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Infrared photometry of AGB stars
Astrophysics and Space Science, 1994The goal of this article is to show that, if one avoids star forming regions, mass-losing AGB stars can generally be selected from the data that will be provided by the near-infrared surveys which are presently considered. Also, if IRAS data are available, the separation between carbon-rich and oxygen-rich stars can be operated by their positions in ...
T. Le Bertre +3 more
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Infrared Photometry of Solar Active Regions
International Astronomical Union Colloquium, 2000AbstractSimultaneous time series of broad-band images of two active regions close to the disk center were acquired at the maximum (0.80μm) and minimum (1.55μm) continuum opacities. Dark faculae are detected in images obtained as weighted intensity differences between both wavelength bands. The elements of quiet regions can be clearly distinguished from
M. Sobotka +4 more
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Infrared photometry of S stars
Astrophysics, 1981Results are given of observations of 13 S stars in Stephenson's catalog (1976) in the range 0.98-2.39 microns. Observations were made with a 2.6-m reflecting telescope using a PbS detector cooled by carbon dioxide. An infrared excess at 1.75 microns is found for some of the stars, and absorption at 2.39 microns is found for all of them.
A. A. Akopyan +3 more
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Infrared photometry of Comet Kohoutek
Icarus, 1974Abstract Before perihelion, the 8.8–21 μm luminosity of Comet Kahoutek (1973f) was on the order of 1021 ergsec−1 and dropped to 1020 ergsec−1 after perihelion.
M. Zeilik, E.L. Wright
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Photometry with Infrared Arrays
International Astronomical Union Colloquium, 1993AbstractInfrared arrays have been in use at a number of observatories for several years. They are more complicated in their construction than optical ones and more problems arise in obtaining good photometry from them. The types of arrays currently available are described together with the observational techniques and the problems encountered in ...
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Astrophysics and Space Science, 1990
Complete infraredJ andK light curves of the RS CVn system XY UMa have been obtained at the beginning of 1989. We point out some interesting morphological changes observed in these light curves.
M. J. Ar�valo, C. L�zaro
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Complete infraredJ andK light curves of the RS CVn system XY UMa have been obtained at the beginning of 1989. We point out some interesting morphological changes observed in these light curves.
M. J. Ar�valo, C. L�zaro
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Saao standards for infrared photometry
Astrophysics and Space Science, 1995I discuss the Infrared standards used at the South African Astronomical Observatory and their comparisons to the other Southern hemisphere Infrared standard systems. The new faint standards suitable for Infrared arrays are also discussed.
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Astrophysics, 1987
The results of UBVRJHKLM photometry of FG Sge made during 1985 are discussed. It follows from analysis of the observations that the spectral class of FG Sge in 1985 corresponded to G(1 +/- 0.5)I; for r = 4.1 kpc, the radius of the star is 95R/sub circle/ and L = 8.9 x 10/sup 3/L/sub circle/
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The results of UBVRJHKLM photometry of FG Sge made during 1985 are discussed. It follows from analysis of the observations that the spectral class of FG Sge in 1985 corresponded to G(1 +/- 0.5)I; for r = 4.1 kpc, the radius of the star is 95R/sub circle/ and L = 8.9 x 10/sup 3/L/sub circle/
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Infrared photometry of eight planetary nebulae
Astronomy Letters, 2007We discuss the infrared (IR) (1.25–5 µm) photometry of eight planetary nebulae performed in 1999–2006. For all of the nebulae under study, we have firmly established IR brightness and color variations on time scales shorter than one year and up to 6–8 years. The greatest IR brightness variations were observed in IC 2149, IC 4997, and NGC 7662.
O. G. Taranova, V. I. Shenavrin
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Infrared photographic photometry with an ‘instant’ film
Journal of Audiovisual Media in Medicine, 1982The use of infrared-sensitive film for making measurements of the infrared reflectance of pigmented lesions has been described previously (Marshall, 1976, 1980, 1981). The present paper describes the use of an experimental ‘instant’ infrared film produced and made available by the Polaroid Corporation.
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