batgrbproduct analysis for trigger=1104343
batgrbproduct Analysis for Trigger=1104343
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 Apr 28 18:52:08 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1104343/batgroup_hand_proc
======================================================================
Trigger: 01104343 Segment: 000
BAT Trigger Time: 672786064 [s; MET]
Trigger Stop: 672786136 [s; MET]
UTC: 2022-04-27T21:00:34.960900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.868924241971 Dec: -56.2528968519053 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.95
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.95
Flight Position: [ source = BAT ]
RA: 275.868924241971 Dec: -56.2528968519053 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 275.92150443944 Dec: -56.2565838968788 [deg; J2000]
{ 18h 23m 41.2s , -56d 15' 23.7" }
+/- 2.01238758140744 [arcmin] (estimated 90% radius based on SNR)
+/- 0.772107664312578 [arcmin] (formal 1-sigma fit error)
SNR: 11.2006860632689
Angular difference between Flight and Ground position is 1.766410 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 57.2239999771118 +/- 12.2226020476961
Measured from: 5.74800002574921
to: 62.972000002861 [s; relative to TRIGTIME]
T50: 17.7000000476837 +/- 3.97666857225581
Measured from: 8.20799994468689
to: 25.9079999923706 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.82799994945526
to: 8.82799994945526 [s; relative to TRIGTIME]
Total Fluence
Measured from: 3.09200000762939
to: 68.055999994278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.628751 1.062663 0.979138 0.357385
0.077497 0.073780 0.064637 0.057860 [error]
Peak 0.077634 0.133856 0.117398 0.055263
0.010895 0.011338 0.010558 0.009548 [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 2.06e-07 4.47e-07 7.61e-07 2.98e-06 2.09e-06 4.39e-06 erg/cm2
Error 3.04e-08 3.87e-08 6.17e-08 5.62e-07 1.57e-07 5.91e-07 erg/cm2
Peak flux Power-law 7.68e-01 9.38e-01 8.30e-01 1.26e+00 2.98e+00 3.80e+00 ph/cm2/s
Error 1.42e-01 1.04e-01 8.35e-02 2.77e-01 2.81e-01 3.56e-01 ph/cm2/s
Fluence Cutoff-PL 2.02e-07 4.50e-07 7.68e-07 2.62e-06 2.08e-06 4.00e-06 erg/cm2
Error 3.60e-08 4.15e-08 7.00e-08 1.01e-06 1.25e-07 9.88e-07 erg/cm2
Peak flux Cutoff-PL 7.71e-01 9.39e-01 8.29e-01 1.25e+00 2.98e+00 3.79e+00 ph/cm2/s
Error 1.15e-01 1.06e-01 8.99e-02 4.31e-01 2.81e-01 4.88e-01 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 1.232 0.130 - - 3.19e-03 2.28e-04 46.490 57
CPL 1.137 0.339 498.5 0.0 3.53e-03 1.47e-03 46.390 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.177 0.161 - - 2.54e-02 2.29e-03 60.130 57
CPL 1.168 0.369 9992.0 0.0 2.55e-02 1.16e-02 60.140 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: 20.224000 sec.
T50 in the 50-300 keV band: 8.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.964 3.092 68.056
T90 57.224 5.748 62.972
T50 17.700 8.208 25.908
Peak 1.000 7.828 8.828
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
275.9215 -56.2566 0.0171 35.2 6.0 3.0819 11.2 TRIG_01104343
------------------------------------------
Foreground time interval of the image:
3.092 68.056 (delta_t = 64.964 [sec])
Background time interval of the image:
-19.099 3.092 (delta_t = 22.191 [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 3.092 sec. to 68.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23202 ( -0.130715 0.128616 )
Norm@50keV : 3.19434E-03 ( -0.00022811 0.000227577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.49 using 59 PHA bins.
# Reduced chi-squared = 0.8157 for 57 degrees of freedom
# Null hypothesis probability = 8.385025e-01
Photon flux (15-150 keV) in 64.96 sec: 0.376728 ( -0.0287437 0.0289181 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08668e-06 ( -1.5678e-07 1.5749e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.092 sec. to 68.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13726 ( -0.521222 0.156729 )
Epeak [keV] : 498.532 ( -521.91 -521.91 )
Norm@50keV : 3.52728E-03 ( -0.000511 0.00243855 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.39 using 59 PHA bins.
