New telescopes for ground-based solar observations at sub-millimeter and mid-infrared

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dc.contributor.authorKaufmann P.
dc.contributor.authorLevato H.
dc.contributor.authorCassiano M.M.
dc.contributor.authorCorreia E.
dc.contributor.authorCosta J.E.R.
dc.contributor.authorDe Castro C.G.G.
dc.contributor.authorGodoy R.
dc.contributor.authorKingsley R.K.
dc.contributor.authorKingsley J.S.
dc.contributor.authorKudaka A.S.
dc.contributor.authorMarcon R.
dc.contributor.authorMartin R.
dc.contributor.authorMarun A.
dc.contributor.authorMelo A.M.
dc.contributor.authorPereyra P.
dc.contributor.authorRaulin J.-P.
dc.contributor.authorRose T.
dc.contributor.authorValio A.S.
dc.contributor.authorWalber A.
dc.contributor.authorWallace P.
dc.contributor.authorYakubovich A.
dc.contributor.authorZakia M.B.
dc.date.accessioned2024-03-13T01:36:40Z
dc.date.available2024-03-13T01:36:40Z
dc.date.issued2008
dc.description.abstractThe solar submillimeter-wave telescope (SST) is the only one of its kind dedicated to solar continuous observations. Two radiometers at 0.740 mm (405 GHz), and four at 1.415 mm (212 GHz) are placed in the Cassegrain focal plane of the 1.5-m dish at El Leoncito high altitude site, San Juan, Argentina. The aperture efficiencies are close to design predictions: 20% and 35% for 2 and 4 arcminutes beam sizes at 405 and 212 GHz, respectively. The positioner absolute pointing accuracy is 10 arcseconds. Spectral coverage is complemented by ground-based mid-infrared telescopes developed for high cadence observations in the continuum 10 micron band (30 THz), using small apertures and roomtemperature microbolometer cameras. Using the system, a new solar burst spectral component was discovered, exhibiting fluxes increasing for smaller wavelengths, separated from the well known microwave component. Rapid subsecond pulsations are common for all bursts. The pulsations onset times of appear to be connected to the launch times of CMEs. Active regions are brighter for shorter submillimeter-waves. Mid-IR bright regions are found closely associated with calcium plages and magnetic structures near the solar photosphere. Intense and rapid 10 micron brightening was detected on active centers in association with weak flares. These results raise challenging difficulties for interpretation.
dc.description.volume7012
dc.identifier.doi10.1117/12.788889
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37471
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineering
dc.rightsAcesso Restrito
dc.subject.otherlanguageMid-IR solar photometers
dc.subject.otherlanguageSolar flares
dc.subject.otherlanguageSubmm-waves telescopes
dc.titleNew telescopes for ground-based solar observations at sub-millimeter and mid-infrared
dc.typeArtigo de evento
local.scopus.citations38
local.scopus.eid2-s2.0-66749122523
local.scopus.subject10 micron
local.scopus.subjectActive center
local.scopus.subjectActive regions
local.scopus.subjectAperture efficiency
local.scopus.subjectArgentina
local.scopus.subjectBeam size
local.scopus.subjectContinuous observation
local.scopus.subjectFocal Plane
local.scopus.subjectGround based
local.scopus.subjectHigh altitude
local.scopus.subjectMicrobolometer
local.scopus.subjectMicrowave components
local.scopus.subjectMid-IR solar photometers
local.scopus.subjectMidinfrared
local.scopus.subjectPointing accuracy
local.scopus.subjectRoom temperature
local.scopus.subjectSmall aperture
local.scopus.subjectSolar flares
local.scopus.subjectSolar observations
local.scopus.subjectSolar photosphere
local.scopus.subjectSpectral components
local.scopus.subjectSpectral coverage
local.scopus.subjectSubmillimeter
local.scopus.subjectSubmillimeter-wave telescopes
local.scopus.subjectSubmm-waves telescopes
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=66749122523&origin=inward
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