{ "id": "astro-ph/9610239", "version": "v1", "published": "1996-10-29T18:20:23.000Z", "updated": "1996-10-29T18:20:23.000Z", "title": "ROSAT observations of A0538--66 during quiescence", "authors": [ "Sergio Campana" ], "comment": "5 pages + 1 figure, LaTex, Springer-Verlag's A&A macro package + s_tables macro (included). Accepted for publication in A&A Main Journal", "categories": [ "astro-ph" ], "abstract": "We discuss serendipitous ROSAT observations of the Be transient A0538-66, which contains the fastest known accreting X-ray pulsar (69 ms). We show that this transient is detected several times during quiescence at a level of about 10^34-35 erg/s. Considering this low luminosity it is more likely that X-rays are produced by matter falling onto the neutron star magnetosphere, rather than onto the star surface. This could be the first example of an X-ray source in the \"propeller regime\".", "revisions": [ { "version": "v1", "updated": "1996-10-29T18:20:23.000Z" } ], "analyses": { "keywords": [ "quiescence", "neutron star magnetosphere", "x-ray source", "first example", "star surface" ], "tags": [ "research tool" ], "note": { "typesetting": "LaTeX", "pages": 5, "language": "en", "license": "arXiv", "status": "editable", "inspire": 436832 } } }