Methods Of Photoelectric Astrometry

Laurence W. Fredrick; Charles D. Smith

doi:10.1117/12.933487

16 November 1982 Methods Of Photoelectric Astrometry

Laurence W. Fredrick, Charles D. Smith

Proceedings Volume 0331, Instrumentation in Astronomy IV; (1982) https://doi.org/10.1117/12.933487
Event: 1982 Astronomy Conferences, 1982, Tucson, United States

Abstract

The idea of a photoelectric technique applied to differential astrometry has been around for about a decade. When developed such instruments promise increased accuracy and speed. Using linear detectors they can determine relative magnitudes and colors of all stars in the field at the same time that the relative positions are measured. Three such instruments have been proposed and have been developed to various degrees. These instruments and several variants will be reviewed. The current status of one instrument employing a rotating Ronchi linear grid, called the AMAS, will be discussed in detail. An accuracy of 5 μm in position is achieved routinely and proposed improvements project an improvement of a factor of ten to 0.5 μm. At this point the accuracy will be "seeing" limited and further improvement will be at the expense of observing time. The present instrument is sky limited at a magnitude of 11.5(V). A very minor change will increase this limit to 15.5(V) using two minute integration periods.

Citation Download Citation

Laurence W. Fredrick and Charles D. Smith "Methods Of Photoelectric Astrometry", Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); https://doi.org/10.1117/12.933487

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