| Issue |
A&A
Volume 430, Number 3, February II 2005
|
|
|---|---|---|
| Page(s) | 843 - 851 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361:20041504 | |
| Published online | 26 January 2005 | |
Spectroscopic confirmation of high-redshift supernovae with the ESO VLT *,**
1
European Southern Observatory, Chile e-mail: clidman@eso.org
2
E. O. Lawrence Berkeley National Laboratory
3
Department of Astronomy and Astrophysics, University of Toronto
4
Department of Physics, Stockholm University
5
LPNHE, CNRS-IN2P3, University of Paris VI & VII, Paris, France
6
Osservatorio Astronomico di Padova, Italy
7
Colorado College
8
Department of Physics, University of California Berkeley, Berkeley
9
American Astronomical Society
10
Institute of Astronomy, School of Science, University of Tokyo
11
California Institute of Technology
12
CENTRA-Centro M. de Astrofísica and Department of Physics, IST, Lisbon, Portugal
13
Department of Physics, University of Oxford, Nuclear & Astrophysics Laboratory
14
National Astronomical Observatory, Mitaka, Tokyo 181-0058, Japan
15
Department of Physics and Astronomy, Vanderbilt University
16
Isaac Newton Group, La Palma, Spain
17
Department of Astronomy, University of Barcelona
18
Louisiana State University, Department of Physics and Astronomy
19
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK
20
Institute for Cosmic Ray Research, University of Tokyo
Received:
22
June
2004
Accepted:
4
October
2004
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 
to
. 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
were targeted, over 80% of the observed candidates were
spectrally classified as SNe Ia. In those searches in which SNe Ia with
were targeted, 4 candidates with 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.
Key words: stars: supernovae: general / cosmology: observations
Based on observations obtained at the European Southern Observatory using the ESO Very Large Telescope on Cerro Paranal (ESO programs 265.A-5721(A), 67.A-0361(A), 267.A-5688(A), 169.A-0382(A) and (B)). Based in part on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. Based in part on data collected from the Canada-France-Hawaii Telescope Corporation, which is operated by the National Research Council of Canada, le Centre National de la Recherche Scientifique de France, and the University of Hawaii. Based in part on data collected at the Cerro Tololo Inter-American Observatory, which is operated by Association of Universities for Research in Astronomy, Inc. under a cooperative agreement with the National Science Foundation.
© ESO, 2005
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