Bootstrapping the NPOI: keeping long baselines in phase by tracking fringes on short baselines

J. Thomas Armstrong; David Mozurkewich; Thomas A. Pauls; Arsen R. Hajian

doi:10.1117/12.317111

24 July 1998 Bootstrapping the NPOI: keeping long baselines in phase by tracking fringes on short baselines

J. Thomas Armstrong, David Mozurkewich, Thomas A. Pauls, Arsen R. Hajian

Proceedings Volume 3350, Astronomical Interferometry; (1998) https://doi.org/10.1117/12.317111
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

The high-spatial-frequency fringes that contain detailed information about a stellar image are generally too weak to track. The Navy Prototype Optical Interferometer (NPOI) is the first interferometer to measure these fringes with the techniques of phase bootstrapping - the use of fringe tracking on two short baselines AB and BC to keep a longer baseline AC phased up - and wavelength bootstrapping - the use of fringe tracking at long wavelengths to keep the long baseline phased up at short wavelengths. We demonstrate the utility of phase and wavelength bootstrapping with the NPOI observations of stellar limb darkening of (beta) Cancri of Pauls et al. in these proceedings. The NPOI baselines and wavelength coverage were 19, 22, and 38 m and (lambda) 450 to (lambda) 850 nm. For (lambda) < 675 nm, the 37 m baseline samples the uv plane beyond the first null of the Airy disk.

Citation Download Citation

J. Thomas Armstrong, David Mozurkewich, Thomas A. Pauls, and Arsen R. Hajian "Bootstrapping the NPOI: keeping long baselines in phase by tracking fringes on short baselines", Proc. SPIE 3350, Astronomical Interferometry, (24 July 1998); https://doi.org/10.1117/12.317111

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