batgrbproduct analysis for trigger=1014037
batgrbproduct Analysis for Trigger=1014037
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 Dec 22 17:09:28 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1014037/GCN5_download_cron
======================================================================
Trigger: 01014037 Segment: 000
BAT Trigger Time: 630284820.48 [s; MET]
Trigger Stop: 630284820.608 [s; MET]
UTC: 2020-12-21T23:06:34.286000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 171.049596287146 Dec: 42.1443187509267 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.97
Image Trigger?: NO
Rate S/N Ratio: 78.1216999303011 [ if not an image trigger ]
Image S/N Ratio: 13.97
Flight Position: [ source = BAT ]
RA: 171.049596287146 Dec: 42.1443187509267 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 171.054847291095 Dec: 42.1523260269335 [deg; J2000]
{ 11h 24m 13.2s , +42d 09' 08.4" }
+/- 1.31278586159422 [arcmin] (estimated 90% radius based on SNR)
+/- 0.495880222959436 [arcmin] (formal 1-sigma fit error)
SNR: 20.6191123263712
Angular difference between Flight and Ground position is 0.534213 arcmin
Partial Coding Fraction: 0.234375 [ including projection effects ]
Duration
T90: 0.159999966621399 +/- 0.0432665872684419
Measured from: -0.0199998617172241
to: 0.140000104904175 [s; relative to TRIGTIME]
T50: 0.0679999589920044 +/- 0.0144221847352656
Measured from: 0.0200001001358032
to: 0.0880000591278076 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.442000031471252
to: 0.557999968528748 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0559999942779541
to: 0.167999982833862 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.176909 0.237296 0.196492 0.049012
0.015698 0.017803 0.016672 0.010089 [error]
Peak 0.189695 0.249643 0.196550 0.041430
0.019480 0.021867 0.020279 0.014753 [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 5.56e-08 9.87e-08 1.34e-07 3.77e-07 3.89e-07 6.65e-07 erg/cm2
Error 7.28e-09 8.36e-09 1.47e-08 8.45e-08 3.60e-08 9.75e-08 erg/cm2
Peak flux Power-law 1.89e+00 1.87e+00 1.30e+00 1.42e+00 5.63e+00 6.48e+00 ph/cm2/s
Error 2.93e-01 1.86e-01 1.58e-01 3.42e-01 5.39e-01 6.22e-01 ph/cm2/s
Fluence Cutoff-PL 4.99e-08 1.06e-07 1.43e-07 1.71e-07 3.80e-07 4.70e-07 erg/cm2
Error 8.66e-09 1.04e-08 1.73e-08 -------- 3.73e-08 1.17e-07 erg/cm2
Peak flux Cutoff-PL 1.72e+00 1.98e+00 1.37e+00 8.23e-01 5.54e+00 5.89e+00 ph/cm2/s
Error 3.48e-01 2.24e-01 1.85e-01 5.15e-01 5.48e-01 7.69e-01 ph/cm2/s
Fluence Band 4.95e-08 1.05e-07 1.43e-07 1.76e-07 3.80e-07 4.75e-07 erg/cm2
Error 7.28e-09 1.01e-08 -------- -------- 3.71e-08 -------- erg/cm2
Peak flux Band 1.72e+00 1.96e+00 1.37e+00 8.85e-01 5.54e+00 5.94e+00 ph/cm2/s
Error 2.53e-01 -------- -------- -------- 5.43e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.557 0.134 - - 1.84e-01 1.58e-02 63.790 57
CPL 0.913 0.557 87.6 79.1 3.86e-01 2.63e-01 59.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.528 0.156 - - 4.47e-02 4.37e-03 67.400 57
CPL 0.994 0.639 95.9 -33.1 8.32e-02 6.88e-02 65.090 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: 0.192000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.224 -0.056 0.168
T90 0.160 -0.020 0.140
T50 0.068 0.020 0.088
Peak 1.000 -0.442 0.558
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
171.0548 +42.1523 0.0094 35.7 70.4 0.6893 20.6 TRIG_01014037
------------------------------------------
Foreground time interval of the image:
-0.056 0.168 (delta_t = 0.224 [sec])
Background time interval of the image:
-42.679 -0.056 (delta_t = 42.623 [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 -0.056 sec. to 0.168 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55700 ( -0.132826 0.135902 )
Norm@50keV : 0.184429 ( -0.0158433 0.0157522 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.79 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.50e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.224 sec: 23.3951 ( -1.95589 1.95723 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.88532e-07 ( -3.58805e-08 3.60595e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.056 sec. to 0.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.913372 ( -0.590371 0.524203 )
Epeak [keV] : 87.6369 ( -21.0967 137.018 )
