Optical light curves of the type Ia supernovae SN 1990N and SN 1991T

P. Lira, Nicholas B. Suntzeff, M. M. Phillips, Mario Hamuy, José Maza, R. A. Schommer, R. C. Smith, Lisa A. Wells, R. Avilés, J. A. Baldwin, J. H. Elias, L. González, A. Layden, M. Navarrete, P. Ugarte, Alistair R. Walker, Gerard M. Williger, F. K. Baganoff, Arlin P.S. Crotts, R. Michael RichN. D. Tyson, A. Dey, P. Guhathakurta, J. Hibbard, Y. C. Kim, Daniel M. Rehner, E. Siciliano, Joshua Roth, Patrick Seitzer, T. B. Williams

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)


We present UBVRI light curves for the bright Type Ia supernovae SN 1990N in NGC 4639 and SN 1991T in NGC 4527, based on photometry gathered in the course of the Calán/Tololo supernova program. Both objects have well-sampled light curves starting several days before maximum light and spanning well through the exponential tail. These data supersede the preliminary photometry published by Leibundgut et al. and Phillips et al. The host galaxies for these supernovae have (or will have) accurate distances based on the Cepheid period-luminosity relationship. The photometric data in this paper provide template curves for the study of the general population of Type Ia supernovae and accurate photometric indices, needed for the Cepheid-supernova distance scale.

Original languageEnglish
Pages (from-to)234-246
Number of pages13
JournalAstronomical Journal
Issue number1
Publication statusPublished - 1998 Jan

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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