# Reduced chi-squared = 0.8285 for 56 degrees of freedom
# Null hypothesis probability = 8.163494e-01
Photon flux (15-150 keV) in 64.96 sec: 0.374830 ( -0.030263 0.015227 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.07717e-06 ( -1.67493e-07 8.30449e-08 ) ergs/cm2
Band function
Time interval is from 3.092 sec. to 68.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.464828 ( 0.579713 0.579713 )
beta : -1.30347 ( 1.30101 0.181747 )
Epeak [keV] : 73.7328 ( -73.2648 205.266 )
Norm@50keV : 9.10810E-03 ( -0.00941629 215821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.80 using 59 PHA bins.
# Reduced chi-squared = 0.8327 for 55 degrees of freedom
# Null hypothesis probability = 8.070102e-01
Photon flux (15-150 keV) in 64.96 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] : 19.5523 (-1.88359 2.16834)
R^2/D10^2 : 1.81073E-02 (-0.00537203 0.00738684)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.72 using 59 PHA bins.
# Reduced chi-squared = 1.539 for 57 degrees of freedom
# Null hypothesis probability = 5.554977e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.745e-08 1.400e-08
25- 50 4.290e-07 5.018e-08
50-150 1.212e-06 1.367e-07
15-150 1.728e-06 1.582e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-15.9129 -200)
Norm : 1.59939 (-0.11512 0.11512)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.588e-07 2.348e-08
25- 50 4.978e-07 4.593e-08
50-150 1.092e-06 2.963e-07
15-150 1.849e-06 3.420e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.10859 (-2.07226 2.42452)
R1^2/D10^2 : 0.148019 (-0.0743494 0.186248)
kT2 [keV] : 38.5368 (-10.013 29.6668)
R2^2/D10^2 : 1.65651E-03 (-0.00129478 0.00275673)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.774e-07 6.022e-08
25- 50 4.812e-07 1.374e-07
50-150 1.437e-06 6.426e-07
15-150 2.095e-06 7.272e-07
Peak spectrum fit
Power-law model
Time interval is from 7.828 sec. to 8.828 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17661 ( -0.162693 0.159775 )
Norm@50keV : 2.54298E-02 ( -0.00229141 0.00228706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.13 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.629655e-01
Photon flux (15-150 keV) in 1 sec: 2.97548 ( -0.28027 0.281348 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.59731e-07 ( -2.52121e-08 2.53639e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.828 sec. to 8.828 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16815 ( -0.574298 0.162734 )
Epeak [keV] : 9992.04 ( -9999.01 -9999.01 )
Norm@50keV : 2.55454E-02 ( -0.00228903 0.020829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.14 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 56 degrees of freedom
# Null hypothesis probability = 3.282509e-01
Photon flux (15-150 keV) in 1 sec: 2.97641 ( -0.28348 0.27775 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.59852e-07 ( -2.5628e-08 2.5103e-08 ) ergs/cm2
Band function
Time interval is from 7.828 sec. to 8.828 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.455131 ( 0.560817 5.27678 )
beta : -1.25945 ( 1.24686 0.219516 )
Epeak [keV] : 81.7479 ( -81.1065 225.718 )
Norm@50keV : 6.69792E-02 ( -0.0687437 1.44701e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.69 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 55 degrees of freedom
# Null hypothesis probability = 3.090252e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.2147 (-2.3302 2.81153)
R^2/D10^2 : 0.155123 (-0.0562996 0.0838091)
(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 1.121e-08 1.966e-09
25- 50 5.435e-08 7.270e-09
50-150 1.478e-07 2.295e-08
15-150 2.133e-07 2.565e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-21.4828 -200)
Norm : 12.4552 (-1.14348 1.14348)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.102e-08 4.135e-09
25- 50 5.968e-08 1.796e-08
50-150 1.309e-07 6.493e-08
15-150 2.216e-07 8.770e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.6497 (-2.53184 2.51348)
R1^2/D10^2 : 0.789974 (-0.369507 0.937375)
kT2 [keV] : 63.6485 (-31.2718 -65.5252)
R2^2/D10^2 : 3.57329E-03 (-0.00289892 0.016057)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.989e-08 7.274e-09
25- 50 6.025e-08 2.597e-08
50-150 1.799e-07 8.739e-08
15-150 2.600e-07 1.068e-07
Plot creation:
Thu Apr 28 19:28:47 EDT 2022