SPECTRA AND HUBBLE SPACE TELESCOPE LIGHT CURVES OF SIX TYPE Ia SUPERNOVAE AT 0.511 < z < 1.12 AND THE UNION2 COMPILATION

We report on work to increase the number of well-measured Type Ia supernovae (SNe Ia) at high redshifts. Light curves, including high signal-to-noise Hubble Space Telescope data, and spectra of six SNe Ia that were discovered during 2001, are presented. Additionally, for the two SNe with z > 1, we present ground-based J-band photometry from Gemini and the Very Large Telescope. These are among the most distant SNe Ia for which ground-based near-IR observations have been obtained. We add these six SNe Ia together with other data sets that have recently become available in the literature to the Union compilation. We have made a number of refinements to the Union analysis chain, the most important ones being the…

• UD
  U.S. Department of Energy

  Awards: -AC02-05CH11231, 05CH11231, AC02-05CH11231, DE-AC02, NAS 5-26555, DE-AC02-05CH11231, DE-AC02-
• NA
  National Aeronautics and Space Administration

  Awards: DE-AC02-05CH11231, NAS 5-26555, 5-26555
• DU
  Drexel University
• ST
  Space Telescope Science Institute

  Awards: NAS 5-26555, 5-26555, 26555
• SU
  Stockholms Universitet
• OO
  Office of Science

  Awards: AC02-05CH11231, -AC02-05CH11231, DE-AC02
• SA
  Science and Technology Facilities Council

  Awards: ST/H000704/1, ST/H002456/1
• JS
  Japan Society for the Promotion of Science

  Award: 20040002
• HE
  High Energy Physics

  Award: DE-AC02-05CH11231