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Optical and Infrared Photometry of the Type Ia Supernovae 1991T, 1991bg, 1999ek, 2001bt, 2001cn, 2001cz, and 2002bo

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arxiv astro-ph/0409036 v2 pith:F4RQWUT3 submitted 2004-09-02 astro-ph

Optical and Infrared Photometry of the Type Ia Supernovae 1991T, 1991bg, 1999ek, 2001bt, 2001cn, 2001cz, and 2002bo

Kevin Krisciunas , Nicholas B. Suntzeff , Mark M. Phillips , Pablo Candia , Jose Luis Prieto , R. Antezana , R. Chassagne , H.-W. Chen
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M. Dickinson P. R. Eisenhardt J. Espinoza P. M. Garnavich D. Gonzalez T. E. Harrison M. Hamuy V. D. Ivanov W. Krzeminski C. Kulesa P. McCarthy A. Moro-Martin C. Muena A. Noriega-Crespo S. E. Persson P. A. Pinto M. Roth E. P. Rubenstein S. A. Stanford G. S. Stringfellow A. Zapata Alain Porter Marina Wischnjewsky
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keywords supernovaetypeabsolutelightmagnitudesmaximumnear-infrareddecline
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We present optical and/or infrared photometry of the Type Ia supernovae SN 1991T, SN 1991bg, SN 1999ek, SN 2001bt, SN 2001cn, SN 2001cz, and SN 2002bo. All but one of these supernovae have decline rate parameters Delta m_15(B) close to the median value of 1.1 for the whole class of Type Ia supernovae. The addition of these supernovae to the relationship between the near-infrared absolute magnitudes and Delta m_15(B) strengthens the previous relationships we have found, in that the maximum light absolute magnitudes are essentially independent of the decline rate parameter. (SN 1991bg, the prototype of the subclass of fast declining Type Ia supernovae, is a special case.) The dispersion in the Hubble diagram in JHK is only ~0.15 mag. The near-infrared properties of Type Ia supernovae continue to be excellent measures of the luminosity distances to the supernova host galaxies, due to the need for only small corrections from the epoch of observation to maximum light, low dispersion in absolute magnitudes at maximum light, and the minimal reddening effects in the near-infrared.

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  1. The type Ia supernova 2023vjh: a peculiar 1991bg-like SN with unusually faint light curves

    astro-ph.HE 2026-07 accept novelty 5.0

    SN 2023vjh is an unusually faint 91bg-like SN Ia whose light curves and colors suggest possible CSM extinction despite minimal host interstellar dust signatures.