23–24 Oct 2023
UB Physics Faculty, Sala de Graus Eduard Fontserè
Europe/Madrid timezone

Quasar classification and resdhift estimation

24 Oct 2023, 12:00
30m
Sala de Graus Eduard Fontserè (UB Physics Faculty, Sala de Graus Eduard Fontserè)

Sala de Graus Eduard Fontserè

UB Physics Faculty, Sala de Graus Eduard Fontserè

Carrer de Martí i Franquès, 1, 11, 08028 Barcelona

Speaker

Ignasi Pérez (ICCUB)

Description

I will present SQUEzE, a machine-learning-based quasar classifier that assigns redshifts to the classified objects. SQUEzE was originally designed to work with SDSS (DESI and WEAVE too) spectra but is highly flexible and can also cope with photometric data from multi-narrow-band photometric surveys (e.g. J-PAS). It follows the human visual inspection procedure and classifies the objects using random forest classifiers based on the found emission line peaks. The redshifts are automatically extracted from the position of the peaks.

Primary author

Presentation materials