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Author (up) Biren B. Kamdar, Jennifer L. Martin, Dale M. Needham
Title Noise and Light Pollution in the Hospital: A Call for Action Type Journal Article
Year 2017 Publication Journal of Hospital Medicine Abbreviated Journal
Volume 12 Issue 10 Pages 861-862
Keywords Commentary
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Call Number LoNNe @ kyba @ Serial 1770
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Author (up) Birriel, J. J.; Adkins, J. K.
Title Sky Brightness at Zenith During the January 2019 Total Lunar Eclipse Type Journal Article
Year 2019 Publication The Journal of the American Association of Variable Star Observers Abbreviated Journal
Volume 47 Issue 1 Pages 94
Keywords Skyglow
Abstract Lunar eclipses occur during the full moon phase when the moon is obscured by Earth's shadow. During these events, the night sky brightness changes as the full moon rises and then passes first into the penumbral and then the umbral shadow. We acquired sky brightness data at zenith using a Unihedron Sky Quality Meter during the 20-21 January 2019 total lunar eclipse as seen from Morehead, Kentucky. The resulting sky brightness curve shows an obvious signature when the moon enters the umbral (partial) eclipse phases and the total eclipse phase. During the total eclipse phase, the brightness curve is flat and measures 19.1 ± 0.1 mag / arcsec2. The observed brightness at totality is close to typical new moon in January night at our location, which measures 19.3 ± 0.1 mag / arcsec2. The partial eclipse phase is symmetric on either side of totality. The penumbral phase is more difficult to identify in the plot, without comparison to a typical full moon night. There is a clear asymmetry in the curve just before and just after the umbral phase. This asymmetry is probably due to changes in terrestrial atmospheric conditions, such as high altitude clouds.
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Call Number IDA @ intern @ Serial 2647
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Author (up) Birriel, J.; Adkins, J. K.
Title A Simple, Portable Apparatus to Measure Night Sky Brightness at Various Zenith Angles Type Journal Article
Year 2010 Publication The Journal of the American Association of Variable Star Observers Abbreviated Journal
Volume 38 Issue Pages 221
Keywords Remote Sensing
Abstract We describe a simple apparatus for making measurements of night sky brightness as a function of zenith and azimuth using “off-the-shelf” equipment: a Unihedron Sky Quality Meter with Lens, a protractor with plumb-line, a tripod, and a hand-held compass. Compared to a photoelectric or CCD photometric system, this apparatus is simple to set up and use and does not require complex data reduction procedures. Thus, this apparatus makes measurements of night sky brightness as a function of zenith and azimuthal angles quite amenable to students.
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Call Number LoNNe @ kagoburian @; IDA @ john @ Serial 905
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Author (up) Birriel, J.J.; Walker, C.E.; Thornsberry, C.R.
Title Analysis of Seven Years of Globe at Night Data. Type Journal Article
Year 2014 Publication Journal of the American Association of Variable Star Observers Abbreviated Journal J. AAVSO
Volume 42 Issue 1 Pages 219-228
Keywords Skyglow
Abstract The Globe at Night (GaN) project website contains seven years of night-sky brightness data contributed by citizen scientists. We perform a statistical analysis of naked-eye limiting magnitudes (NELMs) and find that over the period from 2006 to 2012 global averages of NELMs have remained essentially constant. Observations in which participants reported both NELM and Unihedron Sky Quality Meter (SQM) measurements are compared to a theoretical expression relating night sky surface brightness and NELM: the overall agreement between observed and predicted NELM values based on the reported SQM measurements supports the reliability of GaN data.
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Call Number LoNNe @ christopher.kyba @ Serial 535
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Author (up) Bisketzis, N.; Polymeropoulos, G.; Topalis, F. V.
Title A Mesopic Vision Approach for a Better Design of Road Lighting. Type Journal Article
Year 2004 Publication WSEAS Transactions on Circuits and Systems Abbreviated Journal
Volume 3 Issue 5 Pages 1380–1385
Keywords Lighting
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Call Number LoNNe @ kagoburian @ Serial 626
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