batgrbproduct analysis for trigger=865036
batgrbproduct Analysis for Trigger=865036
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 3 13:09:13 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger865036/GCN5_download_cron
======================================================================
Trigger: 00865036 Segment: 000
BAT Trigger Time: 560172424.896 [s; MET]
Trigger Stop: 560172441.28 [s; MET]
UTC: 2018-10-02T11:26:43.208360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 64.7359539590011 Dec: 15.2332960680922 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.24
Image Trigger?: NO
Rate S/N Ratio: 7.54983443527075 [ if not an image trigger ]
Image S/N Ratio: 9.24
Flight Position: [ source = BAT ]
RA: 64.7359539590011 Dec: 15.2332960680922 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 64.7393368276437 Dec: 15.2476562337074 [deg; J2000]
{ 04h 18m 57.4s , +15d 14' 51.6" }
+/- 1.81317900222383 [arcmin] (estimated 90% radius based on SNR)
+/- 0.73684248526131 [arcmin] (formal 1-sigma fit error)
SNR: 12.9992233901764
Angular difference between Flight and Ground position is 0.883585 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 63.4079999923706 +/- 12.3613230133946
Measured from: -22.8719998598099
to: 40.5360001325607 [s; relative to TRIGTIME]
T50: 27.0879999399185 +/- 7.66198305220237
Measured from: -0.759999871253967
to: 26.3280000686646 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.3880000114441
to: 12.3880000114441 [s; relative to TRIGTIME]
Total Fluence
Measured from: -28.37600004673
to: 43.62399995327 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.682064 0.651374 0.312615 0.079163
0.066986 0.068988 0.059204 0.050881 [error]
Peak 0.028321 0.029706 0.012535 0.002161
0.008142 0.008156 0.006976 0.005932 [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 2.24e-07 2.77e-07 2.49e-07 3.88e-07 8.85e-07 1.14e-06 erg/cm2
Error 3.56e-08 3.32e-08 5.56e-08 1.69e-07 1.27e-07 2.35e-07 erg/cm2
Peak flux Power-law 2.96e-01 2.13e-01 1.01e-01 6.77e-02 6.42e-01 6.77e-01 ph/cm2/s
Error 1.28e-01 6.71e-02 5.64e-02 8.31e-02 1.99e-01 2.13e-01 ph/cm2/s
Fluence Cutoff-PL 2.19e-07 2.88e-07 2.45e-07 2.16e-07 8.58e-07 9.69e-07 erg/cm2
Error 3.88e-08 4.34e-08 6.07e-08 3.54e-07 1.42e-07 3.12e-07 erg/cm2
Peak flux Cutoff-PL 2.99e-01 2.12e-01 9.86e-02 6.32e-02 6.41e-01 6.75e-01 ph/cm2/s
Error 1.28e-01 7.41e-02 -------- -------- 1.99e-01 2.13e-01 ph/cm2/s
Fluence Band 2.18e-07 2.86e-07 2.45e-07 2.33e-07 8.60e-07 9.84e-07 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 2.154 0.234 - - 1.31e-03 2.12e-04 47.420 57
CPL 1.835 0.621 21.3 0.0 2.02e-03 0.00e+00 47.020 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.073 0.657 - - 4.13e-03 1.77e-03 64.020 57
CPL 1.994 0.000 7.7 0.0 4.42e-03 0.00e+00 64.060 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 72.000 -28.376 43.624
T90 63.408 -22.872 40.536
T50 27.088 -0.760 26.328
Peak 1.000 11.388 12.388
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
64.7393 +15.2477 0.0149 32.9 4.2 1.7527 13.0 TRIG_00865036
------------------------------------------
Foreground time interval of the image:
-28.376 43.624 (delta_t = 72.000 [sec])
Background time interval of the image:
-239.896 -28.376 (delta_t = 211.520 [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 -28.376 sec. to 43.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15357 ( -0.224876 0.243972 )
Norm@50keV : 1.31475E-03 ( -0.000215435 0.000209042 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.42 using 59 PHA bins.
