Time-resolved XRISM spectroscopy of NGC 4395 reveals variable inner-disk Fe Kα emission interpreted as Lense-Thirring precession, favoring low black hole mass (~9e3 solar masses) and moderate spin (a≳0.6).
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XRISM observations of Abell 1795 show line-of-sight velocity dispersion falling from 114 km/s in the core to 68 km/s at 320 kpc, near-zero bulk velocities, multiphase gas, and 14% resonant suppression of the Fe XXV w line.
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Candidate 1.97 keV absorption line in HLX 2SXPS J111416.1+481833 interpreted as proton CRSF implying B ~ 4e14 G for a neutron star accretor.
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Deep VERITAS observations detect extended TeV gamma rays from the jet lobes of SS 433, consistent with leptonic acceleration and no central source emission.
Detection of a micronova burst in TESS data of IGR J17014-4306, with inferred burned mass 1.6e-11 solar masses and recurrence time ~20 days, adding the eighth confirmed system.
First blind optical identification of a z=0.153 sub-luminous GRB afterglow with Ic-BL SN, yielding a volumetric rate consistent with on-axis high-luminosity long GRBs.
EP J174942.2-384834 is classified as a very faint X-ray transient black hole candidate based on its hard X-ray spectra, optical/UV brightening correlated with X-rays, and lack of radio emission.
2MASX J0413-0050 transitioned from a narrow-line Seyfert 1 to a Seyfert 1.9 and back while remaining in a high accretion state, supporting classification as a changing-state AGN.
2CXO J0507 is a polar-type magnetic cataclysmic variable featuring a white dwarf with B ≈ 30 MG and an orbital period of 2.34 hours, identified through multiwavelength archival and follow-up data.
New XRISM observations confirm a highly broadened, pulsating Fe K line from the accretion column of Hercules X-1 that varies with pulse phase and evolves with the 35-day precession cycle.
XRISM data show a ~2 keV cooler gas phase with 300-400 km/s dispersion and bulk motion in the central Perseus cluster, distinct from the single-temperature gas beyond 60 kpc.
Image stacking of 57 E+A galaxies shows excess extended light relative to comparison samples, consistent with faint tidal features from small-scale interactions.
Hector IFS and Chandra data indicate a low-luminosity AGN contributes to extended LINER emission in galaxy C901005481609968 despite weak traditional AGN indicators.
New X-ray flare detections from M dwarfs combined with literature data yield flare frequency constraints and an upper limit of 0.5-30 Myr on atmospheric loss times for habitable planets orbiting them.
Multi-wavelength data classify the Einstein Probe transient EP250916a as a faint hard-state black hole X-ray binary candidate.