batgrbproduct analysis for trigger=1132968
batgrbproduct Analysis for Trigger=1132968
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): Sun Oct 30 12:54:13 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1132968/GCN5_download_cron
======================================================================
Trigger: 01132968 Segment: 000
BAT Trigger Time: 688737976 [s; MET]
Trigger Stop: 688738736 [s; MET]
UTC: 2022-10-29T12:05:45.878400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.6554636575039 Dec: 22.0253938402808 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.78
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.78
Flight Position: [ source = BAT ]
RA: 83.6554636575039 Dec: 22.0253938402808 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.6265369137697 Dec: 21.9922258325416 [deg; J2000]
{ 05h 34m 30.4s , +21d 59' 32.0" }
+/- 2.21877398953361 [arcmin] (estimated 90% radius based on SNR)
+/- 0.819712409100672 [arcmin] (formal 1-sigma fit error)
SNR: 9.74251633822962
Angular difference between Flight and Ground position is 2.559239 arcmin
Partial Coding Fraction: 0.2695312 [ including projection effects ]
Duration
T90: 760 +/-
Measured from: 0
to: 760 [s; relative to TRIGTIME]
T50: 760 +/-
Measured from: 0
to: 760 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 760 second)
Measured from: 0
to: 760 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 760 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.476965 3.229046 1.628211 0.408465
0.222109 0.227621 0.196592 0.166572 [error]
Peak 3.476965 3.229046 1.628211 0.408465
0.222109 0.227621 0.196592 0.166572 [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 1.29e-06 1.57e-06 1.38e-06 2.10e-06 4.97e-06 6.33e-06 erg/cm2
Error 1.52e-07 1.24e-07 2.00e-07 6.06e-07 4.49e-07 8.19e-07 erg/cm2
Peak flux Power-law 1.49e-01 1.00e-01 4.43e-02 2.70e-02 3.07e-01 3.21e-01 ph/cm2/s
Error 1.80e-02 7.88e-03 6.16e-03 7.26e-03 2.47e-02 2.52e-02 ph/cm2/s
Fluence Cutoff-PL 1.29e-06 1.57e-06 1.38e-06 2.07e-06 4.96e-06 6.30e-06 erg/cm2
Error -------- -------- 2.00e-07 -------- -------- 1.08e-06 erg/cm2
Peak flux Cutoff-PL 1.50e-01 1.00e-01 4.40e-02 2.63e-02 3.07e-01 3.21e-01 ph/cm2/s
Error 1.83e-02 -------- 6.19e-03 -------- 1.85e-02 1.98e-02 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.60e-01 1.12e-01 5.18e-02 3.33e-02 3.40e-01 3.57e-01 ph/cm2/s
Error 2.21e-02 1.01e-02 8.09e-03 6.99e-03 3.13e-02 3.22e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.181 0.163 - - 1.87e-03 1.93e-04 56.400 57
CPL 2.428 -0.811 169.1 0.0 1.39e-03 0.00e+00 55.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.181 0.163 - - 1.87e-03 1.93e-04 56.400 57
CPL 2.428 -0.811 169.1 0.0 1.39e-03 0.00e+00 55.620 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 760.000 0.000 760.000
T90 760.000 0.000 760.000
T50 760.000 0.000 760.000
Peak 760.000 0.000 760.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.6265 +21.9922 0.0198 44.6 32.4 9.5102 9.7 TRIG_01132968
------------------------------------------
Foreground time interval of the image:
0.000 91.983 (delta_t = 91.983 [sec])
93.000 111.100 (delta_t = 18.100 [sec])
120.000 152.470 (delta_t = 32.470 [sec])
154.000 183.045 (delta_t = 29.045 [sec])
532.000 606.610 (delta_t = 74.610 [sec])
694.000 721.570 (delta_t = 27.570 [sec])
723.000 732.099 (delta_t = 9.099 [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 91.983100
93.000000 111.100000
120.000000 152.469600
154.000000 183.045300
532.000000 606.610000
694.000000 721.570000
723.000000 732.099300
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.18113 ( -0.158943 0.166988 )
Norm@50keV : 1.87163E-03 ( -0.000194892 0.00019025 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 57 degrees of freedom
# Null hypothesis probability = 4.976348e-01
Photon flux (15-150 keV) in 282.9 sec: 0.306814 ( -0.0246646 0.0247195 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.96546e-06 ( -4.46159e-07 4.51387e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 91.983100
93.000000 111.100000
120.000000 152.469600
154.000000 183.045300
532.000000 606.610000
694.000000 721.570000
723.000000 732.099300
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42785 ( -0.373548 -1.99579 )
Epeak [keV] : 169.126 ( )
Norm@50keV : 1.39097E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.62 using 59 PHA bins.
# Reduced chi-squared = 0.9932 for 56 degrees of freedom
# Null hypothesis probability = 4.891843e-01
Photon flux (15-150 keV) in 282.9 sec: 0.306944 0.306684 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.9619e-06 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 91.983100
93.000000 111.100000
120.000000 152.469600
154.000000 183.045300
532.000000 606.610000
694.000000 721.570000
723.000000 732.099300
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.72221 ( 1.72132 1.72132 )
beta : -2.18121 ( 2.18128 0.159125 )
Epeak [keV] : 8.31570 ( -8.97284 9990.91 )
Norm@50keV : 5.35826E-03 ( -0.00307069 30.4302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 55 degrees of freedom
# Null hypothesis probability = 4.224584e-01
Photon flux (15-150 keV) in 282.9 sec: 0.339713 ( 6.66029 -0.031298 ) 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] : 9.05278 (-0.850131 0.940781)
R^2/D10^2 : 0.196104 (-0.0638744 0.0952068)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 100.27 using 59 PHA bins.
# Reduced chi-squared = 1.7590 for 57 degrees of freedom
# Null hypothesis probability = 3.533912e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.879e-07 1.183e-07
25- 50 1.904e-06 2.065e-07
50-150 7.396e-07 1.820e-07
15-150 3.532e-06 3.239e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 54.6525 (-12.0466 16.33)
Norm : 1.63690 (-0.236842 0.279993)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.144e-06 1.100e-07
25- 50 1.691e-06 2.529e-07
50-150 1.775e-06 6.938e-07
15-150 4.610e-06 1.044e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.62288 (-1.24303 1.09662)
R1^2/D10^2 : 0.577653 (-0.249997 0.503177)
kT2 [keV] : 30.1038 (-9.98515 21.631)
R2^2/D10^2 : 1.29795E-03 (-0.00103351 0.00446648)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.135e-06 2.337e-07
25- 50 1.650e-06 3.241e-07
50-150 2.231e-06 1.095e-06
15-150 5.016e-06 1.436e-06
Peak spectrum fit
Power-law model
Time interval is from 723.000 sec. to 732.099 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.18113 ( -0.158943 0.166988 )
Norm@50keV : 1.87163E-03 ( -0.000194892 0.00019025 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 57 degrees of freedom
# Null hypothesis probability = 4.976348e-01
Photon flux (15-150 keV) in 282.9 sec: 0.306814 ( -0.0246646 0.0247195 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.96546e-06 ( -4.46159e-07 4.51387e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 723.000 sec. to 732.099 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42785 ( -0.373548 -1.99579 )
Epeak [keV] : 169.126 ( )
Norm@50keV : 1.39097E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.62 using 59 PHA bins.
# Reduced chi-squared = 0.9932 for 56 degrees of freedom
# Null hypothesis probability = 4.891843e-01
Photon flux (15-150 keV) in 282.9 sec: 0.306944 0.306684 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.9619e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 723.000 sec. to 732.099 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.72221 ( 1.72132 1.72132 )
beta : -2.18121 ( 2.18128 0.159125 )
Epeak [keV] : 8.31570 ( -8.97284 9990.91 )
Norm@50keV : 5.35826E-03 ( -0.00308911 0.0471316 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 55 degrees of freedom
# Null hypothesis probability = 4.224584e-01
Photon flux (15-150 keV) in 282.9 sec: 0.339713 ( 6.66029 -0.031298 ) 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] : 9.05278 (-0.850131 0.940781)
R^2/D10^2 : 0.196104 (-0.0638744 0.0952068)
(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 8.879e-07 1.204e-07
25- 50 1.904e-06 1.876e-07
50-150 7.396e-07 1.772e-07
15-150 3.532e-06 3.451e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 54.6525 (-12.0466 16.33)
Norm : 1.63690 (-0.236842 0.279993)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.144e-06 1.095e-07
25- 50 1.691e-06 2.723e-07
50-150 1.775e-06 6.536e-07
15-150 4.610e-06 1.064e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.62288 (-1.24303 1.09662)
R1^2/D10^2 : 0.577653 (-0.249997 0.503175)
kT2 [keV] : 30.1038 (-9.98515 21.631)
R2^2/D10^2 : 1.29795E-03 (-0.00103351 0.00446648)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.135e-06 2.826e-07
25- 50 1.650e-06 3.157e-07
50-150 2.231e-06 1.133e-06
15-150 5.016e-06 1.462e-06
Plot creation:
Sun Oct 30 12:56:24 EDT 2022