batgrbproduct analysis for trigger=809374
batgrbproduct Analysis for Trigger=809374
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 v2.46
Process Start Time (local time): Sun Feb 11 10:57:24 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger809374/GCN5_download_cron
======================================================================
Trigger: 00809374 Segment: 000
BAT Trigger Time: 539914176 [s; MET]
Trigger Stop: 539914528 [s; MET]
UTC: 2018-02-10T00:09:15.546880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.747375379412 Dec: 35.0383948710055 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.69
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.69
Flight Position: [ source = BAT ]
RA: 299.747375379412 Dec: 35.0383948710055 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.593931232359 Dec: 35.1960964487564 [deg; J2000]
{ 19h 58m 22.5s , +35d 11' 45.9" }
+/- 0.725988554091731 [arcmin] (estimated 90% radius based on SNR)
+/- 0.318683216386205 [arcmin] (formal 1-sigma fit error)
SNR: 48.0607044145125
Angular difference between Flight and Ground position is 12.093157 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 352 +/-
Measured from: 0
to: 352 [s; relative to TRIGTIME]
T50: 352 +/-
Measured from: 0
to: 352 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 352 second)
Measured from: 0
to: 352 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 352 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.257941 2.256429 1.224745 0.174774
0.110738 0.111734 0.094526 0.078554 [error]
Peak 2.257941 2.256429 1.224745 0.174774
0.110738 0.111734 0.094526 0.078554 [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 6.60e-07 9.06e-07 9.19e-07 1.69e-06 3.03e-06 4.18e-06 erg/cm2
Error 6.04e-08 5.25e-08 9.17e-08 3.47e-07 2.06e-07 4.34e-07 erg/cm2
Peak flux Power-law 6.11e-02 4.63e-02 2.35e-02 1.71e-02 1.39e-01 1.48e-01 ph/cm2/s
Error 5.71e-03 2.69e-03 2.26e-03 3.25e-03 8.24e-03 8.58e-03 ph/cm2/s
Fluence Cutoff-PL 6.52e-07 9.17e-07 9.17e-07 1.38e-06 2.99e-06 3.87e-06 erg/cm2
Error 5.14e-08 6.39e-08 9.43e-08 5.03e-07 1.86e-07 8.54e-07 erg/cm2
Peak flux Cutoff-PL 6.02e-02 4.68e-02 2.35e-02 1.45e-02 1.38e-01 1.45e-01 ph/cm2/s
Error 6.47e-03 3.21e-03 2.30e-03 5.62e-03 8.83e-03 1.14e-02 ph/cm2/s
Fluence Band 6.26e-07 9.36e-07 9.32e-07 1.67e-06 3.04e-06 4.17e-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 1.980 0.118 - - 9.34e-04 6.61e-05 63.590 57
CPL 1.872 0.395 51.7 -1.1 1.07e-03 6.03e-04 63.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.980 0.118 - - 9.34e-04 6.61e-05 63.590 57
CPL 1.872 0.395 51.7 -1.1 1.07e-03 6.03e-04 63.400 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 352.000 0.000 352.000
T90 352.000 0.000 352.000
T50 352.000 0.000 352.000
Peak 352.000 0.000 352.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.5939 +35.1961 0.0040 9.1 -18.5 13.1862 48.1 TRIG_00809374
------------------------------------------
Foreground time interval of the image:
0.000 352.000 (delta_t = 352.000 [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 352.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98047 ( -0.116258 0.119264 )
Norm@50keV : 9.33876E-04 ( -6.65366e-05 6.56075e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.59 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.556404e-01
Photon flux (15-150 keV) in 352 sec: 0.138838 ( -0.00822942 0.0082449 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02859e-06 ( -2.04408e-07 2.06723e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 352.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87192 ( -0.461113 0.327955 )
Epeak [keV] : 51.6782 ( -49.5403 -51.6782 )
Norm@50keV : 1.07277E-03 ( -0.000366145 0.000838864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.40 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 56 degrees of freedom
# Null hypothesis probability = 2.316809e-01
Photon flux (15-150 keV) in 352 sec: 0.137946 ( -0.008877 0.008791 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99314e-06 ( -2.47586e-07 1.23805e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 352.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.418047 ( 1.03022 1.03022 )
beta : -2.04398 ( 2.03431 0.146609 )
Epeak [keV] : 24.5457 ( -26.6731 60.6995 )
Norm@50keV : 6.04437E-02 ( -0.05982 150.072 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.43 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.291205e-01
Photon flux (15-150 keV) in 352 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0447e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3796 ( )
R^2/D10^2 : 5.31127E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 140.07 using 59 PHA bins.
