Spectroscopic confirmation of high-redshift supernovae with the ESO VLT

Journal Article · Mon Oct 04 00:00:00 EDT 2004 · Astronomy and Astrophysics

OSTI ID:841116

Lidman, C ^[1]; Howell, D A; Folatelli, G; Garavini, G; Nobili, S; Aldering, G; Amanullah, R; Antilogus, P; Astier, P; Blanc, G; Burns, M S; Conley, A; Deustua, S E; Doi, M; Ellis, R; Fabbro, S; Fadeyev, V; Gibbons, R; Goldhaber, G; Goobar, A ; Groom, D E; Hook, I; Kashikawa, N; Kim, A G; Knop, R A; Lee, B C; Mendez, J; Morokuma, T; Motohara, K; Nugent, P E; Pain, R; Perlmutter, S; Prasad, V; Quimby, R; Raux, J; Regnault, N; Ruiz-Lapuente, P; Sainton, G; Schaefer, B E; Schahmaneche, K; Smith, E; Spadafora, A L; Stanishev, V; Walton, N A; Wang, L; Wood-Vasey, W M; Yasuda,

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1. LBNL Library

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using type Ia supernovae (SNe Ia) over a wide range of redshifts. From the spectra alone, 20 candidates are spectrally classified as SNe Ia with redshifts ranging from z = 0.212 to z = 1.181. Of the remaining 19 candidates, 1 might be a type II supernova and 11 exhibit broad supernova-like spectral features and/or have supernova-like light curves. The candidates were discovered in 8 separate ground-based searches. In those searches in which SNe Ia at z {approx} 0.5 were targeted, over 80 percent of the observed candidates were spectrally classified as SNe Ia. In those searches in which SNe Ia with z > 1 were targeted, 4 candidates with z > 1 were spectrally classified as SNe Ia and later followed with ground and space based observatories. We present the spectra of all candidates, including those that could not be spectrally classified as supernova.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 841116
• Report Number(s): LBNL--57859
• Journal Information: Astronomy and Astrophysics, Journal Name: Astronomy and Astrophysics Vol. 430; ISSN AAEJAF; ISSN 0004-6361
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
RED SHIFT
SPECTROSCOPY
SUPERNOVA COSMOLOGY DARK ENERGY
SUPERNOVAE