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The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
(IOP, 2020-04-02)
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 ...
VERITAS Discovery of VHE Emission from the Radio Galaxy 3C 264: A Multi-Wavelength Study
(2020-05-06)
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) ...
Double-Sided Silicon Strip Detectors for Next-Generation Gamma-ray Telescopes
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, ...
High-energy emission from a magnetar giant flare in the Sculptor galaxy
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 ...
Populations behind the source-subtracted cosmic infrared background anisotropies
(American Astronomical Society, 2019-05-31)
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 ...
Opportunities for Astrophysical Science from the Inner and Outer Solar System
(American Astronomical Society, 2019-05-31)
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 – HIgh Resolution Mid-infrarEd Spectrometer for SOFIA
(2019)
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 ...
Intensity-coupled Polarization in Instruments with a Continuously Rotating Half-wave Plate
(IOP, 2019-05-01)
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 ...
The CLASS 150/220 GHz Polarimeter Array: Design, Assembly, and Characterization
(2020-01-07)
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 ...
The EBEX Balloon-borne Experiment—Detectors and Readout
(IOP, 2018-11-06)
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 ...