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
251.8179 -45.8431 0.0663 1.1 -111.7 0.5225 2.9 TRIG_00808755
------------------------------------------
Foreground time interval of the image:
-114.528 -36.696 (delta_t = 77.832 [sec])
-35.392 7.509 (delta_t = 42.901 [sec])
Background time interval of the image:
-239.392 -114.528 (delta_t = 124.864 [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 0.064000
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 0.064000
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 0.064000
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
Multiple GTIs in the spectrum
tstart tstop
-114.528000 -36.696100
-35.392000 55.168000
56.608000 250.720000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.371400 ( 0.376293 0.376293 )
Norm@50keV : 2.24433E-05 ( -2.23333e-05 6.96484e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.98 using 59 PHA bins.
# Reduced chi-squared = 0.9471 for 57 degrees of freedom
# Null hypothesis probability = 5.889885e-01
Photon flux (15-150 keV) in 362.5 sec: 3.52734E-03 8.75565E-04 ( -0.000935536 0.00959244 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02584e-19 ( -7.59579e-08 3.48009e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-114.528000 -36.696100
-35.392000 55.168000
56.608000 250.720000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.07672 ( 3.07562 3.07562 )
Epeak [keV] : 9999.17 ( -9999.13 -9999.13 )
Norm@50keV : 8.40383E-07 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.83 using 59 PHA bins.
# Reduced chi-squared = 0.9613 for 56 degrees of freedom
# Null hypothesis probability = 5.574374e-01
Photon flux (15-150 keV) in 362.5 sec: 3.74852E-03 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85678e-07 ( -1.85678e-07 2.43134e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-114.528000 -36.696100
-35.392000 55.168000
56.608000 250.720000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.151685 ( 0.1456 0.1456 )
beta : 0.374114 ( -0.378597 -0.378597 )
Epeak [keV] : 15.0792 ( -15.1554 -15.1554 )
Norm@50keV : 4.08995E-05 ( -4.09803e-05 85.55 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.98 using 59 PHA bins.
# Reduced chi-squared = 0.9815 for 55 degrees of freedom
# Null hypothesis probability = 5.135037e-01
Photon flux (15-150 keV) in 362.5 sec: 3.66981 ( 3.33019 -0.50012 ) 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 : 1.79991E-06 (-1.79802e-06 -1.79802e-06)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9476 for 57 degrees of freedom
# Null hypothesis probability = 5.877793e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.766e-09 1.308e-09
25- 50 1.290e-08 9.635e-09
50-150 1.651e-07 1.183e-07
15-150 1.798e-07 1.064e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.349 (-199.356 -199.356)
Norm : 1.60040E-02 (-0.0160476 0.0299765)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.81 using 59 PHA bins.
# Reduced chi-squared = 0.9615 for 57 degrees of freedom
# Null hypothesis probability = 5.577544e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.279e-09 1.373e-11
25- 50 5.889e-11 0.000e+00
50-150 9.367e-16 0.000e+00
15-150 5.337e-09 1.241e-21
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.60598 (-1.55463 -1.55463)
R1^2/D10^2 : 13.4188 (-24.9486 -24.9486)
kT2 [keV] : 198.832 (-198.975 -198.975)
R2^2/D10^2 : 1.78003E-06 (-1.78299e-06 -1.78299e-06)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.06 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9830 for 55 degrees of freedom
# Reduced chi-squared = 0.9807 for 55 degrees of freedom
# Null hypothesis probability = 5.104278e-01
# Null hypothesis probability = 5.152312e-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 249.796 sec. to 250.796 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06901 ( -0.207266 0.219343 )
Norm@50keV : 7.98818E-03 ( -0.0013341 0.00131978 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.33 using 59 PHA bins.
# Reduced chi-squared = 1.620 for 57 degrees of freedom
# Null hypothesis probability = 2.123607e-03
Photon flux (15-150 keV) in 1 sec: 1.23788 ( -0.169353 0.169447 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.39875e-08 ( -1.14676e-08 1.17112e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 249.796 sec. to 250.796 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.45200 ( -1.98029 1.41684 )
Epeak [keV] : 38.6729 ( -4.03889 4.65692 )
Norm@50keV : 0.992423 ( -1.22325 16.7407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.58 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 56 degrees of freedom
# Null hypothesis probability = 1.787143e-01
Photon flux (15-150 keV) in 1 sec: 1.19785 ( -0.16505 0.16614 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.47656e-08 ( -9.3842e-09 9.9385e-09 ) ergs/cm2
Band function
Time interval is from 249.796 sec. to 250.796 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.55175 ( -1.21777 2.74334 )
beta : -10.0000 ( 10 2.30926e-14 )
Epeak [keV] : 38.6105 ( -4.04914 4.63498 )
Norm@50keV : 1.14031 ( -1.14018 16.8016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.56 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 55 degrees of freedom
# Null hypothesis probability = 1.559229e-01
Photon flux (15-150 keV) in 1 sec: 1.20427 ( 5.79573 -0.16317 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.60642e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.93894 (-1.03724 1.1516)
R^2/D10^2 : 0.680438 (-0.241768 0.365714)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.64 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.023139e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.366e-08 2.695e-09
25- 50 3.367e-08 5.130e-09
50-150 1.726e-08 5.815e-09
15-150 6.459e-08 1.084e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.1463 (-13.2334 20.5073)
Norm : 7.16170 (-1.29988 1.59569)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.66 using 59 PHA bins.
