Ondrejov Echelle Spectrograph, Ground Based Support Facility for Exoplanet Missions

0534146 - ASÚ 2021 RIV US eng J - Journal Article
Kabáth, Petr - Skarka, Marek - Sabotta, S. - Guenther, E. - Jones, D. - Klocová, Tereza - Šubjak, Ján - Žák, Jiří - Špokova, M. - Blažek, Martin - Dvořáková, J. - Dupkala, Daniel - Fuchs, Jan - Hatzes, A. - Kortusová, Eva - Novotný, R. - Plávalová, E. - Řezba, Luděk - Sloup, Jan - Škoda, Petr - Šlechta, Miroslav
Ondrejov Echelle Spectrograph, Ground Based Support Facility for Exoplanet Missions.
Publications of the Astronomical Society of the Pacific. Roč. 132, č. 1009 (2020), č. článku 035002. ISSN 0004-6280. E-ISSN 1538-3873
R&D Projects: GA ČR(CZ) GC17-01752J
Institutional support: RVO:67985815
Keywords : spectroscopic binaries * radial-velocities * planet candidates
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.445, year: 2020
Method of publishing: Limited access
https://doi.org/10.1088/1538-3873/ab6752

Fulfilling the goals of space-based exoplanetary transit surveys, like Kepler and TESS, is impossible without ground-based spectroscopic follow-up. In particular, the first-step vetting of candidates could easily necessitate several hundreds of hours of telescope time-an area where 2 m class telescopes can play a crucial role. Here, we describe the results from the science verification of the Ondrejov Echelle Spectrograph (OES) installed on the 2 m Perek telescope. We discuss the performance of the instrument as well as its suitability for the study of exoplanetary candidates from space-based transit surveys. In spite of being located at an average European observing site, and originally being conceived for the study of variable stars, OES can prove to be an important instrument for the exoplanetary community in the TESS and PLATO era-reaching accuracies of a few tens of m s(-1) with reasonable sampling and signal-to-noise for sources down to V similar to 13. The stability of OES is demonstrated via long-term monitoring of the standard star HD 109358, while its validity for exoplanetary candidate verification is shown using three K2 candidates EPIC 210925707, EPIC 206135267 and EPIC 211993818, to reveal that they are false positive detections.
Permanent Link: http://hdl.handle.net/11104/0312379