batgrbproduct analysis for trigger=819863
batgrbproduct Analysis for Trigger=819863
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 Mar 31 02:13:18 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger819863/GCN5_download_cron
======================================================================
Trigger: 00819863 Segment: 000
BAT Trigger Time: 544072162.944 [s; MET]
Trigger Stop: 544072163.968 [s; MET]
UTC: 2018-03-30T03:09:02.240100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 95.8031593997478 Dec: -64.9535690713503 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.55
Image Trigger?: NO
Rate S/N Ratio: 18 [ if not an image trigger ]
Image S/N Ratio: 6.55
Flight Position: [ source = BAT ]
RA: 95.8031593997478 Dec: -64.9535690713503 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 95.8753993194285 Dec: -64.8985649494135 [deg; J2000]
{ 06h 23m 30.1s , -64d 53' 54.8" }
+/- 3.43547065915156 [arcmin] (estimated 90% radius based on SNR)
+/- 2.26584549083222 [arcmin] (formal 1-sigma fit error)
SNR: 5.21703494835127
Angular difference between Flight and Ground position is 3.776995 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 1.02400004863739 +/-
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
T50: 1.02400004863739 +/-
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02400004863739 second)
Measured from: 5.96046447753906e-08
to: 1.02400010824203 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.002592 0.006551 0.041401 0.055970
0.008493 0.009266 0.009633 0.011641 [error]
Peak 0.002592 0.006551 0.041401 0.055970
0.008493 0.009266 0.009633 0.011641 [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 3.96e-10 3.27e-09 2.40e-08 9.95e-07 8.92e-08 1.02e-06 erg/cm2
Error 7.51e-10 3.69e-09 1.36e-08 7.67e-07 3.91e-08 7.61e-07 erg/cm2
Peak flux Power-law 1.19e-02 5.14e-02 1.89e-01 2.47e+00 5.49e-01 2.72e+00 ph/cm2/s
Error 2.29e-02 5.97e-02 1.37e-01 1.72e+00 2.71e-01 1.65e+00 ph/cm2/s
Fluence Cutoff-PL 1.39e-12 4.75e-10 2.81e-08 1.17e-07 9.75e-08 1.47e-07 erg/cm2
Error 4.63e-10 2.76e-09 1.35e-08 8.42e-07 2.99e-08 8.44e-07 erg/cm2
Peak flux Cutoff-PL 3.73e-05 6.41e-03 2.08e-01 5.02e-01 5.55e-01 7.18e-01 ph/cm2/s
Error 1.41e-02 4.41e-02 1.06e-01 -------- 1.60e-01 1.88e+00 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 -0.878 1.005 - - 2.65e-03 2.26e-03 47.540 57
CPL -9.331 -0.236 134.4 445.1 5.25e-02 7.36e-02 45.780 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.878 1.005 - - 2.65e-03 2.26e-03 47.540 57
CPL -9.331 -0.236 134.4 442.7 5.25e-02 7.36e-02 45.780 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: 1.152000 sec.
T50 in the 50-300 keV band: 0.512000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
95.8754 -64.8986 0.0367 24.7 -24.6 0.1080 5.2 TRIG_00819863
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.944 -34.704 (delta_t = 26.240 [sec])
-33.944 -10.944 (delta_t = 23.000 [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
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.877792 ( -1.15956 0.850303 )
Norm@50keV : 2.65353E-03 ( -0.00221129 0.00230788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8340 for 57 degrees of freedom
# Null hypothesis probability = 8.097502e-01
Photon flux (15-150 keV) in 1.024 sec: 0.548661 ( -0.345997 0.196743 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91564e-08 ( -5.16664e-08 2.66049e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.33102 ( 9.41166 8.93868 )
Epeak [keV] : 134.448 ( -24.2208 865.902 )
Norm@50keV : 5.24599E-02 ( -0.0630085 0.0841016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.78 using 59 PHA bins.
