Free Access
Volume 535, November 2011
Article Number L6
Number of page(s) 5
Section Letters
Published online 18 November 2011

Online material

thumbnail Fig. 1

Histograms of the ejection velocities in core-collapse events compiled by Maurer et al. (2010), in 44 normal and 12 broad-line (BL) events. The mean velocity 5680 km s-1 of the latter is 3.9 standard deviations away from the mean velocity 4720 km s-1 of the first, which is indicative of a separate group of relatively hyper-energetic events.

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© ESO, 2011

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