Mostrar el registro sencillo del ítem Moreels, G. Clairemidi, J. Faivre, M. Pautet, D. Rubio Da Costa, F. Rousselot, P. Meriwether, J. W. Lehmacher, G. A. Vidal Safor, Erick Chau Chong Shing, Jorge Luis Monnet, G. 2018-07-18T16:13:46Z 2018-07-18T16:13:46Z 2008-10
dc.identifier.citation Moreels, G., Clairemidi, J., Faivre, M., Pautet, D., Rubio Da Costa, F., Rousselot, P., ... Monnet, G. (2008). Near-infrared sky background fluctuations at mid- and low latitudes.==$Experimental astronomy, 22$==(87). es_ES
dc.identifier.govdoc index-oti2018
dc.description.abstract The emission of the upper atmosphere introduces an additional variable component into observations of astronomical objects in the NIR 700–3,000 nm range. The subtraction of this component is not easy because it varies during the night by as much as 100% and it is not homogeneous over the sky. A program aimed at measuring and understanding the main characteristics of the atmospheric NIR emission was undertaken. A 512 × 512 CCD camera equipped with a RG780/2 mm filter is used to obtain images of the sky in a 36° × 36° field of view. The intensities of a given star and of the nearby region devoid of star in a 439 arcmin2 area are monitored during periods of time of several hours. The sky intensity measured in the 754–900 nm bandpass, reduced to zenith and zero airmass is comprised between mag20 and mag18.5 per arcsecond2. A diminution by a factor of two during the night is frequently observed. Intensity fluctuations having an amplitude of 15% and periods of 5–40 min are present in the images with a structure of regularly spaced stripes. The fluctuations of the NIR sky background intensity are due to (1) the chemical evolution of the upper atmosphere composition during the night and (2) dynamical processes such as tides with periods of 3–6 h or gravity waves with periods of several tens of minutes. We suggest that a monitoring of the sky background intensity could be set up when quantitative observations of astronomical objects require exposure times longer than ~10 min. The publication is illustrated with several video films accessible on the web site Enter username: nirsky and password: skynir. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Springer es_ES
dc.relation.ispartof urn:issn:0922-6435
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.subject Atmospheric effects es_ES
dc.subject Sky background es_ES
dc.subject Image processing es_ES
dc.subject Infrared es_ES
dc.subject Stars es_ES
dc.title Near-infrared sky background fluctuations at mid- and low latitudes es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.identifier.journal Experimental Astronomy es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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