SN 1994D

SN 1994D was a Type Ia supernova event in the outskirts of galaxy NGC 4526. It was offset by $9 arcsecond$ west and $7.8 arcsecond$ south of the galaxy center and positioned near a prominent dust lane. It was caused by the explosion of a white dwarf star composed of carbon and oxygen. This event was discovered on March 7, 1994 by R. R. Treffers and associates using the automated 30-inch telescope at Leuschner Observatory. It reached peak visual brightness two weeks later on March 22. Modelling of the light curve indicates the explosion would have been visible around March 3-4. A possible detection of helium in the spectrum was made by W. P. S. Meikle and associates in 1996. A mass of 0.014 to $0.03 Solar mass$ in helium would be needed to produce this feature.