# Reduced chi-squared = 1.398 for 57 degrees of freedom
# Null hypothesis probability = 2.539422e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.774e-08 2.950e-09
25- 50 2.603e-08 4.720e-09
50-150 2.674e-08 9.585e-09
15-150 7.051e-08 1.397e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.81002 (-7.67593 -7.67593)
R1^2/D10^2 : 0.260910 (-0.236 -0.236)
kT2 [keV] : 10.3494 (-10.2813 -10.2813)
R2^2/D10^2 : 0.499460 (-0.534404 -0.534404)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.63 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Null hypothesis probability = 1.545772e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.384e-08 8.650e-06
25- 50 3.346e-08 7.635e-05
50-150 1.769e-08 1.714e-03
15-150 6.500e-08 1.631e-03
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: 2.25335 ( -0.797913 1.01821 )
Norm@50keV : 1.77659E-04 ( -0.000110022 0.000110363 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.92 using 59 PHA bins.
# Reduced chi-squared = 0.8758 for 57 degrees of freedom
# Null hypothesis probability = 7.355696e-01
Photon flux (15-150 keV) in 120.7 sec: 3.02620E-02 ( -0.0133848 0.0133862 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03301e-07 ( -1.03021e-07 1.16464e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.989142 ( )
Epeak [keV] : 30.2785 ( )
Norm@50keV : 2.46120E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.63 using 59 PHA bins.
# Reduced chi-squared = 0.8683 for 56 degrees of freedom
# Null hypothesis probability = 7.473137e-01
Photon flux (15-150 keV) in 120.7 sec: 2.80979E-02 ( -0.0134219 0.0133246 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55806e-07 ( -7.23355e-08 1.28339e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.56728 ( -4.56728 -4.56728 )
beta : -4.32405 ( 4.32405 3.55718 )
Epeak [keV] : 30.2852 ( -30.2852 10.1049 )
Norm@50keV : 6.21591 ( -2.61471 654988 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.46 using 59 PHA bins.
# Reduced chi-squared = 0.8811 for 55 degrees of freedom
# Null hypothesis probability = 7.210238e-01
Photon flux (15-150 keV) in 120.7 sec: 3.66981 ( 3.33019 -0.50012 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.70618e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.10e-08
S(50-100 keV) = 5.72e-081.56e-08
T90 vs. Hardness ratio plot
T90 = 365.248000025749 sec.
Hardness ratio (energy fluence ratio) = 5.2e-73
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = -0.895537
Count Ratio (50-100 keV) / (15-25 keV) = -1.35934
Mask shadow pattern
IMX = -6.944363851085014E-03, IMY = 1.741800003694403E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.392000 -114.528000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4069 -60.7524 22.2 46.4 46.8 0.3811 0.5 8.2 Cen X-3
186.7772 -62.6130 4.2 38.4 46.7 0.9299 2.8 10.0 GX 301-2
244.9779 -15.6448 0.3 31.0 174.9 7.8276 40.0 0.3 Sco X-1
256.0011 -37.8276 0.7 9.5 -147.1 2.4581 16.2 1.2 4U 1700-377
256.5111 -36.4801 4.8 10.8 -148.0 0.3736 2.4 5.0 GX 349+2
263.1717 -24.7502 5.3 23.9 -145.2 0.3943 2.2 8.9 GX 1+4
