batgrbproduct Analysis for Trigger=717500
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): Sat Oct 15 07:25:07 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger717500/batgroup_hand_proc
======================================================================
Trigger: 00717500 Segment: 000
BAT Trigger Time: 498141099.712 [s; MET]
Trigger Stop: 498141101.12 [s; MET]
UTC: 2016-10-14T12:31:22.705760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 332.628404737304 Dec: 7.48598860616531 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.79
Image Trigger?: NO
Rate S/N Ratio: 26.3818119165458 [ if not an image trigger ]
Image S/N Ratio: 6.79
Flight Position: [ source = BAT ]
RA: 332.628404737304 Dec: 7.48598860616531 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 332.625614639254 Dec: 7.46718087726354 [deg; J2000]
{ 22h 10m 30.1s , +07d 28' 01.9" }
+/- 1.51631838547849 [arcmin] (estimated 90% radius based on SNR)
+/- 0.569855078089699 [arcmin] (formal 1-sigma fit error)
SNR: 16.7821028653992
Angular difference between Flight and Ground position is 1.140605 arcmin
Partial Coding Fraction: 0.1347656 [ including projection effects ]
Duration
T90: 18.2999999523163 +/- 2.79556791249387
Measured from: -6.49599999189377
to: 11.8039999604225 [s; relative to TRIGTIME]
T50: 8.3079999089241 +/- 3.04117412964194
Measured from: -2.81599998474121
to: 5.49199992418289 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0999999642372131
to: 1.09999996423721 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.1360000371933
to: 12.4519999623299 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.695522 0.902919 0.883747 0.258395
0.080215 0.082576 0.074437 0.061503 [error]
Peak 0.068607 0.120570 0.142918 0.044363
0.018895 0.020817 0.021572 0.016114 [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 2.53e-07 4.74e-07 6.84e-07 2.10e-06 1.94e-06 3.51e-06 erg/cm2
Error 4.12e-08 4.64e-08 7.25e-08 4.89e-07 1.80e-07 5.34e-07 erg/cm2
Peak flux Power-law 9.84e-01 9.73e-01 6.74e-01 7.38e-01 2.93e+00 3.37e+00 ph/cm2/s
Error 3.06e-01 1.98e-01 1.62e-01 3.46e-01 5.73e-01 6.55e-01 ph/cm2/s
Fluence Cutoff-PL 2.45e-07 4.80e-07 6.96e-07 1.73e-06 1.93e-06 3.15e-06 erg/cm2
Error 3.80e-08 5.20e-08 8.38e-08 7.90e-07 1.87e-07 8.81e-07 erg/cm2
Peak flux Cutoff-PL 6.84e-01 1.09e+00 8.09e-01 2.52e-01 2.78e+00 2.84e+00 ph/cm2/s
Error 5.59e-01 2.43e-01 2.30e-01 -------- 6.06e-01 6.88e-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 1.470 0.153 - - 9.45e-03 8.23e-04 55.720 57
CPL 1.325 0.468 256.8 0.0 1.10e-02 7.06e-03 55.550 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 1.529 0.310 - - 2.32e-02 4.59e-03 75.800 57
CPL -0.078 2.061 70.3 378.4 1.33e-01 7.65e-01 72.960 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: 17.920000 sec.
T50 in the 50-300 keV band: 10.240000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 21.588 -9.136 12.452
T90 18.300 -6.496 11.804
T50 8.308 -2.816 5.492
Peak 1.000 0.100 1.100
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
332.6256 7.4672 0.0114 48.4955 156.9838 2.9125579 16.782 TRIG_00717500
Foreground time interval of the image:
-9.136 12.452 (delta_t = 21.588 [sec])
Background time interval of the image:
-768.111 -750.032 (delta_t = 18.079 [sec])
-239.712 -9.136 (delta_t = 230.576 [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 -9.136 sec. to 12.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46976 ( -0.152484 0.152527 )
Norm@50keV : 9.44732E-03 ( -0.000823684 0.000823273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.72 using 59 PHA bins.
# Reduced chi-squared = 0.9776 for 57 degrees of freedom
# Null hypothesis probability = 5.231266e-01
Photon flux (15-150 keV) in 21.59 sec: 1.17007 ( -0.109311 0.109898 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94489e-06 ( -1.79557e-07 1.80257e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.136 sec. to 12.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32476 ( -0.65183 0.283374 )
Epeak [keV] : 256.774 ( -256.596 -256.596 )
Norm@50keV : 1.10453E-02 ( -0.00341265 0.0107059 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.55 using 59 PHA bins.
