Two ~35 day clocks in Hercules X-1: evidence for neutron star free precession

Publisher: Edp Sciences

E-ISSN: 1432-0746|494|3|1025-1030

ISSN: 0004-6361

Source: Astronomy & Astrophysics, Vol.494, Iss.3, 2009-02, pp. : 1025-1030

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