Ubvri light curves of 44 type ia supernovae - INSPIRE

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Ubvri light curves of 44 type ia supernovae

Sep, 2005

71 pages

Published in:

Astron.J. 131 (2006) 527-554

e-Print:

astro-ph/0509234 [astro-ph]

DOI:

10.1086/497989

View in:

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Abstract: (arXiv)

We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics. The data set comprises 2190 observations and is the largest homogeneously observed and reduced sample of SN Ia to date, nearly doubling the number of well-observed, nearby SN Ia with published multicolor CCD light curves. The large sample of U-band photometry is a unique addition, with important connections to SN Ia observed at high redshift. The decline rate of SN Ia U-band light curves correlates well with the decline rate in other bands, as does the U-B color at maximum light. However, the U-band peak magnitudes show an increased dispersion relative to other bands even after accounting for extinction and decline rate, amounting to an additional ~40% intrinsic scatter compared to B-band.

supernovae: general
techniques: photometric

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