batgrbproduct analysis for trigger=1192490
batgrbproduct Analysis for Trigger=1192490
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 01:54:09 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192490/GCN5_download_cron
======================================================================
Trigger: 01192490 Segment: 000
BAT Trigger Time: 716701608 [s; MET]
Trigger Stop: 716701672 [s; MET]
UTC: 2023-09-18T03:46:15.971080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 261.905054304247 Dec: -15.142361260055 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 21.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 21.28
Flight Position: [ source = BAT ]
RA: 261.905054304247 Dec: -15.142361260055 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 261.901327962566 Dec: -15.1374453279434 [deg; J2000]
{ 17h 27m 36.3s , -15d 08' 14.8" }
+/- 1.00085332046746 [arcmin] (estimated 90% radius based on SNR)
+/- 0.323794583230436 [arcmin] (formal 1-sigma fit error)
SNR: 30.3800992307059
Angular difference between Flight and Ground position is 0.365482 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 3.344330 2.064181 0.541378 0.045289
0.071207 0.061537 0.048285 0.041494 [error]
Peak 3.344330 2.064181 0.541378 0.045289
0.071207 0.061537 0.048285 0.041494 [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 1.04e-06 8.05e-07 4.19e-07 3.15e-07 2.41e-06 2.58e-06 erg/cm2
Error 6.82e-08 3.50e-08 4.09e-08 6.00e-08 1.01e-07 1.20e-07 erg/cm2
Peak flux Power-law 5.40e-01 2.35e-01 6.12e-02 1.96e-02 8.48e-01 8.56e-01 ph/cm2/s
Error 3.64e-02 9.98e-03 5.75e-03 3.50e-03 4.03e-02 3.99e-02 ph/cm2/s
Fluence Cutoff-PL 1.02e-06 8.18e-07 4.00e-07 1.95e-07 2.35e-06 2.43e-06 erg/cm2
Error 7.90e-08 4.25e-08 5.62e-08 1.12e-07 1.46e-07 1.59e-07 erg/cm2
Peak flux Cutoff-PL 5.27e-01 2.39e-01 5.89e-02 1.32e-02 8.34e-01 8.38e-01 ph/cm2/s
Error 4.30e-02 1.21e-02 7.09e-03 9.63e-03 4.73e-02 5.02e-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 2.943 0.109 - - 3.21e-03 2.21e-04 56.470 57
CPL 1.984 -0.891 0.6 0.1 1.23e-02 1.16e-03 60.810 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.943 0.109 - - 3.21e-03 2.21e-04 56.470 57
CPL 1.984 -0.891 0.6 0.1 1.23e-02 1.16e-03 60.810 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
261.9013 -15.1374 0.0063 1.1 -4.2 5.9835 30.4 TRIG_01192490
------------------------------------------
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: 2.94285 ( -0.107674 0.110557 )
Norm@50keV : 3.21245E-03 ( -0.000220983 0.000220606 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.47 using 59 PHA bins.
# Reduced chi-squared = 0.9906 for 57 degrees of freedom
# Null hypothesis probability = 4.951013e-01
Photon flux (15-150 keV) in 64 sec: 0.847738 ( -0.0401648 0.0405293 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40755e-06 ( -1.01245e-07 1.01469e-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: 1.98434 ( -0.203147 -1.98434 )
Epeak [keV] : 0.592729 ( -0.0783067 0.0937509 )
Norm@50keV : 1.22758E-02 ( -0.000567854 0.00175046 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.81 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 56 degrees of freedom
# Null hypothesis probability = 3.067725e-01
Photon flux (15-150 keV) in 64 sec: 0.834042 ( -0.047402 0.047264 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.34877e-06 ( -1.46336e-07 1.44704e-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 : -1.67906 ( -0.973861 0.69107 )
beta : -3.10888 ( -0.259471 0.188653 )
Epeak [keV] : 7.42441 ( -2.97926 11.3976 )
Norm@50keV : 2.35533E-02 ( -0.0117086 3874.68 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.35 using 59 PHA bins.
# Reduced chi-squared = 0.9518 for 55 degrees of freedom
# Null hypothesis probability = 5.766030e-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] : 6.66041 ( )
R^2/D10^2 : 1.68441 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 140.09 using 59 PHA bins.
# Reduced chi-squared = 2.4577 for 57 degrees of freedom
# Null hypothesis probability = 6.018375e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.275e-07 5.344e-08
25- 50 9.030e-07 4.448e-08
50-150 1.246e-07 2.192e-08
15-150 1.755e-06 8.480e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.9437 (-2.10435 2.39249)
Norm : 8.12977 (-0.995725 1.16086)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.986e-07 6.016e-08
25- 50 8.698e-07 3.872e-08
50-150 3.250e-07 4.685e-08
15-150 2.093e-06 9.888e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.98914 (-0.503607 0.476559)
R1^2/D10^2 : 5.56297 (-1.85827 3.40152)
kT2 [keV] : 16.7830 (-3.35887 4.73199)
R2^2/D10^2 : 1.58119E-02 (-0.0101234 0.0272202)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.166e-07 1.008e-07
25- 50 8.127e-07 1.015e-07
50-150 5.333e-07 2.001e-07
15-150 2.263e-06 3.619e-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: 2.94285 ( -0.107674 0.110557 )
Norm@50keV : 3.21245E-03 ( -0.000220983 0.000220606 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.47 using 59 PHA bins.
# Reduced chi-squared = 0.9906 for 57 degrees of freedom
# Null hypothesis probability = 4.951013e-01
Photon flux (15-150 keV) in 64 sec: 0.847738 ( -0.0401648 0.0405293 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40755e-06 ( -1.01245e-07 1.01469e-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: 1.98434 ( -0.203147 -1.98434 )
Epeak [keV] : 0.592729 ( -0.0783067 0.0937509 )
Norm@50keV : 1.22758E-02 ( -0.000567854 0.00175046 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.81 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 56 degrees of freedom
# Null hypothesis probability = 3.067725e-01
Photon flux (15-150 keV) in 64 sec: 0.834042 ( -0.047402 0.047264 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.34877e-06 ( -1.46336e-07 1.44704e-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 : -1.56652 ( -1.43552 3.3852 )
beta : -3.11983 ( -0.257269 0.200752 )
Epeak [keV] : 9.20480 ( -4.10709 9.89699 )
Norm@50keV : 2.81179E-02 ( -0.0156574 3743.53 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.34 using 59 PHA bins.
# Reduced chi-squared = 0.9517 for 55 degrees of freedom
# Null hypothesis probability = 5.768156e-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] : 6.66041 ( )
R^2/D10^2 : 1.68441 ( )
(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 7.275e-07 5.696e-08
25- 50 9.030e-07 4.480e-08
50-150 1.246e-07 2.045e-08
15-150 1.755e-06 8.512e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.9437 (-2.10435 2.39249)
Norm : 8.12977 (-0.995725 1.16086)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.986e-07 5.632e-08
25- 50 8.698e-07 4.288e-08
50-150 3.250e-07 5.050e-08
15-150 2.093e-06 8.896e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.98914 (-0.503607 0.476559)
R1^2/D10^2 : 5.56297 (-1.85827 3.40152)
kT2 [keV] : 16.7830 (-3.35887 4.73199)
R2^2/D10^2 : 1.58119E-02 (-0.0101234 0.0272202)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.166e-07 1.024e-07
25- 50 8.127e-07 1.018e-07
50-150 5.333e-07 2.380e-07
15-150 2.263e-06 3.299e-07
Plot creation:
Tue Sep 19 01:56:04 EDT 2023