batgrbproduct analysis for trigger=1192253
batgrbproduct Analysis for Trigger=1192253
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 Sep 17 01:40:10 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192253/GCN5_download_cron
======================================================================
Trigger: 01192253 Segment: 000
BAT Trigger Time: 716531440 [s; MET]
Trigger Stop: 716531504 [s; MET]
UTC: 2023-09-16T04:30:07.982700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 261.575898820722 Dec: -17.1172004697103 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 22.8
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 22.8
Flight Position: [ source = BAT ]
RA: 261.575898820722 Dec: -17.1172004697103 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 261.717483248912 Dec: -16.9781890083683 [deg; J2000]
{ 17h 26m 52.2s , -16d 58' 41.5" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 2.29523570107203 [arcmin] (formal 1-sigma fit error)
SNR: -9.10264878755363
Angular difference between Flight and Ground position is 11.641765 arcmin
Partial Coding Fraction: 0.7421875 [ including projection effects ]
Duration
T90: 141.723999977112 +/- 96.0147277143712
Measured from: 24.5080001354218
to: 166.232000112534 [s; relative to TRIGTIME]
T50: 141.723999977112 +/- 100.462000737372
Measured from: 24.5080001354218
to: 166.232000112534 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 130.34399998188
to: 131.34399998188 [s; relative to TRIGTIME]
Total Fluence
Measured from: 24.5080000162125
to: 166.231999993324 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.457207 5.383196 1.383575 0.143076
0.122026 0.103538 0.080653 0.067260 [error]
Peak 0.079615 0.067724 0.029634 -0.001997
0.010576 0.009169 0.007030 0.005708 [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 2.77e-06 2.17e-06 1.15e-06 8.77e-07 6.49e-06 6.97e-06 erg/cm2
Error 1.48e-07 6.75e-08 7.51e-08 1.16e-07 2.01e-07 2.25e-07 erg/cm2
Peak flux Power-law 7.77e-01 4.86e-01 1.96e-01 1.07e-01 1.51e+00 1.57e+00 ph/cm2/s
Error 1.62e-01 7.51e-02 5.65e-02 5.76e-02 2.29e-01 2.36e-01 ph/cm2/s
Fluence Cutoff-PL 2.60e-06 2.24e-06 1.07e-06 3.73e-07 6.16e-06 6.29e-06 erg/cm2
Error 1.87e-07 8.22e-08 9.69e-08 2.19e-07 2.91e-07 3.96e-07 erg/cm2
Peak flux Cutoff-PL 7.55e-01 5.05e-01 1.93e-01 6.46e-02 1.50e+00 1.52e+00 ph/cm2/s
Error 1.82e-01 9.72e-02 6.20e-02 8.48e-02 2.38e-01 2.62e-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 2.923 0.079 - - 3.99e-03 1.81e-04 40.700 57
CPL 1.985 -0.901 0.6 0.1 1.38e-02 9.02e-04 37.360 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.312 0.314 - - 8.60e-03 1.87e-03 56.170 57
CPL 1.976 0.000 2.9 0.0 1.36e-02 0.00e+00 55.950 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 141.724 24.508 166.232
T90 141.724 24.508 166.232
T50 141.724 24.508 166.232
Peak 1.000 130.344 131.344
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
261.7175 -16.9782 0.0211 16.3 85.6 -2.7841 -9.1 TRIG_01192253
------------------------------------------
Foreground time interval of the image:
24.508 24.520 (delta_t = 0.012 [sec])
26.000 166.232 (delta_t = 140.232 [sec])
Background time interval of the image:
-60.000 -52.890 (delta_t = 7.110 [sec])
-52.000 24.508 (delta_t = 76.508 [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
Multiple GTIs in the spectrum
tstart tstop
24.508000 24.520000
26.000000 166.232000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.92296 ( -0.0786383 0.0800637 )
Norm@50keV : 3.98943E-03 ( -0.000181488 0.000180576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.70 using 59 PHA bins.
# Reduced chi-squared = 0.7140 for 57 degrees of freedom
# Null hypothesis probability = 9.493606e-01
Photon flux (15-150 keV) in 140.2 sec: 1.03794 ( -0.039921 0.0404065 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.49305e-06 ( -2.00967e-07 2.0098e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
24.508000 24.520000
26.000000 166.232000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98540 ( -0.183714 -1.9854 )
Epeak [keV] : 0.611152 ( -0.0595925 0.0678171 )
Norm@50keV : 1.37952E-02 ( -0.000473549 0.0013303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.36 using 59 PHA bins.
