TY - JOUR AU - Rosalba Perna AU - R. Soria AU - D. Pooley AU - L. Stella BT - Monthly Notices of the Royal Astronomical Society DA - Jan-03-2008 DO - 10.1111/j.1365-2966.2007.12821.x PY - 2008 SP - 1638 EP - 1648 T2 - Monthly Notices of the Royal Astronomical Society TI - How rapidly do neutron stars spin at birth? Constraints from archival X-ray observations of extragalactic supernovae VL - 384 SN - 0035-8711 ER -