batgrbproduct analysis for trigger=867343
batgrbproduct Analysis for Trigger=867343
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): Wed Oct 17 13:05:26 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger867343/GCN5_download_cron
======================================================================
Trigger: 00867343 Segment: 000
BAT Trigger Time: 561397237.248 [s; MET]
Trigger Stop: 561397237.28 [s; MET]
UTC: 2018-10-16T15:40:15.484300 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 272.129681485609 Dec: -20.3759663211205 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.8
Image Trigger?: NO
Rate S/N Ratio: 14.1774468787578 [ if not an image trigger ]
Image S/N Ratio: 7.8
Flight Position: [ source = BAT ]
RA: 272.129681485609 Dec: -20.3759663211205 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 272.112182263341 Dec: -20.409144133389 [deg; J2000]
{ 18h 08m 26.9s , -20d 24' 32.9" }
+/- 3.06282696754686 [arcmin] (estimated 90% radius based on SNR)
+/- 1.75774842221885 [arcmin] (formal 1-sigma fit error)
SNR: 6.1469222444489
Angular difference between Flight and Ground position is 2.220656 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 0.667999982833862 +/- 0.38931736800586
Measured from: -0.643999934196472
to: 0.0240000486373901 [s; relative to TRIGTIME]
T50: 0.431999921798706 +/- 0.343493816159047
Measured from: -0.611999869346619
to: -0.179999947547913 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.810000061988831
to: 0.189999938011169 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.656000018119812
to: 0.031999945640564 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.044647 0.034511 0.020997 0.001575
0.008568 0.009549 0.009325 0.009912 [error]
Peak 0.045597 0.044825 0.021403 0.008383
0.010214 0.011297 0.011154 0.011858 [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 1.25e-08 1.62e-08 1.54e-08 2.59e-08 5.28e-08 7.00e-08 erg/cm2
Error 3.93e-09 4.56e-09 8.58e-09 3.24e-08 1.93e-08 3.96e-08 erg/cm2
Peak flux Power-law 4.25e-01 3.28e-01 1.70e-01 1.27e-01 9.82e-01 1.05e+00 ph/cm2/s
Error 1.49e-01 9.10e-02 8.81e-02 1.28e-01 2.63e-01 3.03e-01 ph/cm2/s
Fluence Cutoff-PL 1.25e-08 1.62e-08 1.54e-08 1.97e-08 5.26e-08 6.20e-08 erg/cm2
Error 3.96e-09 5.26e-09 9.02e-09 2.26e-08 1.98e-08 4.16e-08 erg/cm2
Peak flux Cutoff-PL 4.09e-01 3.49e-01 1.68e-01 6.26e-02 9.66e-01 9.88e-01 ph/cm2/s
Error 1.68e-01 1.22e-01 9.86e-02 1.42e-01 2.68e-01 3.31e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 4.02e-01 3.55e-01 1.74e-01 6.28e-02 9.73e-01 9.95e-01 ph/cm2/s
Error -------- -------- 6.80e-02 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.075 0.581 - - 8.27e-03 3.34e-03 70.260 57
CPL 1.989 0.000 6.6 0.0 9.20e-03 0.00e+00 70.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.948 0.569 - - 6.70e-03 2.62e-03 54.710 57
CPL 1.461 0.000 45.2 0.0 1.30e-02 0.00e+00 54.560 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.688 -0.656 0.032
T90 0.668 -0.644 0.024
T50 0.432 -0.612 -0.180
Peak 1.000 -0.810 0.190
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
272.1122 -20.4091 0.0312 20.6 -163.1 0.1167 6.1 TRIG_00867343
------------------------------------------
Foreground time interval of the image:
-0.656 0.032 (delta_t = 0.688 [sec])
Background time interval of the image:
-60.248 -0.656 (delta_t = 59.592 [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 -0.656 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07486 ( -0.505363 0.655739 )
Norm@50keV : 8.27411E-03 ( -0.00346186 0.00322431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.26 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 57 degrees of freedom
# Null hypothesis probability = 1.116189e-01
Photon flux (15-150 keV) in 0.688 sec: 1.28581 ( -0.320865 0.322153 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.27688e-08 ( -1.83353e-08 2.03181e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.656 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98940 ( )
Epeak [keV] : 6.56436 ( )
Norm@50keV : 9.19597E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.27 using 59 PHA bins.
