batgrbproduct analysis for trigger=1192483
batgrbproduct Analysis for Trigger=1192483
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 01:28:09 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192483/GCN5_download_cron
======================================================================
Trigger: 01192483 Segment: 000
BAT Trigger Time: 716697664 [s; MET]
Trigger Stop: 716697728 [s; MET]
UTC: 2023-09-18T02:40:31.971360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 261.583467326345 Dec: -15.90033862861 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 21.31
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 21.31
Flight Position: [ source = BAT ]
RA: 261.583467326345 Dec: -15.90033862861 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 261.571286222229 Dec: -15.8882509462742 [deg; J2000]
{ 17h 26m 17.1s , -15d 53' 17.7" }
+/- 1.04967451668822 [arcmin] (estimated 90% radius based on SNR)
+/- 0.37562959719647 [arcmin] (formal 1-sigma fit error)
SNR: 28.3818240335773
Angular difference between Flight and Ground position is 1.010003 arcmin
Partial Coding Fraction: 0.734375 [ 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 3.146127 2.039721 0.545704 0.192842
0.078998 0.067775 0.053589 0.045170 [error]
Peak 3.146127 2.039721 0.545704 0.192842
0.078998 0.067775 0.053589 0.045170 [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 9.90e-07 8.22e-07 4.63e-07 3.85e-07 2.45e-06 2.66e-06 erg/cm2
Error 7.08e-08 3.85e-08 4.82e-08 7.89e-08 1.13e-07 1.42e-07 erg/cm2
Peak flux Power-law 5.30e-01 2.47e-01 6.94e-02 2.45e-02 8.60e-01 8.70e-01 ph/cm2/s
Error 3.89e-02 1.13e-02 6.95e-03 4.68e-03 4.36e-02 4.30e-02 ph/cm2/s
Fluence Cutoff-PL 9.90e-07 8.22e-07 4.63e-07 3.83e-07 2.44e-06 2.66e-06 erg/cm2
Error 7.66e-08 4.33e-08 5.60e-08 -------- 1.13e-07 2.33e-07 erg/cm2
Peak flux Cutoff-PL 5.30e-01 2.47e-01 6.94e-02 2.43e-02 8.60e-01 8.70e-01 ph/cm2/s
Error 4.26e-02 1.27e-02 7.78e-03 8.78e-03 4.75e-02 4.99e-02 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- 1.15e+00 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 2.828 0.117 - - 3.53e-03 2.57e-04 52.450 57
CPL 1.986 -0.890 0.6 0.1 1.12e-02 1.17e-03 58.740 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.828 0.117 - - 3.53e-03 2.57e-04 52.450 57
CPL 1.986 -0.890 0.6 0.1 1.12e-02 1.17e-03 58.740 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
261.5713 -15.8883 0.0068 16.3 86.4 6.1261 28.4 TRIG_01192483
------------------------------------------
Foreground time interval of the image:
0.000 3.990 (delta_t = 3.990 [sec])
5.000 59.010 (delta_t = 54.010 [sec])
60.000 64.000 (delta_t = 4.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 3.990000
5.000000 59.010000
60.000000 64.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.82797 ( -0.115141 0.118608 )
Norm@50keV : 3.53392E-03 ( -0.000258003 0.000256653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
# Reduced chi-squared = 0.9201 for 57 degrees of freedom
# Null hypothesis probability = 6.463326e-01
Photon flux (15-150 keV) in 62 sec: 0.860123 ( -0.0434378 0.0438108 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44509e-06 ( -1.12896e-07 1.13433e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 3.990000
5.000000 59.010000
60.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98554 ( -0.20513 -1.98554 )
Epeak [keV] : 0.647408 ( -0.103781 0.122021 )
Norm@50keV : 1.11699E-02 ( -0.000682394 0.00165241 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 56 degrees of freedom
# Null hypothesis probability = 3.755608e-01
Photon flux (15-150 keV) in 62 sec: 0.859599 ( -0.051601 0.043365 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44478e-06 ( -1.69979e-07 5.63208e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 3.990000
5.000000 59.010000
60.000000 64.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26727 ( )
beta : -9.37167 ( )
Epeak [keV] : 52.2538 ( )
Norm@50keV : 9.43890E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 251.33 using 59 PHA bins.
