batgrbproduct analysis for trigger=908329
batgrbproduct Analysis for Trigger=908329
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): Fri Jun 14 18:37:29 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger908329/GCN5_download_cron
======================================================================
Trigger: 00908329 Segment: 000
BAT Trigger Time: 582115645.12 [s; MET]
Trigger Stop: 582115646.144 [s; MET]
UTC: 2019-06-13T10:47:02.052640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 305.422149308421 Dec: -4.66387279817383 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.16
Image Trigger?: NO
Rate S/N Ratio: 31.8904374382039 [ if not an image trigger ]
Image S/N Ratio: 9.16
Flight Position: [ source = BAT ]
RA: 305.422149308421 Dec: -4.66387279817383 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 305.434317417239 Dec: -4.65463039647091 [deg; J2000]
{ 20h 21m 44.2s , -04d 39' 16.7" }
+/- 1.86804877899821 [arcmin] (estimated 90% radius based on SNR)
+/- 0.957765892824031 [arcmin] (formal 1-sigma fit error)
SNR: 12.4572142422999
Angular difference between Flight and Ground position is 0.914893 arcmin
Partial Coding Fraction: 0.1835938 [ including projection effects ]
Duration
T90: 161.131999969482 +/- 16.5402054901977
Measured from: -2.23199987411499
to: 158.900000095367 [s; relative to TRIGTIME]
T50: 120.611999869347 +/- 23.1173095725892
Measured from: -0.103999853134155
to: 120.508000016212 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0119999647140503
to: 1.01199996471405 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.84800004959106
to: 175.419999957085 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.029046 1.463832 0.876609 0.343587
0.149872 0.155077 0.140610 0.126265 [error]
Peak 0.138401 0.188895 0.251861 0.106730
0.024389 0.027950 0.028592 0.024639 [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 4.42e-07 6.63e-07 7.43e-07 1.58e-06 2.32e-06 3.43e-06 erg/cm2
Error 8.78e-08 8.17e-08 1.45e-07 6.47e-07 3.31e-07 7.76e-07 erg/cm2
Peak flux Power-law 1.55e+00 1.81e+00 1.52e+00 2.15e+00 5.65e+00 7.02e+00 ph/cm2/s
Error 3.73e-01 2.67e-01 2.34e-01 6.96e-01 7.47e-01 9.62e-01 ph/cm2/s
Fluence Cutoff-PL 4.42e-07 6.64e-07 7.43e-07 1.56e-06 2.32e-06 3.41e-06 erg/cm2
Error 8.75e-08 8.13e-08 1.44e-07 6.18e-07 3.27e-07 8.83e-07 erg/cm2
Peak flux Cutoff-PL 1.47e+00 1.85e+00 1.56e+00 1.58e+00 5.59e+00 6.46e+00 ph/cm2/s
Error 4.50e-01 3.09e-01 2.76e-01 1.11e+00 7.72e-01 1.37e+00 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 1.836 0.240 - - 1.42e-03 1.99e-04 82.100 57
CPL 2.659 0.679 221.9 0.0 5.50e-04 0.00e+00 80.670 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.254 0.224 - - 4.77e-02 6.19e-03 57.080 57
CPL 0.984 0.787 198.5 0.0 6.46e-02 1.06e-01 56.840 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: 5.120000 sec.
T50 in the 50-300 keV band: 2.240000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 178.268 -2.848 175.420
T90 161.132 -2.232 158.900
T50 120.612 -0.104 120.508
Peak 1.000 0.012 1.012
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
305.4343 -4.6546 0.0154 45.7 31.7 2.0763 12.5 TRIG_00908329
------------------------------------------
Foreground time interval of the image:
-2.848 10.581 (delta_t = 13.429 [sec])
Background time interval of the image:
-239.120 -2.848 (delta_t = 236.272 [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 -2.848 sec. to 175.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83555 ( -0.234123 0.246702 )
Norm@50keV : 1.41711E-03 ( -0.000202476 0.000196302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.10 using 59 PHA bins.
# Reduced chi-squared = 1.440 for 57 degrees of freedom
# Null hypothesis probability = 1.640336e-02
Photon flux (15-150 keV) in 178.3 sec: 0.198031 ( -0.0247863 0.0248591 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32382e-06 ( -3.29161e-07 3.33571e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.848 sec. to 175.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.65870 ( -1.10473 0.253243 )
Epeak [keV] : 221.892 ( )
Norm@50keV : 5.50208E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.67 using 59 PHA bins.
