Symbiotic stars on Asiago archive plates*
Osservatorio Astronomico di Padova, Sede di Asiago, 36012 Asiago (VI), Italy
2 Physics Department, University of Rijeka, Omladinska 14, HR-51000 Rijeka, Croatia
Corresponding author: U. Munari, firstname.lastname@example.org
Accepted: 14 February 2001
The rich plate archive of the Asiago observatory has been searched for plates containing the symbiotic stars AS 323, Ap 3-1, CM Aql, V1413 Aql (= AS 338), V443 Her, V627 Cas (= AS 501) and V919 Sgr. The program objects were found on 602 plates, where their brightness has been estimated against the photometric sequences calibrated by Henden & Munari (2000). AS 323 is probably eclipsing, with a preliminary day period. If confirmed, it would be the shortest orbital period known among symbiotic stars. CM Aql does not seem to undergo a series of outbursts, its lightcurve being instead modulated by a large amplitude sinusoidal variation with a day period. V627 Cas presents a secular trend, in agreement with the possible post-AGB nature of its cool component.
Key words: binaries: symbiotic
© ESO, 2001