batgrbproduct analysis for trigger=1017711
batgrbproduct Analysis for Trigger=1017711
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 Jan 19 11:33:47 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1017711/batgroup_hand_proc
======================================================================
Trigger: 01017711 Segment: 000
BAT Trigger Time: 632717676.152 [s; MET]
Trigger Stop: 632717676.184 [s; MET]
UTC: 2021-01-19T02:54:09.797180 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 282.804265797649 Dec: -61.8007488114657 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.02
Image Trigger?: NO
Rate S/N Ratio: 49.3659801887899 [ if not an image trigger ]
Image S/N Ratio: 12.02
Flight Position: [ source = BAT ]
RA: 282.804265797649 Dec: -61.8007488114657 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 282.822328933751 Dec: -61.7665733995358 [deg; J2000]
{ 18h 51m 17.4s , -61d 45' 59.7" }
+/- 1.50176461218237 [arcmin] (estimated 90% radius based on SNR)
+/- 0.48372823800027 [arcmin] (formal 1-sigma fit error)
SNR: 17.0149234487392
Angular difference between Flight and Ground position is 2.113581 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/- 0.020396072630595
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0279999971389771 +/- 0.00800001621246338
Measured from: 0.00800001621246338
to: 0.0360000133514404 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.45799994468689
to: 0.54200005531311 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0800000429153442 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.021271 0.042316 0.046166 0.012320
0.003576 0.004342 0.004291 0.002927 [error]
Peak 0.017522 0.046319 0.040518 0.010518
0.008715 0.008343 0.007470 0.005823 [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 8.66e-09 1.69e-08 2.54e-08 8.31e-08 7.14e-08 1.34e-07 erg/cm2
Error 2.09e-09 2.39e-09 3.49e-09 2.61e-08 8.76e-09 2.78e-08 erg/cm2
Peak flux Power-law 2.90e-01 3.22e-01 2.55e-01 3.35e-01 9.91e-01 1.20e+00 ph/cm2/s
Error 1.39e-01 8.90e-02 5.89e-02 1.81e-01 2.36e-01 2.49e-01 ph/cm2/s
Fluence Cutoff-PL 5.42e-09 1.73e-08 2.92e-08 2.43e-08 6.69e-08 7.63e-08 erg/cm2
Error 2.61e-09 2.64e-09 4.67e-09 -------- 9.75e-09 2.54e-08 erg/cm2
Peak flux Cutoff-PL 2.20e-01 3.21e-01 2.74e-01 1.77e-01 9.19e-01 9.92e-01 ph/cm2/s
Error 1.72e-01 9.42e-02 7.34e-02 2.50e-01 2.66e-01 3.65e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.38e-01 3.22e-01 2.70e-01 2.06e-01 9.38e-01 1.03e+00 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 1.407 0.216 - - 9.26e-02 1.10e-02 85.310 53
CPL -0.126 1.305 82.9 43.6 4.00e-01 7.88e-01 80.060 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.335 0.422 - - 8.25e-03 1.73e-03 51.160 53
CPL 0.497 1.813 106.5 0.0 1.83e-02 9.04e-02 50.560 52
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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.080 0.000 0.080
T90 0.064 0.000 0.064
T50 0.028 0.008 0.036
Peak 1.000 -0.458 0.542
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
282.8223 -61.7666 0.0113 24.1 -22.0 0.1350 17.0 TRIG_01017711
------------------------------------------
Foreground time interval of the image:
0.000 0.080 (delta_t = 0.080 [sec])
Background time interval of the image:
-239.152 0.000 (delta_t = 239.152 [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 0.000 sec. to 0.080 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40700 ( -0.213324 0.219299 )
Norm@50keV : 9.25567E-02 ( -0.0109587 0.0109511 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.31 using 55 PHA bins.
# Reduced chi-squared = 1.610 for 53 degrees of freedom
# Null hypothesis probability = 3.229139e-03
Photon flux (15-150 keV) in 0.08 sec: 11.2897 ( -1.47422 1.50353 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.14454e-08 ( -8.73976e-09 8.77928e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.126164 ( -1.45056 1.16032 )
Epeak [keV] : 82.9053 ( -13.8301 73.4432 )
Norm@50keV : 0.399692 ( -0.399701 1.17722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.06 using 55 PHA bins.
