batgrbproduct Analysis for Trigger=718023
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 Oct 18 20:06:49 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger718023/GCN5_download_cron
======================================================================
Trigger: 00718023 Segment: 000
BAT Trigger Time: 498419528.192 [s; MET]
Trigger Stop: 498419529.216 [s; MET]
UTC: 2016-10-17T17:51:51.169980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 142.765381319357 Dec: 43.1418079589348 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.53
Image Trigger?: NO
Rate S/N Ratio: 19.5448202856921 [ if not an image trigger ]
Image S/N Ratio: 8.53
Flight Position: [ source = BAT ]
RA: 142.765381319357 Dec: 43.1418079589348 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 142.769958753287 Dec: 43.1247333885427 [deg; J2000]
{ 09h 31m 04.8s , +43d 07' 29.0" }
+/- 0.905906018570493 [arcmin] (estimated 90% radius based on SNR)
+/- 0.391301667600368 [arcmin] (formal 1-sigma fit error)
SNR: 35.0290349651784
Angular difference between Flight and Ground position is 1.043896 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 216.263999938965 +/- 6.88924607967477
Measured from: -0.0239998698234558
to: 216.240000069141 [s; relative to TRIGTIME]
T50: 125.767999947071 +/- 2.87351769515922
Measured from: 17.3640001416206
to: 143.132000088692 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 17.7840000391006
to: 18.7840000391006 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.8759999871254
to: 233.420000016689 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.783321 3.263728 2.438626 0.651354
0.080094 0.083697 0.073264 0.062383 [error]
Peak 0.094644 0.127476 0.118027 0.031013
0.006376 0.007300 0.006628 0.005167 [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 7.54e-07 1.34e-06 1.83e-06 5.15e-06 5.29e-06 9.07e-06 erg/cm2
Error 4.64e-08 4.63e-08 7.50e-08 4.88e-07 1.77e-07 5.29e-07 erg/cm2
Peak flux Power-law 7.63e-01 9.02e-01 7.69e-01 1.11e+00 2.83e+00 3.55e+00 ph/cm2/s
Error 8.57e-02 6.03e-02 5.29e-02 1.66e-01 1.67e-01 2.18e-01 ph/cm2/s
Fluence Cutoff-PL 7.57e-07 1.35e-06 1.84e-06 4.75e-06 5.26e-06 8.67e-06 erg/cm2
Error 4.88e-08 5.02e-08 8.03e-08 8.14e-07 1.95e-07 7.93e-07 erg/cm2
Peak flux Cutoff-PL 7.65e-01 9.03e-01 7.69e-01 1.10e+00 2.83e+00 3.54e+00 ph/cm2/s
Error 8.86e-02 4.55e-02 5.35e-02 2.42e-01 1.25e-01 2.82e-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 1.554 0.062 - - 2.36e-03 7.34e-05 40.620 57
CPL 1.555 0.087 9999.4 0.0 2.36e-03 2.80e-04 40.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.230 0.105 - - 2.40e-02 1.38e-03 63.750 57
CPL 1.230 0.105 9999.4 0.0 2.41e-02 5.05e-03 63.780 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: 219.392000 sec.
T50 in the 50-300 keV band: 120.256000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 238.296 -4.876 233.420
T90 216.264 -0.024 216.240
T50 125.768 17.364 143.132
Peak 1.000 17.784 18.784
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
142.7700 +43.1247 0.0055 8.7 -20.0 1.5786 35.0 TRIG_00718023
------------------------------------------
Foreground time interval of the image:
-4.876 14.809 (delta_t = 19.685 [sec])
Background time interval of the image:
-239.192 -34.092 (delta_t = 205.100 [sec])
-33.192 -4.876 (delta_t = 28.316 [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 -4.876 sec. to 233.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55363 ( -0.061697 0.0618648 )
Norm@50keV : 2.35718E-03 ( -7.34056e-05 7.33145e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.62 using 59 PHA bins.
# Reduced chi-squared = 0.7127 for 57 degrees of freedom
# Null hypothesis probability = 9.503011e-01
Photon flux (15-150 keV) in 238.3 sec: 0.298720 ( -0.0100014 0.0100497 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.28535e-06 ( -1.76963e-07 1.77768e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.876 sec. to 233.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55451 ( -0.11397 0.0603153 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.36015E-03 ( -7.25908e-05 0.000486992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.65 using 59 PHA bins.
