"Annual review: Reverberation Mapping — Studying the Universe by Studying Active Galactic Nuclei"

I have recently been shown that it may be possible to use active galactic nuclei as standardisable candles, which would allow us to probe cosmological parameters at higher redshifts than possible with type Ia supernovae. In my annual review I talk about the progress I have made towards using DES and OzDES observation to make this a reality.