batgrbproduct analysis for trigger=1192488
batgrbproduct Analysis for Trigger=1192488
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 01:57:33 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192488/GCN5_download_cron
======================================================================
Trigger: 01192488 Segment: 000
BAT Trigger Time: 716699768 [s; MET]
Trigger Stop: 716699832 [s; MET]
UTC: 2023-09-18T03:15:35.971220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.3362736922503 Dec: 21.2895347997652 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 15.57
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.57
Flight Position: [ source = BAT ]
RA: 83.3362736922503 Dec: 21.2895347997652 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.3513609105675 Dec: 21.2814442840478 [deg; J2000]
{ 05h 33m 24.3s , +21d 16' 53.2" }
+/- 1.34507199686279 [arcmin] (estimated 90% radius based on SNR)
+/- 0.454666979875777 [arcmin] (formal 1-sigma fit error)
SNR: 19.9157282906764
Angular difference between Flight and Ground position is 0.973192 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 1.058191 0.930228 0.467941 0.115630
0.052634 0.053494 0.044848 0.037686 [error]
Peak 1.058191 0.930228 0.467941 0.115630
0.052634 0.053494 0.044848 0.037686 [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 3.01e-07 3.84e-07 3.58e-07 5.85e-07 1.24e-06 1.63e-06 erg/cm2
Error 2.98e-08 2.51e-08 4.32e-08 1.42e-07 9.57e-08 1.87e-07 erg/cm2
Peak flux Power-law 1.54e-01 1.09e-01 5.06e-02 3.30e-02 3.29e-01 3.46e-01 ph/cm2/s
Error 1.55e-02 7.04e-03 5.87e-03 7.46e-03 2.17e-02 2.24e-02 ph/cm2/s
Fluence Cutoff-PL 3.03e-07 3.84e-07 3.55e-07 5.69e-07 1.24e-06 1.61e-06 erg/cm2
Error 2.96e-08 1.93e-08 4.34e-08 2.14e-07 9.73e-08 2.48e-07 erg/cm2
Peak flux Cutoff-PL 1.54e-01 1.09e-01 5.05e-02 3.27e-02 3.29e-01 3.46e-01 ph/cm2/s
Error -------- -------- -------- -------- 2.17e-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 2.103 0.137 - - 2.09e-03 1.78e-04 47.320 57
CPL 2.237 0.161 103.2 0.0 1.76e-03 0.00e+00 46.810 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.103 0.137 - - 2.09e-03 1.78e-04 47.320 57
CPL 2.237 0.161 103.2 0.0 1.76e-03 0.00e+00 46.810 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
83.3514 +21.2814 0.0097 0.1 -19.5 2.5597 19.9 TRIG_01192488
------------------------------------------
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: 2.10297 ( -0.134361 0.139167 )
Norm@50keV : 2.08710E-03 ( -0.00017932 0.000176035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8301 for 57 degrees of freedom
# Null hypothesis probability = 8.160844e-01
Photon flux (15-150 keV) in 64 sec: 0.328836 ( -0.0216745 0.0217056 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24141e-06 ( -9.50259e-08 9.63437e-08 ) 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: 2.23712 ( -0.273972 0.0471342 )
Epeak [keV] : 103.229 ( )
Norm@50keV : 1.76106E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.81 using 59 PHA bins.
# Reduced chi-squared = 0.8359 for 56 degrees of freedom
# Null hypothesis probability = 8.043063e-01
Photon flux (15-150 keV) in 64 sec: 0.328697 ( -0.02167 0.021682 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23693e-06 ( -9.35552e-08 1.01018e-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 : -1.49298 ( 1.48518 1.48518 )
beta : -2.12466 ( 2.12575 0.153438 )
Epeak [keV] : 20.4845 ( -20.4298 23.5286 )
Norm@50keV : 5.99826E-03 ( -0.00625884 828856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.18 using 59 PHA bins.
# Reduced chi-squared = 0.8578 for 55 degrees of freedom
# Null hypothesis probability = 7.642741e-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] : 9.01233 ( )
R^2/D10^2 : 0.212426 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 117.77 using 59 PHA bins.
# Reduced chi-squared = 2.0662 for 57 degrees of freedom
# Null hypothesis probability = 4.029779e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.151e-07 2.330e-08
25- 50 4.583e-07 3.757e-08
50-150 1.756e-07 3.398e-08
15-150 8.490e-07 6.656e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.1516 (-11.612 15.965)
Norm : 1.69154 (-0.203832 0.223098)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.714e-07 2.445e-08
25- 50 4.113e-07 2.797e-08
50-150 4.625e-07 8.166e-08
15-150 1.145e-06 9.120e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.73069 (-0.847361 0.895201)
R1^2/D10^2 : 1.04188 (-0.445132 0.929872)
kT2 [keV] : 24.0587 (-5.54671 9.77673)
R2^2/D10^2 : 3.58212E-03 (-0.00243144 0.00595138)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.951e-07 5.670e-08
25- 50 3.754e-07 6.346e-08
50-150 5.823e-07 2.990e-07
15-150 1.253e-06 3.024e-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: 2.10297 ( -0.134361 0.139167 )
Norm@50keV : 2.08710E-03 ( -0.00017932 0.000176035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8301 for 57 degrees of freedom
# Null hypothesis probability = 8.160844e-01
Photon flux (15-150 keV) in 64 sec: 0.328836 ( -0.0216745 0.0217056 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24141e-06 ( -9.50259e-08 9.63437e-08 ) 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: 2.23712 ( -0.273972 0.0471342 )
Epeak [keV] : 103.229 ( )
Norm@50keV : 1.76106E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.81 using 59 PHA bins.
# Reduced chi-squared = 0.8359 for 56 degrees of freedom
# Null hypothesis probability = 8.043063e-01
Photon flux (15-150 keV) in 64 sec: 0.328697 ( -0.02167 0.021682 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23693e-06 ( -9.35552e-08 1.01018e-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 : -1.49298 ( 1.48518 1.48518 )
beta : -2.12466 ( 2.12575 0.153438 )
Epeak [keV] : 20.4845 ( -20.4298 23.5286 )
Norm@50keV : 5.99826E-03 ( -0.00625884 828856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.18 using 59 PHA bins.
# Reduced chi-squared = 0.8578 for 55 degrees of freedom
# Null hypothesis probability = 7.642741e-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] : 9.01233 ( )
R^2/D10^2 : 0.212426 ( )
(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 2.151e-07 2.429e-08
25- 50 4.583e-07 3.661e-08
50-150 1.756e-07 3.478e-08
15-150 8.490e-07 7.360e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.1516 (-11.612 15.965)
Norm : 1.69154 (-0.203832 0.223098)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.714e-07 2.646e-08
25- 50 4.113e-07 2.902e-08
50-150 4.625e-07 7.770e-08
15-150 1.145e-06 9.920e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.73069 (-0.847361 0.895201)
R1^2/D10^2 : 1.04188 (-0.445132 0.929872)
kT2 [keV] : 24.0587 (-5.54671 9.77673)
R2^2/D10^2 : 3.58212E-03 (-0.00243144 0.00595138)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.951e-07 5.174e-08
25- 50 3.754e-07 6.589e-08
50-150 5.823e-07 2.488e-07
15-150 1.253e-06 3.069e-07
Plot creation:
Tue Sep 19 01:59:18 EDT 2023