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
135.4753 -40.2965 0.0281 16.9 14.8 1.4895 6.9 TRIG_01071762
------------------------------------------
Foreground time interval of the image:
-67.000 29.000 (delta_t = 96.000 [sec])
Background time interval of the image:
-179.000 -67.000 (delta_t = 112.000 [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 72.000000
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 72.000000
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 72.000000
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 -67.000 sec. to 29.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.64010 ( -0.213314 0.230234 )
Norm@50keV : 9.22781E-04 ( -0.000165672 0.000169333 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.70 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 57 degrees of freedom
# Null hypothesis probability = 2.527116e-01
Photon flux (15-150 keV) in 96 sec: 0.198019 ( -0.0194514 0.0194638 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.23492e-07 ( -1.14989e-07 1.20097e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -67.000 sec. to 29.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.84851 ( -3.14304 1.61783 )
Epeak [keV] : 25.0094 ( -3.52546 2.80928 )
Norm@50keV : 1.27417 ( -1.25927 78.2943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.35 using 59 PHA bins.
# Reduced chi-squared = 0.8099 for 56 degrees of freedom
# Null hypothesis probability = 8.446661e-01
Photon flux (15-150 keV) in 96 sec: 0.185171 ( -0.018919 0.019022 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.32942e-07 ( -8.30736e-08 9.11174e-08 ) ergs/cm2
Band function
Time interval is from -67.000 sec. to 29.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.93585 ( -1.19127 -0.816336 )
beta : -4.80681 ( 4.29577 0.968398 )
Epeak [keV] : 24.9086 ( -3.4729 3.11983 )
Norm@50keV : 1.50132 ( -1.53492 100.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.55 using 59 PHA bins.
# Reduced chi-squared = 0.8101 for 55 degrees of freedom
# Null hypothesis probability = 8.419511e-01
Photon flux (15-150 keV) in 96 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64913e-07 ( -7.64241e-07 -9.91277e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.38412 (-0.550685 0.600394)
R^2/D10^2 : 0.571095 (-0.183999 0.274374)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.30 using 59 PHA bins.
# Reduced chi-squared = 0.7947 for 57 degrees of freedom
# Null hypothesis probability = 8.681329e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.229e-07 4.411e-08
25- 50 3.675e-07 5.779e-08
50-150 4.311e-08 1.818e-08
15-150 7.334e-07 8.683e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.1985 (-4.55114 6.04725)
Norm : 1.96153 (-0.398114 0.520137)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.375e-07 4.128e-08
25- 50 3.387e-07 4.690e-08
50-150 1.372e-07 5.579e-08
15-150 8.134e-07 1.247e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.19668 (-6.19809 0.685841)
R1^2/D10^2 : 0.630855 (-0.221837 0.32623)
kT2 [keV] : 27.4540 (-27.7675 -27.7675)
R2^2/D10^2 : 2.20452E-04 (-0.00020284 0.7913)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.258e-07 6.922e-08
25- 50 3.611e-07 1.012e-07
50-150 1.217e-07 7.128e-08
15-150 8.086e-07 1.996e-07
Peak spectrum fit
Power-law model
Time interval is from 4.500 sec. to 5.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94725 ( -1.47105 2.42426 )
Norm@50keV : 1.81171E-03 ( -0.00181171 0.00155662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.20 using 59 PHA bins.
# Reduced chi-squared = 0.7052 for 57 degrees of freedom
# Null hypothesis probability = 9.552509e-01
Photon flux (15-150 keV) in 1 sec: 0.265372 ( -0.168661 0.16911 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66711e-08 ( -1.26102e-08 1.62821e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.500 sec. to 5.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99895 ( 9.99996 12.2308 )
Epeak [keV] : 30.6062 ( -6.96481 7.60285 )
Norm@50keV : 2.09659E+05 ( -210899 3.46955e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.90 using 59 PHA bins.
# Reduced chi-squared = 0.6947 for 56 degrees of freedom
# Null hypothesis probability = 9.601719e-01
Photon flux (15-150 keV) in 1 sec: 0.264556 ( -0.167925 0.168393 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65526e-08 ( -1.2812e-08 1.61439e-08 ) ergs/cm2
Band function
Time interval is from 4.500 sec. to 5.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -14.5864 -5 )
beta : -5.98485 ( 5.54179 5.54179 )
Epeak [keV] : 29.9878 ( -29.9876 11.9728 )
Norm@50keV : 113.401 ( -68.8949 1.01237e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.56 using 59 PHA bins.
