Classification of Optical Transients: Experiences from PQ and CRTS Surveys A.A. Mahabal, S.G. Djorgovski, C. Donalek, A.J. Drake, M.J. Graham, R.D. Williams, B. Moghaddam and M. Turmon EAS Publications Series, 45 (2010) 173-178 Published online: 15 February 2011 DOI: 10.1051/eas/1045030