HA
Oct 13, 2015
Challenges for DESI Fibre Assigment: Mitigating redshift incompleteness in the DESI survey
Abstract. The Dark Energy Spectroscopic Instrument (DESI) will start operating around 2018, using baryonic acoustic oscillations (BAO) amongst other techniques to make accurate measurements of Dark Energy and its effect on the accelerating expansion of the Universe. DESI will use a 5000-fibre spectrograph while mapping millions of galaxies and quasars. Therefore, there will be missed galaxies in the survey. We investigate the impact of redshift incompleteness caused by galaxies that are not assigned fibres, and use and compare different methods to mitigate this incompleteness and test it on mock catalogues for the Bright Galaxy Survey (BGS) to achieve the true pair correlation function for a more accurate measurement of the BAO peak. We compare the effect of these corrections on different r-band magnitudes (19.3, 19.5, 19.7 and 19.9) to make a comparison of how well the corrections work on different magnitude limits.