batgrbproduct analysis for trigger=990358
batgrbproduct Analysis for Trigger=990358
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 Aug 18 17:49:10 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger990358/GCN5_download_cron
======================================================================
Trigger: 00990358 Segment: 000
BAT Trigger Time: 619322026.56 [s; MET]
Trigger Stop: 619322026.816 [s; MET]
UTC: 2020-08-17T01:53:21.088100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 154.130522141224 Dec: -33.9213707601735 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.58
Image Trigger?: NO
Rate S/N Ratio: 19.672315572906 [ if not an image trigger ]
Image S/N Ratio: 6.58
Flight Position: [ source = BAT ]
RA: 154.130522141224 Dec: -33.9213707601735 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 154.144691315687 Dec: -33.9036092431956 [deg; J2000]
{ 10h 16m 34.7s , -33d 54' 13.0" }
+/- 3.88850847243098 [arcmin] (estimated 90% radius based on SNR)
+/- 2.67077019450003 [arcmin] (formal 1-sigma fit error)
SNR: 4.37090297687599
Angular difference between Flight and Ground position is 1.278074 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 0.25600004196167 +/-
Measured from: 0
to: 0.25600004196167 [s; relative to TRIGTIME]
T50: 0.25600004196167 +/-
Measured from: 0
to: 0.25600004196167 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.25600004196167 second)
Measured from: 0
to: 0.25600004196167 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.25600004196167 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.000407 0.012060 0.009293 0.000513
0.002801 0.003026 0.002784 0.002430 [error]
Peak -0.000407 0.012060 0.009293 0.000513
0.002801 0.003026 0.002784 0.002430 [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 8.44e-10 2.59e-09 6.53e-09 4.66e-08 1.77e-08 5.66e-08 erg/cm2
Error 7.34e-10 1.39e-09 2.36e-09 4.43e-08 6.52e-09 4.45e-08 erg/cm2
Peak flux Power-law 1.04e-01 1.73e-01 2.18e-01 5.46e-01 6.48e-01 1.04e+00 ph/cm2/s
Error 9.22e-02 9.57e-02 7.79e-02 4.62e-01 2.51e-01 4.55e-01 ph/cm2/s
Fluence Cutoff-PL 7.01e-10 2.65e-09 7.02e-09 2.34e-08 1.74e-08 3.38e-08 erg/cm2
Error 8.34e-10 2.12e-09 2.91e-09 2.85e-08 6.74e-09 3.90e-08 erg/cm2
Peak flux Cutoff-PL 8.59e-02 1.75e-01 2.35e-01 3.23e-01 6.35e-01 8.20e-01 ph/cm2/s
Error 1.04e-01 1.41e-01 9.74e-02 5.78e-01 2.24e-01 3.84e-01 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 0.668 0.711 - - 5.59e-03 2.37e-03 56.650 57
CPL 3.190 3.105 194.7 0.0 3.56e-11 0.00e+00 56.130 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.668 0.711 - - 5.59e-03 2.37e-03 56.650 57
CPL 3.190 3.105 194.7 0.0 3.56e-11 0.00e+00 56.130 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 0.256 0.000 0.256
T90 0.256 0.000 0.256
T50 0.256 0.000 0.256
Peak 0.256 0.000 0.256
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
154.1447 -33.9036 0.0439 19.7 -23.1 0.0231 4.4 TRIG_00990358
------------------------------------------
Foreground time interval of the image:
0.000 0.256 (delta_t = 0.256 [sec])
Background time interval of the image:
-60.560 -2.560 (delta_t = 58.000 [sec])
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 0.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.668309 ( -0.802692 0.619443 )
Norm@50keV : 5.59156E-03 ( -0.0024648 0.00226807 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.65 using 59 PHA bins.
