Results 161 to 170 of about 101,515 (208)

New balloon-borne telescope for far-infrared astronomy

SPIE Proceedings, 2000
We have developed the new balloon-borne telescope, Far Infrared Balloon-Borne Experiment (FIRBE), to survey the far-infrared radiations of star-forming regions. The primary mirror is an offset parabolid with a diameter of 50 cm (F/2) and telescope structure is made from Carbon Fiber Reinforced Plastics to lighten the whole telescope and hold the strain
Seiko Arimura, Hiroshi Shibai, Mitsunobu Kawada, Atsushi Ito, Makoto Tanaka, Shinya Hirooka, Yasuo Doi, Takao Nakagawa, Masanao Narita, Hidehiro Kaneda, Masahiro Tanaka, Takanao Tohya, Shin'ichiro Makiuti, Yoshihiko Okamura, Haruyuki Okuda, T. N. Rengarajan   +15 more
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

Bolometers for far-infrared and submillimetre astronomy

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
Department of Physics, Queen Mary and Westfield College, Mile End Road, London E1 4NS, UK Received 31 August 1999; Available online 19 April 2000. Abstract Important scientific goals of far-infrared and submillimetre astronomy include measurements of anisotropies in the cosmic background radiation, deep imaging surveys for detection of high-red ...
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

Development of GaAs photoconductors for far-infrared/submillimeter astronomy

SPIE Proceedings, 2004
In today's Astronomy, there is little observational results in the spectral window ranging from far-infrared to submillimeter wavelength. As one of the main reason of this, there is no high performance detector in this spectral region. We started the development of the extrinsic photoconductor for this region utlizing shallow donor levels of gallium ...
Kentaroh Watanabe, Hiroshi Murakami, Takuro Ohata, Moriaki Wakaki, Osamu Abe   +4 more
openaire   +1 more source

Lumped element kinetic inductance detectors for far-infrared astronomy

SPIE Proceedings, 2008
We describe a new type of FIR detector based on lumped element superconducting resonators (LEKIDs). Thesedevices can act as distributed FIR radiation absorbers without the need for an additional coupling structure.In addition, these devices can be integrated into a compact filled array geometry with high filling factor.
Simon Doyle, Jack Naylon, Philip Mauskopf, Adrian Porch, Stafford Withington, David Goldie, Dorota M. Glowacka, Jochem J. A. Baselmans, Stephen J. C. Yates, Henk Hoevers   +9 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

An array photometer for air-borne far infrared astronomy

Astrophysics and Space Science, 1985
We describe here a far-infrared photometer capable of detecting simultaneously in three bands in the region 20–120 microns, each band having an array of 3 or 4 photoconductive detectors. We present and discuss its laboratory performance and the results obtained on the planet Venus during an air-borne observational programme using a 32.5 cm telescope ...
P. B. Van Der Wal, B. G. Anandarao, D. Rouan, P. Léna, M. De Muizon, J. Wijnbergen   +5 more
openaire   +1 more source

SPICA mission for mid- and far-infrared astronomy

SPIE Proceedings, 2008
SPICA (Space Infrared Telescope for Cosmology and Astrophysics) is an astronomical mission optimized for mid- and far-infrared astronomy with a cryogenically cooled 3.5 m telescope. Its high spatial resolution and unprecedented sensitivity in the mid- and far-infrared will enable us to address a number of key problems in present-day astronomy ...
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