... This is a list of the Supernovae discovered in 2003. ... 2003ma , IAUC 9092 2003/12/13 by SuperMACHO Mag 23.0 (20.5) type IIn . ... 2003lx, 2003ly IAUC 8362 discovered 2003/04/24 and 2003/12/20 by SDSS both type Ia, 2003lx reached Mag 18.8 in April of 2003 . ... 2003az - 2003be , IAUC 8081 discovered 2003/02/20.91-22.08 by HST GOODS team the brightest of which was mag 23.1. 2003ax, 2003ay , IAUC 8079 discovered 2003/02/09.3 - 19.1 by Nearby Supernova Factory the brightest of which is Mag 19.0. ...