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Nova Populations
Massimo Della Valle
In this article we review the current status of the stellar population assignment for novae. Observations in the Milky Way and in external galaxies point out the existence of two n…
Rebirth of Novae as Distance Indicators Due to Efficient Large Telescopes
Massimo Della Valle, Roberto Gilmozzi
Nova outbursts are the result of strong thermonuclear runaways on the surface of a white dwarf accreting Hydrogen-rich material from a small mass companion. These giant explosions…
Exceptionally Bright Type Ib Supernova 1991D
S. Benetti, D. Branch, M. Turatto +5
Photometric and spectroscopic observations of the peculiar Type Ib Supernova 1991D are presented. SN 1991D was exceptionally bright for a Type Ib supernova. The He I lines were rat…
First optical identification of a suprsoft X-ray source in M31
P. Nedialkov, M. Orio, K. Birkle +5
We propose the first association of an optical counterpart with a luminous supersoft X-ray source in M31, RX J0044.0+4118, observed with ROSAT in July 1991. The PSPC position is at…
Discovery of two infrared supernovae: a new window on the SN search
R. Maiolino, L. Vanzi, F. Mannucci +3
We report the discovery of two supernovae (SN 1999gw and SN 2001db) obtained within the framework of an infrared monitoring campaign of Luminous Infrared Galaxies, aimed at detecti…
On Core Collapse Supernovae in Normal and in Seyfert Galaxies
A. Bressan, M. Della Valle, P. Marziani
This paper estimates the relative frequency of different types of core-collapse supernovae, in terms of the ratio f between the number of type Ib--Ic and of type II supernovae. We…