Benchmarking the power of amateur observatories for TTV exoplanets detection

BALUEV, ROMAN V.; SOKOV, EVGENII N.; SHAIDULIN, VAKHIT SH.; SOKOVA, IRAIDA A.; JONES, HUGH R. A.; TUOMI, MIKKO; ANGLADA-ESCUDÉ, GUILLEM; BENNI, PAUL; COLAZO, CARLOS; SCHNEITER, MATIAS; VILLARREAL D'ANGELO, CAROLINA S.; BURDANOV, ARTEM YU.; FERNÁNDEZ-LAJÚS, EDUARDO;; BASTÜRK, ÖZGÜR; HENTUNEN, VELI-PEKKA; SHADICK, STAN

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2015

0035-8711

We perform an analysis of ?80 000 photometric measurements for thefollowing 10 stars hosting transiting planets: WASP-2, -4, -5, -52,Kelt-1, CoRoT-2, XO-2, TrES-1, HD 189733, GJ 436. Our analysis includesmainly transit light curves from the Exoplanet Transit Database, publicphotometry from the literature, and some proprietary photometryprivately supplied by other authors. Half of these light curves wereobtained by amateurs. From this photometry we derive 306 transit timingmeasurements, as well as improved planetary transit parameters.Additionally, for 6 of these 10 stars we present a set of radialvelocity measurements obtained from the spectra stored in the HARPS,HARPS-N and SOPHIE archives using the HARPS-TERRA pipeline. Our analysisof these transit timing and radial velocity data did not revealsignificant hints of additional orbiting bodies in almost all of thecases. In the WASP-4 case, we found hints of marginally significant TTVsignals having amplitude 10-20 s, although their parameters are modeldependent and uncertain, while radial velocities did not revealstatistically significant Doppler signals.