Optical spectra of type Ia supernovae at z = 0.46 and z = 1.2

Alison L. Coil, Thomas Matheson, Alexei V. Filippenko, Douglas C. Leonard, John Tonry, Adam G. Riess, Peter Challis, Alejandro Clocchiatti, Peter M. Garnavich, Craig J. Hogan, Saurabh Jha, Robert P. Kirshner, B. Leibundgut, M. M. Phillips, Brian P. Schmidt, Robert A. Schommer, R. Chris Smith, Alicia M. Soderberg, J. Spyromilio, Christopher StubbsNicholas B. Suntzeff, Patrick Woudt

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We present optical spectra, obtained with the Keck 10 m telescope, of two high-redshift Type Ia supernovae (SNe Ia) discovered by the High-z Supernova Search Team: SN 1999ff at z = 0.455 and SN 1999fv at z ∼ 1.2, the highest redshift published SN Ia spectrum. Both SNe were at maximum light when the spectra were taken. We compare our high-z spectra with low-z normal and peculiar SNe Ia as well as with SNe Ic, Ib, and II. There are no significant differences between SN 1999ff and normal SNe Ia at low redshift. SN 1999fv appears to be an SN Ia and does not resemble the most peculiar nearby SNe Ia.

Original languageEnglish (US)
Pages (from-to)L111-L114
JournalAstrophysical Journal
Issue number2 PART 2
StatePublished - Dec 1 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Cosmology: observations
  • Supernovae: general
  • Supernovae: individual (SN 1999ff, SN 1999fv)


Dive into the research topics of 'Optical spectra of type Ia supernovae at z = 0.46 and z = 1.2'. Together they form a unique fingerprint.

Cite this