batgrbproduct Analysis for Trigger=723124
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): Mon Nov 21 20:33:24 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger723124/GCN5_download_cron
======================================================================
Trigger: 00723124 Segment: 000
BAT Trigger Time: 501387472 [s; MET]
Trigger Stop: 501387536 [s; MET]
UTC: 2016-11-21T02:17:34.809600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 176.394550776426 Dec: -6.89646435298575 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.16
Flight Position: [ source = BAT ]
RA: 176.394550776426 Dec: -6.89646435298575 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 176.415350637957 Dec: -6.85774112010775 [deg; J2000]
{ 11h 45m 39.7s , -06d 51' 27.9" }
+/- 4.16864842850332 [arcmin] (estimated 90% radius based on SNR)
+/- 2.84788930945751 [arcmin] (formal 1-sigma fit error)
SNR: 3.95740822484447
Angular difference between Flight and Ground position is 2.633118 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 48 +/- 35.7770876399966
Measured from: 1.00000011920929
to: 49.0000001192093 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: 1.00000011920929
to: 33.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.5
to: 9.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1
to: 65 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.229803 0.212803 0.016723 0.056811
0.045306 0.047557 0.042800 0.042145 [error]
Peak 0.006310 -0.004507 0.001727 0.010900
0.005647 0.005912 0.005148 0.005255 [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 6.17e-08 7.10e-08 5.87e-08 8.15e-08 2.21e-07 2.73e-07 erg/cm2
Error 1.78e-08 2.08e-08 3.14e-08 9.54e-08 7.60e-08 1.29e-07 erg/cm2
Peak flux Power-law 3.92e-02 1.27e-02 2.28e-03 4.76e-04 5.45e-02 5.41e-02 ph/cm2/s
Error 5.73e-02 2.95e-02 2.17e-02 2.91e-01 8.94e-02 3.01e-01 ph/cm2/s
Fluence Cutoff-PL 6.07e-08 9.47e-08 2.28e-08 3.10e-10 1.79e-07 1.79e-07 erg/cm2
Error 2.03e-08 3.05e-08 3.33e-08 1.17e-08 5.70e-08 5.76e-08 erg/cm2
Peak flux Cutoff-PL 5.08e-02 8.73e-03 1.35e-06 9.74e-17 5.94e-02 5.95e-02 ph/cm2/s
Error 6.85e-02 3.80e-02 5.30e-03 0.00e+00 8.21e-02 -------- ph/cm2/s
Fluence Band 6.02e-08 9.43e-08 2.29e-08 8.87e-10 1.83e-07 1.83e-07 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 2.273 0.495 - - 3.63e-04 1.46e-04 46.690 57
CPL -0.964 4.121 29.4 11.2 5.52e-02 3.07e+02 42.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.473 0.000 - - 1.38e-04 6.58e-04 65.060 57
CPL 1.000 0.000 50.0 0.0 1.04e-03 0.00e+00 65.420 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 64.000 1.000 65.000
T90 48.000 1.000 49.000
T50 32.000 1.000 33.000
Peak 1.000 8.500 9.500
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
176.4154 -6.8577 0.0485 6.3 173.6 0.3937 4.0 TRIG_00723124
------------------------------------------
Foreground time interval of the image:
1.000 65.000 (delta_t = 64.000 [sec])
Background time interval of the image:
-239.000 -204.240 (delta_t = 34.760 [sec])
-203.000 1.000 (delta_t = 204.000 [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 1.000 sec. to 65.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.27322 ( -0.450545 0.539709 )
Norm@50keV : 3.63331E-04 ( -0.000144608 0.000147629 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.69 using 59 PHA bins.
# Reduced chi-squared = 0.8191 for 57 degrees of freedom
# Null hypothesis probability = 8.333261e-01
Photon flux (15-150 keV) in 64 sec: 6.25507E-02 ( -0.0161312 0.0162308 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20947e-07 ( -7.19514e-08 8.01293e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.000 sec. to 65.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.964445 ( -5.61596 2.62628 )
Epeak [keV] : 29.3947 ( -13.4507 9.00875 )
Norm@50keV : 5.51812E-02 ( -0.0643497 614.835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.01 using 59 PHA bins.
