Benchmarking the power of amateur observatories for TTV exoplanets detection

Roman V. Baluev, Evgenii N. Sokov, Vakhit Sh Shaidulin, Iraida A. Sokova, H.R.A. Jones, Mikko Tuomi, Guillem Anglada-Escudé, Paul Benni, Carlos A. Colazo, Matias E. Schneiter, Carolina S. Villarreal D'Angelo, Artem Yu Burdanov, Eduardo Fernández-Lajús, Özgür Baştürk, Veli-Pekka Hentunen, Stan Shadick

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)
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Abstract

We perform an analysis of ~80000 photometric measurements for the following 10 stars hosting transiting planets: WASP-2, -4, -5, -52, Kelt-1, CoRoT-2, XO-2, TrES-1, HD 189733, GJ 436. Our analysis includes mainly transit lightcurves from the Exoplanet Transit Database, public photometry from the literature, and some proprietary photometry privately supplied by other authors. Half of these lightcurves were obtained by amateurs. From this photometry we derive 306 transit timing measurements, as well as improved planetary transit parameters. Additionally, for 6 of these 10 stars we present a set of radial velocity measurements obtained from the spectra stored in the HARPS, HARPS-N, and SOPHIE archives using the HARPS-TERRA pipeline. Our analysis of these TTV and RV data did not reveal significant hints of additional orbiting bodies in almost all of the cases. In the WASP-4 case, we found hints of marginally significant TTV signals having amplitude 10-20 sec, although their parameters are model-dependent and uncertain, while radial velocities did not reveal statistically significant Doppler signals.
Original languageEnglish
Pages (from-to)3101-3113
JournalMonthly Notices of the Royal Astronomical Society
Volume450
Issue number3
Early online date9 May 2015
DOIs
Publication statusPublished - 1 Jul 2015

Keywords

  • astro-ph.IM
  • astro-ph.EP

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