Results 11 to 20 of about 64,417 (247)

Precision CCD photometry of globular clusters [PDF]

open access: yes, 1987
The first part of this thesis presents a review of colour-magnitude photometry of Galactic globular clusters. A survey has been made of recently-published colourmagnitude photometry of globular clusters, and a self-consistent distance scale established ...
Noble, Richard Gareth
core   +7 more sources

The Apparent Tidal Decay of WASP-4 b Can Be Explained by the Rømer Effect

open access: yesUniverse, 2023
Tidal orbital decay plays a vital role in the evolution of hot Jupiter systems. As of now, this has only been observationally confirmed for the WASP-12 system.
Jan-Vincent Harre, Alexis M. S. Smith
doaj   +1 more source

SAINT (Small Aperture Imaging Network Telescope)—A Wide-Field Telescope Complex for Detecting and Studying Optical Transients at Times from Milliseconds to Years

open access: yesPhotonics, 2023
In this paper, we present a project of a multi-channel wide-field optical sky monitoring system with high temporal resolution—Small Aperture Imaging Network Telescope (SAINT)— mostly built from off-the-shelf components and aimed towards searching and ...
Grigory Beskin   +9 more
doaj   +1 more source

Identifying the Photometric Characteristics and Applicability of Hybrid Solar Lighting

open access: yesEnergies, 2022
The present research aims at promoting the stability and applicability of a hybrid daylighting system combining daylight and artificial light, which eventually enables a constant and pleasant luminous flux of the mixed light delivered by a terminal ...
Hyun-Joo Han   +5 more
doaj   +1 more source

Identification of the Mixing Ratios of Beer-Mixed Beverages by UV/VIS Spectroscopy

open access: yesBeverages, 2023
UV/VIS spectroscopy was used in conjunction with a calibration method to determine the mixing ratio of samples of beer-mixed drinks with mineral water (sour Radler beers) from the food service industry.
Sophia Stinus   +3 more
doaj   +1 more source

tasoc/photometry: Version 4.5

open access: yes, 2020
Version 4.5 includes minor fixes and additions, mostly to the automatic switching from aperture to halo-photometry and an improved internal record-keeping of the type of photometry performed on each ...
Benjamin Pope   +3 more
core   +1 more source

Spectroscopy and multiband photometry of the afterglow of intermediate duration γ-ray burst GRB 040924 and its host galaxy [PDF]

open access: yes, 2008
Aims. We present optical photometry and spectroscopy of the afterglow and host galaxy of gamma-ray burst GRB040924. This GRB had a rather short duration of T90 ∼ 2.4 s, and a well sampled optical afterglow light curve.
Kidger, M.   +117 more
core   +3 more sources

Luminosity and photometry [PDF]

open access: yesProceedings of the Royal Society of London, 1897
Abstract The luminosity of the spectrum was determined by what may be term ed the method of the “minimal effective stimulus.” Through the partition separating two dark rooms from each other a hole was drilled 1 mm. across; this was covered with a piece of ground glass.
openaire   +2 more sources

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