The Lyman-α forest catalogue from the Dark Energy Spectroscopic Instrument Early Data Release
C. Ramírez-Pérez, Ignasi Pérez-Ràfols, Andreu Font-Ribera, Marjani Karim, E. Armengaud, J Bautista, S. F. Beltran, L. Cabayol-Garcia, Z Cai, Solène Chabanier, E. Chaussidon, J. Chaves-Montero, Andrei Cuceu, R de la Cruz, J. García-Bellido, Alma X. González‐Morales, C. Gordon, H. K. Herrera-Alcantar, Vid Iršič, Mustapha Ishak, Naim Göksel Karaçaylı, Zarija Lukić, Christopher J. Manser, Paulo Montero-Camacho, L. Napolitano, Gustavo Niz, Matthew M. Pieri, C. Ravoux, Francesco Sinigaglia, T. Tan, Michael Walther, Ben Wang, J. Aguilar, S. P. Ahlen, S. Bailey, D. Brooks, T. Claybaugh, Kyle Dawson, A de la Macorra, G. Dhungana, P. Doel, K. Fanning, J. E. Forero-Romero, Satya Gontcho A Gontcho, J. Guy, K. Honscheid, R. Kehoe, Theodore Kisner, Martin Landriau, L. Le Guillou, M. E. Levi, C. Magneville, Paul Martini, Aaron Meisner, R. Miquel, John Moustakas, Eva-Maria Mueller, A. Muñoz-Gutiérrez, Jundan Nie, N. Palanque‐Delabrouille, Will J. Percival, Graziano Rossi, E. Sánchez, Edward F. Schlafly, David J. Schlegel, Hee‐Jong Seo, G. Tarlé, B. A. Weaver, Christophe Yèche, Zhiming Zhou
Abstract
ABSTRACT We present and validate the catalogue of Lyman-α forest fluctuations for 3D analyses using the Early Data Release (EDR) from the Dark Energy Spectroscopic Instrument (DESI) survey. We used 88 511 quasars collected from DESI Survey Validation (SV) data and the first two months of the main survey (M2). We present several improvements to the method used to extract the Lyman-α absorption fluctuations performed in previous analyses from the Sloan Digital Sky Survey (SDSS). In particular, we modify the weighting scheme and show that it can improve the precision of the correlation function measurement by more than 20 per cent. This catalogue can be downloaded from https://data.desi.lbl.gov/public/edr/vac/edr/lya/fuji/v0.3, and it will be used in the near future for the first DESI measurements of the 3D correlations in the Lyman-α forest.