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
353.5840 -48.3042 0.0408 32.7 -162.4 0.2581 4.7 TRIG_00992444
------------------------------------------
Foreground time interval of the image:
0.000 16.384 (delta_t = 16.384 [sec])
Background time interval of the image:
-126.507 -35.008 (delta_t = 91.499 [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 0.000 sec. to 16.384 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.35145 ( -0.865843 1.13613 )
Norm@50keV : 2.80732E-04 ( -0.000278007 0.000293424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.34 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 57 degrees of freedom
# Null hypothesis probability = 2.352267e-01
Photon flux (15-150 keV) in 16.38 sec: 0.100782 ( -0.0394713 0.0405547 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.62286e-08 ( -2.84814e-08 3.65222e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99898 ( 9.9997 4.79437 )
Epeak [keV] : 21.3283 ( -2.47542 2.46851 )
Norm@50keV : 7.46662E+06 ( -7.51278e+06 4.98858e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.37 using 59 PHA bins.
# Reduced chi-squared = 0.9529 for 56 degrees of freedom
# Null hypothesis probability = 5.752279e-01
Photon flux (15-150 keV) in 16.38 sec: 0.119636 0.119846 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.724e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -1.4033 -5 )
beta : -9.37167 ( 9.37167 5.33909 )
Epeak [keV] : 20.0713 ( -3.17495 3.50581 )
Norm@50keV : 955.353 ( -302.008 2550.36 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.289096e-01
Photon flux (15-150 keV) in 16.38 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] : 4.47917 (-1.02995 1.23424)
R^2/D10^2 : 1.69634 (-1.68029 3.90281)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.62 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.159071e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.260e-08 2.569e-08
25- 50 2.100e-08 1.411e-08
50-150 4.867e-10 5.458e-10
15-150 6.409e-08 3.948e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.9054 (-5.12011 10.2668)
Norm : 2.65282 (-1.58388 4.50163)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.67 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.126261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.868e-08 2.277e-08
25- 50 2.072e-08 1.345e-08
50-150 2.217e-09 2.577e-09
15-150 6.162e-08 3.815e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.50180 (-0.984925 1.28018)
R1^2/D10^2 : 1.66329 (-1.65041 3.92934)
kT2 [keV] : 9.99616E-04 (-0.000999616 -0.000999616)
R2^2/D10^2 : 1.19878E-04 (-0.000120098 -0.000120098)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.61 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 55 degrees of freedom
# Null hypothesis probability = 3.443809e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.35145 ( -0.865843 1.13613 )
Norm@50keV : 2.80732E-04 ( -0.000278007 0.000293424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.34 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 57 degrees of freedom
# Null hypothesis probability = 2.352267e-01
Photon flux (15-150 keV) in 16.38 sec: 0.100782 ( -0.0394713 0.0405547 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.62286e-08 ( -2.84814e-08 3.65222e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99898 ( 9.9997 4.79437 )
Epeak [keV] : 21.3283 ( -2.47542 2.46851 )
Norm@50keV : 7.46662E+06 ( -7.51278e+06 4.98858e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.37 using 59 PHA bins.
# Reduced chi-squared = 0.9529 for 56 degrees of freedom
# Null hypothesis probability = 5.752279e-01
Photon flux (15-150 keV) in 16.38 sec: 0.119636 0.119846 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.724e-17 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 16.384 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -1.4033 -5 )
beta : -9.37167 ( 9.37167 5.33909 )
Epeak [keV] : 20.0713 ( -3.17495 3.50581 )
Norm@50keV : 955.353 ( -302.008 2550.36 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.289096e-01
Photon flux (15-150 keV) in 16.38 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] : 4.47917 (-1.02995 1.23424)
R^2/D10^2 : 1.69634 (-1.68029 3.90281)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.62 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.159071e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.260e-08 2.628e-08
25- 50 2.100e-08 1.499e-08
50-150 4.867e-10 6.058e-10
15-150 6.409e-08 3.862e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.9054 (-5.12011 10.2668)
Norm : 2.65282 (-1.58388 4.50163)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.67 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.126261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.868e-08 2.264e-08
25- 50 2.072e-08 1.397e-08
50-150 2.217e-09 2.662e-09
15-150 6.162e-08 3.940e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.50180 (-0.984925 1.28018)
R1^2/D10^2 : 1.66329 (-1.65041 3.92934)
kT2 [keV] : 9.99616E-04 (-0.000999616 -0.000999616)
R2^2/D10^2 : 1.19878E-04 (-0.000120098 -0.000120098)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.61 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 55 degrees of freedom
# Null hypothesis probability = 3.443809e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 3.35145 ( -0.865843 1.13613 )
Norm@50keV : 2.80732E-04 ( -0.000278007 0.000293424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.34 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 57 degrees of freedom
# Null hypothesis probability = 2.352267e-01
Photon flux (15-150 keV) in 16.38 sec: 0.100782 ( -0.0394713 0.0405547 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.62286e-08 ( -2.84814e-08 3.65222e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99898 ( 9.9997 4.79437 )
Epeak [keV] : 21.3283 ( -2.47542 2.46851 )
Norm@50keV : 7.46662E+06 ( -7.51278e+06 4.98858e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.37 using 59 PHA bins.
