The fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) between 2008 August 4 and 2016 August 2 contains 2863 objects located at high Galactic latitudes ...

The radio source 3C 264, hosted by the giant elliptical galaxy NGC 3862, was observed with VERITAS between February 2017 and May 2019. These deep observations resulted in the discovery of very-high-energy (VHE; E >100 GeV) ...

This Letter of Intent describes the motivation for the continued development of double-sided silicon strip detectors (DSSDs). Silicon detectors have a long history of groundbreaking measurements in astroparticle physics, ...

Magnetars are the most highly magnetized neutron stars in the cosmos (with magnetic field 10¹³–10¹⁵ G). Giant flares from magnetars are rare, short-duration (about 0.1 s) bursts of hard X-rays and soft γ rays1,2. Owing to ...

Although the advent of ever-larger and more sensitive telescopes in the coming decade will reveal correspondingly fainter, more distant galaxies, a question will persist: what more is there that these telescopes cannot ...

Astrophysical measurements away from the 1 AU orbit of Earth can enable several astrophysical science cases that are challenging or impossible to perform from Earthbound platforms, including: building a detailed understanding ...

HIRMES is a third generation SOFIA instrument designed to cover the gap in the middle infrared region with a broad range of spectra resolution from very low (300-600) to high resolving power of 10⁵ . With its high ...

We discuss a systematic effect associated with measuring polarization with a continuously rotating half-wave plate (HWP). The effect was identified with the data from the E and B Experiment, which was a balloon-borne instrument ...

We report on the development of a polarization-sensitive dichroic (150/220 GHz) detector array for the Cosmology Large Angular Scale Surveyor (CLASS) delivered to the telescope site in June 2019. In concert with existing ...

EBEX was a long-duration balloon-borne experiment to measure the polarization of the cosmic microwave background. The experiment had three frequency bands centered at 150, 250, and 410 GHz and was the first to use a ...