Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
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
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
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
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18982 ( -7.03209 -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
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
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.59e-09
S(50-100 keV) = 6.53e-09
T90 vs. Hardness ratio plot
T90 = 0.25600004196167 sec.
Hardness ratio (energy fluence ratio) = 2.52124
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = -29.6314
Count Ratio (50-100 keV) / (15-25 keV) = -22.8329
Mask shadow pattern
IMX = 3.297769329111663E-01, IMY = 1.409847255771427E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
-60.560000 -2.560000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4234 -40.3597 0.0 6.5 26.2 -0.0663 -0.7 12.6 Vela X-1
170.1988 -60.7174 15.5 35.9 31.5 0.1120 0.7 6.6 Cen X-3
186.6251 -62.9144 10.3 44.0 30.8 0.2182 1.1 8.7 GX 301-2
91.2545 -54.4675 2.6 32.9 106.1 0.7510 4.4 ------ UNKNOWN
193.0126 -17.5498 3.2 58.0 -26.4 2.0648 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.256000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5879 -40.5799 7.4 6.8 26.7 -0.0085 -1.6 3.1 Vela X-1
170.3174 -60.6232 225.5 35.9 31.4 -0.0004 -0.1 0.0 Cen X-3
186.9948 -62.8237 0.0 44.1 30.6 -0.0114 -0.9 9.8 GX 301-2
166.7195 -58.8273 2.2 33.5 30.0 0.0405 5.2 ------ UNKNOWN
179.7531 -16.9949 2.5 47.5 -35.4 0.0623 4.7 ------ UNKNOWN
177.9725 -15.1763 2.1 47.1 -38.7 0.0733 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
66.640600 242.535900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.3357 -40.4035 0.0 16.3 160.7 -0.0085 -0.0 12.6 Vela X-1
170.2176 -60.4808 7.4 28.5 83.1 -0.4508 -1.6 9.0 Cen X-3
186.9232 -62.7658 5.1 35.4 74.3 1.0550 2.3 7.3 GX 301-2
110.0291 -47.7663 2.5 35.6 153.2 1.4498 4.6 ------ UNKNOWN
90.9979 -22.9309 3.6 55.8 -176.7 2.4690 3.2 ------ UNKNOWN
Plot creation:
Tue Aug 18 18:06:41 EDT 2020