# Reduced chi-squared = 0.7193 for 55 degrees of freedom
# Null hypothesis probability = 9.421140e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.21766 (-3.29191 9.14786)
R^2/D10^2 : 0.441673 (-0.439229 4.57107)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.811e-09 2.526e-09
25- 50 5.535e-09 3.961e-09
50-150 1.023e-09 1.122e-09
15-150 1.037e-08 7.355e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.2691 (-64.5638 -64.5638)
Norm : 1.33203 (-1.32867 8.35562)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.382e-09 2.456e-09
25- 50 5.254e-09 3.753e-09
50-150 6.321e-09 6.895e-09
15-150 1.496e-08 1.205e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.998 (-199.998 -199.998)
R1^2/D10^2 : 4.18927E-05 (-4.18927e-05 -4.18927e-05)
kT2 [keV] : 6.66728 (-1.97883 6.13924)
R2^2/D10^2 : 0.561228 (-0.495854 1.89061)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.808e-09 1.098e-01
25- 50 5.547e-09 9.965e-01
50-150 1.031e-09 2.074e+01
15-150 1.039e-08 2.321e+01
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: 2.64010 ( -0.213314 0.230234 )
Norm@50keV : 9.22781E-04 ( -0.000165672 0.000169333 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.70 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 57 degrees of freedom
# Null hypothesis probability = 2.527116e-01
Photon flux (15-150 keV) in 96 sec: 0.198019 ( -0.0194514 0.0194638 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.23492e-07 ( -1.14989e-07 1.20097e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.84851 ( -3.14304 1.61783 )
Epeak [keV] : 25.0094 ( -3.52546 2.80928 )
Norm@50keV : 1.27417 ( -1.25927 78.2943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.35 using 59 PHA bins.
# Reduced chi-squared = 0.8099 for 56 degrees of freedom
# Null hypothesis probability = 8.446661e-01
Photon flux (15-150 keV) in 96 sec: 0.185171 ( -0.018919 0.019022 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.32942e-07 ( -8.30736e-08 9.11174e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.93585 ( -1.19127 -0.816336 )
beta : -4.80681 ( 4.29577 0.968398 )
Epeak [keV] : 24.9086 ( -3.4729 3.11983 )
Norm@50keV : 1.50132 ( -1.53492 100.067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.55 using 59 PHA bins.
# Reduced chi-squared = 0.8101 for 55 degrees of freedom
# Null hypothesis probability = 8.419511e-01
Photon flux (15-150 keV) in 96 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64913e-07 ( -7.64241e-07 -9.91277e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.10e-07
S(50-100 keV) = 1.99e-07
T90 vs. Hardness ratio plot
T90 = 80 sec.
Hardness ratio (energy fluence ratio) = 0.641935
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.818444
Count Ratio (50-100 keV) / (15-25 keV) = 0.133544
Mask shadow pattern
IMX = 2.935756931385835E-01, IMY = -7.747038293475868E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000
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:
-179.000000 -67.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5877 -40.4715 21.5 17.1 14.8 0.1828 0.5 5.7 Vela X-1
170.5297 -60.5796 23.9 46.3 9.9 0.3137 0.5 6.8 Cen X-3
186.6829 -62.8366 103.6 54.2 8.7 -0.1364 -0.1 4.0 GX 301-2
88.1767 -23.6068 3.2 35.2 121.8 2.2771 3.7 ------ UNKNOWN
85.9152 -0.6742 2.5 46.4 153.0 5.5447 4.7 ------ UNKNOWN
128.3361 -60.0304 3.0 35.0 36.6 1.9027 3.8 ------ UNKNOWN
95.5138 13.0778 2.5 48.9 175.4 3.9605 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-67.000000 29.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5349 -40.3496 0.0 17.0 14.7 1.4148 6.5 12.3 Vela X-1
170.5055 -60.7592 13.8 46.4 10.1 -0.3836 -0.8 9.9 Cen X-3
186.3962 -62.6789 41.1 54.1 8.6 -0.2339 -0.3 9.0 GX 301-2
129.7714 7.2462 2.0 32.4 -136.9 1.7837 5.7 ------ UNKNOWN
162.0048 -17.7344 2.9 33.4 -57.8 1.2723 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
123.200600 239.000000
240.000000 363.065600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4757 -40.3465 0.0 0.1 5.5 3.1323 11.2 12.7 Vela X-1
170.0075 -60.6335 5.1 29.3 21.3 0.8267 2.3 9.1 Cen X-3
186.3224 -62.6775 0.0 37.3 19.9 4.9179 9.9 10.7 GX 301-2
203.8483 -55.9094 2.1 46.1 9.6 3.1101 5.6 ------ UNKNOWN
129.9823 -49.4648 2.6 9.9 76.9 1.4186 4.5 ------ UNKNOWN
92.3348 2.9299 3.2 58.5 -177.3 7.4945 3.6 ------ UNKNOWN
213.6044 -37.5692 2.5 58.8 -9.2 7.7637 4.7 ------ UNKNOWN
209.8490 -30.8787 3.2 59.5 -17.8 7.1739 3.7 ------ UNKNOWN
Plot creation:
Sat Sep 4 19:49:33 EDT 2021