# Reduced chi-squared = 0.8175 for 56 degrees of freedom
# Null hypothesis probability = 8.333450e-01
Photon flux (15-150 keV) in 1.024 sec: 0.555304 ( -0.159271 0.161579 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75411e-08 ( -3.00424e-08 2.97042e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.440546 ( 0.44134 0.44134 )
beta : 0.877838 ( -0.850118 1.15975 )
Epeak [keV] : 11.7761 ( -11.7743 -11.7743 )
Norm@50keV : 5.08517E-03 ( -0.00508563 14564.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8644 for 55 degrees of freedom
# Null hypothesis probability = 7.523376e-01
Photon flux (15-150 keV) in 1.024 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] : 200.000 (-200 -200)
R^2/D10^2 : 3.19860E-04 (-9.39053e-05 -0.000319521)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8323 for 57 degrees of freedom
# Null hypothesis probability = 8.125538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.404e-10 4.180e-10
25- 50 4.369e-09 3.426e-09
50-150 8.640e-08 8.980e-08
15-150 9.131e-08 9.155e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-102.718 -200)
Norm : 1.64294 (-0.880084 0.880084)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.268266e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.191e-09 2.941e-09
25- 50 8.062e-09 5.852e-09
50-150 1.768e-08 1.233e-08
15-150 2.993e-08 2.070e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.61271 (-4.39912 -4.39912)
R1^2/D10^2 : 0.885138 (-0.900564 11.1536)
kT2 [keV] : 199.322 (-199.328 -199.328)
R2^2/D10^2 : 3.17177E-04 (-9.45664e-05 0.00209465)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8549 for 55 degrees of freedom
# Reduced chi-squared = 0.8544 for 55 degrees of freedom
# Null hypothesis probability = 7.692930e-01
# Null hypothesis probability = 7.702080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-09 1.048e-09
25- 50 4.419e-09 2.061e-09
50-150 8.576e-08 4.447e-08
15-150 9.197e-08 4.590e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.877792 ( -1.15956 0.850303 )
Norm@50keV : 2.65353E-03 ( -0.00221129 0.00230788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8340 for 57 degrees of freedom
# Null hypothesis probability = 8.097502e-01
Photon flux (15-150 keV) in 1.024 sec: 0.548661 ( -0.345997 0.196743 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91564e-08 ( -5.16664e-08 2.66049e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.33102 ( 9.41166 8.9387 )
Epeak [keV] : 134.448 ( -24.2208 861.254 )
Norm@50keV : 5.24599E-02 ( -0.0630085 0.0841016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.78 using 59 PHA bins.
# Reduced chi-squared = 0.8175 for 56 degrees of freedom
# Null hypothesis probability = 8.333450e-01
Photon flux (15-150 keV) in 1.024 sec: 0.555304 ( -0.159271 0.161579 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75411e-08 ( -3.00424e-08 2.97042e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.440546 ( 0.44134 0.44134 )
beta : 0.877838 ( -0.850118 1.15975 )
Epeak [keV] : 11.7761 ( -11.7743 -11.7743 )
Norm@50keV : 5.08517E-03 ( -0.00508563 14564.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8644 for 55 degrees of freedom
# Null hypothesis probability = 7.523376e-01
Photon flux (15-150 keV) in 1.024 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] : 200.000 (-200 -200)
R^2/D10^2 : 3.19860E-04 (-9.39053e-05 -0.000319521)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8323 for 57 degrees of freedom
# Null hypothesis probability = 8.125538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.404e-10 4.514e-10
25- 50 4.369e-09 3.568e-09
50-150 8.640e-08 8.945e-08
15-150 9.131e-08 9.411e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-102.718 -200)
Norm : 1.64294 (-0.880084 0.880084)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.268266e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.191e-09 3.101e-09
25- 50 8.062e-09 5.678e-09
50-150 1.768e-08 1.274e-08
15-150 2.993e-08 2.009e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.61271 (-4.39912 -4.39912)
R1^2/D10^2 : 0.885138 (-0.900564 11.1536)
kT2 [keV] : 199.322 (-199.328 -199.328)
R2^2/D10^2 : 3.17177E-04 (-9.45664e-05 0.00209465)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8549 for 55 degrees of freedom
# Reduced chi-squared = 0.8544 for 55 degrees of freedom
# Null hypothesis probability = 7.692930e-01
# Null hypothesis probability = 7.702080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-09 1.153e-09
25- 50 4.419e-09 2.045e-09
50-150 8.576e-08 4.368e-08
15-150 9.197e-08 3.494e-08
Plot creation:
Sat Mar 31 02:17:24 EDT 2018