Spectroscopic confirmation of the optical identification of X-ray sources used to determine accurate positions for the anomalous X-ray pulsars 1E 2259+58.6 and 4U 0142+61
and
A&A, 368 2 (2001) 569-571
Published online: 15 March 2001
DOI: 10.1051/0004-6361:20010023