batgrbproduct analysis for trigger=1011980
batgrbproduct Analysis for Trigger=1011980
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 10 06:41:24 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1011980/GCN5_download_cron
======================================================================
Trigger: 01011980 Segment: 000
BAT Trigger Time: 629185518.656 [s; MET]
Trigger Stop: 629185519.68 [s; MET]
UTC: 2020-12-09T05:44:52.534720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 23.1056567215306 Dec: -1.76338021356593 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.19
Image Trigger?: NO
Rate S/N Ratio: 43.2434966208793 [ if not an image trigger ]
Image S/N Ratio: 10.19
Flight Position: [ source = BAT ]
RA: 23.1056567215306 Dec: -1.76338021356593 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 23.0964664794627 Dec: -1.76263824567428 [deg; J2000]
{ 01h 32m 23.2s , -01d 45' 45.5" }
+/- 1.13178871592081 [arcmin] (estimated 90% radius based on SNR)
+/- 0.364314915455133 [arcmin] (formal 1-sigma fit error)
SNR: 25.4865307744728
Angular difference between Flight and Ground position is 0.552948 arcmin
Partial Coding Fraction: 0.1142578 [ including projection effects ]
Duration
T90: 48 +/- 16
Measured from: -31.6559998989105
to: 16.3440001010895 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: -15.6559998989105
to: 0.344000101089478 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.84399998188019
to: 8.84399998188019 [s; relative to TRIGTIME]
Total Fluence
Measured from: -31.6560000181198
to: 32.3439999818802 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.469627 7.598613 5.844412 1.865525
0.220434 0.234086 0.200903 0.162602 [error]
Peak 0.275118 0.531310 0.406697 0.143839
0.034184 0.043236 0.039209 0.028442 [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 1.99e-06 3.52e-06 4.76e-06 1.33e-05 1.38e-05 2.36e-05 erg/cm2
Error 1.36e-07 1.44e-07 2.00e-07 1.23e-06 5.04e-07 1.34e-06 erg/cm2
Peak flux Power-law 4.01e+00 4.04e+00 2.87e+00 3.23e+00 1.22e+01 1.41e+01 ph/cm2/s
Error 6.33e-01 4.03e-01 3.08e-01 6.96e-01 1.15e+00 1.28e+00 ph/cm2/s
Fluence Cutoff-PL 1.86e-06 3.60e-06 4.91e-06 9.16e-06 1.36e-05 1.95e-05 erg/cm2
Error 1.68e-07 1.62e-07 2.33e-07 2.83e-06 5.31e-07 2.82e-06 erg/cm2
Peak flux Cutoff-PL 3.79e+00 4.15e+00 2.97e+00 2.44e+00 1.21e+01 1.34e+01 ph/cm2/s
Error 7.70e-01 4.77e-01 3.87e-01 1.26e+00 1.17e+00 1.77e+00 ph/cm2/s
Fluence Band 1.67e-06 3.77e-06 4.77e-06 1.15e-05 1.35e-05 2.17e-05 erg/cm2
Error 1.98e-07 2.08e-07 2.11e-07 -------- 5.24e-07 -------- 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 1.561 0.062 - - 2.29e-02 8.15e-04 84.290 57
CPL 1.267 0.252 136.1 187.2 3.15e-02 8.48e-03 80.040 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.496 0.148 - - 9.77e-02 8.86e-03 53.320 57
CPL 1.217 0.502 150.4 -38.9 1.34e-01 9.66e-02 52.740 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: 33.024000 sec.
