We have built the historical light curve of the luminous variable GR 290 back to 1901, from old observations of the star found in several archival plates of M 33. These old recordings together with published and new data show that for at least half a century the star was in a low luminosity state, with B ~18. After 1960, five large variability cycles of visual luminosity were recorded. The amplitude of the oscillations was seen increasing towards the 1992-1994 maximum, then decreasing during the last maxima. The recent light curve indicates that the photometric variations have been quite…continua
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Available from the Minor Planet Center.
We present data on 13 post-nova systems. This includes the recovery via
UBVR photometry of the five post-novae X Cir, V2104 Oph, V363 Sgr, V928
Sgr and V1274 Sgr and their spectroscopic confirmation. We provide
accurate coordinates and finding charts for those objects. Additional
first-time or improved spectroscopic data are presented for V356 Aql,
V500 Aql, V604 Aql, V1370 Aql, MT Cen, V693 CrA, V697 Sco and MU Ser.
Investigating the behaviour of a few easily accessible parameters yields
(limited) information on the accretion state and the system inclination.
We predict that X Cir and V697…