# Reduced chi-squared = 0.9529 for 56 degrees of freedom
# Null hypothesis probability = 5.752279e-01
Photon flux (15-150 keV) in 16.38 sec: 0.119636 0.119846 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.724e-17 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -1.4033 -5 )
beta : -9.37167 ( 9.37167 5.33909 )
Epeak [keV] : 20.0713 ( -3.17495 3.50581 )
Norm@50keV : 955.353 ( -302.008 2550.36 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Null hypothesis probability = 4.289096e-01
Photon flux (15-150 keV) in 16.38 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) = 2.11e-08
S(50-100 keV) = 8.01e-09
T90 vs. Hardness ratio plot
T90 = 16.3839999437332 sec.
Hardness ratio (energy fluence ratio) = 0.379621
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.206888
Count Ratio (50-100 keV) / (15-25 keV) = -0.133032
Mask shadow pattern
IMX = 0, IMY = 0
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
-126.507400 -35.008000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.8837 -37.8392 2.5 46.2 -42.5 1.4450 4.7 4.9 4U 1700-377
256.2628 -36.3738 5.4 46.3 -40.4 0.6376 2.1 8.8 GX 349+2
263.0230 -24.9518 52.3 44.6 -22.6 0.0519 0.2 12.4 GX 1+4
264.7428 -44.4483 46.9 38.7 -50.8 0.0623 0.2 0.1 4U 1735-44
268.4408 -1.6009 6.6 53.3 7.2 -0.7851 -1.8 9.9 SW J1753.5-0127
270.3398 -24.9800 4.4 38.5 -18.5 0.4291 2.6 6.7 GX 5-1
270.2875 -25.7032 6.0 38.3 -19.6 0.3143 1.9 2.5 GRS 1758-258
274.0064 -14.0361 91.8 41.1 -1.0 0.0253 0.1 0.0 GX 17+2
275.9460 -30.2001 5.8 32.0 -24.0 0.2855 2.0 10.1 H1820-303
285.1703 -24.9623 5.0 26.4 -7.7 -0.3030 -2.3 7.7 HT1900.1-2455
262.8581 -33.7630 191.5 41.7 -34.8 0.0141 0.1 7.8 GX 354-0
300.7509 6.6978 2.6 42.6 50.4 1.7114 4.5 ------ UNKNOWN
352.0691 -37.8140 2.1 31.0 177.8 0.8132 5.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 16.384000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.8435 -37.8888 5.1 46.2 -42.6 -0.2881 -2.3 7.3 4U 1700-377
256.4146 -36.5581 4.2 46.1 -40.6 0.3164 2.7 8.2 GX 349+2
263.0252 -24.5771 62.0 44.7 -22.1 -0.0170 -0.2 10.1 GX 1+4
264.7529 -44.3582 8.8 38.7 -50.7 0.1215 1.3 5.5 4U 1735-44
268.3456 -1.4864 5.9 53.4 7.3 0.3500 1.9 2.4 SW J1753.5-0127
270.3769 -24.9916 5.5 38.5 -18.5 -0.1379 -2.1 7.3 GX 5-1
270.4931 -25.7639 6.4 38.1 -19.6 0.1155 1.8 10.4 GRS 1758-258
274.0621 -14.0199 7.9 41.0 -0.9 0.1158 1.4 3.4 GX 17+2
276.0159 -30.4547 3.7 31.9 -24.4 0.1778 3.2 7.1 H1820-303
284.9834 -24.8085 6.4 26.6 -7.6 0.0893 1.8 7.3 HT1900.1-2455
263.0662 -33.6998 3.7 41.6 -34.6 -0.2643 -3.1 9.0 GX 354-0
9.0042 -25.3072 2.3 48.2 164.7 0.6371 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
130.492600 615.282000
615.992000 963.053600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
6.4764 -6.4756 3.0 43.2 143.9 6.6683 3.9 548.9 UNKNOWN
22.1972 -10.4577 3.0 44.8 167.0 5.5794 3.8 ------ UNKNOWN
49.3053 -26.1673 3.4 48.3 -151.4 5.1812 3.5 ------ UNKNOWN
96.0785 -83.6164 3.2 43.5 -64.1 9.8670 3.6 ------ UNKNOWN
Plot creation:
Sun Aug 23 13:08:54 EDT 2020