batgrbproduct Analysis for Trigger=706396
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 Jul 29 02:43:27 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger706396/GCN5_download_cron
======================================================================
Trigger: 00706396 Segment: 000
BAT Trigger Time: 491362087.872 [s; MET]
Trigger Stop: 491362087.936 [s; MET]
UTC: 2016-07-28T01:27:51.247840 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 169.827639693415 Dec: -61.4775075128405 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 12.66
Image Trigger?: NO
Rate S/N Ratio: 31.7647603485372 [ if not an image trigger ]
Image S/N Ratio: 12.66
Flight Position: [ source = BAT ]
RA: 169.827639693415 Dec: -61.4775075128405 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 169.886670171596 Dec: -61.4598644089793 [deg; J2000]
{ 11h 19m 32.8s , -61d 27' 35.5" }
+/- 3.39985553104785 [arcmin] (estimated 90% radius based on SNR)
+/- 2.25053679707063 [arcmin] (formal 1-sigma fit error)
SNR: 5.29528265346009
Angular difference between Flight and Ground position is 1.995622 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 96.0000000596046 +/- 0.0905095985338717
Measured from: 1.19209289550781e-07
to: 96.0000001788139 [s; relative to TRIGTIME]
T50: 96.0000000596046 +/- 67.9501369392054
Measured from: 1.19209289550781e-07
to: 96.0000001788139 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0199999809265137
to: 0.980000019073486 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 96 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.089982 0.098592 -0.006803 -0.029970
0.055941 0.056198 0.047375 0.042255 [error]
Peak 0.050523 0.072156 0.016927 0.000112
0.006601 0.006828 0.005181 0.004219 [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 3.99e-08 2.50e-08 1.01e-08 5.46e-09 7.78e-08 8.04e-08 erg/cm2
Error 3.15e-08 2.59e-08 2.15e-08 3.68e-08 7.38e-08 9.83e-08 erg/cm2
Peak flux Power-law 5.46e-01 3.77e-01 1.71e-01 1.08e-01 1.15e+00 1.20e+00 ph/cm2/s
Error 9.41e-02 5.14e-02 3.97e-02 4.55e-02 1.53e-01 1.62e-01 ph/cm2/s
Fluence Cutoff-PL 3.94e-08 3.01e-08 1.03e-08 1.79e-09 8.17e-08 8.09e-08 erg/cm2
Error 3.17e-08 4.08e-08 2.23e-08 3.53e-08 7.80e-08 9.52e-08 erg/cm2
Peak flux Cutoff-PL 4.66e-01 4.95e-01 1.32e-01 5.16e-03 1.10e+00 1.10e+00 ph/cm2/s
Error 1.10e-01 8.36e-02 5.61e-02 1.41e-02 1.52e-01 1.53e-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 3.313 -0.977 - - 5.84e-05 8.75e-05 50.590 57
CPL 1.046 0.000 17.0 0.0 1.44e-03 0.00e+00 50.520 56
The chi2 of BB fit is 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 2.140 0.238 - - 7.15e-03 1.28e-03 67.770 57
CPL -0.468 1.879 35.2 5.8 2.90e-01 3.92e+00 57.480 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 96.000 0.000 96.000
T90 96.000 0.000 96.000
T50 96.000 0.000 96.000
Peak 1.000 -0.020 0.980
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
169.8867 -61.4599 0.0363 14.0 -30.1 0.1705 5.3 TRIG_00706396
------------------------------------------
Foreground time interval of the image:
0.000 8.529 (delta_t = 8.529 [sec])
Background time interval of the image:
-42.671 0.000 (delta_t = 42.671 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 68.228000
69.128000 81.428000
82.128000 96.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.31301 ( -1.35854 -3.31301 )
Norm@50keV : 5.84146E-05 ( -5.84147e-05 0.000116531 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.59 using 59 PHA bins.
# Reduced chi-squared = 0.8875 for 57 degrees of freedom
# Null hypothesis probability = 7.128102e-01
Photon flux (15-150 keV) in 94.4 sec: 2.03526E-02 ( -0.0203526 0.0129834 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77531e-08 ( -6.76006e-08 8.00031e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 68.228000
69.128000 81.428000
82.128000 96.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04649 ( )
Epeak [keV] : 16.9980 ( )
Norm@50keV : 1.44201E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.52 using 59 PHA bins.
