batgrbproduct analysis for trigger=1013243
batgrbproduct Analysis for Trigger=1013243
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): Thu Dec 17 19:18:27 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1013243/GCN5_download_cron
======================================================================
Trigger: 01013243 Segment: 000
BAT Trigger Time: 629852877.888 [s; MET]
Trigger Stop: 629852878.912 [s; MET]
UTC: 2020-12-16T23:07:31.722580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 16.3578584277706 Dec: 16.5367566216723 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.28
Image Trigger?: NO
Rate S/N Ratio: 69.3181073024935 [ if not an image trigger ]
Image S/N Ratio: 15.28
Flight Position: [ source = BAT ]
RA: 16.3578584277706 Dec: 16.5367566216723 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 16.3643731559951 Dec: 16.537891437702 [deg; J2000]
{ 01h 05m 27.4s , +16d 32' 16.4" }
+/- 0.840028430186233 [arcmin] (estimated 90% radius based on SNR)
+/- 0.350971417666289 [arcmin] (formal 1-sigma fit error)
SNR: 39.0184335820803
Angular difference between Flight and Ground position is 0.380851 arcmin
Partial Coding Fraction: 0.1855469 [ including projection effects ]
Duration
T90: 48 +/- 16
Measured from: -15.8879998922348
to: 32.1120001077652 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 0.112000107765198
to: 16.1120001077652 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 23.6119999885559
to: 24.6119999885559 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.8880000114441
to: 64.1119999885559 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 12.976018 21.326871 19.884765 7.030034
0.216053 0.248785 0.236107 0.185804 [error]
Peak 0.493013 0.714103 0.506268 0.175670
0.032028 0.037277 0.033539 0.024638 [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 5.63e-06 1.08e-05 1.60e-05 5.08e-05 4.51e-05 8.32e-05 erg/cm2
Error 2.08e-07 2.36e-07 2.76e-07 2.05e-06 7.30e-07 2.11e-06 erg/cm2
Peak flux Power-law 6.90e+00 6.05e+00 3.64e+00 3.30e+00 1.80e+01 1.99e+01 ph/cm2/s
Error 7.00e-01 3.84e-01 2.82e-01 5.11e-01 1.13e+00 1.19e+00 ph/cm2/s
Fluence Cutoff-PL 5.42e-06 1.08e-05 1.62e-05 4.46e-05 4.49e-05 7.70e-05 erg/cm2
Error 2.86e-07 2.40e-07 3.58e-07 4.85e-06 7.54e-07 4.85e-06 erg/cm2
Peak flux Cutoff-PL 6.52e+00 6.23e+00 3.76e+00 2.40e+00 1.78e+01 1.89e+01 ph/cm2/s
Error 8.49e-01 4.53e-01 3.26e-01 1.15e+00 1.17e+00 1.53e+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 1.433 0.030 - - 5.87e-02 9.94e-04 51.130 57
CPL 1.309 0.121 347.9 2663.0 6.59e-02 5.80e-03 48.110 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.733 0.103 - - 1.34e-01 8.31e-03 50.040 57
CPL 1.427 0.397 95.7 -32.5 1.91e-01 9.23e-02 48.390 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: 32.192000 sec.
