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
95.8754 -64.8986 0.0367 24.7 -24.6 0.1080 5.2 TRIG_00819863
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.944 -34.704 (delta_t = 26.240 [sec])
-33.944 -10.944 (delta_t = 23.000 [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 1.024000
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 1.024000
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 1.024000
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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.877792 ( -1.15956 0.850303 )
Norm@50keV : 2.65353E-03 ( -0.00221129 0.00230788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8340 for 57 degrees of freedom
# Null hypothesis probability = 8.097502e-01
Photon flux (15-150 keV) in 1.024 sec: 0.548661 ( -0.345997 0.196743 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91564e-08 ( -5.16664e-08 2.66049e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.33102 ( 9.41166 8.93868 )
Epeak [keV] : 134.448 ( -24.2208 865.902 )
Norm@50keV : 5.24599E-02 ( -0.0630085 0.0841016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.78 using 59 PHA bins.
# Reduced chi-squared = 0.8175 for 56 degrees of freedom
# Null hypothesis probability = 8.333450e-01
Photon flux (15-150 keV) in 1.024 sec: 0.555304 ( -0.159271 0.161579 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75411e-08 ( -3.00424e-08 2.97042e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.440546 ( 0.44134 0.44134 )
beta : 0.877838 ( -0.850118 1.15975 )
Epeak [keV] : 11.7761 ( -11.7743 -11.7743 )
Norm@50keV : 5.08517E-03 ( -0.00508563 14564.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8644 for 55 degrees of freedom
# Null hypothesis probability = 7.523376e-01
Photon flux (15-150 keV) in 1.024 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] : 200.000 (-200 -200)
R^2/D10^2 : 3.19860E-04 (-9.39053e-05 -0.000319521)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8323 for 57 degrees of freedom
# Null hypothesis probability = 8.125538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.404e-10 4.180e-10
25- 50 4.369e-09 3.426e-09
50-150 8.640e-08 8.980e-08
15-150 9.131e-08 9.155e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-102.718 -200)
Norm : 1.64294 (-0.880084 0.880084)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.268266e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.191e-09 2.941e-09
25- 50 8.062e-09 5.852e-09
50-150 1.768e-08 1.233e-08
15-150 2.993e-08 2.070e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.61271 (-4.39912 -4.39912)
R1^2/D10^2 : 0.885138 (-0.900564 11.1536)
kT2 [keV] : 199.322 (-199.328 -199.328)
R2^2/D10^2 : 3.17177E-04 (-9.45664e-05 0.00209465)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8549 for 55 degrees of freedom
# Reduced chi-squared = 0.8544 for 55 degrees of freedom
# Null hypothesis probability = 7.692930e-01
# Null hypothesis probability = 7.702080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-09 1.048e-09
25- 50 4.419e-09 2.061e-09
50-150 8.576e-08 4.447e-08
15-150 9.197e-08 4.590e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.877792 ( -1.15956 0.850303 )
Norm@50keV : 2.65353E-03 ( -0.00221129 0.00230788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8340 for 57 degrees of freedom
# Null hypothesis probability = 8.097502e-01
Photon flux (15-150 keV) in 1.024 sec: 0.548661 ( -0.345997 0.196743 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91564e-08 ( -5.16664e-08 2.66049e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.33102 ( 9.41166 8.9387 )
Epeak [keV] : 134.448 ( -24.2208 861.254 )
Norm@50keV : 5.24599E-02 ( -0.0630085 0.0841016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.78 using 59 PHA bins.
# Reduced chi-squared = 0.8175 for 56 degrees of freedom
# Null hypothesis probability = 8.333450e-01
Photon flux (15-150 keV) in 1.024 sec: 0.555304 ( -0.159271 0.161579 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75411e-08 ( -3.00424e-08 2.97042e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.440546 ( 0.44134 0.44134 )
beta : 0.877838 ( -0.850118 1.15975 )
Epeak [keV] : 11.7761 ( -11.7743 -11.7743 )
Norm@50keV : 5.08517E-03 ( -0.00508563 14564.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8644 for 55 degrees of freedom
# Null hypothesis probability = 7.523376e-01
Photon flux (15-150 keV) in 1.024 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] : 200.000 (-200 -200)
R^2/D10^2 : 3.19860E-04 (-9.39053e-05 -0.000319521)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8323 for 57 degrees of freedom
# Null hypothesis probability = 8.125538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.404e-10 4.514e-10
25- 50 4.369e-09 3.568e-09
50-150 8.640e-08 8.945e-08
15-150 9.131e-08 9.411e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-102.718 -200)
Norm : 1.64294 (-0.880084 0.880084)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.268266e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.191e-09 3.101e-09
25- 50 8.062e-09 5.678e-09
50-150 1.768e-08 1.274e-08
15-150 2.993e-08 2.009e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.61271 (-4.39912 -4.39912)
R1^2/D10^2 : 0.885138 (-0.900564 11.1536)
kT2 [keV] : 199.322 (-199.328 -199.328)
R2^2/D10^2 : 3.17177E-04 (-9.45664e-05 0.00209465)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.99 using 59 PHA bins.