# Reduced chi-squared = 1.255 for 56 degrees of freedom
# Null hypothesis probability = 9.504393e-02
Photon flux (15-150 keV) in 0.688 sec: 1.28494 ( -0.322599 0.31989 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.2592e-08 ( -1.93038e-08 2.03237e-08 ) ergs/cm2
Band function
Time interval is from -0.656 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.61996 ( 6.61996 6.61996 )
beta : -2.07486 ( -0.655268 0.505252 )
Epeak [keV] : 10.4530 ( -10.453 -10.453 )
Norm@50keV : 1.12457 ( -0.470515 0.43823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.26 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 55 degrees of freedom
# Null hypothesis probability = 8.065020e-02
Photon flux (15-150 keV) in 0.688 sec: 1.30292 ( ) 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] : 9.27053 (-3.17757 4.02055)
R^2/D10^2 : 0.786267 (-0.563936 2.9752)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.77 using 59 PHA bins.
# Reduced chi-squared = 1.329 for 57 degrees of freedom
# Null hypothesis probability = 4.884726e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.184e-09 5.559e-09
25- 50 2.043e-08 1.033e-08
50-150 8.528e-09 5.965e-09
15-150 3.815e-08 2.080e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.2026 (-34.135 -60.2026)
Norm : 6.73824 (-2.23921 4.38038)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.77 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.038329e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.166e-08 5.598e-09
25- 50 1.776e-08 1.015e-08
50-150 2.027e-08 1.662e-08
15-150 4.968e-08 2.891e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.85389 (-1.80024 3.09878)
R1^2/D10^2 : 89.9322 (-86.9309 476272)
kT2 [keV] : 14.3803 (-5.3013 12.6432)
R2^2/D10^2 : 0.129543 (-0.114668 0.443252)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.08 using 59 PHA bins.
# Reduced chi-squared = 1.256 for 55 degrees of freedom
# Null hypothesis probability = 9.590730e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.231e-08 6.680e-09
25- 50 1.585e-08 9.054e-09
50-150 2.046e-08 1.450e-08
15-150 4.861e-08 2.668e-08
Peak spectrum fit
Power-law model
Time interval is from -0.810 sec. to 0.190 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94826 ( -0.504595 0.632781 )
Norm@50keV : 6.69801E-03 ( -0.00270743 0.0025327 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.71 using 59 PHA bins.
# Reduced chi-squared = 0.9598 for 57 degrees of freedom
# Null hypothesis probability = 5.614384e-01
Photon flux (15-150 keV) in 1 sec: 0.981540 ( -0.262078 0.263085 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.16366e-08 ( -2.20625e-08 2.43684e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.810 sec. to 0.190 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46143 ( )
Epeak [keV] : 45.1528 ( )
Norm@50keV : 1.29803E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.56 using 59 PHA bins.
# Reduced chi-squared = 0.9742 for 56 degrees of freedom
# Null hypothesis probability = 5.296862e-01
Photon flux (15-150 keV) in 1 sec: 0.966063 ( -0.265874 0.270077 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.83969e-08 ( -2.23697e-08 2.10391e-08 ) ergs/cm2
Band function
Time interval is from -0.810 sec. to 0.190 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.54275 ( -6.29918 5.38625 )
beta : -9.37137 ( 9.37163 19.3716 )
Epeak [keV] : 46.5785 ( -40.0638 -46.5735 )
Norm@50keV : 1.15843E-02 ( -0.00625641 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.56 using 59 PHA bins.
# Reduced chi-squared = 0.9920 for 55 degrees of freedom
# Null hypothesis probability = 4.913886e-01
Photon flux (15-150 keV) in 1 sec: 0.973365 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.83688e-08 ( -5.83618e-08 -2.20422e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.1528 (-2.88449 3.74883)
R^2/D10^2 : 0.444565 (-0.303824 1.05456)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.93 using 59 PHA bins.
# Reduced chi-squared = 0.9987 for 57 degrees of freedom
# Null hypothesis probability = 4.778664e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.380e-09 5.710e-09
25- 50 2.382e-08 1.318e-08
50-150 1.299e-08 9.765e-09
15-150 4.619e-08 2.748e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 69.9080 (-69.908 -69.908)
Norm : 4.85333 (-1.60066 2.86023)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.58 using 59 PHA bins.
# Reduced chi-squared = 0.9576 for 57 degrees of freedom
# Null hypothesis probability = 5.663301e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.245e-08 7.506e-09
25- 50 1.980e-08 1.184e-08
50-150 2.541e-08 2.162e-08
15-150 5.766e-08 3.848e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.26644 (-2.09899 5.29634)
R1^2/D10^2 : 219.261 (-218.43 -219.261)
kT2 [keV] : 12.4186 (-3.87324 15.1437)
R2^2/D10^2 : 0.188917 (-0.182008 0.348396)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.30 using 59 PHA bins.
# Reduced chi-squared = 0.9691 for 55 degrees of freedom
# Null hypothesis probability = 5.397399e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.189e-08 5.755e-09
25- 50 2.050e-08 1.224e-08
50-150 1.917e-08 1.321e-08
15-150 5.156e-08 2.924e-08
Plot creation:
Wed Oct 17 13:09:22 EDT 2018