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astro-ph.IM2026

The Balloon-borne VLBI Experiment (BVEX) Radio Telescope and Position Tracking System

Felix M. Thiel, Mayukh Bagchi, Laura M. Fissel +17

Very Long Baseline Interferometry (VLBI) is a technique in radio astronomy that vastly increases the diffraction limited angular resolution of radio observations by correlating sim…

astro-ph.IM2026

An RFSoC-based Backend and Timing System for the Balloon-borne Very Long Baseline Interferometry Experiment

Mayukh Bagchi, Felix M. Thiel, Laura M. Fissel +13

We present the design and performance characterization of the digital backend and precision-timing system for the Balloon-borne Very Long Baseline Interferometry Experiment (BVEX),…

astro-ph.IM2026

First Very Long Baseline Interferometry Fringe Detection at 690GHz

Ming-Tang Chen, Geoffrey B. Crew, Dan Bintley +42

We report the first very long baseline interferometry (VLBI) experiment conducted in the 690 GHz atmospheric window. On 2024 November 21, observations with the Atacama Large Millim…

astro-ph.IM2026

Optical Flashes from Beam-Driven Light Sails with the Roman, Rubin and Euclid Observatories

James Guillochon, Abraham Loeb

The primary challenge of rocket propulsion is the burden of accelerating the spacecraft's own fuel. Light sails leave the propellant at home, with the achievable speed set by the s…

astro-ph.IM2026

The MegaWave Radio Surveyor

T. Joseph W. Lazio, Evgenya Shkolnik, James Aguirre +40

Several Decadal-level questions in astrophysics, exoplanets, astrobiology, and cosmology can be addressed only at low radio frequencies inaccessible from Earth. The MegaWave Radio…

astro-ph.IM2026

Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory

Courtney D. Dressing, Danica Adams, Evelyne Alecian +324

The Habitable Worlds Observatory (HWO) is a future NASA flagship mission concept identified by the Astro2020 Decadal Survey as the highest priority for large space missions. HWO sh…

astro-ph.IM2026

Design and Performance of 220 and 270 GHz Bandpass Filters for BICEP Array

A. Steiger, The BICEP/Keck Collaboration, P. A. R. Ade +90

The BICEP Array (BA) is the latest in the BICEP/ Keck series of experiments that aim to measure the polarization of the cosmic microwave background (CMB) with small aperture polari…

astro-ph.IM2026

Optical design of VIPER: a high-resolution multimode fiber-fed VIPA spectrograph for characterizing exoplanet atmospheric escape

Matthew C. H. Leung, David Charbonneau, Andrew Szentgyorgyi +1

We present the optical design of VIPER: a high-resolution, multimode fiber-fed, narrowband, cross-dispersed, seeing-limited spectrograph based on a Virtually Imaged Phased Array (V…

astro-ph.IM2026

Multifrequency Synthesis via CHIBI: Colorful Hierarchical Interferometric Bayesian Imaging

Erandi Chavez, Paul Tiede, Sara Issaoun +4

From magnetized plasma of relativistic jets to dust grains within protoplanetary disks, we study the emission mechanisms of radio sources via their rich spectral structure. Multifr…

astro-ph.IM2026★ 14 cited

The Vera C. Rubin Observatory Data Preview 1

Vera C Rubin Observatory Team, Tatiana Acero Cuellar, Emily Acosta +325

We present Rubin Data Preview 1 DP1, the first data from the NSF DOE Vera C Rubin Observatory, comprising raw and calibrated single epoch images, coadds, difference images, detecti…

astro-ph.IM2026

Spectral Map Making with SPHEREx

Ari J. Cukierman, Shuang-Shuang Chen, Jae Hwan Kang +24

We present map-making methodologies and preliminary spectral data cubes for SPHEREx, a NASA Explorer mission that launched in March 2025 and has been performing an all-sky near-inf…

astro-ph.IM2026★ 4 cited

Spectral response of SPHEREx

Howard Hui, Jamie Bock, Samuel Condon +31

The Spectro Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer (SPHEREx) is conducting the first all-sky near infrared spectral survey spanning 0.…

