VizieR Online Data Catalog: Interferometric & AO imaging data of α Oph (Gardner+, 2021)

We obtained two previously unpublished epochs of α Oph near periastron in 2012 using the high angular resolution of the Michigan Infra-Red Combiner (MIRC). MIRC is a H-band combiner of six 1m telescopes at the Georgia State University Center for High Angular Resolution Astronomy (CHARA) Array. The CHARA Array is an optical/near-IR interferometer with baselines up to 330m. The α Oph system was observed with the Keck II adaptive optics system and the facility AO imager NIRC2 in six previously unpublished epochs obtained between 2002 March 27 and 2014 June 10. Results from the two MIRC epochs, along with the rest of the astrometry data, are presented in Table 1.

Between 2011 and 2020 we obtained 145 new radial velocity (RV) data points for the primary component of α Oph and 107 RVs for the secondary. This period covers two periastron passages of α Oph. These data were taken with the Tennessee State University 2m Automated Spectroscopic Telescope (AST) and its echelle spectrograph at the Fairborn Observatory in southeast Arizona. The spectra have a resolution of 0.24Å, corresponding to a resolving power of 25000 at 6000Å, and cover a wavelength range from 3800 to 8260Å.

(2 data files).