A Comparison and Joint Analysis of Sunyaev-Zel'dovich Effect
  Measurements from Planck and Bolocam for a set of 47 Massive Galaxy Clusters
  We measure the SZ signal toward a set of 47 clusters with a median mass of
$9.5 \times 10^{14}$ M$_{\odot}$ and a median redshift of 0.40 using data from
Planck and the ground-based Bolocam receiver. When Planck XMM-like masses are
used to set the scale radius $\theta_{\textrm{s}}$, we find consistency between
the integrated SZ signal, $Y_{\textrm{5R500}}$, derived from Bolocam and Planck
based on gNFW model fits using A10 shape parameters, with an average ratio of
$1.069 \pm 0.030$ (allowing for the $\simeq 5$% Bolocam flux calibration
uncertainty). We also perform a joint fit to the Bolocam and Planck data using
a modified A10 model with the outer logarithmic slope $\beta$ allowed to vary,
finding $\beta = 6.13 \pm 0.16 \pm 0.76$ (measurement error followed by
intrinsic scatter). In addition, we find that the value of $\beta$ scales with
mass and redshift according to $\beta \propto M^{0.077 \pm 0.026} \times
(1+z)^{-0.06 \pm 0.09}$. This mass scaling is in good agreement with recent
simulations. We do not observe the strong trend of $\beta$ with redshift seen
in simulations, though we conclude that this is most likely due to our sample
selection. Finally, we use Bolocam measurements of $Y_{500}$ to test the
accuracy of the Planck completeness estimate. We find consistency, with the
actual number of Planck detections falling approximately $1 \sigma$ below the
expectation from Bolocam. We translate this small difference into a constraint
on the the effective mass bias for the Planck cluster cosmology results, with
$(1-b) = 0.93 \pm 0.06$.
