VI photometry of Westerlund 1 and 2

We have carried out CCD observations of stars in the region of the open cluster Westerlund 1 through the V and I passbands. The direct images were obtained with the 24-inch...我们针对疏散星团韦斯特伦德1（Westerlund 1）天区的恒星，采用V波段与I波段通带开展了电荷耦合器件（Charge-Coupled Device, CCD）观测。本次直接成像观测由24英寸（...）设备获取。