batgrbproduct analysis for trigger=1192743
batgrbproduct Analysis for Trigger=1192743
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): Wed Sep 27 12:55:16 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192743/GCN5_download_cron
======================================================================
Trigger: 01192743 Segment: 000
BAT Trigger Time: 717461104 [s; MET]
Trigger Stop: 717461168 [s; MET]
UTC: 2023-09-26T22:44:31.919060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.087457142605 Dec: -16.357820492806 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 19.34
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 19.34
Flight Position: [ source = BAT ]
RA: 245.087457142605 Dec: -16.357820492806 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.08990341007 Dec: -16.3469567524458 [deg; J2000]
{ 16h 20m 21.6s , -16d 20' 49.0" }
+/- 1.09051474436266 [arcmin] (estimated 90% radius based on SNR)
+/- 0.347213763033096 [arcmin] (formal 1-sigma fit error)
SNR: 26.8756535777803
Angular difference between Flight and Ground position is 0.666866 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.425832 0.708813 -0.009147 -0.014583
0.082212 0.068240 0.054005 0.045638 [error]
Peak 4.425832 0.708813 -0.009147 -0.014583
0.082212 0.068240 0.054005 0.045638 [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 1.38e-06 2.84e-07 2.92e-08 3.28e-09 1.69e-06 1.69e-06 erg/cm2
Error 1.26e-07 3.77e-08 9.87e-09 1.94e-09 1.26e-07 1.25e-07 erg/cm2
Peak flux Power-law 7.50e-01 8.98e-02 4.61e-03 2.48e-04 8.44e-01 8.44e-01 ph/cm2/s
Error 7.12e-02 1.12e-02 1.52e-03 1.42e-04 7.02e-02 7.01e-02 ph/cm2/s
Fluence Cutoff-PL 1.36e-06 2.59e-07 7.73e-09 2.32e-11 1.63e-06 1.63e-06 erg/cm2
Error 1.32e-07 5.06e-08 2.16e-08 2.03e-09 1.08e-07 1.43e-07 erg/cm2
Peak flux Cutoff-PL 7.36e-01 8.38e-02 1.32e-03 2.08e-06 8.21e-01 8.21e-01 ph/cm2/s
Error 7.59e-02 1.44e-02 2.62e-03 1.55e-04 7.69e-02 7.69e-02 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 5.283 0.310 - - 4.17e-04 1.12e-04 70.880 57
CPL 1.000 0.000 50.0 0.0 4.73e-03 0.00e+00 443.490 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.283 0.310 - - 4.17e-04 1.12e-04 70.880 57
CPL 1.000 0.000 50.0 0.0 4.73e-03 0.00e+00 443.490 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.0899 -16.3470 0.0071 16.3 -92.3 5.1787 26.9 TRIG_01192743
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.28346 ( -0.306265 0.31364 )
Norm@50keV : 4.16514E-04 ( -0.000100771 0.000122357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.88 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 57 degrees of freedom
# Null hypothesis probability = 1.022196e-01
Photon flux (15-150 keV) in 64 sec: 0.844338 ( -0.0697783 0.0705283 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69319e-06 ( -1.25251e-07 1.25941e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 4.73257E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 443.49 using 59 PHA bins.
# Reduced chi-squared = 7.9195 for 56 degrees of freedom
# Null hypothesis probability = 1.132852e-61
Photon flux (15-150 keV) in 64 sec: 0.821287 ( -0.077626 0.076127 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62833e-06 ( -7.26976e-08 1.43629e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.55617 ( )
beta : -9.37167 ( )
Epeak [keV] : 22.3079 ( )
Norm@50keV : 4.72013E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 358.76 using 59 PHA bins.
# Reduced chi-squared = 6.5229 for 55 degrees of freedom
# Null hypothesis probability = 3.722813e-46
Photon flux (15-150 keV) in 64 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] : 3.06670 (-0.205798 0.229162)
R^2/D10^2 : 95.1007 (-38.3759 64.0516)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.26 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 57 degrees of freedom
# Null hypothesis probability = 5.300407e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.303e-06 1.702e-07
25- 50 2.049e-07 3.344e-08
50-150 3.937e-10 2.201e-10
15-150 1.508e-06 2.019e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.84424 (-0.586182 0.696665)
Norm : 109.340 (-36.287 54.7403)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.343e-06 1.616e-07
25- 50 2.369e-07 3.725e-08
50-150 2.550e-09 1.262e-09
15-150 1.582e-06 1.990e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.03599 (-0.205769 0.22919)
R1^2/D10^2 : 0.181906 (-38.3824 64.045)
kT2 [keV] : 2.69609 (-1.52602 0.354356)
R2^2/D10^2 : 212.473 (-114.28 96302.8)
------------------------------------------------------------
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.28346 ( -0.306265 0.31364 )
Norm@50keV : 4.16514E-04 ( -0.000100771 0.000122357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.88 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 57 degrees of freedom
# Null hypothesis probability = 1.022196e-01
Photon flux (15-150 keV) in 64 sec: 0.844338 ( -0.0697783 0.0705283 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69319e-06 ( -1.25251e-07 1.25941e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 4.73257E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 443.49 using 59 PHA bins.
# Reduced chi-squared = 7.9195 for 56 degrees of freedom
# Null hypothesis probability = 1.132852e-61
Photon flux (15-150 keV) in 64 sec: 0.821287 ( -0.077626 0.076127 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62833e-06 ( -7.26976e-08 1.43629e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.55617 ( )
beta : -9.37167 ( )
Epeak [keV] : 22.3079 ( )
Norm@50keV : 4.72013E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 358.76 using 59 PHA bins.
# Reduced chi-squared = 6.5229 for 55 degrees of freedom
# Null hypothesis probability = 3.722813e-46
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06069e-06 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.06670 (-0.205798 0.229162)
R^2/D10^2 : 95.1007 (-38.3759 64.0516)
(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 1.303e-06 1.760e-07
25- 50 2.049e-07 3.341e-08
50-150 3.937e-10 2.259e-10
15-150 1.508e-06 2.368e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.84424 (-0.586182 0.696665)
Norm : 109.340 (-36.287 54.7403)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.343e-06 1.562e-07
25- 50 2.369e-07 4.003e-08
50-150 2.550e-09 1.326e-09
15-150 1.582e-06 2.016e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.03599 (-0.205769 0.22919)
R1^2/D10^2 : 0.181906 (-38.3824 64.045)
kT2 [keV] : 2.69609 (-1.52602 0.354356)
R2^2/D10^2 : 212.473 (-114.28 96302.8)
------------------------------------------------------------
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:
Wed Sep 27 12:57:24 EDT 2023