Improved astrometry for the Bohannan & Epps catalogue ⋆
Dept. of Physics & Astronomy, UCL, Gower St.,
Received: 17 August 2012
Accepted: 5 October 2012
Aims. Accurate astrometry is required to reliably cross-match 20th-century catalogues against 21st-century surveys. The present work aims to provide such astrometry for the 625 entries of the Bohannan & Epps (1974, A&AS, 18, 47; BE74) catalogue of Hα emission-line stars.
Methods. BE74 targets have been individually identified in digital images and, in most cases, unambiguously matched to entries in the UCAC4 astrometric catalogue.
Results. Sub-arcsecond astrometry is now available for almost all BE74 stars. Several identification errors in the literature illustrate the perils of relying solely on positional coincidences using poorer-quality astrometry.
Key words: astrometry / stars: emission-line, Be / magellanic clouds
Tables 1–3 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (18.104.22.168) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/548/A16
© ESO, 2012