Insights into HONO sources from observations during a solar eclipse

Solar radiation during a total solar eclipse

Coordinated weather balloon solar radiation measurements during a solar eclipse

Solar eclipses provide a rapidly changing solar radiation environment. These changes can be studied using simple photodiode sensors, if the radiation reaching the sensors is unaffected by cloud. Transporting the sensors aloft using standard meteorological instrument packages modified to carry extra sensors, provides one promising but hitherto unexploited possibility for making solar eclipse rad...

Limits on radiative decays of solar neutrinos from a measurement during a solar eclipse

A search for possible radiative decays of solar neutrinos with emission of photons in the visible range was performed during the total solar eclipse of August 11, 1999. Due to very bad weather conditions our two telescopes were unable to collect useful data; fortunately we obtained several video camera images from a local TV station. An analysis of the digitised images is presented and limits o...

Attenuation of irradiance during solar eclipse

Attenuation of global ultraviolet and visible irradiance over Greece during the total solar eclipse of 29 March 2006 A. Kazantzidis, A. F. Bais, C. Emde, S. Kazadzis, and C. S. Zerefos Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece Institut für Physik der Atmosphäre, Deutsches Zentrum für Luftund Raumfahrt (DLR), Oberpfaffenhofen, 82234 Wessling, G...

New Insights into Ultraluminous X-ray Sources from Deep Xmm-newton Observations

The controversy over whether ultraluminous X-ray sources (ULXs) contain a new intermediate-mass class of black holes (IMBHs) remains unresolved. We present new analyses of the deepest XMM-Newton observations of ULXs that address their underlying nature. We examine both empirical and physical modelling of the X-ray spectra of a sample of thirteen of the highest quality ULX datasets, and find tha...