astro-ph.IM2025

Finding New Debris Discs at Sub-millimetre Wavelengths

Mark Booth, Patricia Luppe, Sebastian Marino +9

Debris discs reveal the architectures and dynamical histories of planetary systems. Sub-millimetre observations trace large dust grains within debris discs, revealing their bulk pr…

astro-ph.IM2025

The Future of Evolved Planetary Systems

Roberto Raddi, Anna F. Pala, Alberto Rebassa-Mansergas +19

Understanding the formation, evolution, and chemical diversity of exoplanets are now central areas of astrophysics research. White dwarfs provide a uniquely sensitive laboratory fo…

astro-ph.IM2025★ 33 cited

The SPHEREx Satellite Mission

James J. Bock, Asad M. Aboobaker, Joseph Adamo +111

SPHEREx, a NASA explorer satellite launched on 11 March 2025, is carrying out the first all-sky near-infrared spectral survey. The satellite observes in 102 spectral bands from 0.7…

astro-ph.IM2025★ 3 cited

The automation of optical transient discovery and classification in Rubin-era time-domain astronomy

Nabeel Rehemtulla, Michael W. Coughlin, Adam A. Miller +1

Robotic wide-field time-domain surveys, such as the Zwicky Transient Facility and the Asteroid Terrestrial-impact Last Alert System, capture dozens of transients each night. The wo…

astro-ph.IM2025

AMKID -- a large KID-based camera at the APEX telescope

N. Reyes, A. Weiss, S. J. C. Yates +26

The thermal emission at sub-millimeter wavelengths carries unique information in many astronomical applications ranging from disks and planet formation around young stars, to galax…

astro-ph.IM2025

Design and Performance of the Upgraded Prototype Schwarzschild-Couder Telescope Camera Module

Giovanni Ambrosi, Carla Aramo, Mattia Barbanera +54

The Cherenkov Telescope Array Observatory (CTAO) is a ground-based observatory that will improve upon the sensitivities of the current generation of very-high-energy gamma-ray inst…

astro-ph.IM2025

Towards direct imaging and orbital parameter estimation of supermassive black hole binaries with spaceborne VLBI

B. Hudson, L. I. Gurvits, E. Mooij +2

Direct observation of the orbital motion of a sub-parsec supermassive black hole binary (SMBHB) would provide the first conclusive electromagnetic proof of such systems existing. W…

astro-ph.IM2025

Braginskii Viscosity in Cosmological Simulations of Galaxy Clusters: Implementation, Validation, and First Application

Tirso Marin-Gilabert, Ulrich P. Steinwandel, Milena Valentini +2

We present the implementation of an anisotropic viscosity solver within the magnetohydrodynamics (MHD) framework of the TreeSPH code OpenGadget3. The solver models anisotropic visc…

astro-ph.IM2025

Extracting latent representations from X-ray spectra. Classification, regression, and accretion signatures of Chandra sources

Nicolò Oreste Pinciroli Vago, Juan Rafael Martínez-Galarza, Roberta Amato

Spectral signatures are crucial in the era of large X-ray surveys. Automatic machine learning methods have proven useful in this respect, but so far they have not been applied to l…

astro-ph.IM2025

An Efficient Shift-and-Stack Algorithm Applied to Detection Catalogs

Steven Stetzler, Mario Jurić, Pedro H. Bernardinelli +22

The boundary of solar system object discovery lies in detecting its faintest members. However, their discovery in detection catalogs from imaging surveys is fundamentally limited b…

astro-ph.IM2025★ 3 cited

A simple, flexible method for timing cross-calibration of space missions

Matteo Bachetti, Yukikatsu Terada, Megumi Shidatsu +25

The timing (cross-)calibration of astronomical instruments is often done by comparing pulsar times-of-arrival (TOAs) to a reference timing model. In high-energy astronomy, the choi…

astro-ph.IM2025

On the synergetic use of Ariel and JWST for exoplanet atmospheric science

Quentin Changeat, Pierre-Olivier Lagage, Giovanna Tinetti +27

This paper explores the potential for strategic synergies between the JWST and the Ariel telescopes, two flagship observatories poised to revolutionise the study of exoplanet atmos…