  The number of binaries containing black holes or neutron stars depends
critically on the fraction of binaries that survive supernova explosions. We
searched for surviving star plus remnant binaries in a sample of 49 supernova
remnants (SNR) containing 23 previously identified compact remnants and three
high mass X-ray binaries (HMXB), finding no new interacting or non-interacting
binaries. The upper limits on any main sequence stellar companion are typically
<0.2Msun and are at worst <3Msun. This implies that f<0.1 of core collapse SNRs
contain a non-interacting binary, and f=0.083 (0.032<f<0.17) contain an
interacting binary at 90% confidence. We also find that the transverse
velocities of HMXBs are low, with a median of only 12~km/s for field HMXBs, so
surviving binaries will generally be found very close to the explosion center.
We compare the results to a "standard" StarTrack binary population synthesis
(BPS) model, finding reasonable agreement with the observations. In particular,
the BPS models predict that 5% of SNe should leave a star plus remnant binary.