T50 in the 50-300 keV band: 10.368000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 -31.656 32.344
T90 48.000 -31.656 16.344
T50 16.000 -15.656 0.344
Peak 1.000 7.844 8.844
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
23.0965 -1.7626 0.0075 50.8 169.3 18.2587 25.5 TRIG_01011980
------------------------------------------
Foreground time interval of the image:
-31.656 11.345 (delta_t = 43.001 [sec])
Background time interval of the image:
-199.455 -88.816 (delta_t = 110.639 [sec])
-87.656 -31.656 (delta_t = 56.000 [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 -31.656 sec. to 32.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56148 ( -0.062208 0.0620936 )
Norm@50keV : 2.29459E-02 ( -0.00081496 0.000814959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 84.29 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.09e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 64 sec: 2.91455 ( -0.11651 0.116899 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38028e-05 ( -5.03354e-07 5.03671e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.656 sec. to 32.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26722 ( -0.258784 0.244679 )
Epeak [keV] : 136.118 ( -39.5159 334.791 )
Norm@50keV : 3.15060E-02 ( -0.00713964 0.0098199 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 80.04 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.92e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 64 sec: 2.86586 ( -0.12246 0.12295 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36195e-05 ( -5.32096e-07 5.29984e-07 ) ergs/cm2
Band function
Time interval is from -31.656 sec. to 32.344 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.237511 ( -2.23093 -1.29737 )
beta : -1.70723 ( -0.165251 0.0920836 )
Epeak [keV] : 44.0978 ( -16.039 28.1076 )
Norm@50keV : 0.283969 ( -0.277832 460.111 )
------------------------------------------------------------
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35023e-05 ( -1.35018e-05 -5.24032e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.1831 ( )
R^2/D10^2 : 0.245959 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 258.61 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.81e-27 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.502e-07 6.304e-08
25- 50 3.612e-06 1.770e-07
50-150 6.641e-06 3.955e-07
15-150 1.110e-05 4.448e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-23.9765 -200)
Norm : 11.8816 (-0.421645 0.421645)
------------------------------------------------------------
#Fit statistic : Chi-Squared 80.19 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.31e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.894e-06 7.392e-08
25- 50 3.644e-06 1.504e-07
50-150 7.992e-06 3.168e-07
15-150 1.353e-05 5.664e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.67500 (-0.890443 0.951017)
R1^2/D10^2 : 1.57923 (-0.443542 0.666641)
kT2 [keV] : 33.0123 (-4.71885 7.37876)
R2^2/D10^2 : 1.47814E-02 (-0.00720272 0.0109016)
------------------------------------------------------------
#Fit statistic : Chi-Squared 72.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.97e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.603e-06 1.933e-07
25- 50 3.881e-06 3.296e-07
50-150 8.153e-06 1.276e-06
15-150 1.364e-05 1.478e-06
Peak spectrum fit
Power-law model
Time interval is from 7.844 sec. to 8.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49627 ( -0.146982 0.148374 )
Norm@50keV : 9.77097E-02 ( -0.00886982 0.0088474 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.32 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.14e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 12.1858 ( -1.1489 1.1509 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.27488e-07 ( -8.94277e-08 8.96185e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.844 sec. to 8.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21705 ( -0.687425 0.31565 )
Epeak [keV] : 150.396 ( -72.6943 -150.414 )
Norm@50keV : 0.133679 ( -0.0434446 0.149854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.74 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.99e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 12.0964 ( -1.1651 1.1672 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.20602e-07 ( -9.2131e-08 9.1608e-08 ) ergs/cm2
Band function
Time interval is from 7.844 sec. to 8.844 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.704876 ( 0.825982 0.825982 )
beta : -1.66876 ( 1.66201 0.276942 )
Epeak [keV] : 69.1184 ( -69.3589 287.758 )
Norm@50keV : 0.269195 ( -0.266406 9.14427e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28317e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.9506 (-1.62581 1.83222)
R^2/D10^2 : 1.16476 (-0.37654 0.540237)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 79.94 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.42e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.131e-08 9.985e-09
25- 50 2.573e-07 3.090e-08
50-150 4.571e-07 7.640e-08
15-150 7.757e-07 8.615e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-47.5588 -200)
Norm : 50.2743 (-4.5427 4.5427)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.06e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.257e-07 1.405e-08
25- 50 2.419e-07 3.145e-08
50-150 5.305e-07 2.115e-07
15-150 8.981e-07 2.296e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.80002 (-3.43785 3.26737)
R1^2/D10^2 : 4.59515 (-2.5095 11.4868)
kT2 [keV] : 39.9211 (-17.9458 -40.6788)
R2^2/D10^2 : 3.37511E-02 (-0.0300651 0.139996)
------------------------------------------------------------
#Fit statistic : Chi-Squared 54.54 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.92e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.618e-08 2.958e-08
25- 50 2.629e-07 8.050e-08
50-150 5.579e-07 2.739e-07
15-150 9.170e-07 3.386e-07
Plot creation:
Thu Dec 10 06:45:21 EST 2020