batgrbproduct analysis for trigger=939079
batgrbproduct Analysis for Trigger=939079
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 Nov 24 10:46:26 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger939079/GCN5_download_cron
======================================================================
Trigger: 00939079 Segment: 000
BAT Trigger Time: 596198348.288 [s; MET]
Trigger Stop: 596198349.312 [s; MET]
UTC: 2019-11-23T10:38:44.318720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 215.260938956595 Dec: 22.8416115021627 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.27
Image Trigger?: NO
Rate S/N Ratio: 12.1655250605964 [ if not an image trigger ]
Image S/N Ratio: 7.27
Flight Position: [ source = BAT ]
RA: 215.260938956595 Dec: 22.8416115021627 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 215.285078452452 Dec: 22.8280138439626 [deg; J2000]
{ 14h 21m 08.4s , +22d 49' 40.8" }
+/- 2.14532908935744 [arcmin] (estimated 90% radius based on SNR)
+/- 0.802821644334489 [arcmin] (formal 1-sigma fit error)
SNR: 10.2224650614286
Angular difference between Flight and Ground position is 1.564440 arcmin
Partial Coding Fraction: 0.859375 [ including projection effects ]
Duration
T90: 229.007999897003 +/- 55.8384048118795
Measured from: -1.0479998588562
to: 227.960000038147 [s; relative to TRIGTIME]
T50: 62.9919998645782 +/- 119.359553128598
Measured from: 89.6440001726151
to: 152.636000037193 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 111.784000039101
to: 112.784000039101 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.04799997806549
to: 335.968000054359 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.604065 0.903061 0.442028 0.135946
0.106861 0.110430 0.096817 0.086786 [error]
Peak 0.034050 0.063817 0.048172 0.012630
0.006423 0.006939 0.006414 0.005460 [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 1.97e-07 3.24e-07 4.03e-07 9.92e-07 1.20e-06 1.92e-06 erg/cm2
Error 4.31e-08 4.80e-08 9.22e-08 4.62e-07 2.18e-07 5.53e-07 erg/cm2
Peak flux Power-law 3.58e-01 4.02e-01 3.23e-01 4.31e-01 1.24e+00 1.51e+00 ph/cm2/s
Error 7.84e-02 5.49e-02 5.12e-02 1.41e-01 1.58e-01 2.05e-01 ph/cm2/s
Fluence Cutoff-PL 1.88e-07 3.54e-07 3.89e-07 3.00e-07 1.10e-06 1.23e-06 erg/cm2
Error 4.70e-08 7.23e-08 1.19e-07 5.72e-07 2.73e-07 7.67e-07 erg/cm2
Peak flux Cutoff-PL 3.35e-01 4.21e-01 3.33e-01 2.56e-01 1.22e+00 1.35e+00 ph/cm2/s
Error 9.04e-02 6.87e-02 5.70e-02 -------- 1.63e-01 2.91e-01 ph/cm2/s
Fluence Band 1.97e-07 4.24e-07 4.21e-07 7.31e-07 1.29e-06 1.75e-06 erg/cm2
Error 5.70e-08 8.34e-08 1.16e-07 -------- -------- -------- 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 1.686 0.262 - - 3.85e-04 6.53e-05 52.670 57
CPL 0.999 1.161 60.3 -14.4 9.69e-04 5.41e-03 51.710 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.315 0.216 - - 1.04e-02 1.33e-03 59.710 57
CPL 0.896 0.793 128.2 0.0 1.72e-02 0.00e+00 59.050 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: 114.944000 sec.
T50 in the 50-300 keV band: 70.272000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 339.016 -3.048 335.968
T90 229.008 -1.048 227.960
T50 62.992 89.644 152.636
Peak 1.000 111.784 112.784
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
215.2851 +22.8280 0.0187 17.6 -124.5 0.5620 10.2 TRIG_00939079
------------------------------------------
Foreground time interval of the image:
-3.048 15.613 (delta_t = 18.661 [sec])
Background time interval of the image:
-239.288 -3.048 (delta_t = 236.240 [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
-3.048000 252.272000
253.712000 335.968000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68623 ( -0.2569 0.267315 )
Norm@50keV : 3.84602E-04 ( -6.604e-05 6.45408e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9240 for 57 degrees of freedom
# Null hypothesis probability = 6.382405e-01
Photon flux (15-150 keV) in 337.6 sec: 5.08361E-02 ( -0.00752875 0.00752958 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20355e-06 ( -2.14548e-07 2.2103e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-3.048000 252.272000
253.712000 335.968000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.999301 ( -1.73352 0.587476 )
Epeak [keV] : 60.2844 ( -31.6339 -60.5268 )
Norm@50keV : 9.69106E-04 ( -0.000959406 0.00985091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.71 using 59 PHA bins.