# Reduced chi-squared = 2.4574 for 57 degrees of freedom
# Null hypothesis probability = 6.048058e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.150e-07 4.435e-08
25- 50 1.087e-06 7.568e-08
50-150 6.311e-07 1.093e-07
15-150 2.133e-06 1.624e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 72.9323 (-13.4869 18.6651)
Norm : 0.659926 (-0.064688 0.0745136)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.32 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 57 degrees of freedom
# Null hypothesis probability = 1.647432e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.984e-07 5.280e-08
25- 50 9.625e-07 5.579e-08
50-150 1.274e-06 1.837e-07
15-150 2.835e-06 2.288e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.40860 (-0.807796 0.913528)
R1^2/D10^2 : 0.483639 (-0.217401 0.450777)
kT2 [keV] : 20.0683 (-3.22152 4.78553)
R2^2/D10^2 : 3.30191E-03 (-0.00183894 0.00329132)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.29 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.329846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.513e-07 1.334e-07
25- 50 8.926e-07 1.427e-07
50-150 1.370e-06 3.582e-07
15-150 2.914e-06 6.274e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 352.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98047 ( -0.116258 0.119264 )
Norm@50keV : 9.33876E-04 ( -6.65366e-05 6.56075e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.59 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.556404e-01
Photon flux (15-150 keV) in 352 sec: 0.138838 ( -0.00822942 0.0082449 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02859e-06 ( -2.04408e-07 2.06723e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 352.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87192 ( -0.461113 0.327955 )
Epeak [keV] : 51.6782 ( -49.54 -51.6782 )
Norm@50keV : 1.07277E-03 ( -0.000366145 0.000838864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.40 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 56 degrees of freedom
# Null hypothesis probability = 2.316809e-01
Photon flux (15-150 keV) in 352 sec: 0.137946 ( -0.008877 0.008791 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99314e-06 ( -2.47586e-07 1.23805e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 352.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.418047 ( 1.03022 1.03022 )
beta : -2.04398 ( 2.03431 0.146609 )
Epeak [keV] : 24.5457 ( -26.6731 60.6995 )
Norm@50keV : 6.04437E-02 ( -0.05982 150.08 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.43 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.291205e-01
Photon flux (15-150 keV) in 352 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0447e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3796 ( )
R^2/D10^2 : 5.31127E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 140.07 using 59 PHA bins.
# Reduced chi-squared = 2.4574 for 57 degrees of freedom
# Null hypothesis probability = 6.048058e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.150e-07 4.523e-08
25- 50 1.087e-06 7.146e-08
50-150 6.311e-07 1.045e-07
15-150 2.133e-06 1.478e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 72.9323 (-13.4869 18.6651)
Norm : 0.659926 (-0.064688 0.0745136)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.32 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 57 degrees of freedom
# Null hypothesis probability = 1.647432e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.984e-07 5.174e-08
25- 50 9.625e-07 6.266e-08
50-150 1.274e-06 1.950e-07
15-150 2.835e-06 2.258e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.40860 (-0.807796 0.913528)
R1^2/D10^2 : 0.483639 (-0.217401 0.450777)
kT2 [keV] : 20.0683 (-3.22152 4.78553)
R2^2/D10^2 : 3.30191E-03 (-0.00183894 0.00329132)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.29 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.329846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.513e-07 1.331e-07
25- 50 8.926e-07 1.514e-07
50-150 1.370e-06 4.161e-07
15-150 2.914e-06 5.537e-07
Plot creation:
Sun Feb 11 11:03:41 EST 2018