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Table 1:

The known AM CVn systems.
System $P_{\rm orb}$ (s) Type
RX J0806.3+1527 321.52911(2) ultra-short, pulsed X-ray
V407 Vul 569.4 ultra-short, pulsed X-ray
ES Cet 621 high-state
AM CVn 1028.73 high-state
HP Lib 1103 high-state
CR Boo 1471 outbursting
KL Dra 1500 outbursting
V803 Cen 1596 outbursting
SDSS J0926+3642 1699 outbursting
CP Eri 1701 outbursting
2003aw (V406 Hya) 2028 outbursting
2QZ J1427-01 2194 (?) outbursting
SDSS J1240-0159 2242 low-state
GP Com 2794 low-state
CE 315 (V396 Hya) 3906 low-state
SDSS J1411+4812 2760 emission lines
SDSS J1552+3201 3376.3(3) emission lines
SDSS J0129+3842 -- emission lines
SDSS J1208+3550 -- emission lines
SDSS J2047+0008 -- absorption lines
SNF 20060524-042 -- --
Data taken from Bildsten et al. (2006) and references therein, Roelofs et al. (2007b,a), Anderson et al. (2005,2008), and the website of G. Nelemans (

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