# The Spectral Energy Distributions of Active Galactic Nuclei

## TL;DR

This paper constructs and tests spectral energy distributions (SEDs) of active galactic nuclei across multiple wavelengths, demonstrating improved accuracy in photometric redshift estimation compared to previous models.

## Contribution

The work introduces a new set of AGN SEDs spanning 0.09 to 30 microns, including Seyfert-like spectra, and benchmarks their effectiveness in photometric redshift determination.

## Key findings

- SEDs outperform previous models in redshift accuracy
- Constructed 41 individual and 80 Seyfert-like AGN SEDs
- Extended SEDs into X-ray and radio wavelengths

## Abstract

We present ongoing work on the spectral energy distributions (SEDs) of active galactic nuclei (AGNs), derived from X-ray, ultraviolet, optical, infrared and radio photometry and spectroscopy. Our work is motivated by new wide-field imaging surveys that will identify vast numbers of AGNs, and by the need to benchmark AGN SED fitting codes. We have constructed 41 SEDs of individual AGNs and 80 additional SEDs that mimic Seyfert spectra. All of our SEDs span 0.09 to 30 microns, while some extend into the X-ray and/or radio. We have tested the utility of the SEDs by using them to generate AGN photometric redshifts, and they outperform SEDs from the prior literature, including reduced redshift errors and flux density residuals.