Bright X-ray sources have been discovered in nearby galaxies since the 1970s and with the wide X-ray surveys carried out with Chandra, XMM-Newton, Swift and eRosita, many more have been revealed. Those X-ray sources with luminosities greater than ~1e39 erg/s, lying outside of the central nucleus, have been referred to as ultraluminous X-ray sources (ULXs) and for the brightest, with...
The LIGO Scientific Collaboration and Virgo Collaboration have so far announced about 90 detections of gravitational waves, all of them associated with mergers of compact objects at high redshifts. These signals are transient and bright, typically presenting a strain amplitude of 10-21 for most of the time. By contrast, continuous gravitational waves (CWs) - a persistent though orders of...
In this talk I will review recent and future (possible)
progress on time domain and multi-messenger astronomy from an X-ray
perspective.
