batgrbproduct analysis for trigger=1064380
batgrbproduct Analysis for Trigger=1064380
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 Aug 8 21:22:29 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1064380/GCN5_download_cron
======================================================================
Trigger: 01064380 Segment: 000
BAT Trigger Time: 650055128 [s; MET]
Trigger Stop: 650055192 [s; MET]
UTC: 2021-08-07T18:51:40.491940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.114521135169 Dec: -15.9365175815752 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 21.09
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 21.09
Flight Position: [ source = BAT ]
RA: 245.114521135169 Dec: -15.9365175815752 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.118298447598 Dec: -15.9159334991069 [deg; J2000]
{ 16h 20m 28.4s , -15d 54' 57.4" }
+/- 1.01234121647162 [arcmin] (estimated 90% radius based on SNR)
+/- 0.241340611191705 [arcmin] (formal 1-sigma fit error)
SNR: 29.8888011430705
Angular difference between Flight and Ground position is 1.254127 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 64 +/- 0.143108374017273
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/- 0.143108374017273
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 2.775551 0.267397 0.029060 0.054560
0.053491 0.047359 0.040016 0.035328 [error]
Peak 2.775551 0.267397 0.029060 0.054560
0.053491 0.047359 0.040016 0.035328 [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 7.81e-07 9.97e-08 5.56e-09 3.26e-10 8.86e-07 8.86e-07 erg/cm2
Error 8.11e-08 2.04e-08 2.92e-09 3.02e-10 7.99e-08 7.99e-08 erg/cm2
Peak flux Power-law 4.32e-01 3.23e-02 9.00e-04 2.58e-05 4.65e-01 4.65e-01 ph/cm2/s
Error 4.67e-02 6.28e-03 4.61e-04 2.32e-05 4.58e-02 4.58e-02 ph/cm2/s
Fluence Cutoff-PL 7.81e-07 9.75e-08 4.43e-09 1.42e-10 8.83e-07 8.83e-07 erg/cm2
Error 8.15e-08 2.80e-08 4.55e-09 3.69e-10 8.39e-08 6.37e-08 erg/cm2
Peak flux Cutoff-PL 4.31e-01 3.18e-02 7.53e-04 1.38e-05 4.64e-01 4.64e-01 ph/cm2/s
Error 4.69e-02 7.61e-03 5.80e-04 2.74e-05 4.67e-02 4.67e-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 6.165 0.454 - - 9.57e-05 4.08e-05 78.160 57
CPL 1.796 0.000 1.0 0.0 3.83e-01 0.00e+00 80.820 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 6.165 0.454 - - 9.57e-05 4.08e-05 78.160 57
CPL 1.796 0.000 1.0 0.0 3.83e-01 0.00e+00 80.820 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
245.1183 -15.9159 0.0065 0.0 174.4 3.0254 29.9 TRIG_01064380
------------------------------------------
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: 6.16481 ( -0.451739 0.456256 )
Norm@50keV : 9.56740E-05 ( -3.36074e-05 4.7947e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.16 using 59 PHA bins.
# Reduced chi-squared = 1.371 for 57 degrees of freedom
# Null hypothesis probability = 3.288712e-02
Photon flux (15-150 keV) in 64 sec: 0.464812 ( -0.0456563 0.045879 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.86426e-07 ( -7.9696e-08 8.0167e-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: 1.79597 ( )
Epeak [keV] : 0.967490 ( )
Norm@50keV : 0.382651 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.82 using 59 PHA bins.
# Reduced chi-squared = 1.443 for 56 degrees of freedom
# Null hypothesis probability = 1.664854e-02
Photon flux (15-150 keV) in 64 sec: 0.463524 ( -0.047105 0.04631 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.82854e-07 ( -8.62208e-08 8.15232e-08 ) 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 : -1.62180 ( )
beta : -6.06812 ( )
Epeak [keV] : 10.7579 ( )
Norm@50keV : 4.81761E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 243.83 using 59 PHA bins.
# Reduced chi-squared = 4.4332 for 55 degrees of freedom
# Null hypothesis probability = 1.318314e-25
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] : 2.48229 (-0.198518 0.231527)
R^2/D10^2 : 233.081 (-120.199 239.413)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.77 using 59 PHA bins.
# Reduced chi-squared = 1.505 for 57 degrees of freedom
# Null hypothesis probability = 8.181651e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.770e-07 1.661e-07
25- 50 5.549e-08 1.494e-08
50-150 1.635e-11 1.192e-11
15-150 8.324e-07 2.037e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.33340 (-0.497486 0.611788)
Norm : 181.037 (-80.604 145.904)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.805e-07 1.341e-07
25- 50 7.005e-08 1.736e-08
50-150 1.674e-10 1.137e-10
15-150 8.508e-07 1.484e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.85235 ( )
R1^2/D10^2 : 9.28760 ( )
kT2 [keV] : 3.50107 ( )
R2^2/D10^2 : 7.55185E-02 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.514e-07 1.368e-01
25- 50 1.460e-07 1.361e+00
50-150 1.406e-09 3.162e+01
15-150 5.989e-07 3.472e+01
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: 6.16481 ( -0.451739 0.456256 )
Norm@50keV : 9.56740E-05 ( -3.36074e-05 4.7947e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.16 using 59 PHA bins.
# Reduced chi-squared = 1.371 for 57 degrees of freedom
# Null hypothesis probability = 3.288712e-02
Photon flux (15-150 keV) in 64 sec: 0.464812 ( -0.0456563 0.045879 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.86426e-07 ( -7.9696e-08 8.0167e-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: 1.79597 ( )
Epeak [keV] : 0.967490 ( )
Norm@50keV : 0.382651 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.82 using 59 PHA bins.
# Reduced chi-squared = 1.443 for 56 degrees of freedom
# Null hypothesis probability = 1.664854e-02
Photon flux (15-150 keV) in 64 sec: 0.463524 ( -0.047105 0.04631 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.82854e-07 ( -8.62208e-08 8.15232e-08 ) 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 : -1.62180 ( )
beta : -6.06812 ( )
Epeak [keV] : 10.7579 ( )
Norm@50keV : 4.81761E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 243.83 using 59 PHA bins.
# Reduced chi-squared = 4.4332 for 55 degrees of freedom
# Null hypothesis probability = 1.318314e-25
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] : 2.48229 (-0.198518 0.231527)
R^2/D10^2 : 233.081 (-120.199 239.413)
(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 7.770e-07 1.748e-07
25- 50 5.549e-08 1.427e-08
50-150 1.635e-11 1.147e-11
15-150 8.324e-07 1.773e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.33340 (-0.497486 0.611788)
Norm : 181.037 (-80.604 145.904)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.805e-07 1.497e-07
25- 50 7.005e-08 1.767e-08
50-150 1.674e-10 1.288e-10
15-150 8.508e-07 1.421e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.85235 ( )
R1^2/D10^2 : 9.28760 ( )
kT2 [keV] : 3.50107 ( )
R2^2/D10^2 : 7.55185E-02 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.514e-07 1.547e-01
25- 50 1.460e-07 1.280e+00
50-150 1.406e-09 2.979e+01
15-150 5.989e-07 3.731e+01
Plot creation:
Sun Aug 8 21:25:28 EDT 2021