Optimized beam-combination schemes for each channel for PRIMA

Rudolf S. Le Poole; Andreas Quirrenbach

doi:10.1117/12.459972

21 February 2003 Optimized beam-combination schemes for each channel for PRIMA

Proceedings Volume 4838, Interferometry for Optical Astronomy II; (2003) https://doi.org/10.1117/12.459972
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

With the imaging and astrometric facilities coming up as the next major leaps forward in interferometry at the VLT we examine options for beam combination of multiple beams, both in the Science Channel and in the Reference Channel. We look at the science we expect to become feasible as soon as phase referencing becomes available, and the hopes for the future of this facility with the advent of more ATs and next-generation beam combiners. Contrary to "conventional wisdom," the fringe tracking accuracy for a multi-element array is not worse than for a single-baseline interferometer with equal telescope size. We discuss applications of phase referencing to observations of faint targets, and a double-differential phase technique for spectroscopy of extrasolar planets. We point out that phase-referenced methods have some important advantages compared with the closure-phase technique for imaging of extended sources.

Citation Download Citation

Rudolf S. Le Poole and Andreas Quirrenbach "Optimized beam-combination schemes for each channel for PRIMA", Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); https://doi.org/10.1117/12.459972

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available