batgrbproduct analysis for trigger=1192233
batgrbproduct Analysis for Trigger=1192233
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 Sep 16 23:03:09 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192233/GCN5_download_cron
======================================================================
Trigger: 01192233 Segment: 000
BAT Trigger Time: 716524808 [s; MET]
Trigger Stop: 716524872 [s; MET]
UTC: 2023-09-16T02:39:35.983160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 261.811033656768 Dec: -16.3815049053509 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 23.45
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 23.45
Flight Position: [ source = BAT ]
RA: 261.811033656768 Dec: -16.3815049053509 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 261.80440577087 Dec: -16.365650492682 [deg; J2000]
{ 17h 27m 13.1s , -16d 21' 56.3" }
+/- 0.801359841723335 [arcmin] (estimated 90% radius based on SNR)
+/- 0.230547628412383 [arcmin] (formal 1-sigma fit error)
SNR: 41.7356862189954
Angular difference between Flight and Ground position is 1.024930 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 141.567999958992 +/- 42.7369075515168
Measured from: -42.8479999303818
to: 98.7200000286102 [s; relative to TRIGTIME]
T50: 59.5199998617172 +/- 56.3555615290157
Measured from: -25.5679998397827
to: 33.9520000219345 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 114.636000037193
to: 115.636000037193 [s; relative to TRIGTIME]
Total Fluence
Measured from: -46.944000005722
to: 115.616000056267 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.763530 6.613123 1.810198 0.240875
0.109576 0.096585 0.075494 0.064102 [error]
Peak 0.079611 0.067192 0.020505 0.005837
0.009045 0.007734 0.005862 0.005291 [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 3.15e-06 2.63e-06 1.49e-06 1.25e-06 7.82e-06 8.52e-06 erg/cm2
Error 1.51e-07 6.84e-08 7.48e-08 1.31e-07 2.04e-07 2.28e-07 erg/cm2
Peak flux Power-law 7.84e-01 4.59e-01 1.71e-01 8.43e-02 1.46e+00 1.50e+00 ph/cm2/s
Error 1.41e-01 6.31e-02 4.61e-02 4.23e-02 1.92e-01 1.97e-01 ph/cm2/s
Fluence Cutoff-PL 3.01e-06 2.68e-06 1.45e-06 7.33e-07 7.56e-06 7.86e-06 erg/cm2
Error 1.93e-07 8.02e-08 8.75e-08 3.28e-07 2.97e-07 4.89e-07 erg/cm2
Peak flux Cutoff-PL 7.63e-01 4.80e-01 1.64e-01 4.39e-02 1.44e+00 1.45e+00 ph/cm2/s
Error 1.56e-01 8.36e-02 5.44e-02 6.04e-02 2.01e-01 2.21e-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 2.820 0.065 - - 4.43e-03 1.52e-04 83.280 57
CPL 1.000 0.000 50.0 0.0 1.47e-02 0.00e+00 570.460 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.426 0.287 - - 7.77e-03 1.57e-03 51.480 57
CPL 1.955 0.000 3.6 0.0 1.51e-02 0.00e+00 51.150 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 162.560 -46.944 115.616
T90 141.568 -42.848 98.720
T50 59.520 -25.568 33.952
Peak 1.000 114.636 115.636
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
261.8044 -16.3657 0.0046 12.3 -61.7 9.8018 41.7 TRIG_01192233
------------------------------------------
Foreground time interval of the image:
-13.799 63.049 (delta_t = 76.849 [sec])
64.000 69.130 (delta_t = 5.130 [sec])
72.000 73.101 (delta_t = 1.101 [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
Multiple GTIs in the spectrum
tstart tstop
-46.944000 63.049200
64.000000 69.130000
72.000000 115.616000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.81955 ( -0.0647434 0.0655107 )
Norm@50keV : 4.43225E-03 ( -0.00015275 0.000151893 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.28 using 59 PHA bins.
# Reduced chi-squared = 1.461 for 57 degrees of freedom
# Null hypothesis probability = 1.316975e-02
Photon flux (15-150 keV) in 158.7 sec: 1.07252 ( -0.0364711 0.0369258 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.82345e-06 ( -2.04188e-07 2.04296e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-46.944000 63.049200
64.000000 69.130000
72.000000 115.616000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.46704E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 570.46 using 59 PHA bins.
