MASTER-Kislovodsk robotic telescope has obtained NGC4424 area on 2012-05-15.7903 UT during survey.
The OT is marginally seen in 1 image. The OT unfiltered magnitude is ~19 m (limit 20.2m).
The SN2012cg discovered after two days (http://www.cbat.eps.harvard.edu/iau/cbet/003100/CBET003111.txt"
CBET 3105, M. Kandrashoff et al.).