Near-infrared Mira Period-Luminosity Relations in M33
  We analyze sparsely-sampled near-infrared (JHKs) light curves of a sample of
1781 Mira variable candidates in M33, originally discovered using I-band
time-series observations. We extend our single-band semi-parametric Gaussian
process modeling of Mira light curves to a multi-band version and obtain
improved period determinations. We use our previous results on near-infrared
properties of candidate Miras in the LMC to classify the majority of the M33
sample into Oxygen- or Carbon-rich subsets. We derive Period-Luminosity
relations for O-rich Miras and determine a distance modulus for M33 of 24.80 +-
0.06 mag.
