Results 51 to 60 of about 308,461 (247)
Optical Photometry of Flares and Flare Statistics [PDF]
International Astronomical Union Colloquium, 1983 This review discusses optical observations of flares and the results gleaned from these. Excellent reviews of flare activity have been published in the past and one might mention in particular Kunkel (1975), Gershberg (1978) and Gurzadyan (1980). In general these have been more broadly based than the present review incorporating other aspects of flare ...
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The absolute age of the globular cluster M15 using near-infrared adaptive optics images from PISCES/LBT [PDF]
, 2015 We present deep near-infrared (NIR) J, Ks photometry of the old, metal-poor Galactic globular cluster M\,15 obtained with images collected with the LUCI1 and PISCES cameras available at the Large Binocular Telescope (LBT).
Arcidiacono, C. +28 more
core +3 more sources
Array Polarimetry and Optical-Differencing Photometry [PDF]
Symposium - International Astronomical Union, 1995 Array detectors have improved the efficiency of optical polarimetry sufficiently for this technique to become part of the standard arsenal of observational facilities. However, we could gain even more: spatially-differentiating photometry can be implemented as an option of array Polarimeters and low-noise, high-frame-rate array detectors will allow ...
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Energies, 2018 Energy saving in street lighting is garnering more interest and has become a priority in municipal management. Therefore, LED luminaires are gradually becoming prevalent in our cities.
Alfonso Gago-Calderón +3 more
doaj +1 more source
Discovery of a 66 mas Ultracool Binary with Laser Guide Star Adaptive Optics [PDF]
, 2007 We present the discovery of 2MASS J21321145+1341584AB as a closely separated (0.066") very low-mass field dwarf binary resolved in the near-infrared by the Keck II Telescope using laser guide star adaptive optics. Physical association is deduced from the
Adam J. Burgasser +8 more
core +2 more sources
Paving the way to daytime optical feeder links based on LGS assisted adaptive optics
International Conference on Space Optics, 2021 We report on experiments performed with the Swedish Solar Telescope (SST) located in La Palma (Canary Islands) to observe the sodium Laser Guide Star (LGS) during daytime.
D. Alaluf +8 more
semanticscholar +1 more source
Optical photometry and polarimetry and infrared photometry of 3C 345 in outburst
The Astrophysical Journal, 1993 We present V-band CCD photometry, UBVRI photopolarimetry, and near simultaneous JHK photometry of 3C 345 during a renewed outburst in spring of 1992, which reached maximum at the end of April. The observations also show a large and variable polarization.
Masami Okyudo +4 more
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Optical polarimetry and photometry of comet 17P/Holmes [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 11pages, 7 figures, accepted for publication in ...
U. C. Joshi +2 more
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MODERNIZATION OF AZT-22 TELESCOPE OF MAIDANAK HIGH-ALTITUDE OBSERVATORY: TESTING RESULTS
Radio Physics and Radio Astronomy, 2014 The AZT-22 telescope, equipped with the ML09000-65 CCD camera, has shown to be capable of obtaining high-quality images of astronomical objects and thus solving a wide range of observational tasks.
A. V. Sergeev +9 more
doaj +1 more source
Optical spectroscopy and photometry of SAX J1808.4−3658 in outburst [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 We present phase resolved optical spectroscopy and photometry of V4580 Sagittarii, the optical counterpart to the accretion powered millisecond pulsar SAX J1808.4-3658, obtained during the 2008 September/October outburst. Doppler tomography of the N III 4640.64 Bowen blend emission line reveals a focused spot of emission at a location consistent with ...
Mark Reynolds +12 more
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