batgrbproduct analysis for trigger=1000631
batgrbproduct Analysis for Trigger=1000631
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 Oct 18 10:48:06 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1000631/batgroup_hand_proc
======================================================================
Trigger: 01000631 Segment: 000
BAT Trigger Time: 624633256 [s; MET]
Trigger Stop: 624633640 [s; MET]
UTC: 2020-10-17T13:13:50.178980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 170.2333309798 Dec: -60.6136806155216 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.33
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.33
Flight Position: [ source = BAT ]
RA: 170.2333309798 Dec: -60.6136806155216 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 170.289297470715 Dec: -60.5883070915782 [deg; J2000]
{ 11h 21m 09.4s , -60d 35' 17.9" }
+/- 3.74892214971136 [arcmin] (estimated 90% radius based on SNR)
+/- 1.87358111676318 [arcmin] (formal 1-sigma fit error)
SNR: 4.60523782355812
Angular difference between Flight and Ground position is 2.243871 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
T50: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 384 second)
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.928758 0.492101 -0.246851 -0.037623
0.144015 0.144446 0.125995 0.119903 [error]
Peak 1.928758 0.492101 -0.246851 -0.037623
0.144015 0.144446 0.125995 0.119903 [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 5.81e-07 1.91e-07 3.52e-08 7.59e-09 8.12e-07 8.15e-07 erg/cm2
Error 8.49e-08 6.58e-08 2.67e-08 1.14e-08 1.43e-07 1.46e-07 erg/cm2
Peak flux Power-law 5.19e-02 9.81e-03 9.04e-04 9.06e-05 6.26e-02 6.27e-02 ph/cm2/s
Error 7.68e-03 3.20e-03 6.65e-04 1.30e-04 9.32e-03 9.33e-03 ph/cm2/s
Fluence Cutoff-PL 6.02e-07 1.72e-07 4.33e-09 2.63e-12 7.78e-07 7.78e-07 erg/cm2
Error 9.01e-08 8.57e-08 2.04e-08 2.27e-09 1.29e-07 1.29e-07 erg/cm2
Peak flux Cutoff-PL 5.30e-02 9.22e-03 1.29e-04 4.75e-08 6.24e-02 6.24e-02 ph/cm2/s
Error 8.08e-03 3.98e-03 5.28e-04 4.53e-05 9.07e-03 9.06e-03 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 5.30e-02 9.26e-03 1.35e-04 4.16e-07 6.24e-02 6.24e-02 ph/cm2/s
Error 8.06e-03 3.86e-03 -------- -------- 8.97e-03 8.98e-03 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.440 0.602 - - 6.85e-05 4.08e-05 59.990 0
CPL 1.498 0.000 4.0 0.0 1.40e-02 0.00e+00 57.230 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.440 0.602 - - 6.85e-05 4.08e-05 59.990 0
CPL 1.498 0.000 4.0 0.0 1.40e-02 0.00e+00 0.429 0
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 384.000 0.000 384.000
T90 384.000 0.000 384.000
T50 384.000 0.000 384.000
Peak 384.000 0.000 384.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
170.2893 -60.5883 0.0416 14.9 -153.0 2.2755 4.6 TRIG_01000631
------------------------------------------
Foreground time interval of the image:
0.000 384.000 (delta_t = 384.000 [sec])
Background time interval of the image:
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 384.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.44020 ( -0.549357 0.655408 )
Norm@50keV : 6.85324E-05 ( -3.38297e-05 4.76955e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.99 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.68e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 384 sec: 6.26499E-02 ( -0.0093003 0.00933143 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.12329e-07 ( -1.39006e-07 1.46923e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49834 ( )
Epeak [keV] : 3.97588 ( )
Norm@50keV : 1.39540E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.29e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 384 sec: 6.23824E-02 ( -0.009029 0.0091152 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.78057e-07 ( -1.24827e-07 1.33359e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 384.000 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26683 ( 1.67482 1.67482 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 5.38453 ( -2.50574 10.3288 )
Norm@50keV : 2.11706E-02 ( -0.0211698 1360 )
------------------------------------------------------------
Photon flux (15-150 keV) in 384 sec: 6.24103E-02 ( 6.93759 -0.0089844 ) 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] : 3.47973 (-0.518067 0.594519)
R^2/D10^2 : 3.57128 (-2.10019 5.84698)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.36e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.088e-07 2.515e-07
25- 50 1.449e-07 6.778e-08
50-150 7.130e-10 6.490e-10
15-150 7.544e-07 3.174e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.69517 (-1.77238 2.38265)
Norm : 3.94358 (-1.81898 4.0839)
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.67e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.006e-07 1.906e-07
25- 50 1.752e-07 8.028e-08
50-150 5.422e-09 4.780e-09
15-150 7.812e-07 2.473e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.69625 (-0.887218 -3.9668)
R1^2/D10^2 : 2.44148 (-1.1012 6.24479)
kT2 [keV] : 0.229462 (-1.79419 -1.79419)
R2^2/D10^2 : 3.65148E+21 (-3.98217e+21 -3.98217e+21)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.44 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.21e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.902e-07 3.007e-07
25- 50 1.758e-07 9.949e-08
50-150 1.983e-09 1.459e-09
15-150 7.680e-07 3.936e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.44020 ( -0.549357 0.655408 )
Norm@50keV : 6.85324E-05 ( -3.38297e-05 4.76955e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.99 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.68e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 384 sec: 6.26499E-02 ( -0.0093003 0.00933143 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.12329e-07 ( -1.39006e-07 1.46923e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49834 ( )
Epeak [keV] : 3.97588 ( )
Norm@50keV : 1.39540E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.29e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 384 sec: 6.23824E-02 ( -0.009029 0.0091152 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.78057e-07 ( -1.24827e-07 1.33359e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 384.000 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26683 ( 1.67482 1.67482 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 5.38453 ( -2.50574 10.3287 )
Norm@50keV : 2.11706E-02 ( -0.0211698 1360 )
------------------------------------------------------------
Photon flux (15-150 keV) in 384 sec: 6.24103E-02 ( 6.93759 -0.0089844 ) 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] : 3.47973 (-0.518067 0.594519)
R^2/D10^2 : 3.57128 (-2.10019 5.84698)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.05 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.36e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.088e-07 2.512e-07
25- 50 1.449e-07 7.081e-08
50-150 7.130e-10 6.763e-10
15-150 7.544e-07 3.053e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.69517 (-1.77238 2.38265)
Norm : 3.94358 (-1.81898 4.0839)
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.67e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.006e-07 2.029e-07
25- 50 1.752e-07 7.471e-08
50-150 5.422e-09 4.779e-09
15-150 7.812e-07 2.721e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.69625 (-0.887218 -3.9668)
R1^2/D10^2 : 2.44148 (-1.1012 6.24479)
kT2 [keV] : 0.229462 (-1.79419 -1.79419)
R2^2/D10^2 : 3.65148E+21 (-3.98217e+21 -3.98217e+21)
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.44 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.21e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.902e-07 3.020e-07
25- 50 1.758e-07 1.003e-07
50-150 1.983e-09 1.538e-09
15-150 7.680e-07 3.836e-07
Plot creation:
Sun Oct 18 10:55:54 EDT 2020