A joint analysis of AMI and CARMA observations of the recently
  discovered SZ galaxy cluster system AMI-CL J0300+2613
  We present CARMA observations of a massive galaxy cluster discovered in the
AMI blind SZ survey. Without knowledge of the cluster redshift a Bayesian
analysis of the AMI, CARMA and joint AMI & CARMA uv-data is used to quantify
the detection significance and parameterise both the physical and observational
properties of the cluster whilst accounting for the statistics of primary CMB
anisotropies, receiver noise and radio sources. The joint analysis of the AMI &
CARMA uv-data was performed with two parametric physical cluster models: the
{\beta}-model; and the model described in Olamaie et al. 2012 with the pressure
profile fixed according to Arnaud et al. 2010. The cluster mass derived from
these different models is comparable but our Bayesian evidences indicate a
preference for the {\beta}-profile which we, therefore, use throughout our
analysis. From the CARMA data alone we obtain a Bayesian probability of
detection ratio of 12.8:1 when assuming that a cluster exists within our search
area; alternatively assuming that Jenkins et al. 2001 accurately predicts the
number of clusters as a function of mass and redshift, the Bayesian probability
of detection is 0.29:1. From the analysis of the AMI or AMI & CARMA data the
probability of detection ratio exceeds 4.5x10^3:1. Performing a joint analysis
of the AMI & CARMA data with a physical cluster model we derive the total mass
internal to r200 as MT,200 = 4.1x10^14Msun. Using a phenomenological
{\beta}-model to quantify the temperature decrement as a function of angular
distance we find a central SZ temperature decrement of 170{\mu}K in the AMI &
CARMA data. The SZ decrement in the CARMA data is weaker than expected and we
speculate that this is a consequence of the cluster morphology. In a
forthcoming study we will assess the impact of cluster morphology on the SZ
decrements that are observed with interferometers such as AMI and CARMA.
