Intermediate-band Photometry of Type Ia Supernovae

Details Intermediate-band Photometry of Type Ia Supernovae Intermediate-band Photometry of Type Ia Supernovae

2004-09-15

arxiv.org/abs/astro-ph/0409375v1

Astronomy and Astrophysics

Astrophysics

3pages+2figures, in: Supernovae as Cosmological Lighthouses Padua, June 16- 19, eds. Turatto et al., ASP Conference Series

Scientific paper

We present optical light curves of five Type Ia supernovae (2002er, 2002fk, 2003cg, 2003du, 2003fk). The photometric observations were performed in a set of intermediate-band filters. SNe 2002er, 2003du appear to be normal SN Ia events with similar light curve shapes, while SN 2003kf shows the behavior of a brighter SN Ia with slower decline rate after maximum. The light curves of SN 2003cg is unusual; they show a fast rise and dramatic decline near maximum and do not display secondary peak at longer wavelengths during 15-30 days after maximum light. This suggests that SN 2003cg is likely to be an intrinsically subluminous, 91bg-like SN Ia. Exploration of SN Ia feature lines through intermediate-band photometry is briefly discussed.

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