batgrbproduct analysis for trigger=1192486
batgrbproduct Analysis for Trigger=1192486
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 Sep 19 02:04:11 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192486/GCN5_download_cron
======================================================================
Trigger: 01192486 Segment: 000
BAT Trigger Time: 716698816 [s; MET]
Trigger Stop: 716698880 [s; MET]
UTC: 2023-09-18T02:59:43.971280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.655789515405 Dec: 35.5394197914106 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 15.41
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.41
Flight Position: [ source = BAT ]
RA: 299.655789515405 Dec: 35.5394197914106 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.636861835209 Dec: 35.5452538704162 [deg; J2000]
{ 19h 58m 32.8s , +35d 32' 42.9" }
+/- 1.33497893359119 [arcmin] (estimated 90% radius based on SNR)
+/- 0.458112381865356 [arcmin] (formal 1-sigma fit error)
SNR: 20.1311794118389
Angular difference between Flight and Ground position is 0.988150 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.885346 0.989354 0.578255 0.123304
0.052873 0.054131 0.045374 0.038090 [error]
Peak 0.885346 0.989354 0.578255 0.123304
0.052873 0.054131 0.045374 0.038090 [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 2.56e-07 3.91e-07 4.49e-07 9.88e-07 1.39e-06 2.08e-06 erg/cm2
Error 2.54e-08 2.46e-08 4.38e-08 1.99e-07 1.01e-07 2.39e-07 erg/cm2
Peak flux Power-law 1.30e-01 1.09e-01 6.27e-02 5.36e-02 3.25e-01 3.55e-01 ph/cm2/s
Error 1.31e-02 6.94e-03 5.89e-03 1.00e-02 2.07e-02 2.23e-02 ph/cm2/s
Fluence Cutoff-PL 2.54e-07 3.95e-07 4.50e-07 8.60e-07 1.38e-06 1.96e-06 erg/cm2
Error 2.76e-08 2.92e-08 4.44e-08 3.62e-07 1.14e-07 3.33e-07 erg/cm2
Peak flux Cutoff-PL 1.28e-01 1.10e-01 6.29e-02 4.80e-02 3.24e-01 3.49e-01 ph/cm2/s
Error 1.44e-02 8.09e-03 5.96e-03 1.48e-02 2.15e-02 2.28e-02 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 1.800 0.117 - - 2.36e-03 1.67e-04 67.310 57
CPL 1.726 0.437 166.8 0.0 2.59e-03 0.00e+00 67.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.800 0.117 - - 2.36e-03 1.67e-04 67.310 57
CPL 1.726 0.437 166.8 0.0 2.59e-03 0.00e+00 67.210 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.6369 +35.5453 0.0095 0.1 -10.0 2.6386 20.1 TRIG_01192486
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80027 ( -0.116409 0.118476 )
Norm@50keV : 2.35839E-03 ( -0.000168086 0.00016621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.31 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 57 degrees of freedom
# Null hypothesis probability = 1.649711e-01
Photon flux (15-150 keV) in 64 sec: 0.325016 ( -0.0207048 0.0207215 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38952e-06 ( -1.00764e-07 1.0172e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72636 ( -0.438622 0.43494 )
Epeak [keV] : 166.758 ( )
Norm@50keV : 2.58950E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.21 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 56 degrees of freedom
# Null hypothesis probability = 1.450292e-01
Photon flux (15-150 keV) in 64 sec: 0.323808 ( -0.021619 0.02147 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3792e-06 ( -1.17094e-07 1.10547e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.72493 ( -4.72493 -4.72493 )
beta : -1.88328 ( -0.141033 0.134087 )
Epeak [keV] : 22.6836 ( -5.56695 3.34806 )
Norm@50keV : 365.933 ( -22.853 1.6935e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.04 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 55 degrees of freedom
# Null hypothesis probability = 1.667620e-01
Photon flux (15-150 keV) in 64 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] : 11.0285 ( )
R^2/D10^2 : 0.102644 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 138.71 using 59 PHA bins.
# Reduced chi-squared = 2.4335 for 57 degrees of freedom
# Null hypothesis probability = 9.191355e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.670e-07 2.029e-08
25- 50 4.739e-07 3.530e-08
50-150 3.262e-07 4.810e-08
15-150 9.671e-07 7.552e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8185 (-20.2586 38.9925)
Norm : 1.42655 (-0.137149 0.134851)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.386e-07 2.573e-08
25- 50 4.125e-07 3.245e-08
50-150 6.677e-07 2.073e-07
15-150 1.319e-06 2.275e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.73040 (-0.933712 0.987015)
R1^2/D10^2 : 0.502234 (-0.193565 0.361218)
kT2 [keV] : 28.3056 (-6.03336 10.2622)
R2^2/D10^2 : 2.45800E-03 (-0.00154608 0.0033124)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.446e-07 4.083e-08
25- 50 4.070e-07 7.062e-08
50-150 7.506e-07 2.609e-07
15-150 1.402e-06 3.475e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80027 ( -0.116409 0.118476 )
Norm@50keV : 2.35839E-03 ( -0.000168086 0.00016621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.31 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 57 degrees of freedom
# Null hypothesis probability = 1.649711e-01
Photon flux (15-150 keV) in 64 sec: 0.325016 ( -0.0207048 0.0207215 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38952e-06 ( -1.00764e-07 1.0172e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72636 ( -0.438622 0.43494 )
Epeak [keV] : 166.758 ( )
Norm@50keV : 2.58950E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.21 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 56 degrees of freedom
# Null hypothesis probability = 1.450292e-01
Photon flux (15-150 keV) in 64 sec: 0.323808 ( -0.021619 0.02147 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3792e-06 ( -1.17094e-07 1.10547e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.72493 ( -4.72493 -4.72493 )
beta : -1.88328 ( -0.141033 0.134087 )
Epeak [keV] : 22.6836 ( -5.56695 3.34806 )
Norm@50keV : 365.933 ( -22.853 1.6935e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.04 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 55 degrees of freedom
# Null hypothesis probability = 1.667620e-01
Photon flux (15-150 keV) in 64 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] : 11.0285 ( )
R^2/D10^2 : 0.102644 ( )
(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 1.670e-07 1.824e-08
25- 50 4.739e-07 3.648e-08
50-150 3.262e-07 5.440e-08
15-150 9.671e-07 7.072e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8185 (-20.2586 38.9925)
Norm : 1.42655 (-0.137149 0.134851)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.386e-07 2.678e-08
25- 50 4.125e-07 3.072e-08
50-150 6.677e-07 2.073e-07
15-150 1.319e-06 2.291e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.73040 (-0.933712 0.987015)
R1^2/D10^2 : 0.502234 (-0.193565 0.361218)
kT2 [keV] : 28.3056 (-6.03336 10.2622)
R2^2/D10^2 : 2.45800E-03 (-0.00154608 0.0033124)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.446e-07 4.592e-08
25- 50 4.070e-07 6.115e-08
50-150 7.506e-07 2.912e-07
15-150 1.402e-06 3.709e-07
Plot creation:
Tue Sep 19 02:05:59 EDT 2023