batgrbproduct analysis for trigger=1153670
batgrbproduct Analysis for Trigger=1153670
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): Sat Feb 11 11:36:10 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1153670/GCN5_download_cron
======================================================================
Trigger: 01153670 Segment: 000
BAT Trigger Time: 697701166.144 [s; MET]
Trigger Stop: 697701170.24 [s; MET]
UTC: 2023-02-10T05:52:15.412220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 50.7449101340774 Dec: 7.15309491256854 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.17
Image Trigger?: NO
Rate S/N Ratio: 8 [ if not an image trigger ]
Image S/N Ratio: 7.17
Flight Position: [ source = BAT ]
RA: 50.7449101340774 Dec: 7.15309491256854 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 50.8108544079505 Dec: 7.16526165879721 [deg; J2000]
{ 03h 23m 14.6s , +07d 09' 54.9" }
+/- 4.38006916638397 [arcmin] (estimated 90% radius based on SNR)
+/- 2.94578855566917 [arcmin] (formal 1-sigma fit error)
SNR: 3.68737236303259
Angular difference between Flight and Ground position is 3.993105 arcmin
Partial Coding Fraction: 0.671875 [ including projection effects ]
Duration
T90: 4.09599995613098 +/-
Measured from: 0
to: 4.09599995613098 [s; relative to TRIGTIME]
T50: 4.09599995613098 +/-
Measured from: 0
to: 4.09599995613098 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 4.09599995613098 second)
Measured from: 0
to: 4.09599995613098 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 4.09599995613098 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.006404 0.126944 0.050167 -0.004946
0.023686 0.024796 0.020169 0.016331 [error]
Peak 0.006404 0.126944 0.050167 -0.004946
0.023686 0.024796 0.020169 0.016331 [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 1.67e-08 3.05e-08 4.28e-08 1.26e-07 1.23e-07 2.15e-07 erg/cm2
Error 8.58e-09 1.11e-08 1.78e-08 1.02e-07 4.55e-08 1.20e-07 erg/cm2
Peak flux Power-law 1.31e-01 1.31e-01 9.22e-02 1.03e-01 3.96e-01 4.57e-01 ph/cm2/s
Error 6.85e-02 4.84e-02 3.76e-02 7.70e-02 1.41e-01 1.61e-01 ph/cm2/s
Fluence Cutoff-PL 3.76e-09 5.77e-08 3.00e-08 6.43e-11 9.16e-08 9.15e-08 erg/cm2
Error 5.40e-09 1.82e-08 2.19e-08 2.99e-09 3.00e-08 3.01e-08 erg/cm2
Peak flux Cutoff-PL 2.63e-02 2.32e-01 7.81e-02 9.69e-05 3.37e-01 3.37e-01 ph/cm2/s
Error 4.09e-02 7.62e-02 4.98e-02 3.97e-03 1.09e-01 1.09e-01 ph/cm2/s
Fluence Band 8.09e-09 5.20e-08 4.15e-08 1.59e-09 1.02e-07 1.02e-07 erg/cm2
Error 5.65e-09 -------- 2.02e-08 3.91e-08 -------- -------- erg/cm2
Peak flux Band 5.99e-02 2.17e-01 9.94e-02 2.05e-03 3.78e-01 3.78e-01 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 1.516 0.493 - - 3.16e-03 1.12e-03 66.340 57
CPL -9.997 -1.201 45.3 5.7 4.00e+03 1.19e+04 54.180 56
The chi2 of BB fit is 57.94 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.516 0.493 - - 3.16e-03 1.12e-03 66.340 57
CPL -9.997 -1.201 45.3 5.7 4.00e+03 1.19e+04 54.180 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 4.096 0.000 4.096
T90 4.096 0.000 4.096
T50 4.096 0.000 4.096
Peak 4.096 0.000 4.096
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
50.8109 +7.1653 0.0523 32.6 157.5 0.1632 3.7 TRIG_01153670
------------------------------------------
Foreground time interval of the image:
0.000 4.096 (delta_t = 4.096 [sec])
Background time interval of the image:
-239.144 -53.114 (delta_t = 186.030 [sec])
-52.144 -21.844 (delta_t = 30.300 [sec])
-21.144 -14.144 (delta_t = 7.000 [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 0.000 sec. to 4.096 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51564 ( -0.487207 0.498474 )
Norm@50keV : 3.15813E-03 ( -0.00112364 0.00111943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.34 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 57 degrees of freedom
# Null hypothesis probability = 1.860349e-01
Photon flux (15-150 keV) in 4.096 sec: 0.395677 ( -0.139262 0.141741 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22554e-07 ( -4.44973e-08 4.64085e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99726 ( 9.99849 7.59702 )
Epeak [keV] : 45.2860 ( -5.41006 6.03263 )
Norm@50keV : 4002.53 ( -1303.66 22594.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.18 using 59 PHA bins.
