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
163.5411 -49.6017 0.0407 28.2 -155.5 0.0812 4.7 TRIG_00954840
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.496 -55.020 (delta_t = 5.476 [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: -0.475061 ( -1.93756 1.01476 )
Norm@50keV : 2.00417E-03 ( -0.0016775 0.00187482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7592 for 57 degrees of freedom
# Null hypothesis probability = 9.103011e-01
Photon flux (15-150 keV) in 1.024 sec: 0.331963 ( -0.29809 0.163277 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.01992e-08 ( -5.01992e-08 2.03052e-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: -0.713560 ( )
Epeak [keV] : 975.285 ( )
Norm@50keV : 2.29825E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7726 for 56 degrees of freedom
# Null hypothesis probability = 8.933572e-01
Photon flux (15-150 keV) in 1.024 sec: 0.332129 ( -0.25111 0.16247 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.0559e-08 ( -2.04578e-08 2.08732e-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 : 0.306605 ( -0.306605 -0.306605 )
beta : 0.475045 ( -1.01473 1.93813 )
Epeak [keV] : 22.0057 ( -22.0057 -22.0057 )
Norm@50keV : 3.35385E-03 ( -0.00335384 3106.18 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7868 for 55 degrees of freedom
# Null hypothesis probability = 8.737968e-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] : 96.1075 (-99.155 -99.155)
R^2/D10^2 : 5.05439E-04 (-0.000487639 0.00489382)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.30 using 59 PHA bins.
# Reduced chi-squared = 0.7596 for 57 degrees of freedom
# Null hypothesis probability = 9.098633e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.015e-10 2.192e-10
25- 50 2.422e-09 1.881e-09
50-150 4.663e-08 4.135e-08
15-150 4.935e-08 4.472e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.343 (-125.358 -199.356)
Norm : 1.08096 (-0.751529 0.756047)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.24 using 59 PHA bins.
# Reduced chi-squared = 0.9516 for 57 degrees of freedom
# Null hypothesis probability = 5.792537e-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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 4.04903E-05 (-4.09198e-05 -4.09198e-05)
kT2 [keV] : 84.5953 (-84.4589 -84.4589)
R2^2/D10^2 : 4.99298E-04 (-0.000498071 0.200886)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 43.28 using 59 PHA bins.
# Reduced chi-squared = 0.7871 for 55 degrees of freedom
# Reduced chi-squared = 0.7869 for 55 degrees of freedom
# Null hypothesis probability = 8.733627e-01
# Null hypothesis probability = 8.736823e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.281e-10 4.782e-09
25- 50 2.605e-09 4.116e-08
50-150 4.777e-08 9.810e-07
15-150 5.071e-08 1.265e-06
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: -0.475061 ( -1.93756 1.01476 )
Norm@50keV : 2.00417E-03 ( -0.0016775 0.00187482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7592 for 57 degrees of freedom
# Null hypothesis probability = 9.103011e-01
Photon flux (15-150 keV) in 1.024 sec: 0.331963 ( -0.29809 0.163277 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.01992e-08 ( -5.01992e-08 2.03052e-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: -0.713560 ( -9.24623 1.24093 )
Epeak [keV] : 975.285 ( -980.467 -980.467 )
Norm@50keV : 2.29825E-03 ( -0.00229627 1.1249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7726 for 56 degrees of freedom
# Null hypothesis probability = 8.933572e-01
Photon flux (15-150 keV) in 1.024 sec: 0.332129 ( -0.25111 0.16247 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.0559e-08 ( -2.04578e-08 2.08732e-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 : 0.306605 ( -0.306605 -0.306605 )
beta : 0.475045 ( -1.01473 1.93813 )
Epeak [keV] : 22.0057 ( -22.0057 -22.0057 )
Norm@50keV : 3.35385E-03 ( -0.00335384 3106.18 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7868 for 55 degrees of freedom
# Null hypothesis probability = 8.737968e-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] : 96.1075 (-99.155 -99.155)
R^2/D10^2 : 5.05439E-04 (-0.000487639 0.00489382)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.30 using 59 PHA bins.
# Reduced chi-squared = 0.7596 for 57 degrees of freedom
# Null hypothesis probability = 9.098633e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.015e-10 2.254e-10
25- 50 2.422e-09 1.732e-09
50-150 4.663e-08 3.706e-08
15-150 4.935e-08 4.350e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.343 (-125.358 -199.356)
Norm : 1.08096 (-0.751529 0.756047)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.24 using 59 PHA bins.
