Results 81 to 90 of about 2,236,355 (176)

A Highly Magnetic Ultramassive White Dwarf with a 23 minute Rotation Period

open access: yesThe Astrophysical Journal
We present a physical characterization of Tsinghua University-Ma Huateng Telescope for Survey (TMTS) J00063798+3104160 (J0006), a rapidly rotating, ultramassive white dwarf (WD) identified in high-cadence light curves from the TMTS.
Jincheng Guo   +19 more
doaj   +1 more source

Masterworks for band

open access: yes, 2016
Recorded during a live performance at Miller Auditorium, Western Michigan University, Kalamazoo, Michigan, November 17, 1991, 3:00 p.m., the 124th concert of the School of Music’s 1991-1992 season.University Symphonic Band ; Jeffrey Renshaw, conductor ...

core  

Multiple Emission Lines of Hα Emitters at z ∼ 2.3 from the Broad- and Medium-band Photometry in the ZFOURGE Survey

open access: yesThe Astrophysical Journal
We present a multiple emission line study of ∼1300 H α emitters (HAEs) at z ∼ 2.3 in the ZFOURGE survey. In contrast to the traditional spectroscopic method, our sample is selected based on the flux excess in the ZFOURGE K _s broadband data relative to ...
Nuo Chen   +10 more
doaj   +1 more source

XMM-Newton Observation and Optical Monitoring of the Candidate Redback Millisecond Pulsar 1FGL J0523.5-2529

open access: yesThe Astrophysical Journal
1FGL J0523.5−2529 is a Fermi selected redback millisecond pulsar candidate that exhibited luminous optical and X-ray flares in 2020–2021. We obtained a simultaneous X-ray and U -band observation with XMM-Newton in 2025, the first to cover the 16.5 hr ...
Jules P. Halpern, Slavko Bogdanov
doaj   +1 more source

Multiyear Ground-based Survey Photometry of Active Comet 103P/Hartley 2 and Centaur (2060) Chiron: A Tale of Two Comets in the Pre-LSST Era

open access: yesThe Planetary Science Journal
Comets and Centaurs trace the evolution of trans-Neptunian objects (TNOs) into the inner solar system. Their activity reflects the interplay between volatile sublimation, dust dynamics, and, in some cases, ring scattering.
Joseph Murtagh   +24 more
doaj   +1 more source

Measurement of light: errors in broad band photometry

open access: yes, 1993
Broad band photometry is the most widely practiced method of measuring illumination in buildings. Errors in such measurements could occur if the photometer relative spectral responsivity does not exactly match the spectral luminous efficiency of the ...
Ouellette, M. J.
core  

Exploring Quasar Variability with ZTF at 0 < z < 3: A Universal Relation with the Eddington Ratio

open access: yesThe Astrophysical Journal
Quasars, powered by accretion onto supermassive black holes (SMBHs), exhibit significant variability, offering insights into the physics of accretion and the properties of the central engines.
Hygor Benati Gonçalves   +4 more
doaj   +1 more source

University Symphonic Band, February 23, 1997

open access: yes, 2016
Recorded during a live performance at Miller Auditorium, Western Michigan University, Kalamazoo, Michigan, February 23, 1997, 3:00 p.m., the 349th concert of the School of Music's 1996-1997 season.Western Michigan University Symphonic Band, Robert L ...
Western Michigan University. Symphonic Band
core  

Analyzing the Onset of Cometary Activity by the Jupiter-family Comet 2023 RN3

open access: yesThe Astronomical Journal
We utilize serendipitous observations from the Asteroid Terrestrial-impact Last Alert System (ATLAS) and the Zwicky Transient Facility in addition to targeted follow-up observations from the Las Cumbres Observatory (LCO) and Liverpool Telescope to ...
Matthew M. Dobson   +19 more
doaj   +1 more source

The first data release of J-VAR: Multi-filter light curves for 1.3 million point-like sources

open access: yesAstronomy & Astrophysics
Context. The Javalambre VARiability survey (J-VAR) is a multi-filter photometric survey conducted at the Observatorio Astrofísico de Javalambre, covering selected regions of the northern sky, and providing time-domain information for the Javalambre ...
Pyrzas S.   +27 more
doaj   +1 more source

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