batgrbproduct analysis for trigger=999948
batgrbproduct Analysis for Trigger=999948
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): Wed Oct 14 03:22:21 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger999948/GCN5_download_cron
======================================================================
Trigger: 00999948 Segment: 000
BAT Trigger Time: 624253616.448 [s; MET]
Trigger Stop: 624253616.576 [s; MET]
UTC: 2020-10-13T03:46:30.651960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 107.387835387955 Dec: 57.0358898588483 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.37
Image Trigger?: NO
Rate S/N Ratio: 116.858889263932 [ if not an image trigger ]
Image S/N Ratio: 13.37
Flight Position: [ source = BAT ]
RA: 107.387835387955 Dec: 57.0358898588483 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 107.391777982337 Dec: 57.0312218401518 [deg; J2000]
{ 07h 09m 34.0s , +57d 01' 52.4" }
+/- 0.625141526012734 [arcmin] (estimated 90% radius based on SNR)
+/- 0.173997792635846 [arcmin] (formal 1-sigma fit error)
SNR: 59.5083463532804
Angular difference between Flight and Ground position is 0.308244 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 7.35599994659424 +/- 0.178392829650862
Measured from: -0.0519998073577881
to: 7.30400013923645 [s; relative to TRIGTIME]
T50: 5.39999997615814 +/- 0.0572713461980891
Measured from: 0.552000164985657
to: 5.9520001411438 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0479999780654907
to: 0.952000021934509 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.847999930381775
to: 9.6360000371933 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.036919 3.439999 3.271223 0.874855
0.042336 0.050970 0.049912 0.034426 [error]
Peak 0.529682 1.026607 1.218555 0.389010
0.018929 0.025333 0.028398 0.019962 [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 6.50e-07 1.42e-06 2.43e-06 9.60e-06 6.65e-06 1.41e-05 erg/cm2
Error 2.70e-08 3.46e-08 5.24e-08 4.83e-07 1.34e-07 5.05e-07 erg/cm2
Peak flux Power-law 5.07e+00 7.22e+00 7.63e+00 1.49e+01 2.46e+01 3.48e+01 ph/cm2/s
Error 2.93e-01 2.52e-01 2.25e-01 9.63e-01 6.86e-01 1.09e+00 ph/cm2/s
Fluence Cutoff-PL 5.84e-07 1.44e-06 2.53e-06 6.28e-06 6.55e-06 1.08e-05 erg/cm2
Error 3.61e-08 3.66e-08 6.57e-08 1.02e-06 1.42e-07 1.01e-06 erg/cm2
Peak flux Cutoff-PL 4.52e+00 7.32e+00 8.02e+00 1.05e+01 2.42e+01 3.04e+01 ph/cm2/s
Error 3.84e-01 2.67e-01 2.96e-01 1.84e+00 7.07e-01 1.97e+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 1.223 0.035 - - 6.30e-02 1.24e-03 0.000 0
CPL 0.850 0.151 184.6 58.2 9.05e-02 1.31e-02 0.000 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.919 0.048 - - 2.14e-01 5.94e-03 0.000 0
CPL 0.533 0.202 229.1 112.5 3.12e-01 6.04e-02 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: 7.040000 sec.
T50 in the 50-300 keV band: 5.312000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 10.484 -0.848 9.636
T90 7.356 -0.052 7.304
T50 5.400 0.552 5.952
Peak 1.000 -0.048 0.952
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
107.3918 +57.0312 0.0032 23.1 -76.1 9.5482 59.5 TRIG_00999948
------------------------------------------
Foreground time interval of the image:
-0.848 9.253 (delta_t = 10.101 [sec])
Background time interval of the image:
-239.448 -29.312 (delta_t = 210.136 [sec])
-28.448 -0.848 (delta_t = 27.600 [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 -0.848 sec. to 9.636 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22326 ( -0.0354859 0.0354074 )
Norm@50keV : 6.29609E-02 ( -0.00123992 0.00123905 )
------------------------------------------------------------
Photon flux (15-150 keV) in 10.48 sec: 7.41543 ( -0.158263 0.158559 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.65115e-06 ( -1.34435e-07 1.34414e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.848 sec. to 9.636 sec.
