Discovery and Evolution of an Unusual Luminous Variable Star in NGC 3432 (Supernova 2000ch)
Discovery and Evolution of an Unusual Luminous Variable Star in NGC 3432 (Supernova 2000ch)
We present photometric and spectroscopic observations of SN 2000ch, an unusual and extremely luminous variable star located in the galaxy NGC 3432. The object was discovered on 2000 May 3.2 during the course of the Lick Observatory Supernova Search, at an unfiltered magnitude of about 17.4. Prediscovery images obtained in …