# Reduced chi-squared = 0.9919 for 56 degrees of freedom
# Null hypothesis probability = 4.919207e-01
Photon flux (15-150 keV) in 21.59 sec: 1.16184 ( -0.11411 0.11406 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93427e-06 ( -1.87149e-07 1.85881e-07 ) ergs/cm2
Band function
Time interval is from -9.136 sec. to 12.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23260 ( 1.29695 1.38681 )
beta : -1.67262 ( 1.61733 0.294788 )
Epeak [keV] : 168.286 ( -228.401 -228.401 )
Norm@50keV : 1.21897E-02 ( -0.0019598 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.63 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.508131e-01
Photon flux (15-150 keV) in 21.59 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] : 17.3423 (-1.76706 2.02959)
R^2/D10^2 : 8.08173E-02 (-0.0261994 0.03738)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.31 using 59 PHA bins.
# Reduced chi-squared = 1.497 for 57 degrees of freedom
# Null hypothesis probability = 8.951823e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.063e-07 1.821e-08
25- 50 4.777e-07 6.326e-08
50-150 1.032e-06 1.526e-07
15-150 1.616e-06 1.690e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-41.2338 -200)
Norm : 4.84936 (-0.423053 0.423053)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.31 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.635957e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.607e-07 3.185e-08
25- 50 5.015e-07 6.984e-08
50-150 1.100e-06 4.839e-07
15-150 1.862e-06 5.381e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.73475 (-1.26935 2.27918)
R1^2/D10^2 : 5.00130 (-3.94276 16.82)
kT2 [keV] : 22.5043 (-3.29101 5.57164)
R2^2/D10^2 : 2.90318E-02 (-0.0162232 0.0228271)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.32 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Null hypothesis probability = 4.253545e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.682e-07 1.266e-07
25- 50 4.311e-07 9.802e-08
50-150 1.183e-06 2.699e-07
15-150 1.882e-06 4.334e-07
Peak spectrum fit
Power-law model
Time interval is from 0.100 sec. to 1.100 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52914 ( -0.301852 0.31875 )
Norm@50keV : 2.32438E-02 ( -0.00461087 0.00456748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.80 using 59 PHA bins.
# Reduced chi-squared = 1.330 for 57 degrees of freedom
# Null hypothesis probability = 4.862049e-02
Photon flux (15-150 keV) in 1 sec: 2.92509 ( -0.572197 0.573481 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19488e-07 ( -4.63885e-08 4.68502e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.100 sec. to 1.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -7.82192E-02 ( -2.51234 1.60929 )
Epeak [keV] : 70.3415 ( -16.1067 740.669 )
Norm@50keV : 0.132530 ( -0.132814 1.39671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.96 using 59 PHA bins.
# Reduced chi-squared = 1.303 for 56 degrees of freedom
# Null hypothesis probability = 6.351848e-02
Photon flux (15-150 keV) in 1 sec: 2.77548 ( -0.61139 0.60112 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11398e-07 ( -4.6505e-08 4.8028e-08 ) ergs/cm2
Band function
Time interval is from 0.100 sec. to 1.100 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.229874 ( -1.61963 2.74179 )
beta : -2.84711 ( 3.25263 11.2366 )
Epeak [keV] : 73.5855 ( -23.8057 223.935 )
Norm@50keV : 9.64715E-02 ( -0.056036 0.297979 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.02 using 59 PHA bins.
# Reduced chi-squared = 1.328 for 55 degrees of freedom
# Null hypothesis probability = 5.237728e-02
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] : 16.5218 (-2.71806 3.23251)
R^2/D10^2 : 0.261772 (-0.124361 0.224413)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.69 using 59 PHA bins.
# Reduced chi-squared = 1.293 for 57 degrees of freedom
# Null hypothesis probability = 6.765543e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.466e-08 5.541e-09
25- 50 6.339e-08 1.763e-08
50-150 1.224e-07 4.560e-08
15-150 2.004e-07 5.855e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-105.661 -199.363)
Norm : 12.1016 (-2.30525 2.569)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.77 using 59 PHA bins.
# Reduced chi-squared = 1.312 for 57 degrees of freedom
# Null hypothesis probability = 5.725178e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.013e-08 1.747e-08
25- 50 5.797e-08 3.348e-08
50-150 1.271e-07 7.245e-08
15-150 2.152e-07 1.248e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.06981 (-2.80356 3.6886)
R1^2/D10^2 : 75.8438 (-74.5746 -75.813)
kT2 [keV] : 18.0018 (-3.21453 4.44952)
R2^2/D10^2 : 0.181333 (-0.078348 0.10481)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.68 using 59 PHA bins.
# Reduced chi-squared = 1.267 for 55 degrees of freedom
# Null hypothesis probability = 8.793538e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.810e-08 1.399e-08
25- 50 5.699e-08 2.642e-08
50-150 1.280e-07 5.686e-08
15-150 2.131e-07 9.017e-08
Plot creation:
Sat Oct 15 07:37:52 EDT 2016