batgrbproduct analysis for trigger=767563
batgrbproduct Analysis for Trigger=767563
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): Sun Aug 13 10:34:46 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger767563
======================================================================
Trigger: 00767563 Segment: 000
BAT Trigger Time: 524279616 [s; MET]
Trigger Stop: 524279680 [s; MET]
UTC: 2017-08-13T01:13:16.481520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 201.05359481432 Dec: -5.46898251598156 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.29
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 12.29
Flight Position: [ source = BAT ]
RA: 201.05359481432 Dec: -5.46898251598156 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 201.057545818891 Dec: -5.53419816130504 [deg; J2000]
{ 13h 24m 13.8s , -05d 32' 03.1" }
+/- 3.26308299378819 [arcmin] (estimated 90% radius based on SNR)
+/- 1.85885121509621 [arcmin] (formal 1-sigma fit error)
SNR: 5.61518310973951
Angular difference between Flight and Ground position is 3.920047 arcmin
Partial Coding Fraction: 0.7109375 [ including projection effects ]
Duration
T90: 75.5079999566078 +/- 10.9253905864982
Measured from: -7.41600000858307
to: 68.0919999480247 [s; relative to TRIGTIME]
T50: 26.9119999408722 +/- 7.58189213443424
Measured from: 0.407999992370605
to: 27.3199999332428 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.63599997758865
to: 3.63599997758865 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.16399997472763
to: 78.8719999790192 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.611542 0.835600 0.865734 0.283508
0.067867 0.067616 0.060202 0.052302 [error]
Peak 0.017955 0.035248 0.038201 0.015387
0.007489 0.007572 0.007173 0.006032 [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 1.71e-07 3.84e-07 6.81e-07 2.84e-06 1.86e-06 4.07e-06 erg/cm2
Error 2.67e-08 3.53e-08 5.90e-08 5.74e-07 1.51e-07 6.02e-07 erg/cm2
Peak flux Power-law 1.91e-01 2.44e-01 2.28e-01 3.73e-01 7.88e-01 1.04e+00 ph/cm2/s
Error 8.90e-02 6.92e-02 5.73e-02 2.10e-01 1.86e-01 2.53e-01 ph/cm2/s
Fluence Cutoff-PL 1.68e-07 3.85e-07 6.85e-07 2.62e-06 1.85e-06 3.83e-06 erg/cm2
Error 3.18e-08 3.75e-08 6.58e-08 9.23e-07 1.58e-07 1.16e-06 erg/cm2
Peak flux Cutoff-PL 1.91e-01 2.44e-01 2.28e-01 3.70e-01 7.88e-01 1.03e+00 ph/cm2/s
Error 7.36e-02 7.61e-02 6.28e-02 2.49e-01 1.87e-01 3.14e-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 1.172 0.138 - - 2.06e-03 1.57e-04 68.050 57
CPL 1.081 0.364 528.4 0.0 2.27e-03 9.14e-04 68.070 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 1.100 0.415 - - 6.80e-03 1.55e-03 65.890 57
CPL 1.098 0.418 9999.4 0.0 6.83e-03 1.42e-02 65.890 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: 70.016000 sec.
T50 in the 50-300 keV band: 20.416000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 88.036 -9.164 78.872
T90 75.508 -7.416 68.092
T50 26.912 0.408 27.320
Peak 1.000 2.636 3.636
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
201.0575 -5.5342 0.0343 30.2140 -34.6071 2.9941048 5.615 TRIG_00767563
Foreground time interval of the image:
-9.164 72.901 (delta_t = 82.065 [sec])
Background time interval of the image:
-13.699 -9.164 (delta_t = 4.535 [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 -9.164 sec. to 78.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17231 ( -0.13942 0.136765 )
Norm@50keV : 2.06237E-03 ( -0.000157017 0.000156627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.05 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.499816e-01
Photon flux (15-150 keV) in 88.04 sec: 0.241179 ( -0.0192985 0.0193849 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85683e-06 ( -1.50908e-07 1.51774e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.164 sec. to 78.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08122 ( -0.54495 0.183749 )
Epeak [keV] : 528.441 ( -880.362 -880.362 )
Norm@50keV : 2.26789E-03 ( -0.000251816 0.00157662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.07 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 56 degrees of freedom
# Null hypothesis probability = 1.293282e-01
Photon flux (15-150 keV) in 88.04 sec: 0.240480 ( -0.020189 0.0198 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85208e-06 ( -1.60127e-07 1.55813e-07 ) ergs/cm2
Band function
Time interval is from -9.164 sec. to 78.872 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91055 ( -4.91055 -4.91055 )
beta : -1.19850 ( -0.147082 0.145811 )
Epeak [keV] : 23.3185 ( -23.3185 5.81941 )
Norm@50keV : 209.896 ( -15.8145 519380 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.43 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 55 degrees of freedom
# Null hypothesis probability = 1.213220e-01
Photon flux (15-150 keV) in 88.04 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] : 20.4855 (-2.10848 2.4613)
R^2/D10^2 : 1.01365E-02 (-0.00314527 0.00438968)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.66 using 59 PHA bins.
