batgrbproduct analysis for trigger=954304
batgrbproduct Analysis for Trigger=954304
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): Thu Feb 6 16:27:24 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger954304/GCN5_download_cron
======================================================================
Trigger: 00954304 Segment: 000
BAT Trigger Time: 602577376 [s; MET]
Trigger Stop: 602577440 [s; MET]
UTC: 2020-02-05T06:35:51.617920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 130.171013589059 Dec: -35.2445838144734 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.69
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.69
Flight Position: [ source = BAT ]
RA: 130.171013589059 Dec: -35.2445838144734 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 130.168311361874 Dec: -35.2752479427948 [deg; J2000]
{ 08h 40m 40.4s , -35d 16' 30.9" }
+/- 2.97851498857351 [arcmin] (estimated 90% radius based on SNR)
+/- 1.86902530274864 [arcmin] (formal 1-sigma fit error)
SNR: 6.39699222650481
Angular difference between Flight and Ground position is 1.844605 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 198.827999949455 +/- 17.0049234909028
Measured from: -74.3319998979568
to: 124.496000051498 [s; relative to TRIGTIME]
T50: 97.691999912262 +/- 16.2620241193459
Measured from: -23.6199998855591
to: 74.0720000267029 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -81.8980000019073
to: -80.8980000019073 [s; relative to TRIGTIME]
Total Fluence
Measured from: -81.8880000114441
to: 132.868000030518 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.205080 1.202305 0.407533 0.026625
0.076781 0.078201 0.069403 0.064422 [error]
Peak 0.009490 0.016223 0.012633 0.008078
0.008332 0.008571 0.007734 0.007333 [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 3.91e-07 4.54e-07 3.79e-07 5.33e-07 1.42e-06 1.76e-06 erg/cm2
Error 4.27e-08 3.83e-08 6.12e-08 1.65e-07 1.39e-07 2.41e-07 erg/cm2
Peak flux Power-law 1.27e-01 1.13e-01 6.93e-02 6.43e-02 3.37e-01 3.75e-01 ph/cm2/s
Error 1.05e-01 9.02e-02 5.78e-02 1.17e-01 1.99e-01 2.28e-01 ph/cm2/s
Fluence Cutoff-PL 3.51e-07 5.21e-07 3.21e-07 6.69e-08 1.25e-06 1.26e-06 erg/cm2
Error 4.92e-08 5.39e-08 7.97e-08 9.85e-08 1.46e-07 1.72e-07 erg/cm2
Peak flux Cutoff-PL 8.47e-02 1.40e-01 7.89e-02 1.04e-02 3.13e-01 3.14e-01 ph/cm2/s
Error 1.14e-01 9.21e-02 7.25e-02 1.01e-01 2.04e-01 2.05e-01 ph/cm2/s
Fluence Band 3.48e-07 5.19e-07 3.20e-07 6.66e-08 1.25e-06 1.26e-06 erg/cm2
Error 4.54e-08 5.25e-08 7.78e-08 -------- 1.43e-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 2.260 0.166 - - 7.01e-04 8.18e-05 77.170 57
CPL 0.841 0.911 31.5 8.4 4.97e-03 1.02e-02 67.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.709 1.216 - - 2.53e-03 2.10e-03 48.550 57
CPL 0.031 1.619 54.6 0.0 1.87e-02 4.20e+03 47.990 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 214.756 -81.888 132.868
T90 198.828 -74.332 124.496
T50 97.692 -23.620 74.072
Peak 1.000 -81.898 -80.898
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
130.1683 -35.2752 0.0302 23.2 -26.3 1.2154 6.4 TRIG_00954304
------------------------------------------
Foreground time interval of the image:
-14.799 14.930 (delta_t = 29.729 [sec])
16.000 72.101 (delta_t = 56.101 [sec])
Background time interval of the image:
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
-81.888000 -49.844800
-49.000000 14.930000
16.000000 132.868000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.25997 ( -0.161858 0.170985 )
Norm@50keV : 7.00872E-04 ( -8.2307e-05 8.12681e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.17 using 59 PHA bins.
# Reduced chi-squared = 1.354 for 57 degrees of freedom
# Null hypothesis probability = 3.882133e-02
Photon flux (15-150 keV) in 212.8 sec: 0.119815 ( -0.00967505 0.00967715 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41528e-06 ( -1.378e-07 1.41072e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-81.888000 -49.844800
-49.000000 14.930000
16.000000 132.868000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.841040 ( -1.0027 0.819021 )
Epeak [keV] : 31.4707 ( -11.1506 5.66126 )
Norm@50keV : 4.96623E-03 ( -0.00496619 0.0153501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.17 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 56 degrees of freedom
# Null hypothesis probability = 1.457291e-01
Photon flux (15-150 keV) in 212.8 sec: 0.113259 ( -0.010128 0.010185 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24869e-06 ( -1.39031e-07 1.5381e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-81.888000 -49.844800
-49.000000 14.930000
16.000000 132.868000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.840984 ( -0.577177 1.34237 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 31.4636 ( -11.1478 5.56395 )
Norm@50keV : 4.96676E-03 ( -0.00496676 0.0153699 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.17 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.256287e-01
Photon flux (15-150 keV) in 212.8 sec: 0.113558 ( 6.88644 -0.010274 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24653e-06 ( -1.24504e-06 -1.38116e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.79062 (-0.742049 0.808172)
R^2/D10^2 : 8.98344E-02 (-0.0265864 0.037989)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.66 using 59 PHA bins.