Norm@50keV : 0.385606 ( -0.170657 0.35548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.27 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.57e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.224 sec: 22.9886 ( -1.9868 1.9863 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.79664e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.056 sec. to 0.168 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.914293 ( -0.495418 0.6169 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 87.6853 ( -21.1644 136.704 )
Norm@50keV : 0.385156 ( -0.170127 0.356358 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.224 sec: 23.0177 ( -16.0177 -1.9113 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.8024e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.4317 (-1.53067 1.6761)
R^2/D10^2 : 2.48489 (-0.753063 1.08666)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 88.95 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.32e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.761e-08 4.202e-09
25- 50 1.126e-07 1.127e-08
50-150 1.847e-07 3.149e-08
15-150 3.249e-07 3.270e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.073 (-64.8085 -198.129)
Norm : 96.1097 (-7.87631 8.56939)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.48 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.51e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.365e-08 5.712e-09
25- 50 1.031e-07 2.083e-08
50-150 2.257e-07 9.212e-08
15-150 3.825e-07 1.120e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.44373 (-1.4235 2.0135)
R1^2/D10^2 : 53.2753 (-36.0753 133.233)
kT2 [keV] : 21.3142 (-3.06868 4.54915)
R2^2/D10^2 : 0.670308 (-0.359469 0.549151)
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.17 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.95e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.310e-08 2.402e-08
25- 50 9.870e-08 2.638e-08
50-150 2.271e-07 5.925e-08
15-150 3.789e-07 8.732e-08
Peak spectrum fit
Power-law model
Time interval is from -0.442 sec. to 0.558 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52803 ( -0.154893 0.157909 )
Norm@50keV : 4.47301E-02 ( -0.00438649 0.00435917 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 67.40 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.63e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 5.62722 ( -0.538332 0.538724 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2246e-07 ( -4.48403e-08 4.51423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.442 sec. to 0.558 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.993702 ( -0.690334 0.588286 )
Epeak [keV] : 95.9282 ( -29.7982 -95.9282 )
Norm@50keV : 8.32186E-02 ( -0.0400752 0.0975632 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.09 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.90e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 5.53906 ( -0.54872 0.54825 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11675e-07 ( -4.7099e-08 4.715e-08 ) ergs/cm2
Band function
Time interval is from -0.442 sec. to 0.558 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.994077 ( -0.483936 0.6359 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 95.9504 ( -28.005 -95.9504 )
Norm@50keV : 8.31741E-02 ( -0.0400594 0.0978619 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 5.54475 ( 1.45525 -0.54484 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.12399e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1681 (-1.71584 1.93902)
R^2/D10^2 : 0.630781 (-0.217559 0.329111)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 88.09 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.16e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.033e-08 5.055e-09
25- 50 1.217e-07 1.515e-08
50-150 1.915e-07 3.550e-08
15-150 3.436e-07 4.005e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.336 (-66.2272 -199.352)
Norm : 23.1287 (-2.16991 2.17217)
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.68 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.01e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.759e-08 1.091e-08
25- 50 1.108e-07 2.916e-08
50-150 2.430e-07 1.133e-07
15-150 4.113e-07 1.408e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.65962 (-1.91789 3.0925)
R1^2/D10^2 : 11.0045 (-8.36748 48.7449)
kT2 [keV] : 21.7019 (-4.06099 8.645)
R2^2/D10^2 : 0.149353 (-0.109415 0.182257)
------------------------------------------------------------
#Fit statistic : Chi-Squared 65.33 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.61e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.596e-08 2.602e-08
25- 50 1.062e-07 3.353e-08
50-150 2.443e-07 9.200e-08
15-150 4.065e-07 1.245e-07
Plot creation:
Tue Dec 22 17:13:34 EST 2020