A Type II Supernova Hubble diagram from the CSP-I, SDSS-II, and SNLS
  surveys
  The coming era of large photometric wide-field surveys will increase the
detection rate of supernovae by orders of magnitude. Such numbers will restrict
spectroscopic follow-up in the vast majority of cases, and hence new methods
based solely on photometric data must be developed. Here, we construct a
complete Hubble diagram of Type II supernovae combining data from three
different samples: the Carnegie Supernova Project-I, the Sloan Digital Sky
Survey-II SN, and the Supernova Legacy Survey. Applying the Photometric Colour
Method (PCM) to 73 Type II supernovae (SNe~II) with a redshift range of
0.01--0.5 and with no spectral information, we derive an intrinsic dispersion
of 0.35 mag. A comparison with the Standard Candle Method (SCM) using 61 SNe~II
is also performed and an intrinsic dispersion in the Hubble diagram of 0.27 mag
is derived, i.e., 13\% in distance uncertainties. Due to the lack of good
statistics at higher redshifts for both methods, only weak constraints on the
cosmological parameters are obtained. However, assuming a flat Universe and
using the PCM, we derive a Universe's matter density:
$\Omega_{m}$=0.32$^{+0.30}_{-0.21}$ providing a new independent evidence for
dark energy at the level of two sigma.
