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Using the Expanded Very Large Array, we have conducted a search for 22.2 GHzH2O megamaser emission in the strongly lensed submm galaxy, SMM J16359+6612 atz=2.517. This object is lensed into three components, and after a correctionfor magnification is applied to its submm-wavelength flux density, it istypical of the bulk of the high-redshift, submm galaxy population responsiblefor the 850 um extragalactic background (S(850um)~1 mJy). We do not detect anyH2O megamaser emission, but the lensing allows us to place an interestingconstraint on the luminosity of any megamasers present, L(H2O) < 5305 solarluminosities for an assumed linewidth of 80 km/s. Because the far-infraredluminosity in submm galaxies is mainly powered by star formation, and veryluminous H2O megamasers are more commonly associated with quasar activity, itcould be that blind searches for H2O megamasers will not be an effective meansof determining redshifts for less luminous members of the submm galaxypopulation.

An EVLA search for water megamaser emission in the submm galaxy SMM J16359+6612 at z=2.5