batgrbproduct analysis for trigger=1131029
batgrbproduct Analysis for Trigger=1131029
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 Oct 25 11:16:17 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1131029/GCN5_download_cron
======================================================================
Trigger: 01131029 Segment: 000
BAT Trigger Time: 688309257.216 [s; MET]
Trigger Stop: 688309261.312 [s; MET]
UTC: 2022-10-24T13:00:27.123500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 169.71820537361 Dec: 33.041010097512 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.22
Image Trigger?: NO
Rate S/N Ratio: 14.3178210632764 [ if not an image trigger ]
Image S/N Ratio: 10.22
Flight Position: [ source = BAT ]
RA: 169.71820537361 Dec: 33.041010097512 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 169.702496397368 Dec: 33.0680408917782 [deg; J2000]
{ 11h 18m 48.6s , +33d 04' 04.9" }
+/- 2.87071329030472 [arcmin] (estimated 90% radius based on SNR)
+/- 1.35947872650426 [arcmin] (formal 1-sigma fit error)
SNR: 6.74290760328582
Angular difference between Flight and Ground position is 1.804016 arcmin
Partial Coding Fraction: 0.359375 [ including projection effects ]
Duration
T90: 120.111999988556 +/- 111.563213448307
Measured from: 0.272000193595886
to: 120.384000182152 [s; relative to TRIGTIME]
T50: 102.368000030518 +/- 216.392178076845
Measured from: 2.4960001707077
to: 104.864000201225 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.932000041008
to: 3.932000041008 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 221.280000090599 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.394978 0.898175 0.723897 0.184279
0.112429 0.117110 0.103779 0.090338 [error]
Peak 0.054808 0.062238 0.052833 0.019573
0.011712 0.013164 0.011739 0.009452 [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 1.83e-07 3.60e-07 5.51e-07 1.84e-06 1.54e-06 2.93e-06 erg/cm2
Error 4.69e-08 5.73e-08 1.00e-07 7.23e-07 2.50e-07 7.95e-07 erg/cm2
Peak flux Power-law 5.43e-01 4.95e-01 3.11e-01 2.99e-01 1.47e+00 1.65e+00 ph/cm2/s
Error 1.74e-01 1.06e-01 9.16e-02 1.72e-01 3.12e-01 3.54e-01 ph/cm2/s
Fluence Cutoff-PL 1.50e-07 3.94e-07 5.93e-07 5.58e-07 1.45e-06 1.69e-06 erg/cm2
Error 5.88e-08 7.14e-08 1.18e-07 1.03e-06 2.70e-07 9.74e-07 erg/cm2
Peak flux Cutoff-PL 5.20e-01 5.15e-01 3.20e-01 2.05e-01 1.46e+00 1.56e+00 ph/cm2/s
Error 1.91e-01 1.29e-01 1.01e-01 2.43e-01 3.14e-01 3.97e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 5.13e-01 5.17e-01 3.23e-01 1.99e-01 1.46e+00 1.55e+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 1.386 0.248 - - 7.19e-04 1.06e-04 53.660 57
CPL 0.357 1.298 83.0 -29.8 2.27e-03 5.58e-03 51.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.669 0.361 - - 1.12e-02 2.60e-03 58.020 57
CPL 1.350 1.228 98.1 0.0 1.66e-02 5.36e-02 57.810 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: 24.640000 sec.
T50 in the 50-300 keV band: 12.096000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 221.280 0.000 221.280
T90 120.112 0.272 120.384
T50 102.368 2.496 104.864
Peak 1.000 2.932 3.932
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
169.7025 +33.0680 0.0284 34.5 -128.6 0.8982 6.7 TRIG_01131029
------------------------------------------
Foreground time interval of the image:
0.000 32.485 (delta_t = 32.485 [sec])
Background time interval of the image:
-239.216 0.000 (delta_t = 239.216 [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 221.280 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38634 ( -0.247802 0.247614 )
Norm@50keV : 7.19109E-04 ( -0.000106438 0.000106232 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.66 using 59 PHA bins.
# Reduced chi-squared = 0.9415 for 57 degrees of freedom
# Null hypothesis probability = 6.010177e-01
Photon flux (15-150 keV) in 221.3 sec: 8.73063E-02 ( -0.0131827 0.0132222 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54207e-06 ( -2.48591e-07 2.51375e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 221.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.356604 ( -1.49587 1.09957 )
Epeak [keV] : 83.0380 ( -23.3687 -83.0379 )
Norm@50keV : 2.27262E-03 ( -0.00227263 0.00889495 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.21 using 59 PHA bins.
