VizieR Online Data Catalog: Keck/NIRC2 obs. of the Galactic Center (Sakai+, 2019)

Maser stars that are detected in both the IR and radio are used to bring the IR stellar positions into an Sgr A* (radio) rest frame. Reid+ (2007ApJ...659..378R) presented radio data of masers that were based on five epochs of observations over the period of 1995-2006. In this paper, we use radio positions and proper motions from M. Reid (2018, private communication) that have been updated with two additional epochs of observations.

All the data for the IR observations of SiO masers in the Galactic Center region were obtained using the laser guide-star adaptive optics (LGSAO) facility on the Keck II telescope at the W. M. Keck Observatory. Images were obtained with a near-infrared facility imager (NIRC2; PI: K. Matthews) through the K' (λ₀=2.12um, Δλ=0.35um) bandpass between 2005 June 30 and 2017 May 5.

(1 data file).