@article {60261,
	title = {The clustering of galaxies in the SDSS-III DR9 Baryon Oscillation Spectroscopic Survey: constraints on primordial non-Gaussianity},
	journal = {Monthly Notices of the Royal Astronomical Society},
	volume = {428},
	year = {2013},
	month = {January 1, 2013},
	pages = {1116-1127},
	abstract = {We analyse the density field of 264 283 galaxies observed by the SloanDigital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic Survey(BOSS) and included in the SDSS Data Release 9 (DR9). In total, the SDSSDR9 BOSS data include spectroscopic redshifts for over 400 000 galaxiesspread over a footprint of more than 3000 deg2. We measurethe power spectrum of these galaxies with redshifts 0.43 < z < 0.7in order to constrain the amount of local non-Gaussianity,f{_N_L^local}, in the primordial density field, paying particularattention to the impact of systematic uncertainties. The BOSS galaxydensity field is systematically affected by the local stellar densityand this influences the ability to accurately measure f{_N_L^local}. Inthe absence of any correction, we find (erroneously) that theprobability that f{_N_L^local} is greater than zero, P(f{_N_L^local}> 0), is 99.5 per cent. After quantifying and correcting for thesystematic bias and including the added uncertainty, we find - 45  0) = 91.0 per cent. A more conservative approach assumes that wehave only learnt the k dependence of the systematic bias and allows anyamplitude for the systematic correction; we find that the systematiceffect is not fully degenerate with that of f{_N_L^local}, and wedetermine that -82 < f{_N_L^local} < 178 (at 95 per centconfidence) and P(f{_N_L^local} > 0) = 68 per cent. This analysisdemonstrates the importance of accounting for the impact of Galacticforegrounds on f{_N_L^local} measurements. We outline the methods thataccount for these systematic biases and uncertainties. We expect ourmethods to yield robust constraints on f{_N_L^local} for both our ownand future large-scale structure investigations.},
	keywords = {cosmology: observations;  (cosmology:) inflation;  (cosmology:) large-scale structure of Universe},
	url = {http://adsabs.harvard.edu/abs/2013MNRAS.428.1116R},
	author = {Ross, Ashley J. and Percival, Will J. and Carnero, Aurelio and Zhao, Gong-bo and Manera, Marc and Raccanelli, Alvise and Aubourg, Eric and Bizyaev, Dmitry and Brewington, Howard and Brinkmann, J. and Brownstein, Joel R. and Cuesta, Antonio J. and da Costa, Luiz A. N. and Eisenstein, Daniel J. and Ebelke, Garrett and Guo, Hong and Hamilton, Jean-Christophe and Vargas Maga{\~n}a, Mariana and Malanushenko, Elena and Malanushenko, Viktor and Maraston, Claudia and Montesano, Francesco and Nichol, Robert C. and Oravetz, Daniel and Pan, Kaike and Prada, Francisco and S{\'a}nchez, Ariel G. and Samushia, Lado and Schlegel, David J. and Schneider, Donald P. and Seo, Hee-Jong and Sheldon, Alaina and Simmons, Audrey and Snedden, Stephanie and Swanson, Molly E. C. and Thomas, Daniel and Tinker, Jeremy L. and Tojeiro, Rita and Zehavi, Idit}
}
