Null hypothesis probability = 7.292091e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.288e-08 7.690e-09
25- 50 3.456e-09 2.141e-09
50-150 7.019e-09 2.375e-11
15-150 2.335e-08 9.950e-09
Plot creation:
Fri Oct 16 21:38:44 EDT 2015