pictures in support of ATel 15093 (Dec 8, 2021)
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pictures in support of ATel 15093 (Dec 8, 2021) |
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| "High ionization conditions finally emerge as Nova Cas 2021 (V1405 Cas) ends the plateau and embraces a steady decline" | |
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Munari U. (INAF Padova), Valisa P., Dallaporta S., and Maitan A. (ANS Collaboration)
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Portion of the latest Echelle spectra of Nova Cas 2021 from ANS Collaboration
Varese 0.84m telescope highlighting the emergence of HeII and Bowen blend,
disappearance of P-Cyg absorptions, and restructuring of Hbeta profile.
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ANS Collaboration BVRI light- and color-curves of Nova Cas 2021.
Different colors/symbols distinguish data collected with different
telescopes. The epochs for the Echelle spectra presented in the
picture above are marked by arrows in the B-band panel. The arrow in
the V-band panel points to the epoch when Nova Cas 2021 was for the
first time seen by the Fermi-LAT satellite to emit in gamma-rays (Buson and
Cheung 2021, ATel #14568).
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