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

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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 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-$\alpha$ 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%.