# Reduced chi-squared = 1.540 for 52 degrees of freedom
# Null hypothesis probability = 7.479510e-03
Photon flux (15-150 keV) in 0.08 sec: 10.0712 ( -1.5403 1.6525 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.6888e-08 ( -9.80616e-09 9.70008e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.080 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.97891E-02 ( -0.932535 3.32854 )
beta : -2.47149 ( 2.49845 0.960305 )
Epeak [keV] : 83.7509 ( -29.0327 62.1965 )
Norm@50keV : 0.365390 ( -0.516123 17.5324 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.86 using 55 PHA bins.
# Reduced chi-squared = 1.566 for 51 degrees of freedom
# Null hypothesis probability = 6.029785e-03
Photon flux (15-150 keV) in 0.08 sec: 9.97921 ( -2.97921 -0.82907 ) 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] : 18.4471 (-2.23264 2.57547)
R^2/D10^2 : 0.658619 (-0.237977 0.363263)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.45 using 55 PHA bins.
# Reduced chi-squared = 1.556 for 53 degrees of freedom
# Null hypothesis probability = 5.907696e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.561e-09 8.860e-10
25- 50 1.677e-08 2.976e-09
50-150 4.167e-08 8.096e-09
15-150 6.200e-08 9.560e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.7883 -200)
Norm : 42.9565 (-4.89179 4.89179)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.556e-09 4.740e-09
25- 50 1.646e-08 8.267e-09
50-150 3.610e-08 1.972e-08
15-150 6.111e-08 3.327e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.31418 (-4.19185 -6.31418)
R1^2/D10^2 : 6.87762 (-6.19782 36.5221)
kT2 [keV] : 20.7753 (-3.59737 -20.7753)
R2^2/D10^2 : 0.401504 (-0.398321 0.149121)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.756e-09 2.774e-09
25- 50 1.691e-08 7.335e-09
50-150 4.356e-08 1.975e-08
15-150 6.623e-08 3.053e-08
Peak spectrum fit
Power-law model
Time interval is from -0.458 sec. to 0.542 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33524 ( -0.419076 0.424409 )
Norm@50keV : 8.25089E-03 ( -0.00173902 0.00172861 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.16 using 55 PHA bins.
# Reduced chi-squared = 0.9653 for 53 degrees of freedom
# Null hypothesis probability = 5.461216e-01
Photon flux (15-150 keV) in 1 sec: 0.991031 ( -0.229925 0.241917 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.08558e-08 ( -1.7288e-08 1.74713e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.458 sec. to 0.542 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.497300 ( -2.41804 1.2077 )
Epeak [keV] : 106.502 ( -106.503 -106.503 )
Norm@50keV : 1.83171E-02 ( -0.0115438 0.169249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.56 using 55 PHA bins.
# Reduced chi-squared = 0.9722 for 52 degrees of freedom
# Null hypothesis probability = 5.308036e-01
Photon flux (15-150 keV) in 1 sec: 0.918815 ( -0.247835 0.283695 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.6665e-08 ( -2.01359e-08 1.96317e-08 ) ergs/cm2
Band function
Time interval is from -0.458 sec. to 0.542 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.496421 ( -0.871207 1.72767 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 106.131 ( -41.9299 274.037 )
Norm@50keV : 1.83811E-02 ( -0.0115631 0.16993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.56 using 55 PHA bins.
# Reduced chi-squared = 0.9913 for 51 degrees of freedom
# Null hypothesis probability = 4.911886e-01
Photon flux (15-150 keV) in 1 sec: 0.938310 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.66418e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.6283 (-4.23459 5.89767)
R^2/D10^2 : 5.43596E-02 (-0.0326118 0.0751735)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.734e-09 1.560e-09
25- 50 1.771e-08 7.294e-09
50-150 4.497e-08 1.970e-08
15-150 6.642e-08 2.378e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-74.0439 -200)
Norm : 3.85854 (-0.799133 0.799133)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.608e-09 5.645e-09
25- 50 1.848e-08 1.068e-08
50-150 4.054e-08 2.383e-08
15-150 6.863e-08 3.948e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.6465 (-10.7021 9.16258)
R1^2/D10^2 : 0.202400 (-0.195105 -0.195105)
kT2 [keV] : 32.7557 (-33.749 -33.749)
R2^2/D10^2 : 5.89001E-03 (-0.00525937 0.0610985)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.694e-09 3.533e-09
25- 50 1.886e-08 1.151e-08
50-150 5.154e-08 2.961e-08
15-150 7.610e-08 3.846e-08
Plot creation:
Tue Jan 19 12:04:00 EST 2021