batgrbproduct analysis for trigger=1183217
batgrbproduct Analysis for Trigger=1183217
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): Mon Aug 7 12:08:47 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1183217/GCN5_download_cron
======================================================================
Trigger: 01183217 Segment: 000
BAT Trigger Time: 712927462.848 [s; MET]
Trigger Stop: 712927471.04 [s; MET]
UTC: 2023-08-05T11:23:51.076980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 207.746617283295 Dec: 31.1848044696489 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.49
Image Trigger?: NO
Rate S/N Ratio: 10.6301458127346 [ if not an image trigger ]
Image S/N Ratio: 8.49
Flight Position: [ source = BAT ]
RA: 207.746617283295 Dec: 31.1848044696489 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 207.738340186432 Dec: 31.1897089229703 [deg; J2000]
{ 13h 50m 57.2s , +31d 11' 23.0" }
+/- 2.14721748363936 [arcmin] (estimated 90% radius based on SNR)
+/- 1.00033564586289 [arcmin] (formal 1-sigma fit error)
SNR: 10.2096242529042
Angular difference between Flight and Ground position is 0.516811 arcmin
Partial Coding Fraction: 0.4179688 [ including projection effects ]
Duration
T90: 93.7679998874664 +/- 18.8252266075519
Measured from: -17.4079998731613
to: 76.3600000143051 [s; relative to TRIGTIME]
T50: 45.8119999170303 +/- 14.6373180495996
Measured from: 8.44000005722046
to: 54.2519999742508 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -17.6560000181198
to: -16.6560000181198 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.6040000915527
to: 103.271999955177 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.612643 1.047902 0.815492 0.297949
0.103902 0.109697 0.098083 0.085260 [error]
Peak 0.007297 0.043250 0.077150 0.020904
0.010339 0.011176 0.010974 0.008789 [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 2.14e-07 4.29e-07 6.71e-07 2.31e-06 1.87e-06 3.63e-06 erg/cm2
Error 4.66e-08 5.68e-08 9.21e-08 7.01e-07 2.31e-07 7.57e-07 erg/cm2
Peak flux Power-law 1.97e-01 3.20e-01 3.92e-01 9.49e-01 1.18e+00 1.86e+00 ph/cm2/s
Error 9.69e-02 1.01e-01 7.96e-02 3.77e-01 2.68e-01 4.06e-01 ph/cm2/s
Fluence Cutoff-PL 2.11e-07 4.34e-07 6.77e-07 1.99e-06 1.86e-06 3.31e-06 erg/cm2
Error 5.30e-08 6.41e-08 1.01e-07 1.34e-06 2.43e-07 1.16e-06 erg/cm2
Peak flux Cutoff-PL 9.23e-02 3.08e-01 4.97e-01 3.20e-01 1.11e+00 1.22e+00 ph/cm2/s
Error 1.09e-01 1.28e-01 1.20e-01 3.28e-01 2.66e-01 4.17e-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 1.356 0.199 - - 1.56e-03 1.80e-04 62.480 57
CPL 1.259 0.587 395.0 0.0 1.74e-03 1.39e-03 62.420 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.704 0.348 - - 1.02e-02 2.46e-03 62.960 57
CPL -1.357 2.452 107.4 124.0 6.03e-02 3.02e-01 58.800 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: 56.960000 sec.
