batgrbproduct analysis for trigger=814329
batgrbproduct Analysis for Trigger=814329
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): Fri Mar 16 09:33:52 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger814329/GCN5_download_cron
======================================================================
Trigger: 00814329 Segment: 000
BAT Trigger Time: 542765134.72 [s; MET]
Trigger Stop: 542765136.768 [s; MET]
UTC: 2018-03-15T00:05:14.095080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.07144888619 Dec: 7.19769698504676 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8
Image Trigger?: NO
Rate S/N Ratio: 10.6301458127346 [ if not an image trigger ]
Image S/N Ratio: 8
Flight Position: [ source = BAT ]
RA: 275.07144888619 Dec: 7.19769698504676 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 275.18923469792 Dec: 7.1796492319448 [deg; J2000]
{ 18h 20m 45.4s , +07d 10' 46.7" }
+/- 4.10249682293314 [arcmin] (estimated 90% radius based on SNR)
+/- 2.50083000352551 [arcmin] (formal 1-sigma fit error)
SNR: 4.04888238136599
Angular difference between Flight and Ground position is 7.094723 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 640 +/- 605.52126304532
Measured from: -175.719999909401
to: 464.280000090599 [s; relative to TRIGTIME]
T50: 160 +/- 973.242004847715
Measured from: -175.719999909401
to: -15.7199999094009 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.77999997138977
to: 8.77999997138977 [s; relative to TRIGTIME]
Total Fluence
Measured from: -175.72000002861
to: 928.27999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 13.300221 18.603763 13.152254 2.872571
0.284126 0.290581 0.247105 0.205667 [error]
Peak 0.017946 0.028835 0.006105 0.003580
0.008513 0.008727 0.007179 0.005854 [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 4.67e-06 7.95e-06 1.03e-05 2.71e-05 3.04e-05 5.00e-05 erg/cm2
Error 2.06e-07 2.02e-07 2.75e-07 1.66e-06 6.75e-07 1.79e-06 erg/cm2
Peak flux Power-law 1.92e-01 1.61e-01 9.15e-02 7.73e-02 4.78e-01 5.21e-01 ph/cm2/s
Error 1.14e-01 6.96e-02 5.60e-02 1.03e-01 2.07e-01 2.28e-01 ph/cm2/s
Fluence Cutoff-PL 4.26e-06 8.11e-06 1.06e-05 1.71e-05 2.96e-05 4.00e-05 erg/cm2
Error 2.68e-07 2.18e-07 3.09e-07 3.49e-06 7.66e-07 3.56e-06 erg/cm2
Peak flux Cutoff-PL 1.58e-01 2.26e-01 6.46e-02 1.69e-03 4.50e-01 4.50e-01 ph/cm2/s
Error 1.31e-01 8.33e-02 7.30e-02 7.42e-02 2.00e-01 2.01e-01 ph/cm2/s
Fluence Band 4.05e-06 8.23e-06 1.04e-05 2.32e-05 2.95e-05 4.59e-05 erg/cm2
Error 3.34e-07 2.63e-07 3.16e-07 -------- 7.54e-07 -------- erg/cm2
Peak flux Band 5.26e-01 6.36e-01 3.23e-01 5.91e-02 1.53e+00 1.54e+00 ph/cm2/s
Error 1.48e-01 1.08e-01 -------- -------- 2.31e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.624 0.041 - - 2.95e-03 6.38e-05 69.060 57
CPL 1.254 0.175 110.1 33.0 4.35e-03 7.90e-04 55.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.813 0.748 - - 3.45e-03 1.71e-03 79.240 57
CPL -1.173 5.506 39.6 0.0 2.39e-01 0.00e+00 77.660 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: 6.272000 sec.
T50 in the 50-300 keV band: 3.072000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1104.000 -175.720 928.280
T90 640.000 -175.720 464.280
T50 160.000 -175.720 -15.720
Peak 1.000 7.780 8.780
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
275.1892 +7.1796 0.0474 27.3 39.9 9.1611 4.0 TRIG_00814329
------------------------------------------
Foreground time interval of the image:
-175.720 611.460 (delta_t = 787.180 [sec])
612.280 928.280 (delta_t = 316.000 [sec])
Background time interval of the image:
-239.720 -175.720 (delta_t = 64.000 [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
-175.720000 611.460000
612.280000 928.280000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62360 ( -0.041468 0.0414822 )
Norm@50keV : 2.95067E-03 ( -6.38269e-05 6.38259e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.06 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 57 degrees of freedom
# Null hypothesis probability = 1.312946e-01
Photon flux (15-150 keV) in 1103 sec: 0.381999 ( -0.00956022 0.00959706 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03537e-05 ( -6.74612e-07 6.75054e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-175.720000 611.460000
612.280000 928.280000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25402 ( -0.178311 0.171576 )
Epeak [keV] : 110.086 ( -19.0788 46.9941 )
Norm@50keV : 4.35481E-03 ( -0.000703423 0.000876013 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 0.9823 for 56 degrees of freedom
# Null hypothesis probability = 5.123703e-01
Photon flux (15-150 keV) in 1103 sec: 0.370232 ( -0.010761 0.010827 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.95812e-05 ( -7.67136e-07 7.64048e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-175.720000 611.460000
612.280000 928.280000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.888895 ( -0.493156 1.12141 )
beta : -1.78454 ( 1.78384 0.101348 )
Epeak [keV] : 67.5064 ( -26.6131 63.6427 )
Norm@50keV : 7.12950E-03 ( -0.00333219 0.0343144 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.33 using 59 PHA bins.
