BACHES - a compact échelle spectrograph for radial velocity surveys with small telescopes

Abstract

We evaluate a pre-production BACHES échelle spectrograph in terms of its usefulness for radial velocity surveys of binary stars with small telescopes in a remote and autonomous. We use the Solaris-4 observatory located in Casleo, Argentina, that is part of a global network of autonomous observatories as the test-bed for the instrument. The setup is designed in such a way that spectroscopy and photometry can be carried out using the same telescope without the need to mechanically modify the imaging train. We observe single spectroscopic standard stars as well as binary stars up to 9.75 mag. We present results of mechanical tests of the instruments and spectroscopic observations carried out between Nov 26th and Dec 8th 2013. We conclude that BACHES is a very compact and capable spectrograph well suited for remote and autonomous operation. Coupled to a 0.5-m telescope it is capable of obtaining spectra of 10 mag targets with a SNR of 20 for 30-minute exposures. This is a very good result considering the price and size of the instrument. It brings new possibilities to the scientific community and opens a whole new range of research opportunities available to new and existing observatories.

arXiv comment11 pages, 16 figures, 2 tables, accepted for publication in MNRAS

References in corpus (9)

• Accurate masses and radii of normal stars: modern results and applications
• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• Eclipsing binaries in open clusters. II. V453 Cyg in NGC 6871
• The Wide Field Spectrograph (WiFeS): Performance and Data Reduction
• HATSouth: a global network of fully automated identical wide-field telescopes
• Eclipsing binaries in ASAS catalog
• High-resolution spectroscopic follow-up of OGLE planetary transit candidates in the Galactic bulge: two possible Jupiter-mass planets and two blends
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- I. A sample of systems with components' masses between 1 and 2 M${}_{\odot }$
• FIASCO - A new Spectrograph at the University Observatory Jena

Cited by in corpus (3)

• Spectroscopic Survey of Eclipsing Binaries with a Low Cost Échelle Spectrograph -- Scientific Commissioning
• Spectroscopy of Eclipsing Compact Hierarchical Triples I
• Commissioning an Inexpensive Off-the-shelf Spectrograph for Radial-Velocity Studies