Proc. IAU volume 13, issue S336, P137-138 2017 DOI: 10.1017/s1743921317009759 View full text
Elisabetta Ladu, Andrea Tarchi, Paola Castangia, Gabriele Surcis, Christian Henkel

Abstract: AbstractWe present a search for OH maser emission in galaxies hosting H2O masers with the 100-m Effelsberg radio telescope and the Green Bank Telescope (GBT). This survey is aimed at investigating the apparent rarity and/or possible mutual exclusion of megamaser emission from OH and H2O in the same galaxy. Our study establishes new and better upper limits on the OH maser luminosity. Our work duplicates the number of H2O masers searched for OH emission. No new maser detections have been found. OH absorption, bo…

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