Speckle Interferometry at the U.S. Naval Observatory. XV

TL;DR

This paper presents 2433 high-precision double star observations using speckle interferometry at the U.S. Naval Observatory, providing updated measurements over a one-year period to improve binary star data.

Contribution

It reports a large dataset of speckle interferometry measurements, enhancing the accuracy and quantity of double star observations for the specified period.

Findings

Measured separations range from 0.96" to 58.05"

Average of 1013 mean relative positions per system

Over 2000 short-exposure images combined per observation

Abstract

Results of 2433 intensified CCD observations of double stars, made with the 26-inch refractor of the U.S. Naval Observatory are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1013 mean relative positions and range in separation from 0.96" to 58.05", with a mean separation of 13.50". This is the 15th in this series of papers and covers the period 2008 January 3 through 2008 December 21.