J/AJ/157/43 WASP-161b, WASP-163b and WASP-170b (Barkaoui+, 2019)
Discovery of three new transiting hot Jupiters: WASP-161 b, WASP-163 b and
WASP-170 b.
Barkaoui K., Burdanov A., Hellier C., Gillon M., Smalley B., Maxted P.F.L.,
Lendl M., Triaud A.H.M.J., Anderson D.R., McCormac J., Jehin E.,
Almleaky Y., Armstrong D.J., Benkhaldoun Z., Bouchy F., Brown D.J.A.,
Cameron A.C., Daassou A., Delrez L., Ducrot E., Foxell E., Murray C.,
Nielsen L.D., Pepe F., Pollacco D., Pozuelos F.J., Queloz D., Segransan D.
Udry S., Thompson S., West R.G.
<Astron. J. 157, 43 (2019)>
=2019AJ....157...43B 2019AJ....157...43B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities ;
Photometry
Keywords: planetary systems- stars: WASP-161, WASP-163 and WASP-170 -
techniques: photometric - techniques: radial velocities -
techniques: spectroscopic
Abstract:
We present the discovery by the WASP-South transit survey of three new
transiting hot Jupiters, WASP-161 b, WASP-163 b and WASP-170 b.
Follow-up radial velocities obtained with the Euler/CORALIE
spectrograph and high-precision transit light curves obtained with the
TRAPPIST-North, TRAPPIST-South, SPECULOOS-South, NITES, and Euler
telescopes have enabled us to determine the masses and radii for
these transiting exoplanets. WASP-161 b completes an orbit around its
V=11.1 F6V-type host star in 5.406 days, and has a mass and radius of
2.5±0.2MJup and 1.14±0.06RJup respectively. WASP-163 b has an
orbital period of 1.609-days, a mass of 1.9±0.2MJup, and a radius
of 1.2±0.1RJup. Its host star is a V=12.5 G8-type dwarf.
WASP-170 b is on a 2.344-days orbit around a G1V-type star of
magnitude V=12.8. It has a mass of 1.7±0.2MJup and a radius of
1.14±0.09RJup. Given their irradiations (∼109erg/s/cm2) and
masses, the three new planets' sizes are in good agreement with
classical structure models of irradiated giant planets.
Description:
WASP-161 and WASP-170 were observed by WASP-South in 2011 and 2012,
while WASP-163 was observed in 2010 and 2012.
TRAPPIST-North observed two partial transits of WASP-161 b in the
Sloan-z0 lter (20 Dec 2017 and 12 Feb 2018), two partial transits and
one full transit of WASP-163 b in the I+z filter (24 Apr, 02 May, and
13 Jun 2017), and three partial transits of WASP-170 b in the I+z (19
Apr 2017 and 11 Jan 2018) and V (17 Feb 2017) filters.
We used the 60cm robotic telescope TRAPPIST-South (TRansiting Planets
and PlanetesImals Small Telescope) at La Silla (Chile) to observe a
partial transit of WASP-161 b in the Sloan-z0 lter on 28 Jan 2016, two
partial transits of WASP-163 b in a broad I +z filter (transmittance
>90% from 750nm to beyond 1m) on 6 Sep 2014 and 5 July 2016, and two
transits (one full + one partial) of WASP-170 b in I+z on 25 Dec 2015
and 26 Feb 2017.
We used the EulerCam camera on the 1.2m Euler-Swiss telescope (La
Silla, Chile) to observe a transit of WASP-163 b on 27 July 2016 in
the RG lter, and also a transit of WASP-170 b on 20 Dec 2016 in the
broad NGTS filter
Two transits of WASP-163 b were observed with the 0.4m NITES robotic
telescope at La Palma (Canary Islands). The rst transit was full and
observed in R-band on 27 June 2016, while the second was only partial
and observed in I-band on 10 July 2016.
One transit of WASP-161 b was observed with Europa, one of the four
telescopes of the SPECULOOS-South facility on 5 Jan 2018 in the
Sloan-z' filter.
Radial velocity (RV) measurements were performed for the three stars
with the CORALIE spectrograph mounted on the 1.2-meter Euler-Swiss
telescope at ESO La Silla Observatory in Chile. We obtained 24
spectroscopic measurements for WASP-161 between December 2014 and
January 2017; 25 spectroscopic measurements for WASP-163 between June
2015 and May 2017; and 20 spectroscopic measurements for WASP-170
between February 2015 and May 2017.
