Symbiotic stars on Asiago archive plates. II

Details Symbiotic stars on Asiago archive plates. II Symbiotic stars on Asiago archive plates. II

2002-02-06

arxiv.org/abs/astro-ph/0202118v1

Astronomy and Astrophysics

Astrophysics

A&A, in press

Scientific paper

10.1051/0004-6361:20020201

The Asiago photographic archive has been searched for plates containing the symbiotic stars Hen 2-468, QW Sge, LT Del, V407 Cyg, K 3-9, V335 Vul, FG Ser and Draco C-1. A total of 635 plates imaging the program stars have been found and the brightness estimated using the Henden & Munari (2000) UBVRI photometric sequences. These historical data have allowed for the first time the determination of the orbital periods of Hen 2-468 (774 days) and QW Sge (390.5 days), a significant improvement in the orbital period of LT Del (465.6 days) and for V407 Cyg an evaluation of the Mira's pulsation period and complex lightcurve shape in the red (R and I bands). Some previously unknown outbursts have been discovered too. (Paper I: Munari et al. 2001, A&A 370, 503)

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