Kavli Affiliate: Daniel R. Wilkins | Summary:Ark 564 is an extreme high-Eddington Narrow-line Seyfert 1 galaxy, known for being one of the brightest, most rapidly variable soft X-ray AGN, and for having one of the lowest temperature coronae. Here we present a 410-ks NuSTAR observation and two 115-ks XMM-Newton observations of this unique source, which […]
Kavli Affiliate: Maria Monzani | Summary:The fundamental nature of Dark Matter is a central theme of the Snowmass 2021 process, extending across all frontiers. In the last decade, advances in detector technology, analysis techniques and theoretical modeling have enabled a new generation of experiments and searches while broadening the types of candidates we can pursue. […]
Kavli Affiliate: Roger W. Romani | First 5 Authors: Martijn de Vries, Roger W. Romani, Oleg Kargaltsev, George Pavlov, Bettina Posselt | Summary: We have collected a new deep {it Chandra X-ray Observatory} ({it CXO}) exposure of PSR B2224+65 and the `Guitar Nebula’, mapping the complex X-ray structure. This is accompanied by a new {it […]
Kavli Affiliate: J. Todd Hoeksema | Summary:We investigate the cross-calibration of the Hinode/SOT-SP and SDO/HMI instrument meta-data, specifically the correspondence of the scaling and pointing information. Accurate calibration of these datasets gives the correspondence needed by inter-instrument studies and learning-based magnetogram systems, and is required for physically-meaningful photospheric magnetic field vectors. We approach the problem […]
Kavli Affiliate: Igor Moskalenko | First 5 Authors: The Fermi-LAT collaboration, :, Marco Ajello, Luca Baldini, Jean Ballet | Summary: An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi-Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on […]
Kavli Affiliate: Vahe Petrosian | Summary:An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi-Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on 12 years of E>50 MeV gamma-ray data, where the spectral parameters, spectral energy distributions (SEDs), […]
Kavli Affiliate: Laura Schaefer | First 5 Authors: Kaveh Pahlevan, Laura Schaefer, Linda T. Elkins-Tanton, Steven J. Desch, Peter R. Buseck | Summary: The deuterium-to-hydrogen (D/H or 2H/1H) ratio of Martian atmospheric water (~6x standard mean ocean water, SMOW) is higher than that of known sources, requiring planetary enrichment. A recent measurement by NASA’s Mars […]
Kavli Affiliate: Keith L. Thompson | First 5 Authors: Benjamin Westbrook, Christopher Raum, Shawn Beckman, Adrian T. Lee, Nicole Farias | Summary: LiteBIRD is a JAXA-led strategic large-class satellite mission designed to measure the polarization of the cosmic microwave background and Galactic foregrounds from 34 to 448 GHz across the entire sky from L2 in […]
Kavli Affiliate: Keith L. Thompson | First 5 Authors: Benjamin Westbrook, Christopher Raum, Shawn Beckman, Adrian T. Lee, Nicole Farias | Summary: LiteBIRD is a JAXA-led strategic large-class satellite mission designed to measure the polarization of the cosmic microwave background and Galactic foregrounds from 34 to 448 GHz across the entire sky from L2 in […]