T50 in the 50-300 keV band: 19.328000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 124.876 -21.604 103.272
T90 93.768 -17.408 76.360
T50 45.812 8.440 54.252
Peak 1.000 -17.656 -16.656
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
207.7383 +31.1897 0.0188 43.6 1.0 2.7999 10.2 TRIG_01183217
------------------------------------------
Foreground time interval of the image:
-21.604 -11.378 (delta_t = 10.226 [sec])
-10.848 26.032 (delta_t = 36.880 [sec])
27.152 73.353 (delta_t = 46.201 [sec])
Background time interval of the image:
-60.848 -44.738 (delta_t = 16.110 [sec])
-43.848 -21.604 (delta_t = 22.244 [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
-21.604000 -11.378000
-10.848000 26.032000
27.152000 103.272000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35649 ( -0.201444 0.197498 )
Norm@50keV : 1.55658E-03 ( -0.000180121 0.000180121 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.48 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.879269e-01
Photon flux (15-150 keV) in 123.2 sec: 0.187775 ( -0.0230213 0.0231106 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87027e-06 ( -2.30858e-07 2.31986e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-21.604000 -11.378000
-10.848000 26.032000
27.152000 103.272000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25858 ( -0.792166 0.381227 )
Epeak [keV] : 395.021 ( -395.071 -395.071 )
Norm@50keV : 1.74048E-03 ( -0.000346388 0.00243506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.42 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 56 degrees of freedom
# Null hypothesis probability = 2.586447e-01
Photon flux (15-150 keV) in 123.2 sec: 0.187132 ( -0.023399 0.023438 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.86037e-06 ( -2.47213e-07 2.3939e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-21.604000 -11.378000
-10.848000 26.032000
27.152000 103.272000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.73553 -5 )
beta : -1.54576 ( -0.264028 0.246455 )
Epeak [keV] : 29.2218 ( -7.08986 5.18625 )
Norm@50keV : 59.7282 ( -6.81813 260.533 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.09 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 3.975002e-01
Photon flux (15-150 keV) in 123.2 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] : 16.6494 (-2.57171 3.20887)
R^2/D10^2 : 1.51493E-02 (-0.00690187 0.0120969)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.07 using 59 PHA bins.
# Reduced chi-squared = 1.457 for 57 degrees of freedom
# Null hypothesis probability = 1.370343e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.060e-07 2.627e-08
25- 50 4.610e-07 7.823e-08
50-150 9.061e-07 2.012e-07
15-150 1.473e-06 2.412e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-46.4607 -200)
Norm : 0.787997 (-0.0918468 0.0918468)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.418e-07 8.883e-08
25- 50 4.651e-07 2.555e-07
50-150 1.020e-06 5.543e-07
15-150 1.727e-06 9.474e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.61452 (-2.16957 2.8293)
R1^2/D10^2 : 0.108729 (-0.0634417 0.169316)
kT2 [keV] : 43.0086 (-17.2791 -44.1146)
R2^2/D10^2 : 5.26572E-04 (-0.000422043 0.00188076)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.036e-07 1.010e-07
25- 50 4.766e-07 2.226e-07
50-150 1.190e-06 6.373e-07
15-150 1.870e-06 8.760e-07
Peak spectrum fit
Power-law model
Time interval is from -17.656 sec. to -16.656 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.704297 ( -0.36922 0.327592 )
Norm@50keV : 1.02015E-02 ( -0.00249948 0.00242032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.96 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 57 degrees of freedom
# Null hypothesis probability = 2.736436e-01
Photon flux (15-150 keV) in 1 sec: 1.17879 ( -0.264857 0.270404 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24283e-07 ( -2.53579e-08 2.53847e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -17.656 sec. to -16.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.35668 ( -3.12719 1.77655 )
Epeak [keV] : 107.413 ( -27.8 220.246 )
Norm@50keV : 6.02571E-02 ( -0.0602451 0.543809 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 56 degrees of freedom
# Null hypothesis probability = 3.732036e-01
Photon flux (15-150 keV) in 1 sec: 1.11419 ( -0.260958 0.2716 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21391e-07 ( -2.70427e-08 2.6518e-08 ) ergs/cm2
Band function
Time interval is from -17.656 sec. to -16.656 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.35637 ( -0.766645 2.25584 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 107.400 ( -22.332 219.764 )
Norm@50keV : 6.02699E-02 ( -0.0118506 0.543604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.380293e-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] : 27.1408 (-5.54684 8.58881)
R^2/D10^2 : 2.56890E-02 (-0.0145381 0.0270277)
(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 3.142e-09 1.554e-09
25- 50 1.855e-08 8.181e-09
50-150 9.969e-08 3.986e-08
15-150 1.214e-07 4.366e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-42.7015 -200)
Norm : 4.91581 (-1.16236 1.16236)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.224e-08 7.390e-09
25- 50 2.354e-08 1.384e-08
50-150 5.163e-08 2.997e-08
15-150 8.742e-08 5.200e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 4.79384E-05 (-4.79365e-05 -4.79365e-05)
kT2 [keV] : 25.0116 (-8.77482 10.5529)
R2^2/D10^2 : 3.01184E-02 (-0.0188061 0.0220782)
------------------------------------------------------------
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:
Mon Aug 7 12:16:42 EDT 2023