Results 31 to 40 of about 256 (175)
The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory
Astronomische Nachrichten, Volume 347, Issue 7, August 2026.ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth +20 more
wiley +1 more source
The jet of the Low Luminosity AGN of M81
EPJ Web of Conferences, 2013 In this contribution, we summarize our main results of a big campaign of global VLBI observations of the AGN in M81 (M81*) phase-referenced to the radio supernova SN 1993J.
Alberdi A. +6 more
doaj +1 more source
An Updated Reference Frame for the Galactic Inner Parsec
The Astrophysical Journal, 2023 Infrared observations of stellar orbits about Sgr A* probe the mass distribution in the inner parsec of the Galaxy and provide definitive evidence for the existence of a massive black hole.
Jeremy Darling +5 more
doaj +1 more source
Earth and Space Science, Volume 13, Issue 8, August 2026.Abstract Unexpectedly following launch, the Lunar Trailblazer mission experienced software anomalies that led it to orient solar panels away from the sun and lose communication with Earth. This paper describes efforts to determine the spacecraft state and attempt recovery of the mission's science at the Moon.
B. L. Ehlmann +28 more
wiley +1 more source
Mission Design and Early Navigation Operations for the Lunar Trailblazer Mission
Earth and Space Science, Volume 13, Issue 7, July 2026.Abstract Lunar Trailblazer is a smallsat mission launched on 27 February 2025 as a secondary payload with the Intuitive Machines IM‐2 mission. After insertion into a near‐polar circular orbit around the Moon, the mission's goal was to search and characterize lunar water, primarily looking for ice in permanently shadowed craters and water bound in ...
Gregory Lantoine +13 more
wiley +1 more source
MERLIN Astrometry of 11 Radio Stars
The Astronomical Journal, 2006 We report accurate positions in the International Celestial Reference Frame (ICRF) for 11 radio stars. Observations were made using the Multi-Element Radio Linked Interferometer Network at a radio frequency of 5 GHz. The positions are estimated to be accurate at the 5 mas level.
Alan L. Fey +5 more
openaire +1 more source
Optical Astrometry of Extragalactic Radio Sources With the Tautenburg Schmidt Telescope [PDF]
Symposium - International Astronomical Union, 1990 Optical positions of objects from the IAU Commission 24 Working Group list of benchmark radio sources have been derived which will contribute to the link of the radio and optical reference frames. Results for 11 objects with an r.m.s. position error of 0.″2 are presented and discussed.
W. R. Dick, I. I. Kumkova
openaire +1 more source
The Astrophysical Journal, 2023 We have observed the low-mass protostellar source IRAS 15398−3359 at a resolution of 0.″2–0.″3, as part of the Atacama Large Millimeter/Submillimeter Array Large Program FAUST, to examine the presence of a hot corino in the vicinity of the protostar.
Yuki Okoda +18 more
doaj +1 more source
Al‐Khadhaf: The first camera‐observed (H5–6) meteorite fall from Oman
Meteoritics &Planetary Science, Volume 61, Issue 3, Page 522-547, March 2026.Abstract A fireball camera system installed in 2022 by the Oman Meteorite Monitoring Project (OMMP) as part of the Global Fireball Observatory (GFO) recorded a 3.2 s fireball on March 8, 2022 at 8:15 p.m. UTC. A meteoroid of 4 ± 2 kg entered the atmosphere at 14.0 km/s.
Anna Zappatini +18 more
wiley +1 more source
The Astrophysical JournalMeasuring plasma parameters in the upper solar corona and inner heliosphere is challenging because of the region’s weakly emissive nature and inaccessibility for most in situ observations.
Peijin Zhang +45 more
doaj +1 more source