Person: Nievas Rosillo, Mireia
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First Name
Mireia
Last Name
Nievas Rosillo
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Físicas
Department
Estructura de la Materia, Física Térmica y Electrónica
Area
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6 results
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Item Light Pollution Spanish REECL SQM Network(2015) Zamorano Calvo, Jaime; Sánchez de Miguel, Alejandro; Nievas Rosillo, Mireia; Tapia Ayuga, Carlos; Ocaña González, Francisco; Izquierdo Gómez, Jaime; Gallego Maestro, Jesús; Pascual Ramírez, SergioThe SQM network of the Spanish Light Pollution Research collaboration (http://guaix.fis.ucm.es/splpr/SQM-REECL) is growing with the help of amateur astronomers and interested citizens. Up to now there are 18 stations. SQM photometers provide measures of the night sky brightness every night using the PySQM software. The analysis of the data provided by the photometers allows the researchers to monitor the nightly, monthly and yearly evolution of the NSB and the relationship with sources of light pollution in intensity and distance. The photometers that are measuring in protected areas will alarm the researchers about eventual increasing of light pollution that could affect the environment. Using models of light dispersion on the atmosphere one can determine which light pollution sources are increasing the sky brightness at different places and in which extension. Networks of fixed photometers acquiring data every night are one of the main inputs to test these models.The collaborative effort of many people (citizen science) pro-vides the necessary data to derive scientific results.Item Report of the 2014 LoNNe intercomparison campaign(2015) Bará, Salvador; Espey, Brian; Falchi, Fabio; Kyba, Christopher C. M.; Nievas Rosillo, Mireia; Pescatori, Paolo; Ribas, Salvador; Sánchez de Miguel, Alejandro; Staubmann, Philipp; Tapia Ayuga, Carlos; Wuchterl, Günther; Zamorano Calvo, JaimeThe 2014 LoNNe (Loss of the Night Network) intercomparison campaign is the second of four campaigns planned during EU COST Action ES1204. The goal of these campaigns is to understand systematic uncertainty inherent in observations of skyglow (light pollution). An innovation of this year’s campaign was to take measurements with many of the nstruments at two sites: an urban location and a location far from artificial lights. This report summarizes the eeting, and also provides three recommendations for obtaining and analyzing handheld SQM observations. The UCM group of Astronomical Instrumentation and Extragalactic Astronomy (GUAIX) hosted the meeting at the Physics building of Universidad Complutense de Madrid (UCM). A meeting room at Departamento de Astrofísica y CC. de la Atmósfera and the astronomical observatory (Observatorio UCM) were prepared in advance. In particular, a tailor made station to set the SQM and other photometer devices was installed on the roof of the Physics building. The Laboratorio de Investigación Científica Avanzada (LICA) was used to test and characterize a number of devices and filters.Item Absolute photometry and Night Sky Brightness with all-sky cameras(2013) Nievas Rosillo, Mireia; Zamorano Calvo, Jaime; Contreras González, José LuisAll-sky cameras have proven to be powerful tools to continuously monitoring the sky in a wide range of fields in both Astrophysics and Meteorology. In this work, we have developed a complete software pipeline to analyze the night CCD images obtained with one of such systems. This let us to study typical parameters used in Astrophysics to characterize the night sky quality, such as the Sky Brightness, the Cloud Coverage and the Atmospheric Extinction, how they evolve over the time and their variability. Using our software, we analyzed a large set of data from AstMon-OT all-sky camera at Teide Observatory. Results from this work have been applied in the support to the spanish CTA site proposal at Izaña, Tenerife and are being discussed within the CTA consortium. A comparison with data from other devices that have been used in site characterization such as the IAC80 telescope is also presented. This comparison is used to validate the results of the analysis of all-sky images. Finally, we test our software with AstMon-UCM and DSLR cameras. Some general recommendations for the use of DSLR cameras are provided.Item Night Sky Brightness and Light Pollution in Comunidad de Madrid(2013) Zamorano Calvo, Jaime; Sánchez de Miguel, Alejandro; Gómez Castaño, José; Ocaña González, Francisco; Gallego Maestro, Jesús; Pila Díez, Berenice; Nievas Rosillo, Mireia; Tapia Ayuga, Carlos; Fernández Domínguez, Alberto; Pascual Ramírez, SergioPreliminary results of a study of the night sky background brightness around the city of Madrid using Sky Quality Meter (SQM) photometers are presented. Data-retrieval methodology includes an automatic procedure to measure from a moving vehicle which allows to speed up the data gathering. The night sky brightness, an astronomical quality parameter that accounts for luminous flux from the sky, is closely related with the light pollution. The map with the spatial distribution of the night sky brightness around Madrid has been compared to the light pollution as measured with calibrated satellite imagery and nocturnal images taken by astronauts aboard the International Space Station (ISS).Item NixNox procedure to build Night Sky Brightness maps from SQM photometers observations(2014) Zamorano Calvo, Jaime; Sánchez de Miguel, Alejandro; Nievas Rosillo, Mireia; Tapia Ayuga, CarlosThe NixNox procedure to build all-sky maps of the nocturnal night sky brightness using SQM photometers is described. Astronomers belonging to amateur associations in Spain are using this observational method to obtain data of their preferred sites of observation to characterize the astronomical quality of the sky and the sources of light pollution.Item Fotometría absoluta y brillo de fondo de cielo con AstMon-UCM(2012) Nievas Rosillo, Mireia; Zamorano Calvo, Jaime; Contreras González, José LuisLas imágenes de todo el cielo han demostrado ser una potente herramienta para determinar la calidad astronómica del cielo, y su uso se está extendiendo hoy en día tanto ubicaciones de futuros observatorios como en los ya existentes. El observatorio astronómico de la Universidad Complutense de Madrid (Observatorio UCM) es un observatorio urbano situado en el Campus Universitario que constituye un excepcional laboratorio para estudiar efectos de la actividad humana como la contaminación lumínica, la contaminación del aire y la concentración de aerosoles en la calidad astronómica del cielo. Para estudiar estos efectos, instalamos hace dos años el monitor astronómico AstMon-UCM. Durante el pasado año hemos desarrollado un paquete de programas de código abierto para automatizar el análisis de las imágenes de cámaras de todo el cielo, caracterizando la calidad del cielo para observaciones astronómicas a través de parámetros como el Brillo de Fondo de Cielo o la Extinción Atmosférica. Este paquete se ha aplicado tanto en imágenes de AstMon-UCM como de otros monitores de todo el cielo y cámaras digitales equipadas con objetivos ojo de pez, comparando los resultados obtenidos con datos provenientes de fotómetros SQM. Estas herramientas abren la puerta a numerosas y excitantes posibilidades.[ABSTRACT] All-Sky images have proven to be a powerful tool for determining the astronomical sky quality, nowadays their use is spreading both for planned and existing observatories. The Universidad Complutense de Madrid’s astronomical observatory (Observatorio UCM) is an urban observatory located at Campus of the University. It provides an excepcional laboratory to study the effects of human activity such as light pollution, air pollutants and aerosol concentration in the astronomical quality of the sky. In order to study these effects, we set up two years ago the all-sky monitor AstMon-UCM. During the last year we have been developing an open-source software package to automate the analysis of all-sky cameras images. It characterizes sky quality for astronomical observations through parameters like Sky Brightness and Atmospheric Extinction. We have applied it to images from the AstMon-UCM, other all-sky monitors and common digital cameras equipped with fisheye lenses. Results have been compared with data derived from SQM photometers. These tools open the door to several exciting possibilities.