Objects:
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RA (2000) DE Designation(s)
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08 25 21.08 -11 30 03.6 WASP-161 = 2MASS J08252108-1130035
17 06 08.98 -10 24 47.0 WASP-163 = 2MASS J17060901-1024467
09 01 39.93 -20 43 13.6 WASP-170 = 2MASS J09013992-2043133
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 119 3 List of stars (from table 1 of the paper)
photobs.dat 60 18 Summary of photometric observations
(from table 3 of the paper)
w161-rv.dat 40 24 WASP 161 CORALIE radial velocities
w161z1.dat 87 938 WASP-161 2016-01-28 TRAPPIST-South sloan-z' filter
w161z2.dat 87 902 WASP-161 2017-12-20 TRAPPIST-North sloan-z' filter
w161z3.dat 87 1235 WASP-161 2018-01-05 SPECULOOS-Europa sloan-z' filter
w161z4.dat 87 892 WASP-161 2018-02-12 TRAPPIST-North sloan-z' filter
w163-rv.dat 40 25 WASP 163 CORALIE radial velocities
w163z1.dat 87 345 WASP-163 2014-09-06 TRAPPIST-South I+z filter
w163r.dat 35 442 WASP-163 2016-06-27 NITES R filter
w163rg.dat 87 170 WASP-163 2016-07-27 EulerCam RG filter
w163z2.dat 87 602 WASP-163 2016-07-05 TRAPPIST-South I+z filter
w163i.dat 35 388 WASP-163 2016-07-10 NITES I filter
w163z3.dat 87 487 WASP-163 2017-04-24 TRAPPIST-North I+z filter
w163z4.dat 87 213 WASP-163 2017-05-02 TRAPPIST-North I+z filter
w163z5.dat 87 557 WASP-163 2017-06-13 TRAPPIST-North I+z filter
w170-rv.dat 40 20 WASP 170 CORALIE radial velocities
w170z1.dat 87 359 WASP-170 2015-12-25 TRAPPIST-South I+z filter
w170ng.dat 87 207 WASP-170 2016-12-20 EulerCam NGTS filter
w170v.dat 87 239 WASP-170 2017-02-17 TRAPPIST-North Johnson-V filter
w170z2.dat 87 545 WASP-170 2017-02-26 TRAPPIST-South I+z filter
w170z3.dat 87 186 WASP-170 2017-04-19 TRAPPIST-North I+z filter
w170z4.dat 87 315 WASP-170 2018-01-11 TRAPPIST-North I+z filter
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Byte-by-byte Description of file: photobs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Target name
10- 19 A10 "date" Date Date of acquisition
21- 30 A10 --- Tel Telescope
32- 41 A10 --- Filt Filter
43- 46 I4 --- Np Number of data points
48- 49 I2 s Texp Exposure time
51- 60 A10 --- FileName Name of the table with photometry
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name WASP name
10- 25 A16 --- 2MASS 2MASS name
27- 45 I19 --- GaiaDR1 Gaia DR1 number
47- 48 I2 h RAh Right ascension (J2000)
50- 51 I2 min RAm Right ascension (J2000)
53- 57 F5.2 s RAs Right ascension (J2000)
59 A1 --- DE- Declination sign (J2000)
60- 61 I2 deg DEd Declination (J2000)
63- 64 I2 arcmin DEm Declination (J2000)
66- 69 F4.1 arcsec DEs Declination (J2000)
71- 75 F5.2 mag Vmag V magnitude
77- 81 F5.2 mag Jmag J magnitude
83- 91 F9.4 d T0 Epoch (HJD-2450000)
93- 98 F6.4 d e_T0 rms uncertainty on T0
100-109 F10.8 d Per Period
111-119 F9.7 d e_Per rms uncertainty on Per
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Byte-by-byte Description of file: w???-rv.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD UTC observation date (HJD)
15- 23 F9.5 km/s RV Radial velocity
25- 31 F7.5 km/s e_RV Error on RV
33- 40 F8.5 km/s BIS Bisector span
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Byte-by-byte Description of file: w???[zrinv]*.dat
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Bytes Format Units Label Explanations
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1- 15 F15.7 d HJD UTC observation date (HJD)
17- 25 F9.7 --- RFlux Relative flux
27- 35 F9.7 --- e_RFlux Error on RFlux
37- 42 F6.2 pix dX ? Measured offset of the image center relative
to the first image of the run (1)
44- 49 F6.2 pix dY ? Measured offset of the image center relative
to the first image of the run (1)
51- 59 F9.7 --- Airmass ? Airmass (1)
61- 70 F10.7 pix FWHM ? Full-width Half Maximum size (1)
72- 82 F11.7 --- bck ? background level (el) (1)
84- 87 F4.1 s Texp ? Exposure time (1)
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Note (1): Not for NITES observations (w163r.dat and w163i.dat).
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Acknowledgements:
Khalid Barkaoui, khalid.barkaoui(at)edu.uca.ac.ma
(End) Patricia Vannier [CDS] 20-Aug-2018