# Reduced chi-squared = 0.9516 for 57 degrees of freedom
# Null hypothesis probability = 5.792537e-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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 4.04903E-05 (-4.09198e-05 -4.09198e-05)
kT2 [keV] : 84.5953 (-84.4589 -84.4589)
R2^2/D10^2 : 4.99298E-04 (-0.000498071 0.200886)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 43.28 using 59 PHA bins.
# Reduced chi-squared = 0.7871 for 55 degrees of freedom
# Reduced chi-squared = 0.7869 for 55 degrees of freedom
# Null hypothesis probability = 8.733627e-01
# Null hypothesis probability = 8.736823e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.281e-10 4.920e-09
25- 50 2.605e-09 3.974e-08
50-150 4.777e-08 1.052e-06
15-150 5.071e-08 1.051e-06
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: -0.475061 ( -1.93756 1.01476 )
Norm@50keV : 2.00417E-03 ( -0.0016775 0.00187482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7592 for 57 degrees of freedom
# Null hypothesis probability = 9.103011e-01
Photon flux (15-150 keV) in 1.024 sec: 0.331963 ( -0.29809 0.163277 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.01992e-08 ( -5.01992e-08 2.03052e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.713560 ( -9.24623 1.23989 )
Epeak [keV] : 975.285 ( -980.467 -980.467 )
Norm@50keV : 2.29825E-03 ( -0.00229627 1.1249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7726 for 56 degrees of freedom
# Null hypothesis probability = 8.933572e-01
Photon flux (15-150 keV) in 1.024 sec: 0.332129 ( -0.25111 0.16247 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.0559e-08 ( -2.04578e-08 2.08732e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.306605 ( -0.306605 -0.306605 )
beta : 0.475045 ( -1.01473 1.93813 )
Epeak [keV] : 22.0057 ( -22.0057 -22.0057 )
Norm@50keV : 3.35385E-03 ( -0.00335384 3106.18 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.27 using 59 PHA bins.
# Reduced chi-squared = 0.7868 for 55 degrees of freedom
# Null hypothesis probability = 8.737968e-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) = 2.72e-09
S(50-100 keV) = 1.51e-08
T90 vs. Hardness ratio plot
T90 = 1.0239999294281 sec.
Hardness ratio (energy fluence ratio) = 5.55147
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = -1.6161
Count Ratio (50-100 keV) / (15-25 keV) = -4.57818
Mask shadow pattern
IMX = -4.873494816533889E-01, IMY = 2.220885950135381E-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:
-60.496000 -55.020400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5088 -40.5577 2.1 6.8 -143.5 0.1551 5.6 0.9 Vela X-1
170.0035 -60.5368 0.0 35.8 -139.0 -0.0378 -0.9 10.6 Cen X-3
186.4345 -62.7181 3.0 43.9 -139.8 0.2548 3.8 6.9 GX 301-2
80.7883 -5.4468 2.7 54.3 5.0 0.4994 4.3 ------ UNKNOWN
129.3526 -51.2243 2.4 16.0 -104.6 0.1472 4.9 ------ 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] [']
135.5904 -40.6519 6.4 6.9 -143.4 -0.0282 -1.8 6.5 Vela X-1
170.5038 -60.6639 8.7 36.1 -139.0 -0.0308 -1.3 6.1 Cen X-3
186.8411 -62.6109 5.8 44.0 -140.0 -0.0676 -2.0 10.8 GX 301-2
112.4689 -49.8841 2.4 19.5 -70.5 0.0827 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
69.904600 89.534000
90.504000 171.644000
180.504000 182.294000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4757 -40.5080 50.5 21.7 38.5 0.2444 0.2 3.7 Vela X-1
170.3334 -60.6643 5.5 11.7 -82.0 2.1103 2.1 2.5 Cen X-3
186.8270 -62.7003 6.7 18.2 -100.8 1.8069 1.7 6.3 GX 301-2
118.5880 -19.6555 3.3 46.5 47.9 13.5941 3.5 ------ UNKNOWN
158.1496 -14.8293 2.8 35.0 105.3 9.0759 4.2 ------ UNKNOWN
159.0548 -27.4222 3.0 22.4 103.9 4.6051 3.9 ------ UNKNOWN
154.7120 -66.9127 2.8 17.9 -54.2 3.6947 4.1 ------ UNKNOWN
231.7815 -25.2091 3.8 57.2 -154.1 15.3475 3.0 ------ UNKNOWN
40.6441 -79.2423 3.2 47.0 -53.1 13.0183 3.7 ------ UNKNOWN
238.2894 -46.3711 2.5 48.0 -129.1 18.5003 4.7 ------ UNKNOWN
41.9291 -77.5598 2.1 47.9 -51.2 22.6745 5.5 ------ UNKNOWN
Plot creation:
Sat Feb 8 01:40:16 EST 2020