scholarly journals A Novel Technique for Wide-Field Polarimetry with a Radio Telescope Array

2006 ◽  
Vol 131 (1) ◽  
pp. 648-653 ◽  
Author(s):  
D. McConnell ◽  
E. Carretti ◽  
R. Subrahmanyan
Keyword(s):  
Radio Telescope ◽  
Wide Field ◽  
Telescope Array ◽  
Novel Technique

Electroforming In Space And Ground Telescopes

2020 ◽  
Author(s):  
Valsecchi Giuseppe
Keyword(s):  
Radio Telescope ◽  
Grazing Incidence ◽  
Space Telescopes ◽  
Telescope Array ◽  
X Ray ◽  
Electroforming Process ◽  
Space Agency ◽  
Thin Nickel ◽  
Grazing Incidence Optics ◽  
Italian Space Agency

In the last 25 years, electroforming process has been extensively optimized to produce grazing incidence optics for the X-ray space telescopes, enabling the renown observatories Beppo-SAX for the Italian Space Agency, SWIFT for NASA, XMM Newton for ESA, eROSITA for MPE. These optics are made of thin Nickel mirrors that are grown by electroforming process in an electrolytic bath on a Gold coated mandrel.Electroforming has also been adopted for production of large reflector panels for sub-millimeter radio telescope applications. Between 2006 and 2016, 3000 mirror panels for 25 antennas of the ALMA radio-telescope array of ESO and 1600 mirror panels for the 50-m diameter Large Millimeter Telescope (LMT) “Alfonso Serrano” of INAOE were designed, produced and tested.

Building a decametric radio telescope array

2019 ◽  
Vol 14 (08) ◽  
pp. P08022-P08022
Author(s):  
A. Alhameed ◽  
M. Abdelsalam ◽  
D. Nouichi ◽  
I. Fernini ◽  
H. Al Naimiy ◽  
...  
Keyword(s):  
Radio Telescope ◽  
Telescope Array

scholarly journals Search for radio emission from the exoplanets Qatar-1b and WASP-80b near 150 MHz using the giant metrewave radio telescope

2020 ◽  
Vol 500 (1) ◽  
pp. 211-214
Author(s):  
D A Green ◽  
N Madhusudhan
Keyword(s):  
Radio Emission ◽  
Radio Source ◽  
Radio Telescope ◽  
Magnetic Moments ◽  
Wide Field ◽  
Extragalactic Radio Source ◽  
Field Surveys ◽  
Very Large Array ◽  
Sky Survey ◽  
Cross Match

ABSTRACT We present radio observations made towards the exoplanets Qatar-1b and WASP-80b near 150 MHz with the Giant Meterwave Radio Telescope (GMRT). These targets are relatively nearby irradiated giant exoplanets, a hot Jupiter and a hot Saturn, with sizes comparable to Jupiter but different masses and lower densities. Both the targets are expected to host extended H/He envelopes like Jupiter, with comparable or larger magnetic moments. No radio emission was detected from these exoplanets, with 3σ limits of 5.9 and 5.2 mJy for Qatar-1b and WASP-80b, respectively, from these targeted observations. These are considerably deeper limits than those available for exoplanets from wide-field surveys at similar frequencies. We also present archival Very Large Array (VLA) observations of a previously reported radio source close to 61 Vir (which has three exoplanets). The VLA observations resolve the source, which we identify as an extragalactic radio source, i.e. a chance association with 61 Vir. Additionally, we cross-match a recent exoplanet catalogue with the TIFR GMRT Sky Survey ADR1 radio catalogue, but do not find any convincing associations.

An optical design of the telescope in the Wide Field of View Cherenkov/Fluorescence Telescope Array

2015 ◽  
Vol 67 ◽  
pp. 8-17 ◽  
Author(s):  
Jiali Liu ◽  
Rui Yang ◽  
Gang Xiao ◽  
Zhen Cao ◽  
Lingling Ma ◽  
...  
Keyword(s):  
Optical Design ◽  
Field Of View ◽  
Wide Field ◽  
Telescope Array ◽  
Wide Field Of View

scholarly journals A new pulsar instrumentation at the Allen Telescope Array and the Nancay Radio Telescope

2011 ◽  
Author(s):  
G. Desvignes ◽  
W. C. Barott ◽  
I. Cognard ◽  
P. Lespagnol ◽  
G. Theureau ◽  
...  
Keyword(s):  
Radio Telescope ◽  
Telescope Array
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