Below you will see the SDSS image with the supernova marked. Did you find it?
As you can see, finding supernovae by eye is a challenge. The SDSS uses a computer program to help with the search. The computer points out likely supernovae, and then astronomers make follow up observations to confirm the discovery.
After getting the SDSS image, use the given RA and Dec in the POSS Image Retrieval tool to find POSS images of the same field. Compare the fields to find the supernovae. (Note: the images are not oriented the same direction!) The second supernova is rather hard to find.