batgrbproduct Analysis for Trigger=709351
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): Mon Aug 22 16:40:24 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger709351/GCN5_download_cron
======================================================================
Trigger: 00709351 Segment: 000
BAT Trigger Time: 493504486.912 [s; MET]
Trigger Stop: 493504487.936 [s; MET]
UTC: 2016-08-21T20:34:30.167540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 171.247515998307 Dec: 42.3431631317135 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.57
Image Trigger?: NO
Rate S/N Ratio: 22.494443758404 [ if not an image trigger ]
Image S/N Ratio: 12.57
Flight Position: [ source = BAT ]
RA: 171.247515998307 Dec: 42.3431631317135 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 171.253611846492 Dec: 42.3452849959968 [deg; J2000]
{ 11h 25m 00.9s , +42d 20' 43.0" }
+/- 0.761303753156411 [arcmin] (estimated 90% radius based on SNR)
+/- 0.187511467031931 [arcmin] (formal 1-sigma fit error)
SNR: 44.9077481929248
Angular difference between Flight and Ground position is 0.298809 arcmin
Partial Coding Fraction: 0.796875 [ including projection effects ]
Duration
T90: 112.595999896526 +/- 1.11211511284729
Measured from: 1.60000014305115
to: 114.196000039577 [s; relative to TRIGTIME]
T50: 67.8879999518394 +/- 2.0553501052829
Measured from: 20.2000001072884
to: 88.0880000591278 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 113.508000016212
to: 114.508000016212 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.61199998855591
to: 115.167999982834 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.306448 4.423771 3.197163 0.758538
0.096662 0.104449 0.092985 0.077339 [error]
Peak 0.191225 0.232286 0.165180 0.085593
0.030445 0.036826 0.033430 0.025327 [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 9.85e-07 1.79e-06 2.50e-06 7.30e-06 7.17e-06 1.26e-05 erg/cm2
Error 5.80e-08 5.98e-08 9.68e-08 6.50e-07 2.31e-07 7.04e-07 erg/cm2
Peak flux Power-law 1.88e+00 7.07e-01 1.53e-01 3.98e-02 2.77e+00 2.78e+00 ph/cm2/s
Error 4.45e-01 1.86e-01 6.54e-02 2.66e-02 6.31e-01 6.36e-01 ph/cm2/s
Fluence Cutoff-PL 9.84e-07 1.79e-06 2.50e-06 6.74e-06 7.17e-06 1.20e-05 erg/cm2
Error 6.17e-08 6.23e-08 1.00e-07 1.23e-06 2.27e-07 1.20e-06 erg/cm2
Peak flux Cutoff-PL 1.36e+00 1.93e+00 4.52e-01 6.75e-03 3.75e+00 3.75e+00 ph/cm2/s
Error 5.34e-01 4.13e-01 2.02e-01 8.89e-03 7.01e-01 7.01e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.44e+00 1.86e+00 4.90e-01 9.53e-03 3.77e+00 3.76e+00 ph/cm2/s
Error 4.18e-01 4.03e-01 1.71e-01 -------- 7.26e-01 7.30e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.518 0.058 - - 6.44e-03 1.92e-04 59.840 57
CPL 1.515 0.142 9992.0 0.0 6.46e-03 9.66e-04 59.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.196 0.360 - - 8.69e-03 3.09e-03 96.450 57
CPL -2.015 1.838 37.1 4.9 7.70e+00 5.06e+01 67.550 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: 102.272000 sec.
T50 in the 50-300 keV band: 63.936000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 117.780 -2.612 115.168
T90 112.596 1.600 114.196
T50 67.888 20.200 88.088
Peak 1.000 113.508 114.508
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
171.2536 +42.3453 0.0043 18.7 -67.5 6.7648 44.9 TRIG_00709351
------------------------------------------
Foreground time interval of the image:
-2.612 72.789 (delta_t = 75.401 [sec])
Background time interval of the image:
-239.912 -2.612 (delta_t = 237.300 [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 -2.612 sec. to 115.168 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51794 ( -0.0581537 0.0582731 )
Norm@50keV : 6.43751E-03 ( -0.000192272 0.000192124 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.84 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.730713e-01
Photon flux (15-150 keV) in 117.8 sec: 0.807592 ( -0.0259282 0.0260342 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.17337e-06 ( -2.30904e-07 2.3182e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.612 sec. to 115.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51536 ( -0.224934 0.0586237 )
Epeak [keV] : 9992.04 ( -9992.51 -9992.51 )
Norm@50keV : 6.45591E-03 ( -0.000193058 0.00173875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.84 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 56 degrees of freedom
# Null hypothesis probability = 3.381923e-01
Photon flux (15-150 keV) in 117.8 sec: 0.807277 ( -0.025028 0.025668 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.17256e-06 ( -2.23325e-07 2.30676e-07 ) ergs/cm2
Band function
Time interval is from -2.612 sec. to 115.168 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.801611 ( 0.950895 0.950895 )
beta : -1.54164 ( 1.54081 0.0707096 )
Epeak [keV] : 49.3855 ( -49.4739 -49.4739 )
Norm@50keV : 1.95684E-02 ( -0.0198544 733483 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.92 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 55 degrees of freedom
# Null hypothesis probability = 3.341457e-01
Photon flux (15-150 keV) in 117.8 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] : 15.8071 ( )
R^2/D10^2 : 7.24753E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 315.93 using 59 PHA bins.
