Contact for Spectroscopy:
We recorded our first astronomical spectra in 1997 on comet Hale Bopp with a
spectrometer installed in a wood box at the focus of the 0.6m telescope. The
detector was B/W film and we had success only because of the exceptional
luminosity of this comet.
is atop mount
Campo dei Fiori (1226m), 8 Km North of Varese (Italy) and was built in 1964
by Salvatore Furia. Since then it is
mainly devoted to popular astronomy. Two research groups are active in
(mainly comets and NEO - MPC204 our code) and spectroscopy.
An Echelle Spectrograph
is installed at Cassegrain F20 focus of the 0.6m reflector. It has been completely designed and
built by Paolo Valisa and took first light on sept 2008. It is equipped with a 2192x1472 SBIG XME
CCD Camera. Echelle grating is an R2 79 lines/mm and with 100mm camera lens gives 0.15 (bin 1) or
0.3 (bin 2) A/pixel dispersion at Halfa. Cross disperser is a 300 l/mm transmission grating
and from order 57 to order 26 covers the 3900-8600 range. Spectral resolution is usually 12'000
(with 2.5 arcsec slit) but can attain 18'000 for bright sources (1 arcsec slit). Radial velocity
measurements routinely attain 1 Km/sec precision with a RMS error of 0.7 Km/sec.