OPTICAL-IDENTIFICATION OF THE SUPERSOFT X-RAY SOURCE IE 0035.4-7230 IN THE SMALL MAGELLANIC CLOUD

Authors
ORIO M DELLAVALLE M MASSONE G OGELMANN H
Citation
M. Orio et al., OPTICAL-IDENTIFICATION OF THE SUPERSOFT X-RAY SOURCE IE 0035.4-7230 IN THE SMALL MAGELLANIC CLOUD, Astronomy and astrophysics, 289(1), 1994, pp. 11-14
Citations number
33
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
289
Issue
1
Year of publication
1994
Pages
11 - 14
Database
ISI
SICI code
0004-6361(1994)289:1<11:OOTSXS>2.0.ZU;2-U
Abstract
We report the identification of the optical counterpart of the SMC sup er-soft X-ray source 1E0035.4-7230 with a variable star of magnitude B =19.9-20.2 within the 40'' Einstein error box. The star shows strong U V excess, a hot, blue continuum and weak lines of high ionization. The lines are redshifted by 3-4 angstrom, indicating SMC membership. This object appears similar to CAL 83 and CAL 87 and is probably a binary system hosting an accreting, hydrogen burning white dwarf.