alone, the WMAP 5-year analysis obtaied an upper 95% confidence limit on the sum of the neutrinos masses of 1.3 eV, for a $\Lambda$CDM cosmology [@wmap5komatsu]. By adding galaxy clustering data to CMB data and marginalizing over the galactic bias, the upper limit decreases to around 0.7 eV - 1.0 eV, depending on the datasets used [e.g., @Tegmark06; @Fogli08]. If instead, distance indicators (supernovae and baryon acoustic oscillations) were combined with CMB, stronger constraints were obtained, e.g., ${\sum m_\nu}< 0.61$ eV [@wmap5komatsu]. When all of these probes were used together, the result improved to around 0.4 eV - 0.5 eV [e.g., @Goobar; @Kristiansen07]. Similar results were obtained using only CMB and galaxy clustering data but assuming that the bias was known [@Mctavish06], or measuring it independently [@biasnu]. By applying the latter technique to WMAP 5-year data and new galactic bias constraints, an improved value of ${\sum m_\nu}< 0.28$ eV was obtained [@Debernardis]. Lyman-$\alpha$ data was also added to different combinations of probes, producing results of around 0.15 eV - 0.3 eV, including the tighest constraint to date of ${\sum m_\nu}< 0.17$ eV [@Seljaklyalpha].

In this paper we present the first constraints on neutrino masses obtained with cosmic shear data. The 