The Lyman-$\alpha$ forest catalog from the Dark Energy Spectroscopic Instrument Early Data Release

César Ramírez-Pérez , Ignasi Pérez-Ràfols , Andreu Font-Ribera , M Abdul Karim (1) , E Armengaud (1) , J Bautista (2) , S.F Beltran , L Cabayol-Garcia , Z Cai (3) , S Chabanier , E Chaussidon (1) , J Chaves-Montero , A Cuceu , R de la Cruz , J García-Bellido , A.X Gonzalez-Morales , C Gordon , H.K Herrera-Alcantar , V Iršič , M Ishak (3) , N.G Karaçaylı , Zarija Lukić , C.J Manser , P Montero-Camacho , L Napolitano , G Niz , M Pieri (4) , C Ravoux (2, 1) , F Sinigaglia , T Tan (5) , M Walther , B Wang (3) , J Aguilar , S Ahlen , S Bailey , D Brooks , T Claybaugh , K Dawson , A de la Macorra , G Dhungana , P Doel , K Fanning , J.E Forero-Romero , S.Gontchoa Gontcho , J Guy , K Honscheid , R Kehoe , T Kisner , M Landriau , L Le Guillou (5) , M.E Levi , C Magneville (1) , P Martini , A Meisner , R Miquel , J Moustakas , E Mueller , A Muñoz-Gutiérrez , J Nie , N Palanque-Delabrouille (1) , W.J Percival , G Rossi , E Sanchez , E.F Schlafly , D Schlegel , H Seo , G Tarlé , B.A Weaver , C Yèche (1) , Z Zhou

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 CPPM - Centre de Physique des Particules de Marseille
3 IReS - Institut de Recherches Subatomiques
4 LAM - Laboratoire d'Astrophysique de Marseille
5 LPNHE (UMR_7585) - Laboratoire de Physique Nucléaire et de Hautes Énergies

We present and validate the catalog of Lyman-$\alpha$ forest fluctuations for 3D analyses using the Early Data Release (EDR) from the Dark Energy Spectroscopic Instrument (DESI) survey. We used 96,317 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-$\alpha$ 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%. This catalog 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-$\alpha$ forest.

Keywords: catalogues; intergalactic medium; dark energy; large-scale structure of Universe

Domains: Astrophysics [astro-ph]

César Ramírez-Pérez, Ignasi Pérez-Ràfols, Andreu Font-Ribera, M Abdul Karim, E Armengaud, et al.. The Lyman-$\alpha$ forest catalog from the Dark Energy Spectroscopic Instrument Early Data Release. Mon.Not.Roy.Astron.Soc., 2024, 528 (4), pp.6666-6679. ⟨10.1093/mnras/stad3781⟩. ⟨hal-04143306⟩