# Reduced chi-squared = 0.9696 for 55 degrees of freedom
# Null hypothesis probability = 5.387458e-01
Photon flux (15-150 keV) in 1103 sec: 0.366206 ( 6.63379 -0.011432 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.95279e-05 ( -2.95201e-05 -7.5368e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.7977 ( )
R^2/D10^2 : 3.34651E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 434.94 using 59 PHA bins.
# Reduced chi-squared = 7.6305 for 57 degrees of freedom
# Null hypothesis probability = 1.357880e-59
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.910e-06 8.272e-08
25- 50 7.949e-06 2.327e-07
50-150 1.380e-05 5.405e-07
15-150 2.366e-05 5.791e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 182.308 (-21.1629 -182.018)
Norm : 1.53313 (-0.0398244 0.0436476)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.82 using 59 PHA bins.
# Reduced chi-squared = 0.9617 for 57 degrees of freedom
# Null hypothesis probability = 5.574180e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.258e-06 2.101e-07
25- 50 8.103e-06 4.638e-07
50-150 1.724e-05 3.708e-06
15-150 2.960e-05 4.098e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.94328 (-0.65104 0.675344)
R1^2/D10^2 : 0.253915 (-0.0593278 0.0847881)
kT2 [keV] : 27.4291 (-2.314 2.94798)
R2^2/D10^2 : 3.55523E-03 (-0.00112181 0.00142732)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.668610e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.665e-06 2.791e-07
25- 50 8.383e-06 4.098e-07
50-150 1.722e-05 1.070e-06
15-150 2.927e-05 1.390e-06
Peak spectrum fit
Power-law model
Time interval is from 7.780 sec. to 8.780 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81275 ( -0.706953 0.790039 )
Norm@50keV : 3.45036E-03 ( -0.00174377 0.00167923 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.24 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 57 degrees of freedom
# Null hypothesis probability = 2.736063e-02
Photon flux (15-150 keV) in 1 sec: 0.477809 ( -0.207035 0.207365 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17597e-08 ( -1.53211e-08 1.6447e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.780 sec. to 8.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.17296 ( -7.64159 3.36946 )
Epeak [keV] : 39.5926 ( )
Norm@50keV : 0.238958 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.66 using 59 PHA bins.
# Reduced chi-squared = 1.387 for 56 degrees of freedom
# Null hypothesis probability = 2.930469e-02
Photon flux (15-150 keV) in 1 sec: 0.450227 ( -0.196659 0.203434 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45681e-08 ( -1.10563e-08 1.09216e-08 ) ergs/cm2
Band function
Time interval is from 7.780 sec. to 8.780 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.22928 ( -4.18155 -4.18155 )
beta : -2.39388 ( 5.38178 15.2066 )
Epeak [keV] : 28.2160 ( -27.4593 65.6735 )
Norm@50keV : 78.7221 ( -78.5951 51.3154 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.32 using 59 PHA bins.
# Reduced chi-squared = 1.406 for 55 degrees of freedom
# Null hypothesis probability = 2.525813e-02
Photon flux (15-150 keV) in 1 sec: 1.53456 ( 5.46544 -0.23431 ) 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] : 10.0869 (-3.30564 5.07278)
R^2/D10^2 : 0.242649 (-0.242649 0.827598)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.66 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.583067e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.043e-09 3.339e-09
25- 50 1.269e-08 8.010e-09
50-150 6.791e-09 5.705e-09
15-150 2.452e-08 1.566e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 76.3897 (-76.3897 -76.3897)
Norm : 2.34380 (-1.15216 2.205)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.68 using 59 PHA bins.
# Reduced chi-squared = 1.380 for 57 degrees of freedom
# Null hypothesis probability = 3.010013e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.062e-09 3.886e-09
25- 50 9.866e-09 6.490e-09
50-150 1.349e-08 1.340e-08
15-150 2.942e-08 2.082e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 2.80187E-05 (-2.80127e-05 -2.80127e-05)
kT2 [keV] : 9.45278 (-2.70263 5.10097)
R2^2/D10^2 : 0.294553 (-0.237723 0.635477)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.65 using 59 PHA bins.
#Fit statistic : Chi-Squared = 77.21 using 59 PHA bins.
# Reduced chi-squared = 1.412 for 55 degrees of freedom
# Reduced chi-squared = 1.404 for 55 degrees of freedom
# Null hypothesis probability = 2.380570e-02
# Null hypothesis probability = 2.575326e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.075e-09 1.137e-05
25- 50 1.267e-08 1.311e-04
50-150 6.922e-09 2.846e-03
15-150 2.466e-08 2.926e-03
Plot creation:
Fri Mar 16 09:39:24 EDT 2018