AAS 201st Meeting, January, 2003
Session 123. Supernovae and Other Distance Indicators
Poster, Thursday, January 9, 2003, 9:20am-4:00pm, Exhibit Hall AB

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[123.07] Preliminary Infrared Light Curves of Supernov{æ} at z \approx 0.5

S. T. Holland (Notre Dame), S. Jha (HSCfA), B. P. Schmidt (MSSSO), P. Challis, R. Kirshner, T. Matheson (HSCfA), A. Clocchiatti (U. Católica de Chile), A. V. Filippenko, W. D. Li (UCB), P. M. Garnavich (Notre Dame), C. J. Hogan, C. Stubbs (Wash.), B. Leibundgut, J. Sollerman, J. Spyromilio (ESO), M. M. Phillips (Carnegie, Las Campanas), A. G. Riess (STScI), R. A. Schommer, C. Smith, N. B. Suntzeff (CTIO), J. L. Tonry (Hawaii), High-z Supernova Search Team

We present J-band light curves of seven Type~Ia supernov{æ} located at redshifts of approximately 0.5. These supernov{æ} were observed during the High-z Supernova Search Team\/'s autumn 2000 campaign. At this redshift the observed J-band light curve approximately corresponds to the rest-frame I~band, so a direct comparison can be made between local and high-redshift Type Ia supernov{æ} at wavelengths where the effects of interstellar extinction are small. The goal of this study is to compare Type~Ia supernov{æ} at z \approx 0 and z \approx 0.5 in order to identify possible systematic differences that could cloud our understanding of the acceleration of the Universe.

S.T.H. and P.M.G acknowledge support from NASA Long-Term Space Astrophysics grand NAG 5-9364.

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The author(s) of this abstract have provided an email address for comments about the abstract: sholland@nd.edu

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