Cassiopeia A (Cas A), the youngest known core-collapse supernova remnant (SNR) in the Milky Way, offers an unparalleled view of the explosions of massive stars. A >350 ks observation with XRISM has delivered an unprecedented high–spectral-resolution X-ray view of this archetypal remnant and produced the mission’s most productive dataset to date, with 5+ published papers. In this talk, I will...
The Square Kilometre Array (SKA) is a next-generation radio telescope currently under construction in South Africa and Australia.
Its low-frequency part (50-350 MHz), located in Australia, features nearly 60,000 antennas in a core region of about 1 km diameter.
The unprecedented antenna density allows to observe individual cosmic-ray air showers to a level of detail no other observatory can...
Fast radio bursts (FRBs) are millisecond-duration, extragalactic radio transients of unknown origin. The FRB backend on the CHIME telescope (CHIME/FRB) is the most prolific FRB discovery machine, having detected more than 4000 unique sources of FRBs. The recent addition of three CHIME Outrigger stations across Northern America enables the precise sub-arcsecond localization of multiple FRBs per...
The future of very low frequency radio astronomy lies on the Moon, where the absence of an ionosphere and terrestrial radio interference enables observations below ~30 MHz. The upcoming LuSEE-Night mission will deploy four monopole antennas on the lunar farside to measure the global signal from the Epoch of Reionization and coherent emission from exoplanets. Before scientific measurements are...
4U 1556-60 is an X-ray binary that was discovered more than 50 years ago as a persistent X-ray source. However, very little was known about it, including fundamental properties such as its distance, whether the accreting compact object was a black hole or neutron star, and its orbital period. Recently, Gaia Data Release 3 has provided a parallax for the optical counterpart of 4U 1556-60,...
GRS 1915+105, the low mass X-ray binary with the largest accretion disk and the first microquasar observed with superluminal jets, has stayed in a high-luminosity outburst for decades since its discovery in 1992. However, in mid 2018, the source entered a new phase in which the X-rays suddenly dropped to an unprecedentedly low flux that was quickly followed by a rebrightening in the radio,...
