Institute of Astronomy and national astronomical observatory, Bulgarian academy of sciences

30-cm eye to the chromosphpere

A new solar telescope is about to be established in the solar tower at National Astronomical Observatory Rozhen, Bulgaria (41° 41’51"; N 24° 44’19"; E, 1759 m). The telescope is currently under construction and is expected to receive its first light in 2022. The 30-cm Schmidt-Cassegrain reflector is going to be focused on chromospheric observations.


Main parameters of the telescope
Parameter Value
Aperture D 305 mm
Focal length F 3050 mm
Effective focal length Feff 5000-15000 mm
Field of view 2.5’ × 2.5’ – 10’ × 10’
Spectral range 656.28 nm (Hα)
Spatial resolution 0.5’’
Line-of-sight velocity resolution 0-10 km/s