Slide 1

Target Selection and photo-z Filipe B. Abdalla Slide 2 Usual spectroscopic targets: KAOS/WFMOS/BigBOSS/Sumire/DESpec etc LRG galaxies out to z~1 with absorption line spectra Emission line galaxies out to z~1.7 depending on how red the spectrographs go, with OII mainly If IR spectra, gets galaxies around z~2 High redshift galaxies at z~3 need blue sensitivity and will get a secure redshift with Lyman alpha in the UV. QSOs will also rely on the blue end of the spectrograph Slide 3 A DESspec target selection? 1)100% spectroscopic completeness of DES galaxies to r=21stmagnitude with resolution 50 km/s. 2)Case 1 plus 50% completeness to r=22.5 magnitude evenly distributed over all redshift bins 3)~300 km/s redshift precision with 100% completeness to r=22ndmagnitude Q: on what parameters give the most improvement on FoM and advice as to what new techniques are opened up. Slide 4 Largest FOMs are always with a constant number density. 1- Constant density 0.2