# Reduced chi-squared = 10.187 for 56 degrees of freedom
# Null hypothesis probability = 2.643382e-86
Photon flux (15-150 keV) in 158.7 sec: 1.03792 ( -0.045575 0.04617 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.55596e-06 ( -2.9615e-07 2.98435e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-46.944000 63.049200
64.000000 69.130000
72.000000 115.616000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.75898 ( )
beta : -9.37167 ( )
Epeak [keV] : 18.8692 ( )
Norm@50keV : 9.81033E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 236.56 using 59 PHA bins.
# Reduced chi-squared = 4.3011 for 55 degrees of freedom
# Null hypothesis probability = 2.254951e-24
Photon flux (15-150 keV) in 158.7 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] : 8.08867 ( )
R^2/D10^2 : 0.878273 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 320.67 using 59 PHA bins.
# Reduced chi-squared = 5.6259 for 57 degrees of freedom
# Null hypothesis probability = 2.124991e-38
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.662e-06 8.173e-08
25- 50 2.965e-06 7.776e-08
50-150 8.073e-07 6.364e-08
15-150 5.435e-06 1.547e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.0198 (-1.69925 1.85283)
Norm : 7.87017 (-0.583873 0.636275)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.498e-06 1.135e-07
25- 50 2.802e-06 7.538e-08
50-150 1.468e-06 1.054e-07
15-150 6.768e-06 1.666e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.04175 (-0.431515 0.445277)
R1^2/D10^2 : 5.96354 (-1.84413 3.00033)
kT2 [keV] : 15.0333 (-1.60012 2.0684)
R2^2/D10^2 : 3.68720E-02 (-0.0165712 0.0263601)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.656e-06 2.182e-07
25- 50 2.688e-06 1.722e-07
50-150 1.764e-06 2.492e-07
15-150 7.108e-06 4.618e-07
Peak spectrum fit
Power-law model
Time interval is from 114.636 sec. to 115.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42627 ( -0.273545 0.300885 )
Norm@50keV : 7.76621E-03 ( -0.00159092 0.00155377 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.48 using 59 PHA bins.
# Reduced chi-squared = 0.9031 for 57 degrees of freedom
# Null hypothesis probability = 6.814430e-01
Photon flux (15-150 keV) in 1 sec: 1.45934 ( -0.192373 0.192474 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.62212e-08 ( -1.1797e-08 1.21636e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 114.636 sec. to 115.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95482 ( )
Epeak [keV] : 3.60775 ( )
Norm@50keV : 1.51268E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.15 using 59 PHA bins.
# Reduced chi-squared = 0.9134 for 56 degrees of freedom
# Null hypothesis probability = 6.585962e-01
Photon flux (15-150 keV) in 1 sec: 1.43716 ( -0.20171 0.20041 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.30541e-08 ( -1.33445e-08 1.44833e-08 ) ergs/cm2
Band function
Time interval is from 114.636 sec. to 115.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.89888 ( 1.77304 1.77304 )
beta : -2.91432 ( 3.02211 0.852487 )
Epeak [keV] : 7.13910 ( -7.1379 48.0546 )
Norm@50keV : 1.64071E-02 ( -0.00471944 1.23521 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.09 using 59 PHA bins.
# Reduced chi-squared = 0.9289 for 55 degrees of freedom
# Null hypothesis probability = 6.246827e-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] : 7.94452 (-1.18011 1.3544)
R^2/D10^2 : 1.58686 (-0.759558 1.51682)
(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 1.802e-08 4.505e-09
25- 50 3.115e-08 6.795e-09
50-150 7.995e-09 3.393e-09
15-150 5.717e-08 1.320e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.1172 (-10.0917 15.9525)
Norm : 10.0067 (-2.49976 3.54398)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.214e-08 4.230e-09
25- 50 2.782e-08 4.785e-09
50-150 1.917e-08 7.950e-09
15-150 6.913e-08 1.354e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.57583 (-1.87197 2.32947)
R1^2/D10^2 : 31.5816 (-27.4191 3448.62)
kT2 [keV] : 11.7110 (-3.07798 8.19692)
R2^2/D10^2 : 0.249802 (-0.221937 0.253906)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.347e-08 1.257e-08
25- 50 2.631e-08 1.408e-08
50-150 1.795e-08 1.095e-08
15-150 6.772e-08 3.457e-08
Plot creation:
Sat Sep 16 23:05:09 EDT 2023