Optical observations of the fast nova V2491 Cyg

Astronomy and Astrophysics – Astronomy

Scientific paper

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Optical, Binaries, Cataclysmic Variables, Novae, Stars

Scientific paper

We report on optical spectral observations and UBVRI brightness estimations obtained with 60/90 cm Schmidt and 60 cm Cassegrain telescopes of the Nicolaus Copernicus University Observatory (Torun, Poland). The nova V2491 Cyg was discovered on Apr. 10.728 UT with about 7.7 mag on unfiltered CCD frames (IAUC#8934). Additionally, the X-ray emission was detected for the prenova several months ago (ATel#1473).

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