batgrbproduct analysis for trigger=1192735
batgrbproduct Analysis for Trigger=1192735
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): Wed Sep 27 12:46:18 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192735/GCN5_download_cron
======================================================================
Trigger: 01192735 Segment: 000
BAT Trigger Time: 717457904 [s; MET]
Trigger Stop: 717457968 [s; MET]
UTC: 2023-09-26T21:51:11.919280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.7319973470793 Dec: 22.2584442506932 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.88
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.88
Flight Position: [ source = BAT ]
RA: 83.7319973470793 Dec: 22.2584442506932 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.7373332441937 Dec: 22.2602264053414 [deg; J2000]
{ 05h 34m 57.0s , +22d 15' 36.8" }
+/- 1.44967691151087 [arcmin] (estimated 90% radius based on SNR)
+/- 0.637238587598391 [arcmin] (formal 1-sigma fit error)
SNR: 17.8949677410325
Angular difference between Flight and Ground position is 0.315000 arcmin
Partial Coding Fraction: 0.9296875 [ 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 0.993221 0.915795 0.465128 0.069597
0.054780 0.055645 0.047055 0.039840 [error]
Peak 0.993221 0.915795 0.465128 0.069597
0.054780 0.055645 0.047055 0.039840 [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 2.82e-07 3.71e-07 3.57e-07 6.11e-07 1.21e-06 1.62e-06 erg/cm2
Error 2.97e-08 2.59e-08 4.50e-08 1.55e-07 1.01e-07 2.02e-07 erg/cm2
Peak flux Power-law 1.44e-01 1.05e-01 5.03e-02 3.42e-02 3.15e-01 3.33e-01 ph/cm2/s
Error 1.55e-02 7.26e-03 6.12e-03 8.09e-03 2.22e-02 2.32e-02 ph/cm2/s
Fluence Cutoff-PL 2.74e-07 3.82e-07 3.53e-07 3.67e-07 1.18e-06 1.38e-06 erg/cm2
Error 3.39e-08 3.37e-08 4.81e-08 2.42e-07 1.21e-07 3.36e-07 erg/cm2
Peak flux Cutoff-PL 1.39e-01 1.08e-01 5.01e-02 2.29e-02 3.10e-01 3.20e-01 ph/cm2/s
Error 1.79e-02 9.27e-03 6.44e-03 1.53e-02 2.39e-02 3.02e-02 ph/cm2/s
Fluence Band 2.71e-07 3.81e-07 3.51e-07 4.30e-07 1.17e-06 1.44e-06 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 2.055 0.143 - - 2.05e-03 1.83e-04 71.470 57
CPL 1.771 0.479 34.5 0.0 2.96e-03 0.00e+00 70.690 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.055 0.143 - - 2.05e-03 1.83e-04 71.470 57
CPL 1.771 0.479 34.5 0.0 2.96e-03 0.00e+00 70.690 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
83.7373 +22.2602 0.0107 13.7 126.0 2.5488 17.9 TRIG_01192735
------------------------------------------
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: 2.05498 ( -0.14016 0.145548 )
Norm@50keV : 2.04636E-03 ( -0.000184921 0.000181645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.47 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 57 degrees of freedom
# Null hypothesis probability = 9.401004e-02
Photon flux (15-150 keV) in 64 sec: 0.314975 ( -0.0221788 0.0221991 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21206e-06 ( -9.98477e-08 1.01398e-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: 1.77110 ( -0.613552 0.34517 )
Epeak [keV] : 34.4595 ( )
Norm@50keV : 2.95845E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.69 using 59 PHA bins.
# Reduced chi-squared = 1.262 for 56 degrees of freedom
# Null hypothesis probability = 8.939429e-02
Photon flux (15-150 keV) in 64 sec: 0.310172 ( -0.023932 0.0239 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17587e-06 ( -1.19098e-07 1.22253e-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 : -1.74909 ( 1.74909 1.74909 )
beta : -2.47226 ( 2.43955 0.501449 )
Epeak [keV] : 35.2673 ( -34.9405 -34.9405 )
Norm@50keV : 3.03613E-03 ( -0.00105022 0.0934259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.67 using 59 PHA bins.
# Reduced chi-squared = 1.285 for 55 degrees of freedom
# Null hypothesis probability = 7.570934e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17263e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.1289 ( )
R^2/D10^2 : 0.133214 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 114.82 using 59 PHA bins.
# Reduced chi-squared = 2.0144 for 57 degrees of freedom
# Null hypothesis probability = 8.959220e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.789e-07 2.253e-08
25- 50 4.529e-07 3.539e-08
50-150 2.453e-07 5.002e-08
15-150 8.771e-07 7.776e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.3313 (-12.9335 18.0513)
Norm : 1.58563 (-0.189399 0.208569)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.571e-07 2.477e-08
25- 50 3.978e-07 2.829e-08
50-150 4.730e-07 9.232e-08
15-150 1.128e-06 1.011e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.14126 (-0.974931 1.31053)
R1^2/D10^2 : 3.06962 (-2.07633 6.83317)
kT2 [keV] : 15.1365 (-2.3302 3.70265)
R2^2/D10^2 : 2.31194E-02 (-0.0138679 0.0159796)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.817e-07 1.242e-07
25- 50 3.679e-07 9.594e-08
50-150 4.458e-07 1.369e-07
15-150 1.095e-06 2.669e-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: 2.05498 ( -0.14016 0.145548 )
Norm@50keV : 2.04636E-03 ( -0.000184921 0.000181645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.47 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 57 degrees of freedom
# Null hypothesis probability = 9.401004e-02
Photon flux (15-150 keV) in 64 sec: 0.314975 ( -0.0221788 0.0221991 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21206e-06 ( -9.98477e-08 1.01398e-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: 1.77110 ( -0.613552 0.34517 )
Epeak [keV] : 34.4595 ( )
Norm@50keV : 2.95845E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.69 using 59 PHA bins.
# Reduced chi-squared = 1.262 for 56 degrees of freedom
# Null hypothesis probability = 8.939429e-02
Photon flux (15-150 keV) in 64 sec: 0.310172 ( -0.023932 0.0239 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17587e-06 ( -1.19098e-07 1.22253e-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 : -1.74909 ( 1.74909 1.74909 )
beta : -2.47226 ( 2.43955 0.501449 )
Epeak [keV] : 35.2673 ( -34.9405 -34.9405 )
Norm@50keV : 3.03613E-03 ( -0.00105022 0.0934177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.67 using 59 PHA bins.
# Reduced chi-squared = 1.285 for 55 degrees of freedom
# Null hypothesis probability = 7.570934e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17263e-06 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.1289 ( )
R^2/D10^2 : 0.133214 ( )
(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 1.789e-07 2.214e-08
25- 50 4.529e-07 3.798e-08
50-150 2.453e-07 4.650e-08
15-150 8.771e-07 7.424e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.3313 (-12.9335 18.0513)
Norm : 1.58563 (-0.189399 0.208569)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.571e-07 2.541e-08
25- 50 3.978e-07 3.040e-08
50-150 4.730e-07 9.309e-08
15-150 1.128e-06 1.056e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.14126 (-0.974931 1.31053)
R1^2/D10^2 : 3.06962 (-2.07633 6.83317)
kT2 [keV] : 15.1365 (-2.3302 3.70265)
R2^2/D10^2 : 2.31194E-02 (-0.0138679 0.0159796)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.817e-07 1.208e-07
25- 50 3.679e-07 9.245e-08
50-150 4.458e-07 1.297e-07
15-150 1.095e-06 2.792e-07
Plot creation:
Wed Sep 27 12:49:13 EDT 2023