Optical and Near-Infrared Observations of the Peculiar Type ia Supernova 1999ac
Optical and Near-Infrared Observations of the Peculiar Type ia Supernova 1999ac
We present 39 nights of optical photometry, 34 nights of IR photometry, and 4 nights of optical spectroscopy of the Type Ia supernova 1999ac. This supernova was discovered 2 weeks before maximum light, and observations were begun shortly thereafter. At early times its spectra resembled the unusual SN 1999aa and …