Results 21 to 30 of about 4,545 (163)

The Mauna Kea Observatories Near‐Infrared Filter Set. II. Specifications for a NewJHKL′M′ Filter Set for Infrared Astronomy [PDF]

Publications of the Astronomical Society of the Pacific, 2002
We present a description of a new 1--5 $ $m filter set similar to the long-used JHKLM filter set derived from that of Johnson. The new Mauna Kea Observatories Near-Infrared (MKO-NIR) filter set is designed to reduce background noise, improve photometric transformations from observatory to observatory, provide greater accuracy in extrapolating to zero ...
Tokunaga, A., Simons, D., Vacca, W.
openaire   +3 more sources

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

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

Background-limited Imaging in the Near Infrared with Warm InGaAs Sensors: Applications for Time-domain Astronomy [PDF]

The Astronomical Journal, 2019
Abstract We describe test observations made with a customized 640 × 512 pixel indium gallium arsenide (InGaAs) prototype astronomical camera on the 2.5 m DuPont telescope. This is the first test of InGaAs as a cost-effective alternative to HgCdTe for research-grade astronomical observations. The camera exhibits a background of 113 e– s–1/
Robert A. Simcoe, Gábor Fűrész, Peter W. Sullivan, Tim Hellickson, Andrew Malonis, Mansi Kasliwal, Stephen A. Shectman, Juna A. Kollmeier, Anna Moore   +8 more
openaire   +3 more sources

Development of a Monitoring System for an Infrared Camera [PDF]

Journal of Astronomy and Space Sciences, 2006
The KASINICS (KASI Near-Infrared Camera System) is a ground-based instrument developed by the Korea Astronomy and Space Science Institute (KASI). We developed a temperature and vacuum monitoring system for operating the KASINICS.
Sang-Mok Cha, Bongkon Moon, Ho Jin, In-Soo Yuk, Uk-Won Nam, Sungho Lee, Yungsik Park, Seounghyun Cho, Seungwon Mok, Chun-Hwey Kim   +9 more
doaj   +1 more source

First tests of a 1 megapixel near-infrared avalanche photodiode array for ultra-low background space astronomy

X-Ray, Optical, and Infrared Detectors for Astronomy X, 2022
Spectroscopy of Earth-like exoplanets and ultra-faint galaxies are priority science cases for the coming decades. Here, broadband source flux rates are measured in photons per square meter per hour, imposing extreme demands on detector performance, including dark currents lower than 1 e-/pixel/kilosecond, read noise less than 1 e-/pixel/frame, and ...
Claveau, Charles-Antoine, Bottom, Michael, Jacobson, Shane, Hodapp, Klaus, Walk, Aidan, Loose, Markus, Baker, Ian, Zemaityte, Egle, Hicks, Matthew, Barnes, Keith, Powell, Richard, Bradley, Ryan, Moore, Eric   +12 more
openaire   +2 more sources

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

The Second and Third Data Releases from the UKIRT Hemisphere Survey

The Astronomical Journal
This paper describes the second and third data releases (DR2 and DR3, respectively) from the ongoing United Kingdom Infrared Telescope Hemisphere Survey (UHS).
Adam C. Schneider, Frederick J. Vrba, Justice Bruursema, Jeffrey A. Munn, Mike Irwin, Mike Read, Watson Varricatt, Tom Kerr, Klaus Hodapp, Simon Dye, Stephen J. Williams, Andrew T. Cenko, Trudy M. Tilleman, Marc A. Murison, Barry Rothberg, Scott Dahm, Bryan Dorland, Andy Lawrence, Kenneth C. Chambers   +18 more
doaj   +1 more source

How Massive Star Clusters Form and Evolve: A Near-IR Survey of the W51 Complex

The Astronomical Journal
We present near-infrared JHK _s and narrowband H _2 (1–0) photometric observations of the W51A region, obtained with GTC EMIR, aiming to characterize its young stellar population, and provide mass estimates for individual cluster members and the ...
Aden Dawson, Adam Ginsburg, Carlos G. Román-Zúñiga   +2 more
doaj   +1 more source

Hydration Features on Near-Earth Objects: Integrating New Data with Prior Results

The Planetary Science Journal
Near-Earth objects (NEOs) are excellent laboratories for testing processes that affect airless bodies, as well as informing us about solar system history. Though most NEOs are nominally anhydrous because they formed inside the solar system frost line and
L. E. McGraw, C. A. Thomas, J. P. Emery, A. S. Rivkin   +3 more
doaj   +1 more source