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.
@article{arxiv.1501.06748,
title = {Benchmarking the power of amateur observatories for TTV exoplanets detection},
author = {Roman V. Baluev and Evgenii N. Sokov and Vakhit Sh. Shaidulin and Iraida A. Sokova and Hugh R. A. Jones and Mikko Tuomi and Guillem Anglada-Escudé and Paul Benni and Carlos A. Colazo and Matias E. Schneiter and Carolina S. Villarreal D'Angelo and Artem Yu. Burdanov and Eduardo Fernández-Lajús and Özgür Baştürk and Veli-Pekka Hentunen and Stan Shadick},
journal= {arXiv preprint arXiv:1501.06748},
year = {2015}
}
Comments
16 pages, 6 figures, 4 tables; Accepted for publication in MNRAS