Results 121 to 130 of about 4,545 (163)

Optimizing photonic ring-resonator filters for OH-suppressed near-infrared astronomy

Applied Optics, 2021
Near-infrared wavelength observations are crucial for understanding numerous fields of astrophysics, such as supernova cosmology and positronium annihilation detection. However, current ground-based observations suffer from an enormous background due to OH emission in the upper atmosphere.
Pufan Liu, David A. Czaplewski, Simon Ellis, Robert Kehoe, Kyler Kuehn, Harold M. Spinka, Nathaniel P. Stern, David G. Underwood, Steve Kuhlmann   +8 more
openaire   +2 more sources

Visual and Near-infrared Astronomy

2021
The first non-electromagnetic messengers from space were discovered in the early 20th century, but it is only now that multimessenger astronomy is coming into its own. The aim of Multimessenger Astronomy in Practice is to aid an astronomer who is new to research in a particular area of multimessenger astronomy.
Gurovich, Sebastian, Payne, Jeffrey L, Filipovic, Miroslav   +2 more
openaire   +2 more sources

A NICMOS-3 based spectrograph for near infrared astronomy

Experimental Astronomy, 1994
We describe a design for a compact cooled spectrograph which incorporates two cameras and two collimators to achieve high throughput from 0.8 to 2.5μm. The spectrograph utilizes multiple NICMOS 3 arrays, specially mounted to minimize their separation in the spectral dimension.
R. J. Rudy, Y. Dotan, D. W. Warren, R. M. Young   +3 more
openaire   +1 more source

Polarization gratings for visible and near-infrared astronomy

SPIE Proceedings, 2014
We report on the development of polarization gratings that can be used for polarimetry and/or high throughput broadband spectroscopy in astronomy. Polarization gratings are able to overcome fundamental limitations on the diffraction efficiency of conventional gratings to provide near 100% diffraction efficiency over a broad bandwidth.
Max Millar-Blanchaer, Dae-Sik Moon, James R. Graham, Michael Escuti   +3 more
openaire   +1 more source

Limitations of ground based near and far infrared astronomy

Infrared Physics, 1975
Abstract The possibilities of ground based infrared astronomy are discussed. It is shown that telescopes used up to now are not optimized and that the Diffraction Limited Detectivity conditions (DLD) cannot be reached, in the near infrared, by the larger telescopes. The maximum useful diameters for near i.r. and far i.r.
G. Dall'Oglio, I. Guidi, B. Melchiorri, F. Melchiorri, V. Natale   +4 more
openaire   +1 more source

DMDs for multi-object near-infrared spectrographs in astronomy

Emerging Digital Micromirror Device Based Systems and Applications X, 2018
The Digital Micromirror Device (DMD), typically used in projection screen technology, has utility in instrumentation for astronomy as a digitally programmable slit in a spectrograph. When placed at an imaging focal plane the device can be used to selectively direct light from astronomical targets into the optical path of a spectrograph, while at the ...
Aidan Gray, Gavin Hope, Devin Conley, Massimo Robberto, Robert Barkhouser, Stephen Hope, Stephen A. Smee   +6 more
openaire   +1 more source

First experiences with a solid ZnSe grism for near infrared astronomy

Experimental Astronomy, 1994
We present engineering data and initial astronomical observations with the solid ZnSe grisms mounted in the MPIA MAGIC infrared camera.
T. M. Herbst, J. T. Rayner
openaire   +1 more source

The SAPHIRA detector: a near-infrared photon counter for astronomy

Advanced Photon Counting Techniques XIII, 2019
The SAPHIRA is currently the only astronomical device capable of counting photons in the NIR while showing other performance easily comparable to the ubiquitous HAWAII arrays. Photon counting was previously only available in astronomy with high dark currents, prohibiting observation of many astronomical targets.
Dani E. Atkinson, Donald N. B. Hall, Shane M. Jacobson, Ian M. Baker   +3 more
openaire   +1 more source