Paper:	The Long Period Intermediate Polar RXJ1548-4528
Volume:	330, The Astrophysics of Cataclysmic Variables and Related Objects
Page:	401
Authors:	de Martino, D.; Mouchet, M.; Bonnet-Bidaud, J.M.; Haberl, F.; Gansicke, B.T.
Abstract:	Phase-resolved optical spectroscopy of the recently identified Intermediate Polar (IP) RXJ1548−4528 (Haberl et al. 2002) reveals radial velocity variability of emission lines at the 693 s X-ray and photometric period, confirming the identification of the white dwarf (WD) spin period as well as at a 9.87 hr period, which we identify as the orbital period. RXJ1548−4528 is then the fourth longest period IP known so far. The optical spectrum is peculiar with broad absorptions around Balmer emission lines resembling those observed in V709 Cas (Bonnet-Bidaud et al. 2001). Their origin, the WD or disc, remains unclear. An evolved G9−K3 secondary star is detected in the red spectra.

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