batgrbproduct analysis for trigger=1009679
batgrbproduct Analysis for Trigger=1009679
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 Nov 29 12:28:24 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1009679/GCN5_download_cron
======================================================================
Trigger: 01009679 Segment: 000
BAT Trigger Time: 628237704.384 [s; MET]
Trigger Stop: 628237709.888 [s; MET]
UTC: 2020-11-28T06:27:58.325240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 223.135530064962 Dec: 26.6780005543733 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.45
Image Trigger?: NO
Rate S/N Ratio: 12.369316876853 [ if not an image trigger ]
Image S/N Ratio: 7.45
Flight Position: [ source = BAT ]
RA: 223.135530064962 Dec: 26.6780005543733 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 223.091317844743 Dec: 26.7162832416783 [deg; J2000]
{ 14h 52m 21.9s , +26d 42' 58.6" }
+/- 2.41198756940472 [arcmin] (estimated 90% radius based on SNR)
+/- 1.64937098816581 [arcmin] (formal 1-sigma fit error)
SNR: 8.64705630255358
Angular difference between Flight and Ground position is 3.300398 arcmin
Partial Coding Fraction: 0.921875 [ including projection effects ]
Duration
T90: 5.41199994087219 +/- 3.21968006987493
Measured from: -0.259999871253967
to: 5.15200006961823 [s; relative to TRIGTIME]
T50: 3.70000004768372 +/- 2.13743119625161
Measured from: 1.12000012397766
to: 4.82000017166138 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.20800006389618
to: 5.20800006389618 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.439999938011169
to: 8.73600006103516 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.079863 0.114688 0.080402 0.031534
0.019946 0.020656 0.018201 0.016198 [error]
Peak 0.013246 0.021471 0.018140 0.014874
0.006570 0.006795 0.005818 0.005349 [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 2.26e-08 4.52e-08 7.01e-08 2.39e-07 1.96e-07 3.77e-07 erg/cm2
Error 8.08e-09 9.55e-09 1.81e-08 1.41e-07 4.41e-08 1.53e-07 erg/cm2
Peak flux Power-law 1.23e-01 1.44e-01 1.21e-01 1.72e-01 4.49e-01 5.60e-01 ph/cm2/s
Error 8.13e-02 5.79e-02 4.77e-02 1.61e-01 1.55e-01 1.96e-01 ph/cm2/s
Fluence Cutoff-PL 2.28e-08 4.53e-08 6.99e-08 2.34e-07 1.95e-07 3.72e-07 erg/cm2
Error 8.08e-09 9.38e-09 1.81e-08 2.03e-07 4.37e-08 1.47e-07 erg/cm2
Peak flux Cutoff-PL 1.28e-01 1.46e-01 1.19e-01 1.63e-01 4.52e-01 5.58e-01 ph/cm2/s
Error 8.20e-02 5.89e-02 3.66e-02 1.91e-01 1.16e-01 2.12e-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 1.366 0.369 - - 2.19e-03 4.34e-04 49.610 57
CPL 2.616 0.982 194.9 0.0 4.53e-04 0.00e+00 48.680 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.248 0.667 - - 3.80e-03 1.26e-03 45.140 57
CPL 2.169 0.856 60.5 0.0 1.05e-03 1.30e-03 44.870 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 9.176 -0.440 8.736
T90 5.412 -0.260 5.152
T50 3.700 1.120 4.820
Peak 1.000 4.208 5.208
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
223.0913 +26.7163 0.0222 24.8 -171.9 0.3480 8.6 TRIG_01009679
------------------------------------------
Foreground time interval of the image:
-0.440 8.736 (delta_t = 9.176 [sec])
Background time interval of the image:
-239.384 -0.440 (delta_t = 238.944 [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 -0.440 sec. to 8.736 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36595 ( -0.372677 0.365605 )
Norm@50keV : 2.19158E-03 ( -0.000435988 0.00043221 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.46e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 9.176 sec: 0.264904 ( -0.0525662 0.0527284 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95718e-07 ( -4.365e-08 4.45178e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.440 sec. to 8.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.61562 ( -1.80545 0.15869 )
Epeak [keV] : 194.881 ( )
Norm@50keV : 4.53010E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 48.68 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.46e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 9.176 sec: 0.265661 ( -0.053555 0.052013 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95216e-07 ( -4.31391e-08 4.43164e-08 ) ergs/cm2