# Reduced chi-squared = 5.5426 for 57 degrees of freedom
# Null hypothesis probability = 1.516555e-37
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.422e-07 2.715e-08
25- 50 1.842e-06 7.598e-08
50-150 3.201e-06 1.897e-07
15-150 5.485e-06 2.026e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.702 -200)
Norm : 3.28497 (-0.0974647 0.0974647)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.50 using 59 PHA bins.
# Reduced chi-squared = 1.184 for 57 degrees of freedom
# Null hypothesis probability = 1.610090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.637e-07 3.175e-08
25- 50 1.854e-06 6.008e-08
50-150 4.066e-06 1.266e-07
15-150 6.883e-06 2.332e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.49838 (-0.811662 0.891912)
R1^2/D10^2 : 0.671104 (-0.206389 0.327289)
kT2 [keV] : 29.7922 (-3.59673 5.234)
R2^2/D10^2 : 6.50809E-03 (-0.00270163 0.00369544)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.54 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 55 degrees of freedom
# Null hypothesis probability = 1.038070e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.696e-07 8.670e-08
25- 50 1.847e-06 1.278e-07
50-150 4.385e-06 4.547e-07
15-150 7.102e-06 5.054e-07
Peak spectrum fit
Power-law model
Time interval is from 113.508 sec. to 114.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.19619 ( -0.315763 0.404533 )
Norm@50keV : 8.68983E-03 ( -0.00317912 0.0029992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.45 using 59 PHA bins.
# Reduced chi-squared = 1.692 for 57 degrees of freedom
# Null hypothesis probability = 8.533841e-04
Photon flux (15-150 keV) in 1 sec: 2.76584 ( -0.630357 0.632631 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14909e-07 ( -2.7991e-08 2.86871e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 113.508 sec. to 114.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.01538 ( -2.0421 1.63412 )
Epeak [keV] : 37.1184 ( -5.42959 4.44683 )
Norm@50keV : 7.69989 ( -8.14568 93.1216 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.55 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 56 degrees of freedom
# Null hypothesis probability = 1.386965e-01
Photon flux (15-150 keV) in 1 sec: 3.75357 ( -0.70113 0.7 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.979e-07 ( -3.9494e-08 3.9739e-08 ) ergs/cm2
Band function
Time interval is from 113.508 sec. to 114.508 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.95411 ( -1.22628 2.01079 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 36.9032 ( -6.25458 4.21851 )
Norm@50keV : 7.23423 ( -7.22873 86.571 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.58 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 55 degrees of freedom
# Null hypothesis probability = 1.188331e-01
Photon flux (15-150 keV) in 1 sec: 3.77102 ( 3.22898 -0.74544 ) 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] : 9.42210 (-1.25815 1.06429)
R^2/D10^2 : 2.61246 (-0.959649 1.84472)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.27 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 57 degrees of freedom
# Null hypothesis probability = 1.658027e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.615e-08 1.263e-08
25- 50 1.052e-07 2.780e-08
50-150 4.611e-08 2.139e-08
15-150 1.975e-07 4.940e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.4430 (-6.3957 5.20774)
Norm : 31.8313 (-9.24451 10.394)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.31 using 59 PHA bins.
# Reduced chi-squared = 1.409 for 57 degrees of freedom
# Null hypothesis probability = 2.264915e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.038e-08 1.422e-08
25- 50 6.411e-08 1.601e-08
50-150 2.956e-08 1.426e-08
15-150 1.541e-07 4.015e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.06450 (-1.39098 8.62557)
R1^2/D10^2 : 5.49522E+05 (-616369 2.32719e+11)
kT2 [keV] : 9.57584 (-1.25574 1.07825)
R2^2/D10^2 : 2.37985 (-0.925216 1.4185)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.09 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.97 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 55 degrees of freedom
# Reduced chi-squared = 1.200 for 55 degrees of freedom
# Null hypothesis probability = 1.454499e-01
# Null hypothesis probability = 1.476632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.828e-08 1.640e-08
25- 50 1.016e-07 3.289e-08
50-150 4.718e-08 2.335e-08
15-150 1.970e-07 5.970e-08
Plot creation:
Mon Aug 22 16:44:43 EDT 2016