BV RI Photometry of Supernovae
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CERN Document Server Accepted by Publications of the Astronomical Society of the Pacific BV RI Photometry of Supernovae Wynn C. G. Ho1;2, Schuyler D. Van Dyk3,ChienY.Peng4, Alexei V. Filippenko5, Douglas C. Leonard6, Thomas Matheson7, Richard R. Treffers8 Department of Astronomy, University of California, Berkeley, CA 94720-3411 and Michael W. Richmond9 Department of Physics, Rochester Institute of Technology, Rochester, NY 14623-5603 ABSTRACT We present optical photometry of one Type IIn supernova (1994Y) and nine Type Ia super- novae (1993Y, 1993Z, 1993ae, 1994B, 1994C, 1994M, 1994Q, 1994ae, and 1995D). SN 1993Y and SN 1993Z appear to be normal SN Ia events with similar rates of decline, but we do not have data near maximum brightness. The colors of SN 1994C suggest that it suffers from significant reddening or is intrinsically red. The light curves of SN 1994Y are complicated; they show a slow rise and gradual decline near maximum brightness in VRI and numerous changes in the decline rates at later times. SN 1994Y also demonstrates color evolution similar to that of the SN IIn 1988Z, but it is slightly more luminous and declines more rapidly than SN 1988Z. The be- havior of SN 1994Y indicates a small ejecta mass and a gradual strengthening of the Hα emission relative to the continuum. Subject headings: supernovae: general – supernovae: individual (1993Y, 1993Z, 1993ae, 1994B, 1994C, 1994M, 1994Q, 1994Y, 1994ae, 1995D) 1Also associated with Space Sciences Laboratory, and Department of Physics, University of California, Berkeley.
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