2013MNRAS.431..966T

Query : 2013MNRAS.431..966T

2013MNRAS.431..966T - Mon. Not. R. Astron. Soc., 431, 966-971 (2013/May-1)

An extremely high photometric precision in ground-based observations of two transits in the WASP-50 planetary system.

TREGLOAN-REED J. and SOUTHWORTH J.

Abstract (from CDS):

We present photometric observations of two transits in the WASP-50 planetary system, obtained using the ESO New Technology Telescope and the defocused-photometry technique. The rms scatters for the two data sets are 258 and 211 ppm with a cadence of 170-200 s, setting a new record for ground-based photometric observations of a point source. The data were modelled and fitted using the prism and gemc codes, and the physical properties of the system calculated. We find the mass and radius of the hot star to be 0.861±0.057M☉ and 0.855±0.019R☉, respectively. For the planet we find a mass of 1.437 ± 0.068MJup, a radius of 1.138±0.026RJup and a density of 0.911±0.033ρJup. These values are consistent with but more precise than those found in the literature. We also obtain a new orbital ephemeris for the system: T0 = BJD/TDB 245 5558.612 37 (20) +1.9550938(13)xE.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): techniques: photometric - stars: fundamental parameters - stars: individual: WASP-50 - planetary systems

VizieR on-line data: <Available at CDS (J/MNRAS/431/966): wasp50.dat>

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 WASP-50b Pl 02 54 45.1341750384 -10 53 53.025224640           ~ 46 1
2 WASP-50 * 02 54 45.1341750384 -10 53 53.025224640   12.43 11.44 11.599   G9V 62 1
3 TYC 5290-448-1 * 02 54 49.3900043784 -10 51 54.931275432   12.31 11.41     ~ 1 0
4 CoRoT-1 * 06 48 19.1723766840 -03 06 07.710745140     13.6 13.44 12.88 G0V 142 2
5 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
6 WASP-19 * 09 53 40.0765648584 -45 39 33.057187596   13.05 12.31 12.12 11.35 G8V 207 2
7 OGLE-TR 56 SB* 17 56 35.5016678064 -29 32 21.479240220     16.560 16.07 15.30 ~ 174 1
8 Kepler-1 Em* 19 07 14.0375836512 +49 18 59.091482160   11.85 11.25     G0V 195 2
9 WASP-2 V* 20 30 54.1282355304 +06 25 46.341284844   13 11.98     K1.5 157 1
10 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1193 1
11 * 51 Peg PM* 22 57 27.9804852576 +20 46 07.797040104 6.39 6.16 5.46 4.97 4.61 G2IV 1216 1
12 WASP-10 V* 23 15 58.3006181424 +31 27 46.296056268   12.4   12.03   K5V 100 1
13 WASP-4 PM* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 196 1
14 WASP-5 * 23 57 23.7564672192 -41 16 37.743700800   12.808 12.146 12.058 11.44 G4V 132 1

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