Hildebrandt, H.; Arnouts, S.; Capak, P.; Moustakas, L. A.; Wolf, Christian; Abdalla, Filipe B.; Assef, R. J.; Banerji, Manda; Benitez, N.; Brammer, G. B.; Budavari, Tamas
Context. Photometric redshifts (photo-z's) have become an essential tool in extragalactic astronomy. Many current and upcoming observing programmes require great accuracy of photo-z's to reach their scientific goals. Aims. Here we introduce PHAT, the PHoto-z Accuracy Testing programme, an international initiative to test and compare different methods of photo-z estimation. Methods. Two different test environments are set up, one (PHAT0) based on simulations to test the basic functionality of...[Show more]
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