Improved astrometry for the Bohannan & Epps catalogue

Abstract

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 (BE74) catalogue of H$\alpha$ 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.

3 pages, 1 figure. Accepted in A&A

References in corpus (2)

• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• Emission-line stars discovered in the UKST H-alpha survey of the Large Magellanic Cloud; Part 1: Hot stars

Cited by in corpus (4)

• The VLT-FLAMES Tarantula Survey XVIII. Classifications and radial velocities of the B-type stars
• An investigation of the photometric variability of confirmed and candidate Galactic Be stars using ASAS-3 data
• A-type stars in the Canada-France Imaging Survey II. Tracing the height of the disc at large distances with Blue Stragglers
• Emission-line stars in the LMC: the Armagh survey, and a metacatalogue