# Reduced chi-squared = 0.8319 for 57 degrees of freedom
# Null hypothesis probability = 8.131844e-01
Photon flux (15-150 keV) in 72 sec: 0.212486 ( -0.024616 0.0246189 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.84642e-07 ( -1.24982e-07 1.28179e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -28.376 sec. to 43.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83537 ( -1.00157 0.241419 )
Epeak [keV] : 21.2850 ( )
Norm@50keV : 2.01870E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8396 for 56 degrees of freedom
# Null hypothesis probability = 7.981452e-01
Photon flux (15-150 keV) in 72 sec: 0.210085 ( -0.025377 0.025101 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.58406e-07 ( -1.38459e-07 1.4467e-07 ) ergs/cm2
Band function
Time interval is from -28.376 sec. to 43.624 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.83481 ( 1.88209 0.245856 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 21.3368 ( -11.51 -21.3368 )
Norm@50keV : 2.01918E-03 ( -0.000627954 0.00234635 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
# Reduced chi-squared = 0.8549 for 55 degrees of freedom
# Null hypothesis probability = 7.694319e-01
Photon flux (15-150 keV) in 72 sec: 0.210535 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.60342e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.33040 (-1.34942 1.53274)
R^2/D10^2 : 0.124965 (-0.0554991 0.104687)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.89 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 57 degrees of freedom
# Null hypothesis probability = 1.964264e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.552e-07 3.427e-08
25- 50 3.487e-07 5.285e-08
50-150 1.484e-07 5.177e-08
15-150 6.522e-07 1.068e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 54.0865 (-15.9389 24.6751)
Norm : 1.15076 (-0.208504 0.297923)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.86 using 59 PHA bins.
# Reduced chi-squared = 0.8396 for 57 degrees of freedom
# Null hypothesis probability = 8.005667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.060e-07 3.445e-08
25- 50 3.040e-07 8.442e-08
50-150 3.172e-07 1.907e-07
15-150 8.272e-07 2.927e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.92427 (-1.3119 1.76095)
R1^2/D10^2 : 2.81369 (-2.20807 6.91221)
kT2 [keV] : 14.4978 (-3.21471 5.74737)
R2^2/D10^2 : 1.78550E-02 (-0.0135147 0.0334681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.57 using 59 PHA bins.
# Reduced chi-squared = 0.8467 for 55 degrees of freedom
# Null hypothesis probability = 7.837496e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.247e-07 1.161e-07
25- 50 2.762e-07 1.130e-07
50-150 3.087e-07 1.793e-07
15-150 8.096e-07 3.790e-07
Peak spectrum fit
Power-law model
Time interval is from 11.388 sec. to 12.388 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07303 ( -0.586962 0.727123 )
Norm@50keV : 4.13207E-03 ( -0.00184603 0.00168777 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.02 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 57 degrees of freedom
# Null hypothesis probability = 2.437889e-01
Photon flux (15-150 keV) in 1 sec: 0.641563 ( -0.198804 0.198808 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.82973e-08 ( -1.4435e-08 1.53323e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.388 sec. to 12.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99365 ( )
Epeak [keV] : 7.71203 ( )
Norm@50keV : 4.42488E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.06 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 56 degrees of freedom
# Null hypothesis probability = 2.148287e-01
Photon flux (15-150 keV) in 1 sec: 0.641440 ( -0.198858 0.198731 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.83807e-08 ( -1.58996e-08 1.50692e-08 ) ergs/cm2
Band function
Time interval is from 11.388 sec. to 12.388 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.50251 ( 1.51164 1.51164 )
beta : -2.12662 ( 2.12677 0.640787 )
Epeak [keV] : 24.2811 ( -24.0683 -24.0683 )
Norm@50keV : 1.05311E-02 ( -0.00995126 1.90618e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.02 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 55 degrees of freedom
# Null hypothesis probability = 1.894030e-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] : 8.33066 (-2.74483 4.26887)
R^2/D10^2 : 0.592937 (-0.591536 2.31436)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.86 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 57 degrees of freedom
# Null hypothesis probability = 1.743766e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.656e-09 4.771e-09
25- 50 1.436e-08 8.985e-09
50-150 4.300e-09 3.530e-09
15-150 2.631e-08 1.726e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.8451 (-35.6928 -57.8627)
Norm : 3.40258 (-1.47289 3.28335)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.55 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 57 degrees of freedom
# Null hypothesis probability = 2.297593e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.499e-09 5.242e-09
25- 50 1.279e-08 7.664e-09
50-150 1.411e-08 1.120e-08
15-150 3.540e-08 2.184e-08
Double BB
# Reduced chi-squared = 1.158 for 55 degrees of freedom
# Reduced chi-squared = 1.157 for 55 degrees of freedom
# Reduced chi-squared = 1.157 for 55 degrees of freedom
# Null hypothesis probability = 1.934546e-01
# Null hypothesis probability = 1.942759e-01
# Null hypothesis probability = 1.948283e-01
# Null hypothesis probability = 1.953268e-01
# Null hypothesis probability = 1.957762e-01
# Null hypothesis probability = 1.961801e-01
# Null hypothesis probability = 1.965420e-01
# Null hypothesis probability = 1.973646e-01
# Null hypothesis probability = 1.982669e-01
# Null hypothesis probability = 1.987707e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.857e-09 5.310e-09
25- 50 1.235e-08 7.535e-09
50-150 1.961e-08 1.064e-08
15-150 4.082e-08 2.019e-08
Plot creation:
Wed Oct 3 13:12:52 EDT 2018