# Reduced chi-squared = 0.6672 for 56 degrees of freedom
# Null hypothesis probability = 9.738735e-01
Photon flux (15-150 keV) in 140.2 sec: 0.992038 ( -0.049646 0.050142 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.16426e-06 ( -2.8849e-07 2.93789e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
24.508000 24.520000
26.000000 166.232000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.86436 ( -0.325113 0.307711 )
beta : -3.15242 ( -0.505679 0.182141 )
Epeak [keV] : 4.35659 ( -2.52469 8.96397 )
Norm@50keV : 1.83051E-02 ( -0.00398075 0.167187 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.56 using 59 PHA bins.
# Reduced chi-squared = 0.5919 for 55 degrees of freedom
# Null hypothesis probability = 9.931117e-01
Photon flux (15-150 keV) in 140.2 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] : 7.46684 ( )
R^2/D10^2 : 1.20337 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 175.22 using 59 PHA bins.
# Reduced chi-squared = 3.0740 for 57 degrees of freedom
# Null hypothesis probability = 5.945414e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.608e-06 9.954e-08
25- 50 2.488e-06 7.851e-08
50-150 5.178e-07 5.734e-08
15-150 4.614e-06 1.640e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.5048 (-1.70525 1.87149)
Norm : 8.68358 (-0.772213 0.858971)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.258e-06 1.143e-07
25- 50 2.344e-06 7.290e-08
50-150 1.026e-06 9.807e-08
15-150 5.629e-06 1.696e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.79675 (-0.573268 0.572075)
R1^2/D10^2 : 7.13138 (-2.71353 5.52447)
kT2 [keV] : 13.3832 (-1.83404 2.57993)
R2^2/D10^2 : 5.46670E-02 (-0.031293 0.0605979)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.344e-06 2.993e-07
25- 50 2.242e-06 2.243e-07
50-150 1.230e-06 2.471e-07
15-150 5.816e-06 6.870e-07
Peak spectrum fit
Power-law model
Time interval is from 130.344 sec. to 131.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.31179 ( -0.296617 0.330642 )
Norm@50keV : 8.60452E-03 ( -0.0019053 0.00183667 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.17 using 59 PHA bins.
# Reduced chi-squared = 0.9854 for 57 degrees of freedom
# Null hypothesis probability = 5.062519e-01
Photon flux (15-150 keV) in 1 sec: 1.51364 ( -0.229344 0.229507 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.24072e-08 ( -1.45926e-08 1.5007e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 130.344 sec. to 131.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97593 ( )
Epeak [keV] : 2.86841 ( )
Norm@50keV : 1.36270E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.95 using 59 PHA bins.
# Reduced chi-squared = 0.9992 for 56 degrees of freedom
# Null hypothesis probability = 4.765699e-01
Photon flux (15-150 keV) in 1 sec: 1.49566 ( -0.23837 0.23773 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.99395e-08 ( -1.59751e-08 1.68739e-08 ) ergs/cm2
Band function
Time interval is from 130.344 sec. to 131.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.93390 ( 2.9339 2.9339 )
beta : -2.31179 ( -0.330625 0.296592 )
Epeak [keV] : 31.8156 ( -31.8156 -31.8156 )
Norm@50keV : 1.16948 ( -0.258957 0.24963 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.17 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Null hypothesis probability = 4.308697e-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] : 8.94428 (-1.58376 1.83238)
R^2/D10^2 : 1.03113 (-0.541217 1.22493)
(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 1.601e-08 4.505e-09
25- 50 3.370e-08 7.660e-09
50-150 1.261e-08 5.410e-09
15-150 6.232e-08 1.512e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.4886 (-14.0177 24.7687)
Norm : 9.19825 (-2.34698 3.43765)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.169e-08 4.245e-09
25- 50 2.954e-08 5.990e-09
50-150 2.498e-08 1.078e-08
15-150 7.621e-08 1.651e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.16873 (-1.28587 2.04337)
R1^2/D10^2 : 61.0437 (-54.4072 1631.43)
kT2 [keV] : 12.4269 (-2.79543 5.07174)
R2^2/D10^2 : 0.230258 (-0.184836 0.463775)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.344e-08 1.314e-08
25- 50 2.749e-08 1.506e-08
50-150 2.347e-08 1.476e-08
15-150 7.440e-08 3.734e-08
Plot creation:
Sun Sep 17 01:41:55 EDT 2023