# Reduced chi-squared = 0.8549 for 55 degrees of freedom
# Reduced chi-squared = 0.8544 for 55 degrees of freedom
# Null hypothesis probability = 7.692930e-01
# Null hypothesis probability = 7.702080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-09 1.153e-09
25- 50 4.419e-09 2.045e-09
50-150 8.576e-08 4.368e-08
15-150 9.197e-08 3.494e-08
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: -0.877792 ( -1.15956 0.850303 )
Norm@50keV : 2.65353E-03 ( -0.00221129 0.00230788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8340 for 57 degrees of freedom
# Null hypothesis probability = 8.097502e-01
Photon flux (15-150 keV) in 1.024 sec: 0.548661 ( -0.345997 0.196743 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91564e-08 ( -5.16664e-08 2.66049e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.33102 ( 9.41166 8.9389 )
Epeak [keV] : 134.448 ( -24.2208 855.519 )
Norm@50keV : 5.24599E-02 ( -0.0630085 0.0841016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.78 using 59 PHA bins.
# Reduced chi-squared = 0.8175 for 56 degrees of freedom
# Null hypothesis probability = 8.333450e-01
Photon flux (15-150 keV) in 1.024 sec: 0.555304 ( -0.159271 0.161579 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75411e-08 ( -3.00424e-08 2.97042e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.440546 ( 0.44134 0.44134 )
beta : 0.877838 ( -0.850118 1.15975 )
Epeak [keV] : 11.7761 ( -11.7743 -11.7743 )
Norm@50keV : 5.08517E-03 ( -0.00508563 14564.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8644 for 55 degrees of freedom
# Null hypothesis probability = 7.523376e-01
Photon flux (15-150 keV) in 1.024 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) = 3.27e-09
S(50-100 keV) = 2.40e-08
T90 vs. Hardness ratio plot
T90 = 1.02400004863739 sec.
Hardness ratio (energy fluence ratio) = 7.33945
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.52739
Count Ratio (50-100 keV) / (15-25 keV) = 15.9726
Mask shadow pattern
IMX = 4.180508213382130E-01, IMY = 1.912629989691521E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-60.944000 -34.704000
-33.944000 -10.944000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5281 -40.3876 9.1 42.0 30.5 0.7313 1.3 10.0 Vela X-1
169.9698 -60.6749 10.2 19.3 70.0 0.3136 1.1 10.6 Cen X-3
186.8735 -62.6250 5.1 17.8 95.6 -0.6319 -2.3 10.6 GX 301-2
256.0956 -37.7204 4.2 51.8 165.2 -2.6205 -2.8 9.0 4U 1700-377
256.4164 -36.4227 19.1 53.1 165.2 0.6343 0.6 0.9 GX 349+2
264.7451 -44.3350 4.5 46.9 175.6 -1.4600 -2.6 6.9 4U 1735-44
266.9683 -53.8365 3.2 38.1 -178.7 1.2129 3.6 ------ UNKNOWN
325.0654 -51.0480 2.6 48.0 -129.1 4.3533 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 1.024000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5134 -40.4409 10.0 41.9 30.5 -0.0528 -1.2 6.9 Vela X-1
170.0856 -60.5157 3.6 19.5 70.1 0.0735 3.2 9.4 Cen X-3
186.6625 -62.8452 6.7 17.6 95.4 -0.0386 -1.7 4.5 GX 301-2
255.8366 -37.8406 22.9 51.6 165.0 0.0388 0.5 7.1 4U 1700-377
256.4853 -36.4075 24.9 53.2 165.2 0.0395 0.5 2.6 GX 349+2
264.6323 -44.3664 6.3 46.8 175.5 -0.0790 -1.8 6.9 4U 1735-44
95.8753 -64.8987 2.2 24.7 -24.6 0.1080 5.2 ------ UNKNOWN
90.0770 -52.8819 2.7 37.0 -22.0 0.1085 4.3 ------ UNKNOWN
335.3671 -54.8880 2.7 44.8 -120.1 0.3748 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Sat Mar 31 02:17:24 EDT 2018