Kinetic inductance detectors (KIDs) show promise as a competitive technology for astronomical observations over a wide range of wavelengths. We are interested in comparing the fundamental limitations to the sensitivity of KIDs with that of transition edge sensors (TESs) at millimeter wavelengths, specifically over the wavelengths required for studies of the Cosmic Microwave Background (CMB). We...

This article reports a study of attitudes and beliefs about seasonal psychological cycles in a sample of 160 people living in London. Participants rated their perceptions of seasonal fluctuations on cognitive, emotional, physical, and social functioning in themselves, in others at the same latitude, and in the Arctic population by means of the Seasonal Pattern Assessment Questionnaire and a spe...

Astronomical images provide information about the great variety of celestial objects in the Universe, the physical processes taking place in it, and the formation and evolution of the cosmos. Great efforts are made to automatically detect stellar bodies in images due to the large volumes of data and the fact that the intensity of many sources is at the detection level of the instrument. In this...

Astro-WISE1 (Vriend et al. 2012) is the Astronomical Wide-field Imaging System for Europe (Valentijn et al. 2007). It is a scientific information system which consists of hardware and software federated over about a dozen institutes throughout Europe. It has been developed to exploit the ever increasing avalanche of data produced by astronomical surveys and data intensive scientific experiments...

For the astronomer, x-ray interferometry is the theory and practice of building dilute aperture telescopes for studying celestial x-ray sources. The short wavelengths and high surface brightness of x-ray sources will make the eventual scientific payoff very high, with direct imaging of the event horizons of black holes as the centerpiece. In this article we review the history of x-ray interfero...

Astronomical & Astrophysical Transactions The Journal of the Eurasian Astronomical Society Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713453505 Flux density evolution of the sources 3C273, 3C279 and 3C454.3 at the frequencies 102 MHz-36.8 GHz A. E. Volvach a; L. N. Volvach a; M. G. Larionov b; H. D. Aller...

TheUSVirtual Astronomical Observatorywas a software infrastructure anddevelopment project designed both to begin the establishment of an operational Virtual Observatory (VO) and to provide the US coordination with the international VO effort. The concept of the VO is to provide the means by which an astronomer is able to discover, access, and process data seamlessly, regardless of its physical ...

The present work aims to validate the positions of solar filaments published in Annals Coimbra University Astronomical Observatory, currently Geophysical and Observatory Coimbra, corresponding years 1929 1941. Stonyhurst were obtained by an original method devised early 20th century that used a spherical calculator instrument, wood-made model Sun. We digital images spectroheliograms measure fil...

The coupling of large telescopes to astronomical instruments has historically been challenging due the tension between instrument throughput and stability. Light from telescope can either be injected wholesale into instrument, maintaining high at cost point-spread function (PSF) stability, or time-varying components light filtered out with single-mode fibers (SMFs), stability loss. Today, field...

Systematic surveys of astronomical objects often lead to discoveries, but always provide invaluable information for statistical studies of well-defined samples. They also promote follow-up investigations of individual objects or classes. Surveys using a yet unexplored observing wavelength, a novel technique or a new instrument are of special importance. Significantly improved observing paramete...