GIANO is an high resolution cross-dispersed spectrometer operating at near IR wavelengths (0.9-2.5 microns). One of its primary aims is to measure radial velocities of cool stars with an accuracy of a few m/sec. To this purpose, the spectrometer requires a gas absorption cell which should ideally produce several hundreds of measurable lines distributed over the whole wavelengths range. We show that this can be conveniently achieved using a combination of halogen hydrates, namely HCl, HBr and HI. We present and discuss the design and development of such a cell.

Date Published: 28 June 2006
PDF: 5 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62695E (28 June 2006); doi: 10.1117/12.670375

Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)