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.850180 ( -0.153955 0.149011 )
Epeak [keV] : 184.569 ( -36.5387 79.846 )
Norm@50keV : 9.05019E-02 ( -0.0119286 0.0141759 )
------------------------------------------------------------
Photon flux (15-150 keV) in 10.48 sec: 7.24057 ( -0.17009 0.17101 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.5537e-06 ( -1.41994e-07 1.41459e-07 ) ergs/cm2
Band function
Time interval is from -0.848 sec. to 9.636 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.831098 ( -0.167748 0.295356 )
beta : -1.61029 ( 1.61158 0.288506 )
Epeak [keV] : 175.969 ( -90.4516 87.4098 )
Norm@50keV : 9.25568E-02 ( -0.0139037 0.0830017 )
------------------------------------------------------------
Photon flux (15-150 keV) in 10.48 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] : 20.5943 ( )
R^2/D10^2 : 0.307187 ( )
(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 2.601e-07 1.079e-08
25- 50 1.321e-06 3.930e-08
50-150 4.167e-06 1.320e-07
15-150 5.747e-06 1.231e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 31.8218 ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.304e-07 1.871e-08
25- 50 1.597e-06 3.668e-08
50-150 3.503e-06 7.703e-08
15-150 5.931e-06 1.331e-07
Double BB
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.68098 (-0.845684 0.92091)
R1^2/D10^2 : 2.82749 (-0.727227 1.07269)
kT2 [keV] : 31.7616 (-2.37384 3.10697)
R2^2/D10^2 : 6.08872E-02 (-0.0169143 0.0193912)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.234e-07 4.742e-08
25- 50 1.469e-06 6.288e-08
50-150 4.556e-06 2.127e-07
15-150 6.547e-06 2.730e-07
Peak spectrum fit
Power-law model
Time interval is from -0.048 sec. to 0.952 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.919319 ( -0.0482279 0.0480364 )
Norm@50keV : 0.214128 ( -0.00593984 0.00593353 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 24.5831 ( -0.685535 0.685995 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38529e-06 ( -7.17056e-08 7.18319e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.048 sec. to 0.952 sec.
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.533062 ( -0.20621 0.197146 )
Epeak [keV] : 229.104 ( -58.6266 166.473 )
Norm@50keV : 0.312281 ( -0.0534266 0.0672841 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 24.2267 ( -0.7063 0.7067 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35721e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.048 sec. to 0.952 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99996 ( -7.48428e-06 -4.99996 )
beta : -0.950965 ( -0.0518056 0.0513245 )
Epeak [keV] : 27.9309 ( -10.2079 3.35417 )
Norm@50keV : 7004.50 ( -190.295 19546.9 )
------------------------------------------------------------
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] : 23.6837 ( )
R^2/D10^2 : 0.726214 ( )
(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 7.276e-08 3.805e-09
25- 50 4.012e-07 1.540e-08
50-150 1.678e-06 7.050e-08
15-150 2.153e-06 7.150e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 97.5583 ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.429e-07 7.150e-09
25- 50 4.673e-07 1.380e-08
50-150 1.025e-06 2.960e-08
15-150 1.735e-06 4.850e-08
Double BB
XSPEC12>/*
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.86830 (-1.3121 1.50935)
R1^2/D10^2 : 6.81375 (-2.37739 4.18655)
kT2 [keV] : 34.9335 (-3.35283 4.85794)
R2^2/D10^2 : 0.191224 (-0.0655167 0.0750748)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.366e-07 1.815e-08
25- 50 4.312e-07 3.550e-08
50-150 1.807e-06 1.370e-07
15-150 2.375e-06 1.760e-07
Plot creation:
Wed Oct 14 03:25:30 EDT 2020