batgrbproduct Analysis for Trigger=714404
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): Sat Oct 1 10:05:40 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger714404/batgroup_hand_proc
======================================================================
Trigger: 00714404 Segment: 000
BAT Trigger Time: 496976733.628 [s; MET]
Trigger Stop: 496976733.692 [s; MET]
UTC: 2016-10-01T01:05:16.687760 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 71.9131924986459 Dec: -57.2827127678074 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.36
Image Trigger?: NO
Rate S/N Ratio: 16.2172747402269 [ if not an image trigger ]
Image S/N Ratio: 7.36
Flight Position: [ source = BAT ]
RA: 71.9131924986459 Dec: -57.2827127678074 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 71.9228621680703 Dec: -57.2610616595733 [deg; J2000]
{ 04h 47m 41.5s , -57d 15' 39.8" }
+/- 0.969409638639811 [arcmin] (estimated 90% radius based on SNR)
+/- 0.319043007355519 [arcmin] (formal 1-sigma fit error)
SNR: 31.7975469930809
Angular difference between Flight and Ground position is 1.336401 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 2.60399997234344 +/- 0.40051963120828
Measured from: -0.108000040054321
to: 2.49599993228912 [s; relative to TRIGTIME]
T50: 1.24399995803833 +/- 0.141364796385792
Measured from: 0.519999980926514
to: 1.76399993896484 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.39999997615814
to: 2.39999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.216000020503998
to: 3.11199998855591 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.212250 0.336400 0.329646 0.093980
0.015281 0.016354 0.015329 0.012064 [error]
Peak 0.073936 0.149540 0.174750 0.047737
0.008821 0.009916 0.009836 0.007711 [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 5.91e-08 1.35e-07 2.45e-07 1.05e-06 6.66e-07 1.49e-06 erg/cm2
Error 5.94e-09 8.03e-09 1.46e-08 1.43e-07 3.75e-08 1.51e-07 erg/cm2
Peak flux Power-law 6.87e-01 1.00e+00 1.09e+00 2.20e+00 3.45e+00 4.98e+00 ph/cm2/s
Error 9.74e-02 8.56e-02 7.56e-02 3.41e-01 2.30e-01 3.77e-01 ph/cm2/s
Fluence Cutoff-PL 5.48e-08 1.39e-07 2.53e-07 6.75e-07 6.54e-07 1.12e-06 erg/cm2
Error 7.44e-09 8.99e-09 1.71e-08 3.28e-07 4.03e-08 3.27e-07 erg/cm2
Peak flux Cutoff-PL 6.18e-01 1.01e+00 1.13e+00 1.56e+00 3.40e+00 4.33e+00 ph/cm2/s
Error 1.29e-01 9.06e-02 9.87e-02 5.82e-01 2.40e-01 7.14e-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 1.144 0.090 - - 1.94e-02 9.84e-04 55.150 57
CPL 0.814 0.370 200.4 -60.6 2.75e-02 1.05e-02 52.660 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 0.882 0.117 - - 3.01e-02 2.01e-03 32.470 57
CPL 0.519 0.468 244.4 0.0 4.29e-02 0.00e+00 30.730 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: 2.496000 sec.
T50 in the 50-300 keV band: 1.024000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 3.328 -0.216 3.112
T90 2.604 -0.108 2.496
T50 1.244 0.520 1.764
Peak 1.000 1.400 2.400
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
71.9229 -57.2611 0.0060 17.9410 129.4196 1.0189087 31.798 TRIG_00714404
Foreground time interval of the image:
-0.216 3.112 (delta_t = 3.328 [sec])
Background time interval of the image:
-214.527 -0.216 (delta_t = 214.311 [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 -0.216 sec. to 3.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14378 ( -0.0906799 0.090021 )
Norm@50keV : 1.94158E-02 ( -0.000983874 0.000983576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
# Reduced chi-squared = 0.9675 for 57 degrees of freedom
# Null hypothesis probability = 5.448757e-01
Photon flux (15-150 keV) in 3.328 sec: 2.26262 ( -0.118277 0.118426 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.66429e-07 ( -3.73804e-08 3.75239e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.216 sec. to 3.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.814474 ( -0.387799 0.35277 )
Epeak [keV] : 200.375 ( -79.1503 -200.375 )
Norm@50keV : 2.74860E-02 ( -0.0075989 0.0133417 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.66 using 59 PHA bins.
