VizieR Online Data Catalog: Swift UVOT Stars Survey. III. Galactic open clusters (Siegel+, 2019)

The UVOT is a modified Richey-Chretien 30 cm telescope that has a wide (17'x17') field of view and a microchannel plate intensified CCD operating in photon-counting mode (see details in Roming et al. 2000SPIE.4140...76R, 2004SPIE.5165..262R, 2005SSRv..120...95R) on board the Neil Gehrels Swift Gamma Ray Burst Mission (Gehrels et al. 2004ApJ...611.1005G). The instrument is equipped with a filter wheel that includes a clear white filter; u, b, and v optical filters; uvw1, uvm2, and uvw2 UV filters; a magnifier; two grisms; and a blocked filter. Although its primary mission is to measure the optical/UV afterglows of gamma-ray bursts, the wide field, 2.3" resolution, broad wavelength range (1700-8000 Å), and ability to observe simultaneously with Swift's X-ray Telescope (Burrows et al. 2005SSRv..120..165B) allow a broad range of science, including the study of hot or highly energetic stars. We have included clusters in the sample if they were observed for at least 0.8 ks in two of UVOT's three NUV filters and where the field center was within 5' of the nominal cluster center, although some exceptions have been made to expand the sample.

(2 data files).