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The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2019 are given, totaling 2555 measurements of 1972 resolved pairs with separations from 15 mas (median 0.21") and magnitude…

Solar and Stellar Astrophysics · Physics 2021-01-11 Andrei Tokovinin , Brian D. Mason , Rene A. Mendez , Edgardo Costa , Elliott P. Horch

The results of speckle interferometric observations at the 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…

Solar and Stellar Astrophysics · Physics 2015-08-06 Andrei Tokovinin , Brian D. Mason , William I. Hartkopf , Rene A. Mendez , Elliott P. Horch

The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2018 are given, totaling 3097 measurements of 2427 resolved pairs with separations from 11 mas to 5.9" (median 0.15",…

Solar and Stellar Astrophysics · Physics 2019-07-17 Andrei Tokovinin , Brian D. Mason , Rene A. Mendez , Elliott P. Horch , Cesar Briceno

The speckle interferometry program at the the 4.1 m Southern Astrophysical Research Telescope (SOAR), started in 2008, now accumulated over 30,300 individual observations of 12,700 distinct targets. Its main goal is to monitor orbital…

Solar and Stellar Astrophysics · Physics 2022-07-27 Andrei Tokovinin , Brian D. Mason , Rene A. Mendez , Edgardo Costa

The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2020, as well as earlier unpublished data, are given, totaling 1735 measurements of 1288 resolved pairs and non-resolutions…

Solar and Stellar Astrophysics · Physics 2021-07-14 Andrei Tokovinin , Brian D. Mason , Rene A. Mendez , Edgardo Costa , Andrew W. Mann , Todd J. Henry

Results of speckle interferometry observations at the 4.1 m SOuthern Astrophysical Research (SOAR) telescope obtained during 2024-2025 are presented. We present 5316 measurements of relative positions and magnitude differences in 3532 pairs…

Solar and Stellar Astrophysics · Physics 2026-05-05 Andrei Tokovinin , Brian D. Mason , Rene A. Mendez , Edgardo Costa

The results of speckle interferometric observations at the 4.1 m SOAR telescope in 2016 and 2017 are given, totaling 2483 measurements of 1570 resolved pairs and 609 non-resolutions. We describe briefly recent changes in the instrument and…

Solar and Stellar Astrophysics · Physics 2018-05-23 Andrei Tokovinin , Brian D. Mason , William I. Hartkopf , Rene A. Mendez , Elliott P. Horch

Results of speckle observations at the 4.1-m SOAR telescope in 2012 (158 measures of 121 systems, 27 non-resolutions) are reported. The aim is to follow fast orbital motion of recently discovered or neglected close binaries and sub-systems.…

Solar and Stellar Astrophysics · Physics 2015-06-05 Andrei Tokovinin

Results of the speckle-interferometry observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) obtained during 2023 are presented: 1913 measurements of 1533 resolved pairs or subsystems (median separation 0.16") and…

Solar and Stellar Astrophysics · Physics 2024-05-17 Andrei Tokovinin , Brian D. Mason , Rene A. Mendez , Edgardo Costa

We report the results of speckle runs at the 4.1-m Southern Astronomical Research (SOAR) telescope in 2012 and 2013. A total of 586 objects were observed. We give 699 measurements of 487 resolved binaries and upper detection limits for 112…

Solar and Stellar Astrophysics · Physics 2015-06-19 Andrei Tokovinin , Brian D. Mason , William I. Hartkopf

The results of speckle interferometric measurements of binary and multiple stars conducted in 2008 and 2009 at the Blanco and SOAR 4-m telescopes in Chile are presented. A total of 1898 measurements of 1189 resolved pairs or sub-systems and…

Solar and Stellar Astrophysics · Physics 2011-07-21 Andrei Tokovinin , Brian D. Mason , William I. Hartkopf

Since 2007, close binary and multiple stars are observed by speckle interferometry at the 4.1 m Southern Astrophysical Research (SOAR) telescope. The HRCam instrument, observing strategy and planning, data processing and calibration…

Instrumentation and Methods for Astrophysics · Physics 2018-02-21 Andrei Tokovinin

We report results of speckle-interferometric monitoring of visual hierarchical systems using the newly commissioned instrument NESSI at the 3.5-m WIYN telescope. During one year, 390 measurements of 129 resolved subsystems were made, while…

Solar and Stellar Astrophysics · Physics 2019-10-09 Andrei Tokovinin , Mark E. Everett , Elliott P. Horch , Guillermo Torres , David W. Latham

The results of speckle interferometric observations of 104 binary and 6 triple stars performed at the BTA 6 m telescope in 2004 October are presented. Nearby low-mass stars are mostly observed for the program, among which 59 there are new…

We present results from Speckle inteferometric observations of fifteen visual binaries and one double-line spectroscopic binary, carried out with the HRCam Speckle camera of the SOAR 4.1 m telescope. These systems were observed as a part of…

Solar and Stellar Astrophysics · Physics 2021-03-10 Rene A. Mendez , Ruben M. Claveria , Edgardo Costa

We present the results of 938 speckle measures of double stars and suspected double stars drawn mainly from the Hipparcos Catalogue, as well as 208 observations where no companion was noted. One hundred fourteen pairs have been resolved for…

Solar and Stellar Astrophysics · Physics 2015-10-28 Elliott P. Horch , Gerard T. van Belle , James W. Davidson, , Lindsay A. Ciastko , Mark E. Everett , Karen S. Bjorkman

We report 370 measures of 170 components of binary and multiple star systems, obtained from speckle imaging observations made with the Differential Speckle Survey Instrument at Lowell Observatory's Discovery Channel Telescope in 2015…

The orbits of 8 systems with low-mass components (HIP 14524, HIP 16025, HIP 28671, HIP 46199, HIP 47791, HIP 60444, HIP 61100 and HIP 73085) are presented. Speckle interferometric data were obtained at the 6 m Big Alt-azimuth Special…

Solar and Stellar Astrophysics · Physics 2020-05-29 A. Mitrofanova , V. Dyachenko , A. Beskakotov , Yu. Balega , A. Maksimov , D. Rastegaev , S. Komarinsky

We report the results of speckle-interferometric observations of 109 high proper-motion metal-poor stars made with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. We resolve eight objects --…

Astrophysics · Physics 2007-07-20 D. A. Rastegaev , Yu. Yu. Balega , E. V. Malogolovets

The results of speckle interferometric observations of 115 metal-poor stars [m/H]<-1 within 250 pc from the Sun and with proper motions mu <= 0.2"/yr, made with the 6-m telescope of the Special Astrophysical Observatory of the Russian…

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