# Reduced chi-squared = 1.441 for 56 degrees of freedom
# Null hypothesis probability = 1.709493e-02
Photon flux (15-150 keV) in 178.3 sec: 0.198571 ( -0.025339 0.024386 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32343e-06 ( -3.2875e-07 3.24863e-07 ) ergs/cm2
Band function
Time interval is from -2.848 sec. to 175.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.49136 ( 1.49177 1.49177 )
beta : -1.83518 ( -0.246251 0.23395 )
Epeak [keV] : 17.5873 ( -17.4512 -17.4512 )
Norm@50keV : 3.27165E-03 ( -0.0020372 0.216004 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.10 using 59 PHA bins.
# Reduced chi-squared = 1.493 for 55 degrees of freedom
# Null hypothesis probability = 1.038110e-02
Photon flux (15-150 keV) in 178.3 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] : 11.2541 (-1.91001 2.40215)
R^2/D10^2 : 5.69872E-02 (-0.0289823 0.0574985)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 108.75 using 59 PHA bins.
# Reduced chi-squared = 1.9079 for 57 degrees of freedom
# Null hypothesis probability = 4.382753e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.700e-07 6.624e-08
25- 50 7.860e-07 1.434e-07
50-150 5.721e-07 1.975e-07
15-150 1.628e-06 2.932e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 111.475 (-44.8453 -110.434)
Norm : 0.834003 (-0.123149 0.191886)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.05 using 59 PHA bins.
# Reduced chi-squared = 1.492 for 57 degrees of freedom
# Null hypothesis probability = 9.398654e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.882e-07 6.963e-08
25- 50 6.855e-07 1.151e-07
50-150 1.178e-06 6.284e-07
15-150 2.252e-06 7.825e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.55758 (-2.20388 2.21006)
R1^2/D10^2 : 0.347861 (-0.220858 1.35901)
kT2 [keV] : 32.0055 (-13.0642 67.485)
R2^2/D10^2 : 1.03112E-03 (-0.000934851 0.002818)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.99 using 59 PHA bins.
# Reduced chi-squared = 1.527 for 55 degrees of freedom
# Null hypothesis probability = 7.150503e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.266e-07 1.949e-07
25- 50 6.581e-07 2.839e-07
50-150 1.322e-06 7.409e-07
15-150 2.407e-06 9.864e-07
Peak spectrum fit
Power-law model
Time interval is from 0.012 sec. to 1.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25427 ( -0.225373 0.223596 )
Norm@50keV : 4.77127E-02 ( -0.00619394 0.00618457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.08 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 57 degrees of freedom
# Null hypothesis probability = 4.720392e-01
Photon flux (15-150 keV) in 1 sec: 5.64706 ( -0.74641 0.747545 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.76969e-07 ( -6.91292e-08 6.97861e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.012 sec. to 1.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.984081 ( -1.10306 0.470273 )
Epeak [keV] : 198.510 ( -198.564 -198.564 )
Norm@50keV : 6.46073E-02 ( -0.0624389 0.149153 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 56 degrees of freedom
# Null hypothesis probability = 4.436900e-01
Photon flux (15-150 keV) in 1 sec: 5.59142 ( -0.77464 0.77005 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.69222e-07 ( -7.6035e-08 7.4127e-08 ) ergs/cm2
Band function
Time interval is from 0.012 sec. to 1.012 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.788968 ( 0.787505 5.78125 )
beta : -1.49923 ( 1.5027 0.452441 )
Epeak [keV] : 127.231 ( -126.539 434.351 )
Norm@50keV : 8.22915E-02 ( -0.0408561 5711.25 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.60 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.149478e-01
Photon flux (15-150 keV) in 1 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] : 17.5781 (-2.56128 3.19761)
R^2/D10^2 : 0.398451 (-0.171726 0.279345)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.28 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 57 degrees of freedom
# Null hypothesis probability = 1.872793e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.483e-08 6.380e-09
25- 50 1.128e-07 2.641e-08
50-150 2.514e-07 5.915e-08
15-150 3.890e-07 7.470e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-45.704 -200)
Norm : 23.2836 (-3.05628 3.05628)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.66 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.131809e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.800e-08 3.277e-08
25- 50 1.116e-07 6.175e-08
50-150 2.447e-07 1.359e-07
15-150 4.143e-07 2.303e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.59129 (-3.27262 10.4354)
R1^2/D10^2 : 8.87867 (-8.31803 38.2495)
kT2 [keV] : 23.1104 (-5.66545 -23.151)
R2^2/D10^2 : 0.140547 (-0.122613 0.247248)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 55 degrees of freedom
# Null hypothesis probability = 3.529809e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.666e-08 2.408e-08
25- 50 1.020e-07 5.368e-08
50-150 2.964e-07 1.620e-07
15-150 4.451e-07 2.053e-07
Plot creation:
Fri Jun 14 18:42:21 EDT 2019