# Reduced chi-squared = 0.9939 for 57 degrees of freedom
# Null hypothesis probability = 4.881185e-01
Photon flux (15-150 keV) in 0.256 sec: 0.648082 ( -0.247314 0.254025 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77266e-08 ( -6.49001e-09 6.54454e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18982 ( -7.032 -0.822496 )
Epeak [keV] : 194.703 ( )
Norm@50keV : 3.56203E-11 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.13 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 56 degrees of freedom
# Null hypothesis probability = 4.700691e-01
Photon flux (15-150 keV) in 0.256 sec: 0.635141 ( -0.248241 0.199434 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73978e-08 ( -6.7838e-09 6.69535e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.06808E-02 ( 0.257222 3.87173 )
beta : 9.99759 ( -9.99759 -9.99759 )
Epeak [keV] : 192.393 ( )
Norm@50keV : 2.80427E-21 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.13 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Null hypothesis probability = 4.323829e-01
Photon flux (15-150 keV) in 0.256 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] : 29.5550 (-11.988 36.3704)
R^2/D10^2 : 1.04263E-02 (-0.0104263 0.0398504)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.03 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.740649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.681e-10 2.399e-10
25- 50 2.257e-09 1.395e-09
50-150 1.400e-08 8.559e-09
15-150 1.663e-08 1.047e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.356 (-74.2487 -199.361)
Norm : 2.61222 (-1.07417 1.07416)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.068773e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.665e-09 1.123e-09
25- 50 3.203e-09 2.052e-09
50-150 7.025e-09 4.586e-09
15-150 1.189e-08 7.479e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 45.5626 (-44.9664 -44.9664)
R1^2/D10^2 : 2.70397E-03 (-0.00275412 0.0310976)
kT2 [keV] : 10.0426 (-9.76302 58.2169)
R2^2/D10^2 : 0.131823 (-0.133867 -0.133867)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.87 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.418906e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.626e-10 6.460e-10
25- 50 2.927e-09 2.052e-09
50-150 1.414e-08 7.571e-09
15-150 1.793e-08 9.316e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.668309 ( -0.802692 0.619443 )
Norm@50keV : 5.59156E-03 ( -0.0024648 0.00226807 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.65 using 59 PHA bins.
# Reduced chi-squared = 0.9939 for 57 degrees of freedom
# Null hypothesis probability = 4.881185e-01
Photon flux (15-150 keV) in 0.256 sec: 0.648082 ( -0.247314 0.254025 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77266e-08 ( -6.49001e-09 6.54454e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18982 ( -7.03197 -0.822496 )
Epeak [keV] : 194.703 ( )
Norm@50keV : 3.56203E-11 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.13 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 56 degrees of freedom
# Null hypothesis probability = 4.700691e-01
Photon flux (15-150 keV) in 0.256 sec: 0.635141 ( -0.248241 0.199434 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73978e-08 ( -6.7838e-09 6.69535e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.06808E-02 ( 0.257222 3.87173 )
beta : 9.99759 ( -9.99759 -9.99759 )
Epeak [keV] : 192.393 ( )
Norm@50keV : 2.80427E-21 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.13 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 55 degrees of freedom
# Null hypothesis probability = 4.323829e-01
Photon flux (15-150 keV) in 0.256 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] : 29.5550 (-11.988 36.3704)
R^2/D10^2 : 1.04263E-02 (-0.0104263 0.0398504)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.03 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.740649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.681e-10 2.383e-10
25- 50 2.257e-09 1.384e-09
50-150 1.400e-08 8.658e-09
15-150 1.663e-08 1.057e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.356 (-74.2487 -199.361)
Norm : 2.61222 (-1.07417 1.07416)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.068773e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.665e-09 1.074e-09
25- 50 3.203e-09 2.089e-09
50-150 7.025e-09 4.553e-09
15-150 1.189e-08 7.908e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 45.5626 (-44.9664 -44.9664)
R1^2/D10^2 : 2.70397E-03 (-0.00275412 0.0310976)
kT2 [keV] : 10.0426 (-9.76302 58.2169)
R2^2/D10^2 : 0.131823 (-0.133867 -0.133867)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.87 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.418906e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.626e-10 6.276e-10
25- 50 2.927e-09 1.697e-09
50-150 1.414e-08 7.328e-09
15-150 1.793e-08 9.366e-09
Plot creation:
Tue Aug 18 18:06:41 EDT 2020