# Reduced chi-squared = 0.9022 for 56 degrees of freedom
# Null hypothesis probability = 6.815188e-01
Photon flux (15-150 keV) in 94.4 sec: 2.13172E-02 ( -0.0213172 0.012672 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.1702e-08 ( -8.1702e-08 7.43837e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 68.228000
69.128000 81.428000
82.128000 96.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.59198 ( 1.59217 1.59217 )
beta : -9.37149 ( 9.37165 19.3716 )
Epeak [keV] : 9.86792 ( -9.84562 -9.84562 )
Norm@50keV : 6.59014E-04 ( -0.000659305 380351 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.49 using 59 PHA bins.
# Reduced chi-squared = 0.9180 for 55 degrees of freedom
# Null hypothesis probability = 6.474399e-01
Photon flux (15-150 keV) in 94.4 sec: 2.09538E-02 ( 6.97905 -0.0109108 ) 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] : 7.22929 (-7.23076 5.23128)
R^2/D10^2 : 3.84046E-02 (-0.0383726 -0.0383726)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.98 using 59 PHA bins.
# Reduced chi-squared = 0.8944 for 57 degrees of freedom
# Null hypothesis probability = 6.991633e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.144e-08 2.087e-08
25- 50 4.579e-08 3.356e-08
50-150 8.514e-09 7.864e-09
15-150 8.574e-08 6.070e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.0553 (-21.1591 57.6872)
Norm : 0.251506 (-0.250505 -0.250505)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.8861 for 57 degrees of freedom
# Null hypothesis probability = 7.155877e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.841e-08 2.506e-08
25- 50 3.497e-08 2.565e-08
50-150 1.140e-08 1.367e-08
15-150 8.479e-08 5.909e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.213738 (-0.213666 3.05548)
R1^2/D10^2 : 1.03095E+23 (-1.27509e+22 -9.95089e+22)
kT2 [keV] : 8.49626 (-4.39549 6.28182)
R2^2/D10^2 : 1.75060E-02 (-0.0163268 0.0793354)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.51 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.28 using 59 PHA bins.
# Reduced chi-squared = 0.8639 for 55 degrees of freedom
# Reduced chi-squared = 0.8596 for 55 degrees of freedom
# Null hypothesis probability = 7.532366e-01
# Null hypothesis probability = 7.609129e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.054e-08 1.445e-08
25- 50 4.038e-08 2.727e-08
50-150 1.545e-08 1.563e-08
15-150 8.637e-08 5.074e-08
Peak spectrum fit
Power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14011 ( -0.228353 0.247281 )
Norm@50keV : 7.14516E-03 ( -0.00129185 0.00126725 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.77 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.555457e-01
Photon flux (15-150 keV) in 1 sec: 1.14690 ( -0.15291 0.15291 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.66655e-08 ( -1.06565e-08 1.096e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.467555 ( -2.22839 1.52954 )
Epeak [keV] : 35.1738 ( -5.65905 5.96279 )
Norm@50keV : 0.289974 ( -0.312196 7.53553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.201066e-01
Photon flux (15-150 keV) in 1 sec: 1.09861 ( -0.151711 0.15256 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.6519e-08 ( -9.0744e-09 1.02868e-08 ) ergs/cm2
Band function
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.06434 ( -2.0215 -1.0442 )
beta : -3.68518 ( 3.68483 1.143 )
Epeak [keV] : 34.0923 ( -6.05365 6.23459 )
Norm@50keV : 0.738073 ( -0.692716 171.634 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.28 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 55 degrees of freedom
# Null hypothesis probability = 3.904075e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.87454e-08 ( -5.87384e-08 -1.08265e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.00170 (-1.04818 1.18653)
R^2/D10^2 : 0.865034 (-0.336582 0.540209)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.29 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.277979e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.365e-08 3.045e-09
25- 50 2.902e-08 4.630e-09
50-150 1.108e-08 3.873e-09
15-150 5.374e-08 1.004e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 48.1087 (-12.9895 21.0861)
Norm : 6.82325 (-1.34049 1.73542)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.49 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 57 degrees of freedom
# Null hypothesis probability = 3.183348e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.653e-08 2.565e-09
25- 50 2.341e-08 3.830e-09
50-150 2.191e-08 7.940e-09
15-150 6.185e-08 1.202e-08
Double BB
R1^2/D10^2 : 3150.35 (-3177.64 -3177.64)
kT2 [keV] : 9.33170 (-1.18243 -9.33169)
R2^2/D10^2 : 0.731321 (-0.731351 0.479028)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.97 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.95 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 55 degrees of freedom
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.001256e-01
# Null hypothesis probability = 4.018275e-01
# Null hypothesis probability = 4.023775e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.417e-08 4.463e-09
25- 50 2.824e-08 7.940e-09
50-150 1.225e-08 5.345e-09
15-150 5.465e-08 1.416e-08
Plot creation:
Fri Jul 29 02:50:01 EDT 2016