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Together with other professionals mainly from USA and Russia, we are trying to recover historical lightcurves of symbiotic stars from archive plate spectra. The 1890-1996 one for YY Her is in press in Astron.Astrophys. One of the objects we are working on is AS 360 = QW Sge.
RA (1950) = 19 43 36.7 (2000) = 19 45 49.3
DEC (1950) = +18 29 23 +18 36 45
The object in quiescence is recorded at B (or m_pg) = 13.2
We are interested in B or m_pg plates of AS 360 secured during these time intervals
1904-1908
1915-1916
1920-1922
1947-1949
1954-1960
where our 1890-1997 lightcurve is still affected by nearly empty gaps. Succesfully located plates could be eye-estimated at a microscope against the comparison sequence that we will fax. Even a single plate in the listed intervals would be of great interest because it can trace prolonged quiescence intervals or reveal an unknown outburst episode.
Please address messages to: munari@astras.pd.astro.it
Thank you very much !
Ulisse Munari, Padova-Asiago Astronomical Observatories
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