  The loss and noise mechanisms of superconducting resonators are useful tools
for understanding decoherence in superconducting circuits. While the loss
mechanisms have been heavily studied, noise in superconducting resonators has
only recently been investigated. In particular, there is an absence of
literature on noise in the single photon limit. Here, we measure the loss and
noise of an aluminium on silicon quarter-wavelength ($\lambda/4$) resonator in
the single photon regime.
