The paper "Modern observations of Hubble's first-discovered Cepheid in M31" has been accepted for publication to PASP, and is now available on arXiv.org.
This paper was a result of observations made for Alert Notice 422, which called for observations in support of a Hubble Space Telescope observing program on M31-V1, the first Cepheid variable discovered by Edwin Hubble in the Andromeda Galaxy. AAVSO observers provided sufficient observations for HST to complete their observing program, but also generated enough data on their own to warrant a modern study of this historically important Cepheid.
You may find a copy of this paper on arXiv.org at http://arxiv.org/abs/1111.0262