Eclipse of the B3V companion and flaring of emission lines in V838 Monocerotis

  title={Eclipse of the B3V companion and flaring of emission lines in V838 Monocerotis},
  author={U. Munari and Romano L. M. Corradi and Arne Anthon Henden and Hripsime Navasardyan and Marica Valentini and Robert Greimel and Pierre Leisy and Thomas Augusteijn and Anlaug Amanda Djupvik and Lars Glowienka and Auni Somero and Ignacio G. de la Rosa and Alexandre Vazdekis and Indrek Kolka and Tiina Liimets},
  journal={Astronomy and Astrophysics},
After four years during which only the spectacular light echo was showing continuous and rapid evolution while the central star was nearly constant, in autumn 2006 V838 Mon began a sequence of events which profoundly altered its spectroscopic and photometric behavior: (a) an eclipse of the B3V companion, characterized by the disappearance and reappearance of the B3V companion from optical spectra, and an eclipse-like lightcurve of ∼70 day duration and ∆B ∼ 1.15 mag, ∆V ∼ 0.55 mag, ∆RC ∼ 0.10… 
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