The discovery of pulsars opened a new research field that allows studying a wide range of
physics under extreme conditions. More than 3,000 pulsars are currently known, including …

We summarize our current knowledge of neutron-star masses and radii. Recent
instrumentation and computational advances have resulted in a rapid increase in the …

The possible gamma-ray excess in the inner Galaxy and the Galactic center (GC) suggested
by Fermi-LAT observations has triggered a large number of studies. It has been interpreted …

Using γ-ray data from the Fermi Large Area Telescope, various groups have identified a
clear excess emission in the Inner Galaxy, at energies around a few GeV. This excess …

We present a new method to characterize unresolved point sources (PSs) generalizing
traditional template fits to account for non-Poissonian photon statistics. We apply this method …

The Galactic center excess (GCE) remains one of the most intriguing discoveries from the
Fermi Large Area Telescope (LAT) observations. We revisit the characteristics of the GCE by …

Stellar-mass black holes and neutron stars represent extremes in gravity, density, and
magnetic fields. They therefore serve as key objects in the study of multiple frontiers of …

Gravitational wave astronomy has set in motion a scientific revolution. To further enhance
the science reach of this emergent field of research, there is a pressing need to increase the …

The Crab nebula and its pulsar (referred to together as 'the Crab') have historically played a
central role in astrophysics. True to this legacy, several unique discoveries have been made …

The All-sky Medium Energy Gamma-ray Observatory eXplorer (AMEGO-X) is designed to
identify and characterize gamma rays from extreme explosions and accelerators. The main …