Results 191 to 200 of about 5,123 (230)

SPICA: A 3.5m space infrared telescope for mid- and far-infrared astronomy

Advances in Space Research, 2005
Abstract The Space Infrared Telescope for Cosmology and Astrophysics (SPICA) mission is a Japanese astronomical infrared satellite project optimized for mid- to far-infrared observations. It will be launched at ambient temperature and cooled down on orbit by mechanical coolers on board with an efficient radiative cooling system, a combination of ...
Takashi Onaka, Takao Nakagawa
exaly   +2 more sources

The upGREAT heterodyne array receivers for far Infrared astronomy

2014 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014
C Risacher, Patrick Putz, Alexei Semenov   +2 more
exaly   +2 more sources

A far-infrared polarimeter for balloon astronomy

Infrared Physics, 1978
Abstract We have developed a liquid helium cooled far-infrared polarimeter, designed for astronomical observations with the Imperial College 41 in. balloon telescope.
D.L. Rosen, R.D. Joseph
openaire   +1 more source

Mid- and far-infrared astronomy mission SPICA

Advances in Space Research, 2007
Abstract We present an overview and the current status of SPICA (Space Infrared Telescope for Cosmology and Astrophysics), which is an astronomical mission with a cryogenically cooled 3.5 m telescope optimized for mid- and far-infrared astronomy. Because of its high spatial resolution and unprecedented sensitivity in the mid- to far-infrared, SPICA ...
Takao Nakagawa, Hiroshi Murakami
openaire   +1 more source

Submillimeter and Far-Infrared Observing Platforms for Astronomy

2001
During the next decade several airborne and space-borne platforms for far-infrared and submillimeter astronomy and spectroscopy will become operational These observatories will provide sensitivity and spatial resolution several times better than previous missions.
Hübers, H.-W., Röser, H. P.
openaire   +2 more sources

Filters for Far Infrared Astronomy

1972
In developing far infrared photometers for astronomical purposes one of the main problems is the efficient spectral filtering of the radiation. As a consequence of the unknown spectral distribution of the usually weak radiation of the objects, the filterbands must have a high transmission with steep edges; in addition a specified spectral band and ...
J. J. Wijnbergen, W. H. Moolenaar, G. De Groot   +2 more
openaire   +1 more source

A discussion on infared astronomy - A far infrared sky survey

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1969
Abstract A balloon-borne instrument for making far infrared sky surveys with 2° angular resolution is described. In two initial flights at a wavelength of 320 μm approximately half of the celestial sphere including most of the northern milky way was surveyed. The thermal emission of the moon was alone detected.
N. J. Woolf, W. F. Hoffman, C. L. Frederick, F. J. Low   +3 more
openaire   +1 more source

The Potential for Far-infrared Astronomy in Australia

Publications of the Astronomical Society of Australia, 1982
Despite its superb optical and radio observatories, Australia is essentially blind to the entire submillimeter and far-infrared spectrum. The importance of this spectral region can perhaps best be illustrated by reference to Figure 1, which shows the flux of the galaxy NGC253 as a function of frequency.
openaire   +1 more source

Far-infrared stellar astronomy

Symposium - International Astronomical Union, 1966
The photometer with which I am presently observing stellar radiation responds in the wavelength band extending from 8 to 14 microns. I believe common usage places the boundary between the intermediate and far infrared at 10 microns. From the title of this paper one may therefore infer that what I say today is at least one-third wrong from the start.
openaire   +1 more source

GaAs homojunction far-infrared detectors for astronomy applications

SPIE Proceedings, 1998
ABSTRACT A high performance, bias tunable, p-GaAs homojunction interfacial workfunction internal photoemission (HI-WIP) far-infrared (FIR) detector has been demonstrated. A responsivity of 3.10 0.05 A/W, a quantum efficiencyof 12.5 %, and a detectivity D* of 5.9x10'° cmv'ii/W (NEP of 4.4x10'3 W/v"i), were obtained at 4.2K, forcutoff wavelengths from 80
A. G. Unil Perera, W. Z. Shen, M. H. Francombe, Mark A. Shure, Hui C. Liu, Margaret Buchanan, William J. Schaff   +6 more
openaire   +1 more source