Tidal disruption events (TDEs) occur when a star gets torn apart by a supermassive black
hole as it crosses its tidal radius. We present late-time optical and X-ray observations of the …

We present radio observations of 23 optically discovered tidal disruption events (TDEs) on
timescales of∼ 500–3200 days postdiscovery. We detect nine new TDEs that did not have …

Stars embedded in active galactic nucleus (AGN) discs or captured by them may scatter onto
the supermassive black hole (SMBH), leading to a tidal disruption event (TDE). Using the …

The Eigenvector 1 schema, or the main sequence of quasars, was introduced as an
analogous scheme to the HR diagram that would allow us to understand the more complex …

We present observations from X-ray to mid-infrared wavelengths of the most energetic non-
quasar transient ever observed, AT2021lwx. Our data show a single optical brightening by a …

We present an extensive analysis of the optical and ultraviolet (UV) properties of AT 2023clx,
the closest optical/UV tidal disruption event (TDE) to date (z= 0.01107), which occurred in …

We report the discovery of Swift J221951− 484240 (hereafter: J221951), a luminous slow-
evolving blue transient that was detected by the Neil Gehrels Swift Observatory …

Tidal disruption events occur when a star is disrupted by a supermassive black hole,
resulting in an elongated stream of gas that partly falls back to the pericentre. Due to apsidal …

The extremes of Active Galactic Nuclei (AGN) variability offer valuable new insights into the
drivers and physics of AGN. We discuss some of the most extreme cases of AGN variability; …

With a growing number of facilities able to monitor the entire sky and produce light curves
with a cadence of days, in recent years there has been an increased rate of detection of …