Supernovae in Galaxies Far Far Away Discovered with NEAT

SN 1999am SN 1999as SN 1999at

NEAT is unusually capable of finding supernovae shortly after they explode in their parent galaxies (minus the light travel time, of course). This is because NEAT covers a large part of the sky every night including, serindipitously, many galaxies. Furthermore NEAT has looked at the same portion of the sky in the past, thus allowing our colleagues at the LBNL Supernova Cosmology Project (SCP) to compare recent images that contain the supernovae with past images that do not. During two nights of observations in February 1999, 5 supernovae candidates were discovered with the NEAT data and confirmed with follow-up observations by the SCP. The three pictured above were discovered on 18 February 1999; the two below on 19 February 1999.The IAU Circulars that announce the NEAT supernovae discoveries are: 7122, 7128, 7133

SN 1999bc SN 1999bd