Altavilla, GStehle, MRuiz-Lapuente, PMazzali, Paolo APignata, GuilianoBalastegui, ABenetti, StefanoBlanc, GCanal, RElias-Rosa (Elias de la Rosa), NancyGoobar, ArielHarutyunyan, APastorello, AndreaPatat, FerdinandoRich, JoshuaSalvo, MariaSchmidt, BrianStanishev, ValleryTaubenberger, StefanoTuratto, MassimoHillebrandt, Wolfgang2015-12-070004-6361http://hdl.handle.net/1885/24599Aims. We study the optical spectroscopic properties of Type Ia Supernova (SN Ia) 2004dt, focusing our attention on the early epochs. Methods. Observation triggered soon after the SN 2004dt discovery allowed us to obtain a spectrophotometric coverage fromThis work has been supported by the European Community’s Human Potential Program under contract HPRN-CT-2002-00303, under contract HPRN-CT-2002-00303, “The Physics of Type Ia Supernovae”11 pageshttps://www.aanda.org/author-information/copyright Reproduced with permission from Astronomy & Astrophysics, © ESO 2007 (Publisher journal website 16/10/2018).Keywords: Density of gases; Emission spectroscopy; Oxygen; Polarization; Spectrophotometry; Spectroscopic evolution; Stars: supernovae: general; Stars Methods: observational; Stars: supernovae: general; Stars: supernovae: individual: SN2004dt; Techniques: spectroscopic200710.1051/0004-6361:200774872015-12-07