Results 51 to 60 of about 3,030,245 (218)

The SPIRou wavelength calibration for precise radial velocities in the near infrared [PDF]

Astronomy & Astrophysics, 2021
Aims. SPIRou is a near-infrared (nIR) spectropolarimeter at the CFHT, covering the YJHK nIR spectral bands (980−2350 nm). We describe the development and current status of the SPIRou wavelength calibration in order to obtain precise radial velocities ...
M. Hobson, F. Bouchy, N. Cook, É. Artigau, C. Moutou, Isabelle Boisse, C. Lovis, Andrés Carmona, X. Delfosse, J. Donati   +9 more
semanticscholar   +1 more source

Superconducting Microwave Resonator Arrays for Submillimeter/Far-infrared Imaging [PDF]

, 2012
Superconducting microwave resonators have the potential to revolutionize submillimeter and far-infrared astronomy, and with it our understanding of the universe.
Noroozian, Omid
core   +1 more source

Toward Measuring the Microlensing Event Rate in the Galactic Center. I. Event Detection from the UKIRT Microlensing Survey Data

The Astrophysical Journal Supplement Series, 2023
To overcome the high optical extinction, near-infrared (NIR) observations are needed for probing the microlensing events toward the Galactic center. The 2015–2019 UKIRT microlensing survey toward the Galactic center is the first dedicated precursor NIR ...
Yongxin Wen, Weicheng Zang, Bo Ma
doaj   +1 more source

Recent developments in superconducting tunnel junctions for ultraviolet, optical & near infrared astronomy [PDF]

Astronomy and Astrophysics Supplement Series, 1998
Some recent results associated with the development of tantalum based photon counting superconducting tunnel junctions (STJ) suitable for use as broad-band low resolution spectrometers for optical and ultraviolet astronomy are presented. A m square tantalum based STJ, operated at a temperature of 0.3 K, has demonstrated a limiting resolution of  nm at ...
T. Peacock, P. Verhoeve, N. Rando, C. Erd, M. Bavdaz, B. G. Taylor, D. Perez   +6 more
openaire   +1 more source

Near-infrared Polarization Charateristics of the Zodiacal Light Observed with DIRBE/COBE

The Astrophysical Journal, 2023
We report near-infrared polarization of the zodiacal light (ZL) measured from space by the Diffuse Infrared Background Experiment (DIRBE) on board the Cosmic Background Explorer in photometric bands centered at 1.25, 2.2, and 3.5 μ m.
Kohji Takimoto, Shuji Matsuura, Kei Sano, Richard M. Feder   +3 more
doaj   +1 more source

Far-ultraviolet to Near-infrared Observations of SN 2023ixf: A High-energy Explosion Engulfed in Complex Circumstellar Material

The Astrophysical Journal Letters, 2023
We present early-phase panchromatic photometric and spectroscopic coverage spanning the far-ultraviolet to near-infrared regime of the nearest hydrogen-rich core-collapse supernova (SN) in the last 25 yr, SN 2023ixf.
Rishabh Singh Teja, Avinash Singh, Judhajeet Basu, G. C. Anupama, D. K. Sahu, Anirban Dutta, Vishwajeet Swain, Tatsuya Nakaoka, Utkarsh Pathak, Varun Bhalerao, Sudhanshu Barway, Harsh Kumar, Nayana A. J., Ryo Imazawa, Brajesh Kumar, Koji S. Kawabata   +15 more
doaj   +1 more source

New quasars behind the Magellanic Clouds. II. Spectroscopic confirmation of 136 near-infrared selected candidates [PDF]

Astronomy & Astrophysics
Quasi-stellar objects (QSOs) are a basis for an absolute reference system for astrometric studies. A system like this at the far side of nearby galaxies is required to facilitate measuring of the proper motions of these galaxies.
V. Ivanov, M. Cioni, M. Dennefeld, R. de Grijs, J. E. M. Craig, J. V. van Loon, C. Pennock, C. Maitra, F. Haberl   +8 more
semanticscholar   +1 more source

Antenna Effect for Enhanced Near‐Infrared Luminescence in Lanthanide‐Doped Nanoparticles: Mechanisms, Strategies, and Applications

Advances in Materials
Near‐infrared (NIR) luminescent materials hold significance in various sectors, including healthcare, astronomy, environmental monitoring, and information encryption.
Ming Jiang, Jia-Ling Zhou, Xiao Liu, Fan Zhang   +3 more
semanticscholar   +1 more source

Molecular Outgassing in Centaur 29P/Schwassmann–Wachmann 1 during Its Exceptional 2021 Outburst: Coordinated Multiwavelength Observations Using nFLASH at APEX and iSHELL at the NASA-IRTF

The Planetary Science Journal, 2023
The extraordinary 2021 September–October outburst of Centaur 29P/Schwassmann–Wachmann 1 afforded an opportunity to test the composition of primitive Kuiper disk material at high sensitivity.
Nathan X. Roth, Stefanie N. Milam, Michael A. DiSanti, Geronimo L. Villanueva, Sara Faggi, Boncho P. Bonev, Martin A. Cordiner, Anthony J. Remijan, Dominique Bockelée-Morvan, Nicolas Biver, Jacques Crovisier, Dariusz C. Lis, Steven B. Charnley, Emmanuel Jehin, Eva S. Wirström, Adam J. McKay   +15 more
doaj   +1 more source

Alignment of the grating wheel mechanism for a ground-based cryogenic near-infrared astronomy instrument [PDF]

SPIE Proceedings, 2003
We describe the population, optomechanical alignment, and alignment verification of near-infrared gratings on the grating wheel mechanism (GWM) for the Infrared Multi-Object Spectrometer (IRMOS). IRMOS is a cryogenic (80 K), principle investigator-class instrument for the 2.1 m and Mayall 3.8 m telescopes at Kitt Peak National Observatory, and a MEMS ...
Sharon M. Gutkowski, Raymond G. Ohl, Jason E. Hylan, John G. Hagopian, Stephen E. Kraft, J. E. Mentzell, Joseph A. Connelly, Joseph P. Schepis, Leroy M. Sparr, Matthew A. Greenhouse, John W. MacKenty   +10 more
openaire   +1 more source