# Reduced chi-squared = 0.9234 for 56 degrees of freedom
# Null hypothesis probability = 6.378844e-01
Photon flux (15-150 keV) in 337.6 sec: 4.95324E-02 ( -0.0079085 0.0078675 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10195e-06 ( -2.66333e-07 2.79884e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-3.048000 252.272000
253.712000 335.968000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.83439 ( -2.57529 -0.520355 )
beta : -2.08043 ( 2.10314 0.516344 )
Epeak [keV] : 32.9872 ( -16.5719 94.0929 )
Norm@50keV : 9.41561E-02 ( -0.0971478 10.3129 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.51 using 59 PHA bins.
# Reduced chi-squared = 0.9001 for 55 degrees of freedom
# Null hypothesis probability = 6.837610e-01
Photon flux (15-150 keV) in 337.6 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28721e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6411 (-1.64803 2.07274)
R^2/D10^2 : 1.95561E-02 (-0.00947743 0.0169575)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.68 using 59 PHA bins.
# Reduced chi-squared = 0.9944 for 57 degrees of freedom
# Null hypothesis probability = 4.870636e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.551e-07 4.439e-08
25- 50 4.198e-07 1.040e-07
50-150 2.616e-07 9.736e-08
15-150 8.365e-07 1.906e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 110.749 (-47.8926 -112.295)
Norm : 0.222808 (-0.0379095 0.0494056)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.80 using 59 PHA bins.
# Reduced chi-squared = 0.9087 for 57 degrees of freedom
# Null hypothesis probability = 6.700325e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.964e-07 4.564e-08
25- 50 3.464e-07 1.070e-07
50-150 5.934e-07 3.572e-07
15-150 1.136e-06 4.406e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.40577 (-2.28405 2.25669)
R1^2/D10^2 : 3.93447E-02 (-0.0172589 0.0565712)
kT2 [keV] : 44.2970 (-36.995 -55.6925)
R2^2/D10^2 : 8.30616E-05 (-4.39604e-05 0.00150954)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.53 using 59 PHA bins.
# Reduced chi-squared = 0.8823 for 55 degrees of freedom
# Null hypothesis probability = 7.187321e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.822e-07 9.239e-08
25- 50 3.806e-07 1.865e-07
50-150 6.010e-07 3.637e-07
15-150 1.164e-06 5.476e-07
Peak spectrum fit
Power-law model
Time interval is from 111.784 sec. to 112.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31549 ( -0.215921 0.216151 )
Norm@50keV : 1.03735E-02 ( -0.00133554 0.00132956 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.71 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.775666e-01
Photon flux (15-150 keV) in 1 sec: 1.24118 ( -0.157611 0.157706 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02128e-07 ( -1.48869e-08 1.51125e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 111.784 sec. to 112.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.895666 ( -1.05386 0.533018 )
Epeak [keV] : 128.164 ( -128.187 -128.187 )
Norm@50keV : 1.71602E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.05 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 56 degrees of freedom
# Null hypothesis probability = 3.646712e-01
Photon flux (15-150 keV) in 1 sec: 1.22174 ( -0.1637 0.16287 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.82586e-08 ( -1.73876e-08 1.71164e-08 ) ergs/cm2
Band function
Time interval is from 111.784 sec. to 112.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.29432 ( -0.844198 -0.844198 )
beta : -1.57927 ( -1.90335 0.337032 )
Epeak [keV] : 41.9403 ( -21.6503 130.631 )
Norm@50keV : 0.483777 ( -0.501688 92.3454 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.92 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.033231e-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] : 15.2850 (-2.38099 2.92325)
R^2/D10^2 : 0.137234 (-0.0614222 0.107173)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.46 using 59 PHA bins.
# Reduced chi-squared = 1.219 for 57 degrees of freedom
# Null hypothesis probability = 1.244158e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.691e-09 1.784e-09
25- 50 2.705e-08 4.995e-09
50-150 4.336e-08 1.151e-08
15-150 7.709e-08 1.356e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-54.2725 -200)
Norm : 5.08144 (-0.644568 0.644568)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.93 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.046544e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.265e-08 7.055e-09
25- 50 2.434e-08 1.353e-08
50-150 5.338e-08 2.968e-08
15-150 9.038e-08 4.951e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.15 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.57 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.27 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.23 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 55 degrees of freedom
# Reduced chi-squared = 1.047 for 55 degrees of freedom
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Null hypothesis probability = 3.602500e-01
# Null hypothesis probability = 3.803190e-01
# Null hypothesis probability = 3.908144e-01
# Null hypothesis probability = 3.921978e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.001e-08 5.785e-09
25- 50 2.482e-08 1.332e-08
50-150 5.788e-08 3.400e-08
15-150 9.270e-08 5.015e-08
Plot creation:
Sun Nov 24 10:49:58 EST 2019