Empirical Near-Infrared Spectral Templates from SPHEREx: Disentangling AGN and Host-Galaxy Emission

arXiv:2609.02167 · astro-ph.GA, astro-ph.IM · Submitted 2026-09-02 · Read on arXiv

astro-ph.GA, astro-ph.IM

Submitted: 2026-09-02

Updated: 2026-09-02

Code: https://github.com/SPHEREx/Public-products

Terminology

• AGN — 158× in this paper · explained in 1 episode
• Aperture — 13× in this paper · explained in 1 episode
• Pruning — 8× in this paper · explained in 4 episodes
• Trace — 6× in this paper · explained in 2 episodes
• Cosine Similarity — 4× in this paper · explained in 3 episodes
• Metallicity — 4× in this paper · explained in 3 episodes
• Accuracy — 3× in this paper · explained in 1 episode
• Core — 3× in this paper · explained in 2 episodes
• Redundancy — 3× in this paper · explained in 2 episodes
• Regularization — 3× in this paper · explained in 3 episodes
• Additivity — 2× in this paper · explained in 1 episode
• Clustering — 2× in this paper · explained in 2 episodes
• Median Absolute Deviation — 2× in this paper
• National Science Foundation — 2× in this paper
• Two-stage training — 2× in this paper · explained in 2 episodes
• AGNs in the North Ecliptic Pole — 1× in this paper
• Aggregation — 1× in this paper · explained in 1 episode
• Aperture Photometry — 1× in this paper · explained in 1 episode
• Calibration — 1× in this paper · explained in 7 episodes
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Dust Attenuation — 1× in this paper · explained in 2 episodes
• External Validation — 1× in this paper · explained in 2 episodes
• Forward modeling — 1× in this paper · explained in 2 episodes
• Objective Function — 1× in this paper · explained in 2 episodes
• Principal Component Analysis (PCA) — 1× in this paper · explained in 4 episodes
• Reconstruction Error — 1× in this paper · explained in 2 episodes
• Selection Bias — 1× in this paper · explained in 4 episodes
• Spectral Gap — 1× in this paper · explained in 5 episodes
• Spectral Signature — 1× in this paper · explained in 2 episodes
• Two-Stage Framework — 1× in this paper · explained in 2 episodes

Sources

• Three Hundred Quasars from the Couch: A first look at high-redshift quasar discovery with SPHEREx
• DeepDISC-Euclid: Source Classification and Photometric Redshifts in Euclid Deep Field North With a Pixel-Level Deep Learning Approach
• The Dark Energy Spectroscopic Instrument (DESI)

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