Observations of the supernova 1985F with a new spectrograph

Details Observations of the supernova 1985F with a new spectrograph Observations of the supernova 1985F with a new spectrograph

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.125..175p&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 125, no. 1, Aug. 1986, p. 175-180.

Astronomy and Astrophysics

Astrophysics

Line Spectra, Spectrographs, Stellar Spectrophotometry, Supernovae, Broadband, H Alpha Line, Oxygen, Spectral Line Width

Scientific paper

The spectrum of the supernova 1985F is presented over the wavelength range 4600 to 10,000 A as recorded in one 200 s exposure on May 16, 1985, when its age was estimated to be t of about 240 days. This wideband measurement with a resolution of 20 A was made with the new Faint Object Spectrograph on the Isaac Newton Telescope at the Observatorio del Roque de los Muchachos. Broad line features were observed for the ions OI, OII, and OIII, CaII, and NaI, although broad H-alpha was notably absent. This suggests type I rather than type II properties, but Filippenko and Sargent (1985) have concluded this object to be of neither type and of a new peculiar class. The Ca II infra-red triplet at 8600 A which has not been previously reported in the spectrum of SN1985F has been observed, in addition to the semiforbidden CI at 9800 A.

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