batgrbproduct analysis for trigger=999895
batgrbproduct Analysis for Trigger=999895
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 v2.48
Process Start Time (local time): Tue Oct 13 14:58:26 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger999895/GCN5_download_cron
======================================================================
Trigger: 00999895 Segment: 000
BAT Trigger Time: 624233208 [s; MET]
Trigger Stop: 624233296 [s; MET]
UTC: 2020-10-12T22:06:22.205300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.836007496934 Dec: -15.8161582437486 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.25
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.25
Flight Position: [ source = BAT ]
RA: 244.836007496934 Dec: -15.8161582437486 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.902764345539 Dec: -15.7043360706559 [deg; J2000]
{ 16h 19m 36.7s , -15d 42' 15.6" }
+/- 1.18438840407551 [arcmin] (estimated 90% radius based on SNR)
+/- 0.445475729305911 [arcmin] (formal 1-sigma fit error)
SNR: 23.8850822871311
Angular difference between Flight and Ground position is 7.737884 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 349.775999903679 +/- 68.2197527099543
Measured from: -116.407999873161
to: 233.368000030518 [s; relative to TRIGTIME]
T50: 197.203999996185 +/- 37.1357920326906
Measured from: -70.691999912262
to: 126.512000083923 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -40.2680000066757
to: -39.2680000066757 [s; relative to TRIGTIME]
Total Fluence
Measured from: -152.095999956131
to: 299.103999972343 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.942473 1.017397 -0.273937 -0.120658
0.192557 0.176087 0.149102 0.134322 [error]
Peak 0.021515 0.038198 0.003515 0.008182
0.009432 0.008752 0.007265 0.006470 [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 3.20e-06 4.82e-07 3.32e-08 2.44e-09 3.72e-06 3.72e-06 erg/cm2
Error 3.04e-07 8.24e-08 1.41e-08 1.78e-09 3.08e-07 3.08e-07 erg/cm2
Peak flux Power-law 3.14e-01 1.94e-01 7.66e-02 4.07e-02 6.05e-01 6.25e-01 ph/cm2/s
Error 1.36e-01 7.20e-02 5.13e-02 5.66e-02 2.10e-01 2.19e-01 ph/cm2/s
Fluence Cutoff-PL 3.17e-06 3.67e-07 1.27e-09 1.51e-14 3.54e-06 3.54e-06 erg/cm2
Error 3.28e-07 1.07e-07 6.53e-09 3.35e-11 3.39e-07 3.39e-07 erg/cm2
Peak flux Cutoff-PL 1.74e-01 3.03e-01 4.50e-02 1.08e-04 5.22e-01 5.23e-01 ph/cm2/s
Error 1.70e-01 1.18e-01 5.45e-02 1.10e-02 2.20e-01 2.20e-01 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 5.860 0.372 - - 7.62e-05 2.62e-05 0.000 0
CPL 0.977 0.000 4.5 0.0 6.88e-01 0.00e+00 0.000 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.338 0.730 - - 3.39e-03 1.77e-03 0.000 0
CPL -4.314 0.969 35.7 12.9 3.18e+01 7.98e+04 0.000 0
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 451.200 -152.096 299.104
T90 349.776 -116.408 233.368
T50 197.204 -70.692 126.512
Peak 1.000 -40.268 -39.268
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9028 -15.7043 0.0080 21.2 -52.3 13.6250 23.9 TRIG_00999895
------------------------------------------
Foreground time interval of the image:
-76.599 299.104 (delta_t = 375.703 [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
Time interval is from -152.096 sec. to 299.104 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.86006 ( -0.366723 0.377911 )
Norm@50keV : 7.61977E-05 ( -2.27578e-05 2.96267e-05 )
------------------------------------------------------------
Photon flux (15-150 keV) in 451.2 sec: 0.272583 ( -0.0243283 0.0244971 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.72056e-06 ( -3.07366e-07 3.08396e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -152.096 sec. to 299.104 sec.
