[vsnet-chat 138] help wanted. archive plates of AS 360 = QW Sge

[munari@astras.pd.astro.it (FAX +39 424 600023, TEL. 600033)]

Hallo.

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

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp