ESPRIF

Echelle Spectrograph at the Primary Focus

The ESPriF echelle spectrograph is designed for observing stellar-like objects at the primary focus of the 6-m telescope BTA within the wavelength range of ~ 3800 Å to ~ 10800 Å. It achieves a spectral resolution R ranging from 15,000 to 30,000 , operating in both standard spectroscopy and spectropolarimetry modes. The spectrograph equiped with a CCD camera developed by the Advanced Design Laboratory of SAO RAS. achieves S/N ratio ~ 100 in 1 hour exposure in ideal weather conditions (clear sky, seeing better than 1.5”) for a star of V= 14.0 mag. At the detection limit (S/N= 10 per 1 hour), objects as faint as V= 19.0 mag are accessible. Location Longitude: 41°26'30" Latitude: +43°39'12" Altitude: 2070 m Publications based on data obtained with the aid of ESPriF should quote the following reference paper: Panchuk V.E., Klochkova V.G., Yushkin M.V., et al. 2020, INASAN Science Reports 5 (6), 361.

How to apply

Telescope time with 6-m telescope (and other telescopes) at Special Astrophysical Observatory is allocated twice a year. Applications for observing time must be submitted using the web-based interface accessible at the link given below. As a rule, applications for the first half of the following year are accepted from August 1 to September 10 of the current year and, from February 1 to March 10, applications for the second half of the year are accepted.