# Reduced chi-squared = 0.9403 for 56 degrees of freedom
# Null hypothesis probability = 6.021552e-01
Photon flux (15-150 keV) in 3.328 sec: 2.22736 ( -0.12429 0.12412 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.54015e-07 ( -4.04452e-08 4.01923e-08 ) ergs/cm2
Band function
Time interval is from -0.216 sec. to 3.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.770687 ( 0.770627 0.826165 )
beta : -1.43672 ( 1.43808 0.324195 )
Epeak [keV] : 177.485 ( -177.302 -177.302 )
Norm@50keV : 2.90326E-02 ( -0.00833327 2598.88 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.56 using 59 PHA bins.
# Reduced chi-squared = 0.9556 for 55 degrees of freedom
# Null hypothesis probability = 5.684755e-01
Photon flux (15-150 keV) in 3.328 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] : 19.8586 (-1.31376 1.44027)
R^2/D10^2 : 0.108034 (-0.0219617 0.0270513)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.10 using 59 PHA bins.
# Reduced chi-squared = 1.9315 for 57 degrees of freedom
# Null hypothesis probability = 3.101116e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.741e-08 2.666e-09
25- 50 1.359e-07 1.033e-08
50-150 3.969e-07 3.311e-08
15-150 5.602e-07 3.528e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.7909 -200)
Norm : 9.34860 (-0.485518 0.485518)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 109.03 using 59 PHA bins.
# Reduced chi-squared = 1.9128 for 57 degrees of freedom
# Null hypothesis probability = 4.078749e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.745e-08 4.360e-09
25- 50 1.490e-07 9.984e-09
50-150 3.268e-07 5.924e-08
15-150 5.532e-07 5.891e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.39779 (-1.92856 2.57854)
R1^2/D10^2 : 1.34426 (-0.779484 2.44195)
kT2 [keV] : 28.8879 (-4.39158 8.98012)
R2^2/D10^2 : 2.76363E-02 (-0.0166587 0.0216945)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.594729e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.379e-08 1.699e-08
25- 50 1.377e-07 2.824e-08
50-150 4.586e-07 8.330e-08
15-150 6.501e-07 1.057e-07
Peak spectrum fit
Power-law model
Time interval is from 1.400 sec. to 2.400 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.882427 ( -0.118197 0.11609 )
Norm@50keV : 3.00688E-02 ( -0.00201145 0.00200383 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.47 using 59 PHA bins.
# Reduced chi-squared = 0.5696 for 57 degrees of freedom
# Null hypothesis probability = 9.963408e-01
Photon flux (15-150 keV) in 1 sec: 3.45095 ( -0.230277 0.230558 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.3978e-07 ( -2.42778e-08 2.43698e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.400 sec. to 2.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.518936 ( -0.525085 0.410737 )
Epeak [keV] : 244.419 ( )
Norm@50keV : 4.29103E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.73 using 59 PHA bins.
# Reduced chi-squared = 0.5487 for 56 degrees of freedom
# Null hypothesis probability = 9.976129e-01
Photon flux (15-150 keV) in 1 sec: 3.39979 ( -0.23995 0.23948 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35096e-07 ( -2.5612e-08 2.5418e-08 ) ergs/cm2
Band function
Time interval is from 1.400 sec. to 2.400 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.811632 ( 0.811566 0.811566 )
beta : -0.886360 ( -0.112759 0.121646 )
Epeak [keV] : 15.6401 ( )
Norm@50keV : 4.36850E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.47 using 59 PHA bins.
# Reduced chi-squared = 0.5904 for 55 degrees of freedom
# Null hypothesis probability = 9.933274e-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] : 24.2642 (-2.1103 2.4146)
R^2/D10^2 : 9.45708E-02 (-0.0234896 0.0301626)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 0.9675 for 57 degrees of freedom
# Null hypothesis probability = 5.449845e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.824e-09 1.365e-09
25- 50 5.488e-08 5.250e-09
50-150 2.405e-07 2.490e-08
15-150 3.052e-07 2.770e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 13.6523 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 118.28 using 59 PHA bins.
# Reduced chi-squared = 2.0751 for 57 degrees of freedom
# Null hypothesis probability = 3.508087e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.400e-08 3.020e-09
25- 50 6.539e-08 9.635e-09
50-150 1.434e-07 5.064e-08
15-150 2.428e-07 6.200e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.84457 (-2.59988 4.28275)
R1^2/D10^2 : 1.94111 (-1.46116 9.40288)
kT2 [keV] : 31.0317 (-4.7542 11.0879)
R2^2/D10^2 : 4.11525E-02 (-0.0257578 0.0229678)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.26 using 59 PHA bins.
# Reduced chi-squared = 0.5683 for 55 degrees of freedom
# Null hypothesis probability = 9.958817e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.033e-08 8.564e-09
25- 50 5.666e-08 1.442e-08
50-150 2.575e-07 5.130e-08
15-150 3.345e-07 6.260e-08
Plot creation:
Sat Oct 1 10:22:53 EDT 2016