SPECKLE INTERFEROMETRY AT SOAR IN 2014

Journal Article · Sat Aug 15 00:00:00 EDT 2015 · Astronomical Journal (Online)

DOI:https://doi.org/10.1088/0004-6256/150/2/50· OSTI ID:22520174

Tokovinin, Andrei ^[1]; Mason, Brian D.; Hartkopf, William I. ^[2]; Mendez, Rene A. ^[3]

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1. Cerro Tololo Inter-American Observatory, Casilla 603, La Serena (Chile)
2. U.S. Naval Observatory, 3450 Massachusetts Ave., Washington, DC (United States)
3. Universidad de Chile, Casilla 36-D, Santiago (Chile)

The results of speckle interferometric observations at the Southern Astrophysical Research Telescope (SOAR) telescope in 2014 are given. A total of 1641 observations were taken, yielding 1636 measurements of 1218 resolved binary and multiple stars and 577 non-resolutions of 441 targets. We resolved for the first time 56 pairs, including some nearby astrometric or spectroscopic binaries and ten new subsystems in previously known visual binaries. The calibration of the data is checked by linear fits to the positions of 41 wide binaries observed at SOAR over several seasons. The typical calibration accuracy is 0.°1 in angle and 0.3% in pixel scale, while the measurement errors are on the order of 3 mas. The new data are used here to compute 194 binary star orbits, 148 of which are improvements on previous orbital solutions and 46 are first-time orbits.

• OSTI ID: 22520174
• Journal Information: Astronomical Journal (Online), Vol. 150, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCURACY
ASTROPHYSICS
BINARY STARS
CALIBRATION
ERRORS
INTERFEROMETRY
ORBITS
RESOLUTION
TELESCOPES