batgrbproduct analysis for trigger=1163119
batgrbproduct Analysis for Trigger=1163119
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 6 21:24:16 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1163119/GCN5_download_cron
======================================================================
Trigger: 01163119 Segment: 000
BAT Trigger Time: 702417514.56 [s; MET]
Trigger Stop: 702417515.072 [s; MET]
UTC: 2023-04-05T19:58:03.507020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.467274097228 Dec: -47.0704638653042 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.59
Image Trigger?: NO
Rate S/N Ratio: 22.9128784747792 [ if not an image trigger ]
Image S/N Ratio: 9.59
Flight Position: [ source = BAT ]
RA: 271.467274097228 Dec: -47.0704638653042 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 271.436276873485 Dec: -47.0716709094021 [deg; J2000]
{ 18h 05m 44.7s , -47d 04' 18.0" }
+/- 0.782638578934948 [arcmin] (estimated 90% radius based on SNR)
+/- 0.248751372519975 [arcmin] (formal 1-sigma fit error)
SNR: 43.1691735430583
Angular difference between Flight and Ground position is 1.268784 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 14.135999917984 +/- 5.59268845486081
Measured from: -7.01199984550476
to: 7.12400007247925 [s; relative to TRIGTIME]
T50: 1.85199999809265 +/- 0.167475413189009
Measured from: 1.51600015163422
to: 3.36800014972687 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.91600000858307
to: 2.91600000858307 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.0319999456406
to: 12.6560000181198 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.230514 2.135315 1.878559 0.564500
0.059855 0.057780 0.050983 0.039580 [error]
Peak 0.312170 0.639511 0.739691 0.234505
0.015844 0.019923 0.021440 0.014702 [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 3.69e-07 8.11e-07 1.41e-06 5.65e-06 3.85e-06 8.24e-06 erg/cm2
Error 2.41e-08 3.09e-08 4.97e-08 4.69e-07 1.27e-07 4.91e-07 erg/cm2
Peak flux Power-law 2.88e+00 4.20e+00 4.56e+00 9.24e+00 1.45e+01 2.09e+01 ph/cm2/s
Error 2.02e-01 1.78e-01 1.64e-01 7.23e-01 4.90e-01 8.15e-01 ph/cm2/s
Fluence Cutoff-PL 3.46e-07 8.23e-07 1.44e-06 4.06e-06 3.79e-06 6.67e-06 erg/cm2
Error 3.11e-08 3.31e-08 5.85e-08 8.60e-07 1.37e-07 1.16e-06 erg/cm2
Peak flux Cutoff-PL 2.53e+00 4.28e+00 4.82e+00 6.06e+00 1.43e+01 1.77e+01 ph/cm2/s
Error 2.60e-01 1.91e-01 2.14e-01 1.30e+00 5.04e-01 1.38e+00 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 1.207 0.057 - - 1.20e-02 3.73e-04 60.770 57
CPL 0.954 0.231 235.7 474.5 1.55e-02 3.58e-03 57.060 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.883 0.058 - - 1.26e-01 4.27e-03 44.490 57
CPL 0.426 0.246 205.6 102.1 1.98e-01 4.74e-02 33.370 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: 4.480000 sec.
T50 in the 50-300 keV band: 1.280000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 31.688 -19.032 12.656
T90 14.136 -7.012 7.124
T50 1.852 1.516 3.368
Peak 1.000 1.916 2.916
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
271.4363 -47.0717 0.0045 11.1 -102.9 5.8414 43.2 TRIG_01163119
------------------------------------------
Foreground time interval of the image:
-19.032 9.641 (delta_t = 28.673 [sec])
Background time interval of the image:
-239.560 -210.620 (delta_t = 28.940 [sec])
-209.560 -159.210 (delta_t = 50.350 [sec])
-158.560 -45.150 (delta_t = 113.410 [sec])
-43.560 -35.360 (delta_t = 8.200 [sec])
-34.560 -24.450 (delta_t = 10.110 [sec])
-23.560 -21.750 (delta_t = 1.810 [sec])
-20.560 -19.032 (delta_t = 1.528 [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 -19.032 sec. to 12.656 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20712 ( -0.0575192 0.0571824 )
Norm@50keV : 1.19879E-02 ( -0.000373298 0.000373063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.77 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.417036e-01
Photon flux (15-150 keV) in 31.69 sec: 1.40855 ( -0.0468394 0.0469518 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.8465e-06 ( -1.26692e-07 1.26913e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -19.032 sec. to 12.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.953973 ( -0.237503 0.224598 )
Epeak [keV] : 235.707 ( -86.3663 862.603 )
Norm@50keV : 1.55246E-02 ( -0.00305428 0.00411095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.06 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 56 degrees of freedom
# Null hypothesis probability = 4.356037e-01
Photon flux (15-150 keV) in 31.69 sec: 1.38676 ( -0.05036 0.05047 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.79196e-06 ( -1.37471e-07 1.36837e-07 ) ergs/cm2
Band function
Time interval is from -19.032 sec. to 12.656 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.993230 ( -2.03687 -0.994645 )
beta : -1.26427 ( 1.26427 0.0734831 )
Epeak [keV] : 39.7440 ( -13.2538 68.4002 )
Norm@50keV : 0.371335 ( -0.374844 227.073 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.23 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Null hypothesis probability = 4.659500e-01
Photon flux (15-150 keV) in 31.69 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] : 19.9764 ( )
R^2/D10^2 : 6.37288E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 223.12 using 59 PHA bins.