Band function
Time interval is from -0.440 sec. to 8.736 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.929288 ( 0.920661 0.920661 )
beta : -1.40580 ( 1.40756 0.410888 )
Epeak [keV] : 76.2788 ( -74.4832 -74.4832 )
Norm@50keV : 4.28611E-03 ( -0.0026847 208027 )
------------------------------------------------------------
Photon flux (15-150 keV) in 9.176 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] : 13.5050 (-3.71175 7.18704)
R^2/D10^2 : 4.19109E-02 (-0.0413438 0.0888122)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.30e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.486e-08 6.191e-09
25- 50 5.327e-08 1.927e-08
50-150 6.277e-08 2.806e-08
15-150 1.309e-07 5.356e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-92.9157 -199.363)
Norm : 1.08660 (-0.213552 0.213558)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.97e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.483e-08 1.446e-08
25- 50 4.776e-08 2.749e-08
50-150 1.047e-07 5.960e-08
15-150 1.773e-07 1.035e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.36025 (-2.35724 2.51756)
R1^2/D10^2 : 0.188602 (-0.12275 0.418258)
kT2 [keV] : 94.4576 (-63.3912 -94.4576)
R2^2/D10^2 : 1.58865E-04 (-0.000113098 0.00196443)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.99e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.339e-08 1.389e-08
25- 50 4.923e-08 2.830e-08
50-150 1.404e-07 9.630e-08
15-150 2.130e-07 1.549e-07
Peak spectrum fit
Power-law model
Time interval is from 4.208 sec. to 5.208 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24767 ( -0.705671 0.628207 )
Norm@50keV : 3.80022E-03 ( -0.00126029 0.00126019 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 45.14 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.72e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.449294 ( -0.154841 0.155501 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.80553e-08 ( -1.39007e-08 1.42509e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.208 sec. to 5.208 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16919 ( -1.09569 0.616953 )
Epeak [keV] : 60.5390 ( -9999.36 -9999.36 )
Norm@50keV : 1.04606E-03 ( -0.00104191 0.00156275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.87 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.57e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.451783 ( -0.07897 0.153137 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.81368e-08 ( -1.40909e-08 1.38629e-08 ) ergs/cm2
Band function
Time interval is from 4.208 sec. to 5.208 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97091 ( -4.97091 -4.97091 )
beta : -1.44933 ( -1.23749 0.828109 )
Epeak [keV] : 29.8318 ( -29.8318 40.052 )
Norm@50keV : 114.776 ( -37.7968 2.51777e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 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] : 17.7858 (-9.81355 34.5943)
R^2/D10^2 : 2.78451E-02 (-0.0261055 0.403546)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 49.87 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.37e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.770e-09 1.208e-09
25- 50 8.114e-09 5.250e-09
50-150 1.857e-08 1.249e-08
15-150 2.845e-08 1.819e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.86228 (-0.629764 0.629781)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.06 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.50e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.637e-09 2.941e-09
25- 50 8.920e-09 5.615e-09
50-150 1.956e-08 1.252e-08
15-150 3.312e-08 2.032e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.71945 (-3.15816 5.53719)
R1^2/D10^2 : 0.412085 (-0.357738 2.50304)
kT2 [keV] : 73.6086 (-50.3359 -72.979)
R2^2/D10^2 : 4.83753E-04 (-0.000402323 0.00990853)
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.75e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.527e-09 2.901e-09
25- 50 8.717e-09 5.175e-09
50-150 2.857e-08 1.691e-08
15-150 4.182e-08 2.150e-08
Plot creation:
Sun Nov 29 12:32:32 EST 2020