AM Cas : Just before a standstill ?

T. Kato reported that during 2001 October, the outburst cycle length and amplitude of AM Cas decreased. This behavior resemble the behavior in some Z Cam stars just before entering standstills. The existence of standstills has not been very clearly demonstrated in AM Cas, SS Cyg-type star with the shortest outburst cycle length (vsnet-campaign 1199). The observations reported in November shows that this unusual state still continued (vsnet-campaign-dn 1868).

An outburst of 13.4mag was reported by E. Muyllaert on December 4. The amplitude may imply that it again entered a low-amplitude phase (vsnet-campaign-dn 1956).

Follow-up monitoring is strongly encouraged.

Other related articles: vsnet-campaign-dn 1798, 1835

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