# Reduced chi-squared = 1.8361 for 57 degrees of freedom
# Null hypothesis probability = 1.225009e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.150e-08 1.170e-08
25- 50 3.618e-07 4.358e-08
50-150 1.129e-06 1.572e-07
15-150 1.562e-06 1.453e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-15.9772 -200)
Norm : 1.01572 (-0.0784856 0.0784856)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.65 using 59 PHA bins.
# Reduced chi-squared = 1.590 for 57 degrees of freedom
# Null hypothesis probability = 3.033981e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.228e-07 2.192e-08
25- 50 4.285e-07 7.228e-08
50-150 9.397e-07 3.284e-07
15-150 1.591e-06 4.019e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.86127 (-2.1618 2.61778)
R1^2/D10^2 : 0.139452 (-0.0821087 0.281893)
kT2 [keV] : 33.8605 (-7.45512 16.8944)
R2^2/D10^2 : 1.73712E-03 (-0.00121039 0.00125534)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.21 using 59 PHA bins.
# Reduced chi-squared = 1.240 for 55 degrees of freedom
# Null hypothesis probability = 1.086745e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.608e-07 6.395e-08
25- 50 3.939e-07 1.360e-07
50-150 1.312e-06 4.762e-07
15-150 1.866e-06 6.362e-07
Peak spectrum fit
Power-law model
Time interval is from 2.636 sec. to 3.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09976 ( -0.431243 0.399277 )
Norm@50keV : 6.79627E-03 ( -0.00155313 0.00154711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.89 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 57 degrees of freedom
# Null hypothesis probability = 1.964383e-01
Photon flux (15-150 keV) in 1 sec: 0.788308 ( -0.185365 0.186489 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.10635e-08 ( -1.74344e-08 1.7697e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.636 sec. to 3.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09803 ( -0.436298 0.399704 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 6.83116E-03 ( -0.00154464 0.0268909 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.89 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 56 degrees of freedom
# Null hypothesis probability = 1.719176e-01
Photon flux (15-150 keV) in 1 sec: 0.788437 ( -0.188072 0.185443 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09821e-08 ( -1.98165e-08 1.77023e-08 ) ergs/cm2
Band function
Time interval is from 2.636 sec. to 3.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96054 ( -4.96054 -4.96054 )
beta : -1.27031 ( -0.695213 0.503763 )
Epeak [keV] : 31.3953 ( -31.3953 14.7195 )
Norm@50keV : 132.343 ( -29.6384 2.16325e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.83 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 55 degrees of freedom
# Null hypothesis probability = 1.711906e-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] : 18.2155 (-4.87524 8.50645)
R^2/D10^2 : 4.94219E-02 (-0.0349483 0.0908551)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.93 using 59 PHA bins.
# Reduced chi-squared = 1.227 for 57 degrees of freedom
# Null hypothesis probability = 1.167399e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.271e-09 1.421e-09
25- 50 1.526e-08 6.868e-09
50-150 3.686e-08 1.972e-08
15-150 5.540e-08 2.469e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-79.6378 -200)
Norm : 3.27100 (-0.764794 0.764794)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.23 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 57 degrees of freedom
# Null hypothesis probability = 1.283414e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.149e-09 4.894e-09
25- 50 1.568e-08 9.355e-09
50-150 3.438e-08 2.009e-08
15-150 5.821e-08 3.470e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.27 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.06 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.05 using 59 PHA bins.
# Reduced chi-squared = 1.271 for 55 degrees of freedom
# Reduced chi-squared = 1.169 for 55 degrees of freedom
# Reduced chi-squared = 1.165 for 55 degrees of freedom
# Reduced chi-squared = 1.164 for 55 degrees of freedom
# Null hypothesis probability = 8.466919e-02
# Null hypothesis probability = 1.837553e-01
# Null hypothesis probability = 1.885504e-01
# Null hypothesis probability = 1.888545e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun Aug 13 14:42:54 EDT 2017