# Reduced chi-squared = 0.9145 for 56 degrees of freedom
# Null hypothesis probability = 6.564127e-01
Photon flux (15-150 keV) in 221.3 sec: 8.34768E-02 ( -0.0140621 0.0139409 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.448e-06 ( -2.67629e-07 2.72945e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 221.280 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.400702 ( -0.882302 3.06028 )
beta : -2.61890 ( 2.5506 9.38514 )
Epeak [keV] : 84.1238 ( -82.3139 356.988 )
Norm@50keV : 2.17135E-03 ( -0.00230454 0.604276 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.19 using 59 PHA bins.
# Reduced chi-squared = 0.9308 for 55 degrees of freedom
# Null hypothesis probability = 6.208592e-01
Photon flux (15-150 keV) in 221.3 sec: 8.53470E-02 ( ) 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] : 16.5489 (-2.49959 3.08571)
R^2/D10^2 : 7.46479E-03 (-0.00335959 0.00574149)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9620 for 57 degrees of freedom
# Null hypothesis probability = 5.568078e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.280e-08 2.679e-08
25- 50 4.017e-07 1.057e-07
50-150 7.785e-07 2.412e-07
15-150 1.273e-06 2.778e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-69.9591 -200)
Norm : 0.363062 (-0.0533235 0.0533235)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.001e-07 1.159e-07
25- 50 3.850e-07 2.132e-07
50-150 8.443e-07 4.740e-07
15-150 1.429e-06 8.097e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.58796 (-3.58702 11.4931)
R1^2/D10^2 : 0.775581 (-0.766543 -0.775964)
kT2 [keV] : 18.4944 (-3.36632 -18.4942)
R2^2/D10^2 : 4.80054E-03 (-0.00476374 0.00517078)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.620e-07 6.819e-08
25- 50 3.637e-07 1.428e-07
50-150 8.504e-07 3.406e-07
15-150 1.376e-06 4.823e-07
Peak spectrum fit
Power-law model
Time interval is from 2.932 sec. to 3.932 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66875 ( -0.34789 0.373635 )
Norm@50keV : 1.12184E-02 ( -0.00263841 0.00255761 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.02 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 57 degrees of freedom
# Null hypothesis probability = 4.374084e-01
Photon flux (15-150 keV) in 1 sec: 1.47403 ( -0.312206 0.312354 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04147e-07 ( -2.52984e-08 2.57776e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.932 sec. to 3.932 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34956 ( -1.52152 0.934338 )
Epeak [keV] : 98.1251 ( -98.1282 -98.1282 )
Norm@50keV : 1.65953E-02 ( -0.016595 0.0906651 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.81 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 56 degrees of freedom
# Null hypothesis probability = 4.080940e-01
Photon flux (15-150 keV) in 1 sec: 1.46414 ( -0.31407 0.31445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0235e-07 ( -2.66615e-08 2.6645e-08 ) ergs/cm2
Band function
Time interval is from 2.932 sec. to 3.932 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.34965 ( -1.70393 1.16726 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 98.1319 ( -57.7043 -98.1319 )
Norm@50keV : 1.65907E-02 ( -0.00764501 0.0910354 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.81 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 55 degrees of freedom
# Null hypothesis probability = 3.717596e-01
Photon flux (15-150 keV) in 1 sec: 1.46151 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03143e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.8777 (-3.31254 4.64926)
R^2/D10^2 : 0.283203 (-0.189092 0.537525)
(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 9.961e-09 4.217e-09
25- 50 3.396e-08 1.133e-08
50-150 3.541e-08 1.696e-08
15-150 7.933e-08 3.176e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 150.851 (-85.3049 -148.978)
Norm : 6.12328 (-1.37319 1.93113)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.572e-08 9.260e-09
25- 50 2.916e-08 1.651e-08
50-150 5.769e-08 3.501e-08
15-150 1.026e-07 6.105e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.68753 (-2.52714 4.18452)
R1^2/D10^2 : 3.63880 (-3.0895 39.39)
kT2 [keV] : 23.2388 (-8.64796 28.8731)
R2^2/D10^2 : 2.71158E-02 (-0.0248897 0.12877)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.707e-08 9.875e-09
25- 50 2.718e-08 1.454e-08
50-150 5.903e-08 3.605e-08
15-150 1.033e-07 5.590e-08
Plot creation:
Tue Oct 25 11:19:37 EDT 2022