Neutral Hydrogen Observations of Low Surface Brightness Galaxies around
  M101 and NGC 5485
  We present atomic hydrogen (HI) observations using the Robert C. Byrd Green
Bank Telescope along the lines-of-sight to 27 low surface brightness (LSB)
dwarf galaxy candidates discovered in optical searches around M101. We detect
HI reservoirs in 5 targets and place stringent upper limits on the remaining
22, implying that they are gas poor. The distances to our HI detections range
from 7 Mpc --150 Mpc, demonstrating the utility of wide-bandpass HI
observations as a follow-up tool. The systemic velocities of 3 detections are
consistent with that of the NGC~5485 group behind M101, and we suggest that our
15 non-detections with lower distance limits from the optical are associated
with and have been stripped by that group. We find that the gas richnesses of
confirmed M101 satellites are broadly consistent with those of the Milky Way
satellites, as well as with those of satellites around other hosts of
comparable mass, when survey completeness is taken into account. This suggests
that satellite quenching and gas stripping proceeds similarly around halos of
similar mass, in line with theoretical expectations.
