I observed SN 2013aa last night in the very bright galaxy NGC 5643.
It is quite far from the galaxy but as is quite isolated from other stars is quite easily seen.
I used eyepieces from a University Optics 55mm magx 60,also 17mm Nagler 103xmag and 9mm Nagler 200xmag.
Scope used 16" truss Newtonian.
As stated elsewhere this Supernova will be easily seen in scopes from about 6" and above.
Copy the BOSS image from the thread on the discovery started by Peter Marples
Here.
If you have not managed to observe a Supernova before, now is your chance.
Cheers