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.977147 ( )
Epeak [keV] : 4.50200 ( )
Norm@50keV : 0.688340 ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 451.2 sec: 0.262474 ( -0.027353 0.026723 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.54313e-06 ( -3.42325e-07 3.35485e-07 ) ergs/cm2
Band function
Time interval is from -152.096 sec. to 299.104 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.56351 ( 5.85945 8.56351 )
beta : -5.89949 ( -0.348844 0.399295 )
Epeak [keV] : 282.124 ( -282.124 -282.124 )
Norm@50keV : 9.97524E-03 ( -0.00286727 0.00427036 )
------------------------------------------------------------
Photon flux (15-150 keV) in 451.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC12>exit
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 2.71909 (-0.189849 0.212227)
R^2/D10^2 : 70.1754 (-30.6933 54.4035)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.130e-06 5.482e-07
25- 50 3.193e-07 6.448e-08
50-150 2.220e-10 1.486e-10
15-150 3.449e-06 6.019e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.85465 (-0.495647 0.587707)
Norm : 67.8983 (-25.3523 41.0022)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.184e-06 5.473e-07
25- 50 3.762e-07 7.919e-08
50-150 1.677e-09 1.032e-09
15-150 3.562e-06 4.528e-07
Double BB
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.85968E-04 (0.000794129 -0.000185968)
R1^2/D10^2 : 5.54467E+04 (-55446.7 -55446.7)
kT2 [keV] : 2.71910 (-0.189859 0.212217)
R2^2/D10^2 : 70.1734 (-30.6912 54.4055)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.215e-06 6.809e-02
25- 50 5.935e-07 6.463e-01
50-150 3.794e-09 1.484e+01
15-150 2.812e-06 1.645e+01
Peak spectrum fit
Power-law model
Time interval is from -40.268 sec. to -39.268 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.33799 ( -0.629526 0.830245 )
Norm@50keV : 3.39108E-03 ( -0.0017824 0.00175048 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.605403 ( -0.209972 0.21003 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26419e-08 ( -1.33825e-08 1.47306e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -40.268 sec. to -39.268 sec.
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.31354 ( 2.74551 4.68251 )
Epeak [keV] : 35.6958 ( -16.7762 9.09653 )
Norm@50keV : 31.7550 ( -31.0275 159585 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.521627 ( -0.212847 0.227122 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67866e-08 ( -9.924e-09 1.13191e-08 ) ergs/cm2
Band function
Time interval is from -40.268 sec. to -39.268 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.68049 ( -5.9115 -4.68049 )
beta : -9.37167 ( 9.37167 19.3352 )
Epeak [keV] : 35.9629 ( -6.95935 7.57541 )
Norm@50keV : 50.2000 ( -16.2327 279.923 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC12>exit
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.79875 (-2.13505 2.72119)
R^2/D10^2 : 0.501831 (-0.501634 1.00343)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.473e-09 4.560e-09
25- 50 1.533e-08 9.530e-09
50-150 5.453e-09 4.149e-09
15-150 2.825e-08 1.795e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.1717 (-18.5442 59.8254)
Norm : 4.22622 (-1.99632 3.89007)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.455e-09 5.814e-09
25- 50 1.204e-08 7.470e-09
50-150 8.578e-09 6.715e-09
15-150 3.007e-08 1.853e-08
Double BB
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.242981 (-0.242578 3.63681)
R1^2/D10^2 : 4.92528E+21 (-5.38981e+21 -5.39052e+21)
kT2 [keV] : 9.23276 (-2.21016 2.94758)
R2^2/D10^2 : 0.394686 (-0.270192 0.766438)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.751e-09 3.994e-09
25- 50 1.442e-08 9.510e-09
50-150 6.223e-09 4.746e-09
15-150 2.839e-08 1.648e-08
Plot creation:
Tue Oct 13 15:01:43 EDT 2020