| Issue |
A&A
Volume 548, December 2012
|
|
|---|---|---|
| Article Number | A16 | |
| Number of page(s) | 2 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/201220250 | |
| Published online | 14 November 2012 | |
Research Note
Improved astrometry for the Bohannan & Epps catalogue ⋆
Dept. of Physics & Astronomy, UCL, Gower St.,
London
WC1E 6BT,
UK
e-mail: idh@star.ucl.ac.uk
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 (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/548/A16
© ESO, 2012
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