# Reduced chi-squared = 0.7259 for 56 degrees of freedom
# Null hypothesis probability = 9.387977e-01
Photon flux (15-150 keV) in 238.3 sec: 0.298781 ( -0.010042 0.009821 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.89903e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from -4.876 sec. to 233.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.14406 ( 1.145 1.145 )
beta : -1.55696 ( -0.978543 0.0636473 )
Epeak [keV] : 48.5995 ( -47.8251 9921.17 )
Norm@50keV : 4.87341E-03 ( -0.00272372 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.53 using 59 PHA bins.
# Reduced chi-squared = 0.7369 for 55 degrees of freedom
# Null hypothesis probability = 9.275910e-01
Photon flux (15-150 keV) in 238.3 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] : 15.7049 ( )
R^2/D10^2 : 2.69501E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 289.19 using 59 PHA bins.
# Reduced chi-squared = 5.0736 for 57 degrees of freedom
# Null hypothesis probability = 8.689607e-33
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.288e-07 2.085e-08
25- 50 1.362e-06 5.683e-08
50-150 2.330e-06 1.593e-07
15-150 4.021e-06 1.466e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-20.4322 -200)
Norm : 1.20473 (-0.0371157 0.0371157)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.95 using 59 PHA bins.
# Reduced chi-squared = 0.8413 for 57 degrees of freedom
# Null hypothesis probability = 7.977601e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.150e-07 2.538e-08
25- 50 1.375e-06 4.849e-08
50-150 3.016e-06 1.060e-07
15-150 5.107e-06 1.752e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.61916 (-0.782073 0.89411)
R1^2/D10^2 : 0.387902 (-0.139357 0.236611)
kT2 [keV] : 26.7173 (-2.84351 3.99766)
R2^2/D10^2 : 3.50968E-03 (-0.0013464 0.00174659)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.99 using 59 PHA bins.
# Reduced chi-squared = 0.9634 for 55 degrees of freedom
# Null hypothesis probability = 5.519381e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.116e-07 7.983e-08
25- 50 1.336e-06 9.234e-08
50-150 3.165e-06 2.586e-07
15-150 5.213e-06 3.729e-07
Peak spectrum fit
Power-law model
Time interval is from 17.784 sec. to 18.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22967 ( -0.104765 0.104282 )
Norm@50keV : 2.40096E-02 ( -0.00137953 0.00137915 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.75 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.510861e-01
Photon flux (15-150 keV) in 1 sec: 2.83057 ( -0.166628 0.166834 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41594e-07 ( -1.5721e-08 1.57985e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 17.784 sec. to 18.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22960 ( -0.108208 0.102274 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.40655E-02 ( -0.00138379 0.00872302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.78 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 56 degrees of freedom
# Null hypothesis probability = 2.218541e-01
Photon flux (15-150 keV) in 1 sec: 2.83097 ( -0.08397 0.16546 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.41686e-07 ( -1.5656e-08 1.5555e-08 ) ergs/cm2
Band function
Time interval is from 17.784 sec. to 18.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.606336 ( 0.878721 0.878721 )
beta : -1.23627 ( 1.23453 0.108595 )
Epeak [keV] : 50.8754 ( -50.1174 396.95 )
Norm@50keV : 7.36565E-02 ( -0.0758881 1.49798e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.68 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 55 degrees of freedom
# Null hypothesis probability = 1.975532e-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] : 18.6803 ( )
R^2/D10^2 : 0.158586 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 145.34 using 59 PHA bins.
# Reduced chi-squared = 2.5498 for 57 degrees of freedom
# Null hypothesis probability = 1.173234e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.094e-08 1.284e-09
25- 50 5.200e-08 4.195e-09
50-150 1.329e-07 1.330e-08
15-150 1.958e-07 1.495e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-11.7454 -200)
Norm : 11.6490 (-0.680392 0.680392)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.16 using 59 PHA bins.
# Reduced chi-squared = 1.617 for 57 degrees of freedom
# Null hypothesis probability = 2.199697e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.900e-08 1.815e-09
25- 50 5.579e-08 4.015e-09
50-150 1.224e-07 2.712e-08
15-150 2.071e-07 2.725e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.69145 (-1.39941 1.59596)
R1^2/D10^2 : 1.93715 (-0.869611 1.87553)
kT2 [keV] : 35.4238 (-6.74257 12.5878)
R2^2/D10^2 : 1.72085E-02 (-0.0100284 0.0164828)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.64 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 55 degrees of freedom
# Null hypothesis probability = 1.984645e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.313e-08 5.115e-09
25- 50 5.272e-08 8.790e-09
50-150 1.699e-07 4.380e-08
15-150 2.457e-07 5.455e-08
Plot creation:
Tue Oct 18 20:16:58 EDT 2016