batgrbproduct analysis for trigger=999571
batgrbproduct Analysis for Trigger=999571
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): Sun Oct 11 12:01:28 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger999571/batgroup_hand_proc
======================================================================
Trigger: 00999571 Segment: 000
BAT Trigger Time: 624034189.916 [s; MET]
Trigger Stop: 624034189.924 [s; MET]
UTC: 2020-10-10T14:49:24.134400 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 277.675224036808 Dec: -6.75850257801429 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.03
Image Trigger?: NO
Rate S/N Ratio: 23.259406699226 [ if not an image trigger ]
Image S/N Ratio: 7.03
Flight Position: [ source = BAT ]
RA: 277.675224036808 Dec: -6.75850257801429 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 277.696893397221 Dec: -6.76112260489708 [deg; J2000]
{ 18h 30m 47.3s , -06d 45' 40.0" }
+/- 2.94058338803704 [arcmin] (estimated 90% radius based on SNR)
+/- 1.28960072191481 [arcmin] (formal 1-sigma fit error)
SNR: 6.51519871664852
Angular difference between Flight and Ground position is 1.300658 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 0.00800001621246338 +/- 0.00894431669225064
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
T50: 0.00800001621246338 +/- 0.004
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.00800001621246338 second)
Measured from: 5.96046447753906e-08
to: 0.00800007581710815 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.005473 0.010481 0.001629 -0.000141
0.001719 0.001845 0.000919 0.000476 [error]
Peak 0.005473 0.010481 0.001629 -0.000141
0.001719 0.001845 0.000919 0.000476 [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 2.08e-09 2.47e-09 2.12e-09 3.10e-09 7.77e-09 9.77e-09 erg/cm2
Error 7.02e-10 7.08e-10 9.81e-10 2.61e-09 2.48e-09 4.05e-09 erg/cm2
Peak flux Power-law 8.51e+00 5.61e+00 2.41e+00 1.42e+00 1.72e+01 1.79e+01 ph/cm2/s
Error 2.92e+00 1.59e+00 1.08e+00 1.11e+00 4.78e+00 4.99e+00 ph/cm2/s
Fluence Cutoff-PL 1.51e-09 4.16e-09 1.29e-09 1.23e-11 6.98e-09 6.98e-09 erg/cm2
Error 1.23e-09 1.70e-09 1.49e-09 1.59e-09 2.37e-09 2.75e-09 erg/cm2
Peak flux Cutoff-PL 5.86e+00 9.33e+00 1.68e+00 8.92e-03 1.69e+01 1.69e+01 ph/cm2/s
Error 5.00e+00 3.84e+00 1.70e+00 7.47e-01 4.72e+00 4.73e+00 ph/cm2/s
Fluence Band 1.50e-09 4.03e-09 1.81e-09 7.45e-10 7.78e-09 8.11e-09 erg/cm2
Error -------- -------- 1.29e-09 -------- -------- -------- 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 2.221 0.470 - - 1.03e-01 3.72e-02 0.000 0
CPL -3.389 0.999 36.1 18.3 2.64e+02 2.00e+06 0.000 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.221 0.470 - - 1.03e-01 3.72e-02 0.000 0
CPL -3.389 0.999 36.1 18.3 2.64e+02 2.33e+06 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 0.008 0.000 0.008
T90 0.008 0.000 0.008
T50 0.008 0.000 0.008
Peak 0.008 0.000 0.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
277.6969 -6.7611 0.0295 20.9 -141.5 0.0179 6.5 TRIG_00999571
------------------------------------------
Foreground time interval of the image:
0.000 0.008 (delta_t = 0.008 [sec])
Background time interval of the image:
-239.916 -5.916 (delta_t = 234.000 [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 0.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.22059 ( -0.405365 0.535237 )
Norm@50keV : 0.102994 ( -0.0385387 0.035778 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: 17.2377 ( -4.77862 4.77879 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77008e-09 ( -2.46609e-09 2.4915e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.38876 ( 2.1241 4.12303 )
Epeak [keV] : 36.1133 ( -19.7809 16.7473 )
Norm@50keV : 263.510 ( -250.721 3.99324e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: 16.8740 ( -4.6816 4.7679 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.97788e-09 ( -2.01804e-09 2.71812e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.69916 ( -13.4667 -4.69916 )
beta : -3.65352 ( 3.65352 1.19117 )
Epeak [keV] : 34.2309 ( -5.963 6.26761 )
Norm@50keV : 2155.11 ( -570.24 13141.1 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77549e-09 ( 0 0 ) ergs/cm2
Single BB
XSPEC12>exit
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.30208 (-1.86046 2.24449)
R^2/D10^2 : 12.4181 (-7.28359 16.1071)
(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 1.701e-09 8.046e-10
25- 50 3.804e-09 1.700e-09
50-150 1.604e-09 1.125e-09
15-150 7.108e-09 2.807e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 51.6899 (-24.0234 51.8222)
Norm : 101.332 (-36.1633 56.4673)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.997e-09 7.424e-10
25- 50 2.902e-09 1.129e-09
50-150 2.906e-09 1.848e-09
15-150 7.804e-09 3.305e-09
Double BB
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.795247 (-0.79305 1.69632)
R1^2/D10^2 : 4.83960E+08 (-5.14863e+08 -5.14894e+08)
kT2 [keV] : 9.71922 (-1.9617 2.61262)
R2^2/D10^2 : 9.98237 (-6.25878 9.74632)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-09 9.460e-10
25- 50 3.586e-09 2.186e-09
50-150 1.769e-09 1.292e-09
15-150 7.146e-09 4.360e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.22059 ( -0.405365 0.535237 )
Norm@50keV : 0.102994 ( -0.0385387 0.035778 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: 17.2377 ( -4.77862 4.77879 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77008e-09 ( -2.46609e-09 2.4915e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.38876 ( 2.1241 4.12303 )
Epeak [keV] : 36.1133 ( -19.7809 16.7473 )
Norm@50keV : 263.510 ( -250.721 4.65348e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: 16.8740 ( -4.6816 4.7679 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.97788e-09 ( -2.01804e-09 2.71812e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.69916 ( -6.30985 -4.69916 )
beta : -3.65352 ( 3.65352 1.19117 )
Epeak [keV] : 34.2309 ( -5.963 6.26761 )
Norm@50keV : 2155.11 ( -570.24 13141.1 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77549e-09 ( 0 0 ) ergs/cm2
Single BB
XSPEC12>exit
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.30208 (-1.86046 2.24449)
R^2/D10^2 : 12.4181 (-7.28359 16.1071)
(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 1.701e-09 7.828e-10
25- 50 3.804e-09 1.688e-09
50-150 1.604e-09 1.088e-09
15-150 7.108e-09 3.134e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 51.6899 (-24.0234 51.8222)
Norm : 101.332 (-36.1633 56.4673)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.997e-09 7.248e-10
25- 50 2.902e-09 1.278e-09
50-150 2.906e-09 1.942e-09
15-150 7.804e-09 3.560e-09
Double BB
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.706983 (-0.70809 1.7053)
R1^2/D10^2 : 3.79226E+09 (-3.46577e+09 1.83892e+14)
kT2 [keV] : 9.69813 (-1.94888 2.55022)
R2^2/D10^2 : 10.0938 (-6.39886 8.74507)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-09 8.947e-10
25- 50 3.586e-09 2.202e-09
50-150 1.769e-09 1.335e-09
15-150 7.146e-09 4.228e-09
Plot creation:
Tue Oct 13 21:01:40 EDT 2020