# Reduced chi-squared = 0.7502 for 56 degrees of freedom
# Null hypothesis probability = 9.172697e-01
Photon flux (15-150 keV) in 64 sec: 6.11835E-02 ( -0.0150245 0.0152026 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.78518e-07 ( -5.08672e-08 6.31104e-08 ) ergs/cm2
Band function
Time interval is from 1.000 sec. to 65.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.964946 ( -1.82517 -0.0325502 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 29.5921 ( -6.83012 8.86428 )
Norm@50keV : 5.43619E-02 ( -0.0949102 24.4766 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.01 using 59 PHA bins.
# Reduced chi-squared = 0.7639 for 55 degrees of freedom
# Null hypothesis probability = 9.009107e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.82574e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.57439 (-1.61229 1.98987)
R^2/D10^2 : 9.46370E-02 (-0.0575788 0.149108)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.01 using 59 PHA bins.
# Reduced chi-squared = 0.7371 for 57 degrees of freedom
# Null hypothesis probability = 9.313186e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.015e-08 3.346e-08
25- 50 9.553e-08 4.763e-08
50-150 2.088e-08 1.479e-08
15-150 1.766e-07 9.968e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.5836 (-15.1199 35.1129)
Norm : 0.452616 (-0.163357 0.276804)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.09 using 59 PHA bins.
# Reduced chi-squared = 0.7735 for 57 degrees of freedom
# Null hypothesis probability = 8.944909e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.371e-08 2.638e-08
25- 50 7.948e-08 3.930e-08
50-150 5.383e-08 3.965e-08
15-150 1.970e-07 9.091e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.64228 (-5.65123 -5.65123)
R1^2/D10^2 : 8.56484E-02 (-0.0856374 -0.0856374)
kT2 [keV] : 8.39833 (-8.40126 -8.40126)
R2^2/D10^2 : 4.71710E-02 (-0.0470113 -0.0470113)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.98 using 59 PHA bins.
# Reduced chi-squared = 0.7632 for 55 degrees of freedom
# Null hypothesis probability = 9.016648e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.094e-08 5.699e-06
25- 50 9.407e-08 4.253e-05
50-150 2.456e-08 3.834e-04
15-150 1.796e-07 5.610e-04
Peak spectrum fit
Power-law model
Time interval is from 8.500 sec. to 9.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.47323 ( -3.48109 -3.48109 )
Norm@50keV : 1.37552E-04 ( -0.000137071 0.00117892 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.06 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 57 degrees of freedom
# Null hypothesis probability = 2.166022e-01
Photon flux (15-150 keV) in 1 sec: 5.44739E-02 ( -0.0543541 0.124405 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12844e-09 ( -2.12393e-09 1.16918e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.500 sec. to 9.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.04054E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.42 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 56 degrees of freedom
# Null hypothesis probability = 1.823297e-01
Photon flux (15-150 keV) in 1 sec: 5.93620E-02 ( -0.059362 0.104804 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95825e-09 ( -1.95825e-09 1.05336e-08 ) ergs/cm2
Band function
Time interval is from 8.500 sec. to 9.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.82951 ( 9.82951 9.82951 )
beta : -3.47868 ( 3.47841 3.47841 )
Epeak [keV] : 31.8233 ( -31.8233 -31.8233 )
Norm@50keV : 1.85988E-02 ( -0.0186037 0.160274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.06 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 55 degrees of freedom
# Null hypothesis probability = 1.662976e-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] : 4.17942 (-4.22616 -4.22616)
R^2/D10^2 : 1.17095 (-1.20797 -1.20797)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.93 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.198578e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.312e-09 8.620e-10
25- 50 5.359e-10 5.785e-10
50-150 8.441e-12 1.444e-11
15-150 1.856e-09 1.727e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6260 (-10.5469 -10.5469)
Norm : 1.70973 (-1.71218 -1.71218)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.00 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.181702e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.275e-09 8.120e-10
25- 50 5.944e-10 5.720e-10
50-150 4.791e-11 4.497e-11
15-150 1.917e-09 1.456e-09
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.16558 (-4.44213 -4.44213)
R1^2/D10^2 : 1.23836 (-0.933136 -0.933136)
kT2 [keV] : 197.693 (-197.985 -197.985)
R2^2/D10^2 : 6.37226E-06 (-6.32544e-06 -6.32544e-06)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.88 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 55 degrees of freedom
# Reduced chi-squared = 1.180 for 55 degrees of freedom
# Null hypothesis probability = 1.690830e-01
# Null hypothesis probability = 1.701454e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.303e-09 1.645e-09
25- 50 6.474e-10 2.935e-10
50-150 1.538e-11 5.595e-12
15-150 1.966e-09 1.416e-09
Plot creation:
Mon Nov 21 20:37:39 EST 2016