VizieR Online Data Catalog: Revised LGGS UBVRI photometry of M31 and M33 stars (Massey+, 2016)

The Local Group Galaxy Survey (LGGS) provides UBVRI plus interference-image photometry of luminous stars in the spiral galaxies M31 and M33, along with those found in seven dwarf systems currently forming massive stars (IC 10, NGC 6822, WLM, Sextans A and B, Pegasus, and Phoenix) with the intent of serving as a starting point for systematic exploration of the stellar content of our nearest neighbors beyond the Magellanic Clouds (MCs; Massey et al. 2006, Cat. J/AJ/131/2478; Massey ey al. 2007, Cat. J/AJ/134/2474; Massey et al. 2007, Cat. J/AJ/133/2393; Massey et al. 2011AJ....141...28M).

All of the observations on which our new spectroscopy is based come from the 6.5m MMT telescope used with the 300 fiber positioner Hectospec. This instrument provides a 1° field-of-view, with a choice of two gratings: (1) a 270 line/mm blazed at 5000Å, which covers the entire visible region (3650-9200Å) at once with a resolution of ~5Å, and (2) a 600 line/mm grating blazed 6000Å, which covers 2300Å at one time at a resolution of ~2Å. The fibers have a diameter of 1.5''. The majority of the new observations reported here were obtained with the higher dispersion grating nominally centered at 4800Å but actually covering 3700-6000Å. Some additional new spectral types are those of the Wolf-Rayet stars (non-WRs) found by Neugent & Massey 2011 (Cat. J/ApJ/733/123) and Neugent et al. 2012 (Cat. J/ApJ/759/11); these data were obtained with the lower-dispersion grating, with details reported in that paper.

The first year of observations were obtained during the Fall of 2009, with nominally three nights assigned (2009B-0149), but poor weather during the semester meant we obtained only four fields in M31 and one field in M33. Each observation consisted of 3*45 minute exposures. The second year (Fall 2010), two nights were nominally assigned (NOAO 2010B-0260), allowing us to observe three additional fields in M33, two with 3*45 minute exposures and one with 3*40 minute exposures.

We list all of the known or suspected Luminous Blue Variables (LBVs) in M31 and M33 in Tables 3 and 4. In Tables 5 and 6, we provide the revised versions of the LGGS UBVRI catalogs of stars in M31 and M33.

(5 data files).