These three supernovae have been found by Lick Observatory Supernova Search in USA. SN2007il was found 10th September, SN2007ir was found 12th September and SN2007is was found 14th September by LOSS.

Photographers at 16/17.9.2007 night at Taurus Hill Observatory: Veli-Pekka Hentunen and Markku Nissinen.