# Reduced chi-squared = 3.9144 for 57 degrees of freedom
# Null hypothesis probability = 1.656619e-21
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.554e-07 1.036e-08
25- 50 7.736e-07 3.660e-08
50-150 2.288e-06 1.147e-07
15-150 3.217e-06 1.139e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 5.98309 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.721e-07 1.711e-08
25- 50 9.082e-07 3.042e-08
50-150 1.992e-06 6.623e-08
15-150 3.372e-06 1.125e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.27027 (-1.13756 1.32973)
R1^2/D10^2 : 0.657996 (-0.235793 0.400218)
kT2 [keV] : 31.8634 (-3.67326 5.73248)
R2^2/D10^2 : 1.16117E-02 (-0.00491488 0.00611075)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.203e-07 4.015e-08
25- 50 8.448e-07 7.035e-08
50-150 2.628e-06 2.686e-07
15-150 3.793e-06 3.423e-07
Peak spectrum fit
Power-law model
Time interval is from 1.916 sec. to 2.916 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.882575 ( -0.0583175 0.057956 )
Norm@50keV : 0.126192 ( -0.00427091 0.00426553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.49 using 59 PHA bins.
# Reduced chi-squared = 0.7806 for 57 degrees of freedom
# Null hypothesis probability = 8.861569e-01
Photon flux (15-150 keV) in 1 sec: 14.4828 ( -0.489844 0.490028 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4259e-06 ( -5.26437e-08 5.27458e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.916 sec. to 2.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.426062 ( -0.253065 0.239215 )
Epeak [keV] : 205.594 ( -52.2011 151.97 )
Norm@50keV : 0.198165 ( -0.0407207 0.0541743 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.37 using 59 PHA bins.
# Reduced chi-squared = 0.5959 for 56 degrees of freedom
# Null hypothesis probability = 9.929868e-01
Photon flux (15-150 keV) in 1 sec: 14.2507 ( -0.5036 0.5036 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40323e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 1.916 sec. to 2.916 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99997 ( -0.000102185 -4.99997 )
beta : -0.926110 ( -0.0639332 0.0635053 )
Epeak [keV] : 29.0409 ( -8.53144 4.77766 )
Norm@50keV : 3232.82 ( -107.166 20712.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.08 using 59 PHA bins.
# Reduced chi-squared = 0.7469 for 55 degrees of freedom
# Null hypothesis probability = 9.183646e-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] : 23.8333 ( )
R^2/D10^2 : 0.423425 ( )
(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 4.283e-08 2.855e-09
25- 50 2.370e-07 1.185e-08
50-150 1.003e-06 5.395e-08
15-150 1.283e-06 5.300e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 56.3617 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.404e-07 5.600e-09
25- 50 2.700e-07 9.800e-09
50-150 5.921e-07 2.315e-08
15-150 1.002e-06 3.705e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.16295 (-1.70719 2.05513)
R1^2/D10^2 : 3.46397 (-1.39816 2.79979)
kT2 [keV] : 34.9370 (-4.15231 6.94373)
R2^2/D10^2 : 0.114082 (-0.0504043 0.0590699)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.688e-08 1.095e-08
25- 50 2.539e-07 2.915e-08
50-150 1.082e-06 1.322e-07
15-150 1.413e-06 1.575e-07
Plot creation:
Thu Apr 6 21:27:15 EDT 2023