# Reduced chi-squared = 4.5696 for 55 degrees of freedom
# Null hypothesis probability = 6.865123e-27
Photon flux (15-150 keV) in 62 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] : 7.03866 ( )
R^2/D10^2 : 1.36337 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 131.71 using 59 PHA bins.
# Reduced chi-squared = 2.3106 for 57 degrees of freedom
# Null hypothesis probability = 7.586467e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.766e-07 5.431e-08
25- 50 9.365e-07 5.270e-08
50-150 1.583e-07 2.737e-08
15-150 1.771e-06 8.835e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.3885 (-2.61407 3.02644)
Norm : 7.47910 (-0.946674 1.11157)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.577e-07 5.890e-08
25- 50 8.878e-07 4.309e-08
50-150 3.861e-07 6.175e-08
15-150 2.132e-06 1.057e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.35806 (-0.800566 0.640484)
R1^2/D10^2 : 4.08675 (-1.52784 3.08485)
kT2 [keV] : 19.6513 (-6.04185 9.62045)
R2^2/D10^2 : 9.24933E-03 (-0.00675501 0.0188829)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.492e-07 1.001e-07
25- 50 8.338e-07 9.145e-08
50-150 6.392e-07 3.233e-07
15-150 2.322e-06 4.321e-07
Peak spectrum fit
Power-law model
Time interval is from 60.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.82797 ( -0.115141 0.118608 )
Norm@50keV : 3.53392E-03 ( -0.000258003 0.000256653 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
# Reduced chi-squared = 0.9201 for 57 degrees of freedom
# Null hypothesis probability = 6.463326e-01
Photon flux (15-150 keV) in 62 sec: 0.860123 ( -0.0434378 0.0438108 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44509e-06 ( -1.12896e-07 1.13433e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 60.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98554 ( -0.20513 -1.98554 )
Epeak [keV] : 0.647408 ( -0.103781 0.122021 )
Norm@50keV : 1.11699E-02 ( -0.000682394 0.00165241 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 56 degrees of freedom
# Null hypothesis probability = 3.755608e-01
Photon flux (15-150 keV) in 62 sec: 0.859599 ( -0.051601 0.043365 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44478e-06 ( -1.69979e-07 5.63208e-08 ) ergs/cm2
Band function
Time interval is from 60.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26727 ( )
beta : -9.37167 ( )
Epeak [keV] : 52.2538 ( )
Norm@50keV : 9.43890E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 251.33 using 59 PHA bins.
# Reduced chi-squared = 4.5696 for 55 degrees of freedom
# Null hypothesis probability = 6.865123e-27
Photon flux (15-150 keV) in 62 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] : 7.03866 ( )
R^2/D10^2 : 1.36337 ( )
(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 6.766e-07 5.555e-08
25- 50 9.365e-07 5.084e-08
50-150 1.583e-07 2.641e-08
15-150 1.771e-06 8.804e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.3885 (-2.61407 3.02644)
Norm : 7.47910 (-0.946674 1.11157)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.577e-07 6.107e-08
25- 50 8.878e-07 4.402e-08
50-150 3.861e-07 6.098e-08
15-150 2.132e-06 9.858e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.35806 (-0.800566 0.640484)
R1^2/D10^2 : 4.08675 (-1.52784 3.07879)
kT2 [keV] : 19.6513 (-6.04185 9.62045)
R2^2/D10^2 : 9.24933E-03 (-0.00675501 0.0188829)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.492e-07 1.057e-07
25- 50 8.338e-07 1.073e-07
50-150 6.392e-07 2.822e-07
15-150 2.322e-06 4.263e-07
Plot creation:
Tue Sep 19 01:29:59 EDT 2023