T50 in the 50-300 keV band: 15.232000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 80.000 -15.888 64.112
T90 48.000 -15.888 32.112
T50 16.000 0.112 16.112
Peak 1.000 23.612 24.612
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
16.3644 +16.5379 0.0049 52.0 -21.6 65.7101 39.0 TRIG_01013243
------------------------------------------
Foreground time interval of the image:
-15.888 64.112 (delta_t = 80.000 [sec])
Background time interval of the image:
-64.787 -15.888 (delta_t = 48.899 [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 -15.888 sec. to 64.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43329 ( -0.0301113 0.0300256 )
Norm@50keV : 5.86993E-02 ( -0.000994843 0.000993466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.94e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 80 sec: 7.20439 ( -0.145896 0.146455 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.50777e-05 ( -7.30199e-07 7.30242e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.888 sec. to 64.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30937 ( -0.124264 0.118406 )
Epeak [keV] : 347.870 ( -141.674 5184.32 )
Norm@50keV : 6.59025E-02 ( -0.00369718 0.00790171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.11 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.64e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 80 sec: 7.12650 ( -0.16198 0.16313 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.49126e-05 ( -7.5416e-07 7.5312e-07 ) ergs/cm2
Band function
Time interval is from -15.888 sec. to 64.112 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.874822 ( -0.421549 1.48431 )
beta : -1.48871 ( -0.0613187 0.0506946 )
Epeak [keV] : 86.0846 ( -50.0204 164.289 )
Norm@50keV : 0.115955 ( -0.0472114 0.656192 )
------------------------------------------------------------
Photon flux (15-150 keV) in 80 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.0707 ( )
R^2/D10^2 : 0.295500 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 846.40 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.09e-141 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.833e-06 6.400e-08
25- 50 9.153e-06 2.520e-07
50-150 2.735e-05 5.880e-07
15-150 3.833e-05 6.520e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 30.7440 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 163.49 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.21e-12 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.124e-06 1.200e-07
25- 50 1.178e-05 2.320e-07
50-150 2.584e-05 5.320e-07
15-150 4.374e-05 8.040e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.12662 (-0.573042 0.598026)
R1^2/D10^2 : 2.87781 (-0.528577 0.685812)
kT2 [keV] : 35.0204 (-2.39579 2.96758)
R2^2/D10^2 : 3.50817E-02 (-0.0084624 0.00988207)
------------------------------------------------------------
#Fit statistic : Chi-Squared 62.07 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.39e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.247e-06 2.564e-07
25- 50 1.135e-05 3.320e-07
50-150 2.882e-05 1.012e-06
15-150 4.442e-05 1.216e-06
Peak spectrum fit
Power-law model
Time interval is from 23.612 sec. to 24.612 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73317 ( -0.102075 0.103784 )
Norm@50keV : 0.133985 ( -0.00832631 0.00829025 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 50.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.31e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 18.0060 ( -1.13283 1.13515 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2376e-06 ( -7.92542e-08 7.94503e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 23.612 sec. to 24.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42720 ( -0.439989 0.353318 )
Epeak [keV] : 95.7272 ( -30.7162 -95.729 )
Norm@50keV : 0.190742 ( -0.0617277 0.122868 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.55e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 17.7733 ( -1.1703 1.1726 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22036e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 23.612 sec. to 24.612 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.792439 ( -0.805262 3.25346 )
beta : -1.88733 ( 1.89162 0.192003 )
Epeak [keV] : 48.7879 ( -22.0445 125.913 )
Norm@50keV : 0.481052 ( -0.49898 98.1845 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21541e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5389 ( )
R^2/D10^2 : 2.81772 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 117.91 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.88e-06 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.094e-07 1.296e-08
25- 50 3.932e-07 2.890e-08
50-150 4.663e-07 5.430e-08
15-150 9.689e-07 7.350e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 133.419 (-29.6262 40.7465)
Norm : 75.0724 (-5.57309 6.62841)
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.63 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.77e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.918e-07 1.765e-08
25- 50 3.506e-07 3.045e-08
50-150 6.650e-07 2.028e-07
15-150 1.207e-06 2.411e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.82352 (-1.36312 1.40992)
R1^2/D10^2 : 14.8264 (-6.09556 13.1)
kT2 [keV] : 28.4825 (-6.07094 12.0167)
R2^2/D10^2 : 0.129466 (-0.0909511 0.199755)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.88 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.70e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.783e-07 3.350e-08
25- 50 3.738e-07 6.365e-08
50-150 6.634e-07 2.365e-07
15-150 1.216e-06 3.453e-07
Plot creation:
Thu Dec 17 19:22:55 EST 2020