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- IUP-CO2M-REB-TN-1000 – Requirements Justification Report for anthropogenic CO2 Monitoring Mission (CO2M)
- SRON-CO2M-TN-2018-01 – Multi-Angle Polarimeter Reference Spectra
- SRON-CSS-TN-2021-004 – Cloud Imager Requirement Analysis for the Copernicus CO2 Monitoring mission
- SRON-CSS-TN-2020-001 – Study on Spectral Sizing for CO2 Observations: Executive Summary
- SRON-CSS-TN-2020-002 – Study on Spectral Sizing for CO2 Observations: Final Report
- SRON-ESA-S5L2PP-ATBD-001 – Sentinel 5 L2 Prototype Processors Algorithm Theoretical Baseline Document: Methane Retrieval
- SRON-ESA-S5L2PP-ATBD-002 – Sentinel 5 L2 Prototype Processors Algorithm Theoretical Baseline Document: Carbon Monoxide Retrieval
- SRON-ESG-RP-2021-010 – RemoTAP Algorithm Theoretical Baseline Document
- SRON-ESG-TN-2021-003 – Satellite instruments for CH4 and CO2 hotspot detection
- SRON-TROPSC-TN-2011-002 – Instrument noise model for the Sentinel 5 SWIR bands
An ultra-short-period super-Earth and a sub-Neptune orbiting the K dwarf TOI-4311
01/07/2026 - Exoplanets
We report the discovery and characterization of the multiplanetary system around TOI-4311, a K dwarf kinematically between the Galactic thick disc and Hercules stream. TOI-4311 hosts an ultra-short-period super-Earth (P$sim$0.99 d, $1.376^{+0.077}_{-0.080}$ R$_{oplus }$) and a longer period sub-Neptune (P$sim$15 d, $2.47^{+0.12}_{-0.11}$ R$_{oplus }$) that was first detected in the Transiting Exoplanet Survey Satellite photometry.…
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High-spectral-resolution X-Ray Observations of the Evolved Supermassive Stellar Binary System η Carinae: Fe Kα Band Profile Revealed with XRISM
01/06/2026 - High-Energy
The supermassive binary system, η Carinae, is experiencing enormous wind-driven mass loss at a rate unparalleled in the rest of the Galaxy. Their wind─wind collision (WWC) continuously produces shock heated, X-ray-emitting plasmas. The XRISM X-ray observatory observed the system in 2023 and 2024 when the X-ray emission began to increase toward periastron passage in 2025.…
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XRISM high-resolution X-ray spectroscopy of Cygnus X-1: Orbital and short-term variability of iron absorption
01/06/2026 - High-Energy
We present the first high-resolution spectroscopy of the black hole high-mass X-ray binary Cygnus X-1 with XRISM, including orbital-phase-resolved analyses and tentative evidence of short-term variability in the Fe K band on second timescales. Using data from the Performance Verification phase in 2024 April, we analyzed spectral variability across orbital phases with the Resolve microcalorimeter…
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