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Walker, M.F. |
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Title |
The California Site Survey. |
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1970 |
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Publications of the Astronomical Society of the Pacific |
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82 |
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672-698 |
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Skyglow |
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LoNNe @ kagoburian @ |
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568 |
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Author |
Sánchez, S. F.; Aceituno, J.; Thiele, U.; Pérez-RamÃrez, D.; Alves, J. |
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Title |
The Night Sky at the Calar Alto Observatory |
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Journal Article |
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2007 |
Publication |
Publications of the Astronomical Society of the Pacific |
Abbreviated Journal |
Publ Astron Soc Pac |
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Volume |
119 |
Issue |
860 |
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1186-1200 |
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Keywords |
Skyglow, Darkness |
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0004-6280 |
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LoNNe @ christopher.kyba @ |
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1131 |
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Author |
Walker, M.F. |
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Title |
The effects of urban lighting on the brightness of the night sky |
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Journal Article |
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Year |
1977 |
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Publications of the Astronomical Society of the Pacific |
Abbreviated Journal |
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89 |
Issue |
529 |
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Skyglow |
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A new study of urban lighting and its effect on the brightness of the night sky indicates: (1) The total light output of cities of similar economic development is at least approximately proportional to their populations. (2) The artificial illumination of the night sky at 45 ° altitude in the direction of the illuminating city varies as I∝ D¯²⁵ .(3) The distance at which cities of a given population produce a brightening of the sky of 0.2 magnitude at 45° altitude toward the city varies as P∝ D2.5 . |
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LoNNe @ kagoburian @ |
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561 |
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Author |
Duriscoe, D.M. |
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Title |
Measuring Anthropogenic Sky Glow Using a Natural Sky Brightness Model. |
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Journal Article |
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2013 |
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Publications of the Astronomical Society of the Pacific |
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125 |
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933 |
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1370-1382 |
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Skyglow |
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Anthropogenic sky glow (a result of light pollution) combines with the natural background brightness of the night sky when viewed by an observer on the earth’s surface. In order to measure the anthropogenic component accurately, the natural component must be identified and subtracted. A model of the moonless natural sky brightness in the V-band was constructed from existing data on the Zodiacal Light, an airglow model based on the van Rhijn function, and a model of integrated starlight (including diffuse galactic light) constructed from images made with the same equipment used for sky brightness observations. The model also incorporates effective extinction by the atmosphere and is improved at high zenith angles (>80°) by the addition of atmospheric diffuse light. The model may be projected onto local horizon coordinates for a given observation at a resolution of 0.05° over the hemisphere of the sky, allowing it to be accurately registered with data images obtained from any site. Zodiacal Light and integrated starlight models compare favorably with observations from remote dark sky sites, matching within ± 8 nL over 95% of the sky. The natural airglow may be only approximately modeled, errors of up to ± 25 nL are seen when the airglow is rapidly changing or has considerable character (banding); ± 8 nL precision may be expected under favorable conditions. When subtracted from all-sky brightness data images, the model significantly improves estimates of sky glow from anthropogenic sources, especially at sites that experience slight to moderate light pollution. |
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LoNNe @ christopher.kyba @ |
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539 |
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Author |
Grauer, A.D.; Grauer, P.A.; Davies, N.; Davies, G. |
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Title |
Impact of Space Weather on the Natural Night Sky |
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Journal Article |
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2019 |
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Publications of the Astronomical Society of the Pacific |
Abbreviated Journal |
PASP |
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131 |
Issue |
1005 |
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114508 |
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Darkness; night sky brightness; United States; New Zealand; Sun; space weather; solar wind |
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In 2018, Solar Cycle 24 entered a deep solar minimum. During this period, we collected night sky brightness data at Cosmic Campground International Dark Sky Sanctuary (CCIDSS) in the USA (2018 September 4–2019 January 4) and at Aotea/Great Barrier Island International Dark Sky Sanctuary (AGBIIDSS) in New Zealand (2018 March 26–August 31. These sites have artificial-light-pollution-free natural night skies. The equipment employed are identical Unihedron SQM-LU-DL meters, used as single-channel differential photometers, to scan the sky as Earth rotates on its axis. We have developed new analysis techniques which select those data points which are uninfluenced by Sun, Moon, or clouds to follow brightness changes at selected points on the celestial sphere and to measure the brightness of the airglow above its quiescent level. The 2018 natural night sky was measured to change in brightness by approximately 0.9 mag arcsec−2 at both locations. Preliminary results indicate the modulations of the light curves (brightness versus R.A.) we observed are related in complex ways to elements of space weather conditions in the near-Earth environment. In particular, episodes of increased night sky brightness are observed to be contemporaneous with geomagnetic activity, increases in mean solar wind speed, and some solar proton/electron fluence events. Charged particles in the solar wind take days to reach near-Earth environment after a coronal hole is observed to be facing in our direction. Use of this information could make it possible to predict increases in Earth’s natural night sky brightness several days in advance. What we have learned during this solar minimum leads us to search for other solar driven changes in night sky brightness as the Sun begins to move into solar maximum conditions. |
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Catalina Sky Survey, Lunar and Planetary Laboratory, University of Arizona, USA; algrauer(at)me.com |
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Astronomical Society of the Pacific |
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English |
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English |
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0004-6280 |
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IDA @ john @ |
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2696 |
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