# Reduced chi-squared = 1.398 for 57 degrees of freedom
# Null hypothesis probability = 2.541253e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.840e-07 3.501e-08
25- 50 5.816e-07 5.394e-08
50-150 2.063e-07 4.788e-08
15-150 1.072e-06 1.047e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.6330 (-8.22008 11.2963)
Norm : 0.731199 (-0.105353 0.126829)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.10 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 57 degrees of freedom
# Null hypothesis probability = 1.490008e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.672e-07 3.969e-08
25- 50 5.009e-07 4.448e-08
50-150 4.251e-07 1.028e-07
15-150 1.293e-06 1.452e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.67431 (-2.41596 2.69021)
R1^2/D10^2 : 1.50278 (-1.32598 4620.2)
kT2 [keV] : 11.0165 (-2.01152 4.67442)
R2^2/D10^2 : 3.06503E-02 (-0.026022 0.0510446)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.09 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 55 degrees of freedom
# Null hypothesis probability = 1.270962e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.552e-07 1.706e-07
25- 50 5.221e-07 2.214e-07
50-150 3.221e-07 1.291e-07
15-150 1.199e-06 4.481e-07
Peak spectrum fit
Power-law model
Time interval is from -81.898 sec. to -80.898 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70872 ( -1.02976 1.40216 )
Norm@50keV : 2.53322E-03 ( -0.00253272 0.00166129 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.55 using 59 PHA bins.
# Reduced chi-squared = 0.8518 for 57 degrees of freedom
# Null hypothesis probability = 7.796530e-01
Photon flux (15-150 keV) in 1 sec: 0.337471 ( -0.199261 0.199442 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.34318e-08 ( -1.54911e-08 1.71948e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -81.898 sec. to -80.898 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.05325E-02 ( 0.404013 3.64185 )
Epeak [keV] : 54.6161 ( -53.9758 -53.9758 )
Norm@50keV : 1.86883E-02 ( -0.0373793 8407.27 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8570 for 56 degrees of freedom
# Null hypothesis probability = 7.679839e-01
Photon flux (15-150 keV) in 1 sec: 0.312639 ( -0.200666 0.20723 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.09867e-08 ( -1.31693e-08 1.73551e-08 ) ergs/cm2
Band function
Time interval is from -81.898 sec. to -80.898 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.414149 ( -2.28453 -0.284527 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 54.3515 ( -29.1183 185.577 )
Norm@50keV : 3.22167E-02 ( -0.0205919 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.92 using 59 PHA bins.
# Reduced chi-squared = 0.8712 for 55 degrees of freedom
# Null hypothesis probability = 7.397251e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.29961e-09 ( -6.29261e-09 -2.02537e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.4930 (-6.26173 11.8276)
R^2/D10^2 : 5.94967E-02 (-0.0594967 0.460342)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.91 using 59 PHA bins.
# Reduced chi-squared = 0.8405 for 57 degrees of freedom
# Null hypothesis probability = 7.990059e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.294e-09 1.585e-09
25- 50 8.220e-09 5.565e-09
50-150 9.663e-09 8.105e-09
15-150 2.018e-08 1.387e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 102.880 (-106.133 -106.133)
Norm : 1.52231 (-0.912101 2.00241)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.30 using 59 PHA bins.
# Reduced chi-squared = 0.8474 for 57 degrees of freedom
# Null hypothesis probability = 7.872849e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.979e-09 2.548e-09
25- 50 6.919e-09 4.880e-09
50-150 1.139e-08 1.034e-08
15-150 2.229e-08 1.674e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00060E-04 (1.39833e-07 -0.00010006)
R1^2/D10^2 : 498.392 (-498.391 -498.391)
kT2 [keV] : 13.4929 (-6.26171 11.8276)
R2^2/D10^2 : 5.94970E-02 (-0.059497 0.460345)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.91 using 59 PHA bins.
# Reduced chi-squared = 0.8730 for 55 degrees of freedom
# Reduced chi-squared = 0.8711 for 55 degrees of freedom
# Null hypothesis probability = 7.363198e-01
# Null hypothesis probability = 7.399556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.926e-09 1.370e-09
25- 50 7.664e-09 5.195e-09
50-150 1.181e-08 9.000e-09
15-150 2.140e-08 1.620e-08
Plot creation:
Thu Feb 6 16:30:38 EST 2020