A Larger Extent for the Ophiuchus Stream
  We present new kinematic data for the Ophiuchus stellar stream. Spectra have
been taken of member candidates at the MMT telescope using Hectospec,
Hectochelle and Binospec, which provide more than 1800 new velocities. Combined
with proper motion measurements of stars in the field by the Gaia - DR2
catalog, we have derived stream membership probabilities, resulting in the
detection of more than 200 likely members. These data show the stream extends
to more than three times the length shown in the discovery data. A spur to the
main stream is also detected. The high resolution spectra allow us to resolve
the stellar velocity dispersion, found to be $1.6 \pm 0.3 $ km/sec.