# Reduced chi-squared = 0.9675 for 56 degrees of freedom
# Null hypothesis probability = 5.439596e-01
Photon flux (15-150 keV) in 4.096 sec: 0.336783 0.333214 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.96988e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.7396 -5 )
beta : -9.37167 ( 9.37167 19.3356 )
Epeak [keV] : 47.6448 ( -8.52732 8.99087 )
Norm@50keV : 9.99108 ( -2.85174 24.3304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.25 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 55 degrees of freedom
# Null hypothesis probability = 4.652463e-01
Photon flux (15-150 keV) in 4.096 sec: 0.377822 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02136e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5147 (-2.87075 4.05554)
R^2/D10^2 : 8.04157E-02 (-0.0511965 0.111797)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.402991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.274e-08 7.942e-09
25- 50 4.572e-08 2.738e-08
50-150 5.397e-08 3.710e-08
15-150 1.124e-07 6.850e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 147.075 (-91.5599 -148.073)
Norm : 1.73502 (-0.613736 0.790416)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.750e-08 1.059e-08
25- 50 3.317e-08 2.003e-08
50-150 6.979e-08 4.282e-08
15-150 1.205e-07 7.412e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.117761 (3.28998 -0.117761)
R1^2/D10^2 : 1.42734E+09 (-1.42734e+09 -1.42734e+09)
kT2 [keV] : 13.5146 (-2.87071 4.05558)
R2^2/D10^2 : 8.04167E-02 (-0.0511974 0.111797)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51564 ( -0.487207 0.498474 )
Norm@50keV : 3.15813E-03 ( -0.00112364 0.00111943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.34 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 57 degrees of freedom
# Null hypothesis probability = 1.860349e-01
Photon flux (15-150 keV) in 4.096 sec: 0.395677 ( -0.139262 0.141741 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.22554e-07 ( -4.44973e-08 4.64085e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99726 ( 9.99849 7.59702 )
Epeak [keV] : 45.2860 ( -5.41006 6.03263 )
Norm@50keV : 4002.53 ( -1303.66 22594.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.18 using 59 PHA bins.
# Reduced chi-squared = 0.9675 for 56 degrees of freedom
# Null hypothesis probability = 5.439596e-01
Photon flux (15-150 keV) in 4.096 sec: 0.336783 0.333214 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.96988e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 4.096 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -3.7396 -5 )
beta : -9.37167 ( 9.37167 19.3356 )
Epeak [keV] : 47.6448 ( -8.52732 8.99087 )
Norm@50keV : 9.99108 ( -2.85174 24.3304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.25 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 55 degrees of freedom
# Null hypothesis probability = 4.652463e-01
Photon flux (15-150 keV) in 4.096 sec: 0.377822 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02136e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5147 (-2.87075 4.05554)
R^2/D10^2 : 8.04157E-02 (-0.0511965 0.111797)
(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 1.274e-08 7.940e-09
25- 50 4.572e-08 2.701e-08
50-150 5.397e-08 3.863e-08
15-150 1.124e-07 7.166e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 147.075 (-91.5599 -148.073)
Norm : 1.73502 (-0.613736 0.790416)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.750e-08 1.082e-08
25- 50 3.317e-08 1.951e-08
50-150 6.979e-08 4.149e-08
15-150 1.205e-07 7.348e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.117761 (3.28998 -0.117761)
R1^2/D10^2 : 1.42734E+09 (-1.42734e+09 -1.42734e+09)
kT2 [keV] : 13.5146 (-2.87071 4.05558)
R2^2/D10^2 : 8.04167E-02 (-0.0511974 0.111797)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sat Feb 11 11:40:38 EST 2023