265.0008 -44.5523 0.0 10.4 -89.5 0.1518 0.9 12.6 4U 1735-44
268.5010 -1.4687 8.6 47.6 -150.0 -0.5692 -1.3 8.0 SW J1753.5-0127
270.2240 -25.0784 36.2 26.5 -131.4 0.0649 0.3 3.3 GX 5-1
270.3612 -25.7584 5.2 26.0 -130.4 0.4406 2.2 3.3 GRS 1758-258
274.0129 -14.0881 4.4 37.8 -135.6 0.8244 2.6 3.1 GX 17+2
275.9182 -30.2398 7.3 25.5 -115.1 0.3692 1.6 7.6 H1820-303
284.9830 -24.8119 11.6 34.9 -110.9 0.3495 1.0 7.1 HT1900.1-2455
262.7929 -33.7921 7.4 15.7 -133.7 0.2631 1.6 10.1 GX 354-0
252.5339 -87.9820 2.7 41.6 5.0 1.0940 4.3 ------ UNKNOWN
271.1522 -49.8611 3.5 14.2 -63.0 0.5695 3.3 ------ UNKNOWN
295.7645 -25.9627 4.3 41.1 -98.5 2.2349 2.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-114.528000 -36.696100
-35.392000 7.508600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2673 -60.8035 13.6 46.5 46.7 -0.6930 -0.8 10.9 Cen X-3
186.2844 -62.7561 0.0 38.7 46.4 0.5635 1.6 10.3 GX 301-2
244.8467 -15.6826 7.0 31.0 174.6 -0.3726 -1.6 8.1 Sco X-1
255.8185 -37.9551 3.7 9.3 -147.6 0.5293 3.1 10.4 4U 1700-377
256.6447 -36.5294 6.1 10.8 -147.4 -0.3198 -1.9 11.9 GX 349+2
262.9754 -24.7445 5.0 23.8 -145.6 0.4378 2.3 1.8 GX 1+4
264.7186 -44.3017 5.1 10.2 -91.2 0.4156 2.3 9.0 4U 1735-44
268.4899 -1.5455 206.1 47.5 -150.0 0.0258 0.1 9.2 SW J1753.5-0127
270.3922 -25.0196 14.0 26.6 -131.2 -0.1886 -0.8 6.9 GX 5-1
270.3928 -25.8593 4.9 25.9 -130.2 -0.5272 -2.3 8.5 GRS 1758-258
274.1927 -14.1095 5.0 37.9 -135.4 0.6897 2.3 11.7 GX 17+2
275.7071 -30.2852 7.5 25.3 -115.3 -0.3562 -1.5 12.3 H1820-303
284.9167 -24.9258 6.2 34.8 -110.8 -0.6842 -1.9 6.5 HT1900.1-2455
262.9971 -33.8311 362.3 15.7 -133.1 0.0060 0.0 0.5 GX 354-0
180.5991 -68.0177 2.2 40.5 37.9 1.8260 5.3 ------ UNKNOWN
231.2528 2.2655 2.8 51.5 160.3 2.9222 4.2 ------ UNKNOWN
134.4537 -77.0022 2.9 50.4 20.3 2.4773 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
21.408590 55.168000
56.608000 408.208000
409.608000 962.679100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4572 -60.5529 4.5 47.4 46.2 9.3747 2.6 5.9 Cen X-3
186.7773 -62.6751 5.3 39.4 45.9 3.7778 2.2 6.6 GX 301-2
244.9719 -15.6496 0.2 30.7 172.1 59.6460 55.9 0.7 Sco X-1
255.9970 -37.8430 0.8 8.6 -152.1 11.5437 13.7 0.5 4U 1700-377
256.3635 -36.4217 5.1 10.1 -153.3 1.7982 2.3 3.5 GX 349+2
263.0644 -24.7914 5.4 22.9 -147.9 1.9049 2.1 4.1 GX 1+4
264.9309 -44.3692 9.9 9.4 -89.5 -0.9055 -1.2 9.4 4U 1735-44
268.3657 -1.4547 22.6 46.7 -152.0 0.9921 0.5 0.2 SW J1753.5-0127
270.4299 -25.0221 14.2 25.7 -133.0 0.8106 0.8 8.6 GX 5-1
270.1662 -25.7466 6.1 24.9 -132.6 1.8434 1.9 7.4 GRS 1758-258
273.8908 -14.0744 3.7 36.8 -137.5 4.5724 3.2 7.1 GX 17+2
275.9777 -30.2340 7.1 24.5 -116.3 1.7559 1.6 8.4 H1820-303
285.2171 -24.9157 9.6 34.0 -111.6 1.8207 1.2 9.9 HT1900.1-2455
262.7747 -33.7193 0.0 14.8 -136.5 0.1025 0.1 12.7 GX 354-0
265.9401 -29.7870 1.9 19.5 -135.6 5.4586 6.0 ------ UNKNOWN
343.7821 -66.4224 2.7 49.6 -26.7 8.1983 4.3 ------ UNKNOWN
333.6572 -54.9286 3.8 49.9 -43.1 12.6772 3.0 ------ UNKNOWN
Plot creation:
Tue Feb 6 19:35:35 EST 2018