StarEx spectra of RS Oph for the 10-11 August from Antibes. StarEx is the stellar version of the low cost SolEx instrument dedicated to the solar observation (a 3D printing setup !).
The spectrograph is on a 200-mm Newton telescope working at f/5.
The Halpha region at R=1700 (600 lines/mm grating version) :
The UV region at R=1350 (by rotating the grating knob):
The reasonable UV limit wavelength is here 3640 A.
We can note that StarEx is capable of fine astrophysics despite a low cost. Some examples for same spectral region, Vega:
Deneb:
gamma Cyg:
StarEx during session test at OHP observatory last week:
Christian Buil
(SolEx project:
http://www.astrosurf.com/solex/)