Discovery of H2O Megamasers in Obscured Active Galactic Nuclei
  Recently a new method to discover obscured active galactic nuclei (AGNs) by
utilizing X-ray and Infrared data has been developed. We carried out a survey
of H2O maser emission toward ten obscured AGNs with the Nobeyama 45-m
telescope. We newly detected the maser emission with the signal-noise-ratio
(SNR) of above 4 from two AGNs, NGC 1402 and NGC 7738. We also found a
tentative detection with its SNR > 3 in NGC 5037. The detection rate of 20% is
higher than those of previous surveys (usually several percents).
