Search results for "observator"
showing 10 items of 410 documents
A next generation Ultra-Fast Flash Observatory (UFFO-100) for IR/optical observations of the rise phase of gamma-ray bursts
2012
The Swift Gamma-ray Burst (GRB) observatory responds to GRB triggers with optical observations in ~ 100 s, but cannot respond faster than ~ 60 s. While some ground-based telescopes respond quickly, the number of sub-60 s detections remains small. In mid- to late-2013, the Ultra-Fast Flash Observatory-Pathfinder is to be launched on the Lomonosov spacecraft to investigate early optical GRB emission. This pathfinder mission is necessarily limited in sensitivity and event rate; here we discuss a next generation rapid-response space observatory. We list science topics motivating our instruments, those that require rapid optical-IR GRB response, including: A survey of GRB rise shapes/times, meas…
Follow-up of Astrophysical Transients in Real Time with the IceCube Neutrino Observatory
2020
In multi-messenger astronomy, rapid investigation of interesting transients is imperative. As an observatory with a 4$\pi$ steradian field of view and $\sim$99\% uptime, the IceCube Neutrino Observatory is a unique facility to follow up transients, and to provide valuable insight for other observatories and inform their observing decisions. Since 2016, IceCube has been using low-latency data to rapidly respond to interesting astrophysical events reported by the multi-messenger observational community. Here, we describe the pipeline used to perform these follow up analyses and provide a summary of the 58 analyses performed as of July 2020. We find no significant signal in the first 58 analys…
LOFT - A large observatory for x-ray timing
2010
The high time resolution observations of the X-ray sky hold the key to a number of diagnostics of fundamental physics, some of which are unaccessible to other types of investigations, such as those based on imaging and spectroscopy. Revealing strong gravitational field effects, measuring the mass and spin of black holes and the equation of state of ultradense matter are among the goals of such observations. At present prospects for future, non-focused X-ray timing experiments following the exciting age of RXTE/PCA are uncertain. Technological limitations are unavoidably faced in the conception and development of experiments with effective area of several square meters, as needed in order to…
Cosmological waveguides for gravitational waves
1997
We study the linearized equations describing the propagation of gravitational waves through dust. In the leading order of the WKB approximation, dust behaves as a non-dispersive, non-dissipative medium. Taking advantage of these features, we explore the possibility that a gravitational wave from a distant source gets trapped by the gravitational field of a long filament of galaxies of the kind seen in the large scale structure of the Universe. Such a waveguiding effect may lead to a huge magnification of the radiation from distant sources, thus lowering the sensitivity required for a successful detection of gravitational waves by detectors like VIRGO, LIGO and LISA.
Holographic in-situ measurements of the spatial droplet distribution in stratiform clouds
1998
Ground based in-situ measurements on the small-scale structure of low-level stratiform clouds have been performed utilizing the HOlographic Droplet and Aerosol Recording system (HODAR) of the University of Mainz, Germany. 6 holograms recorded during stratus cloud events on the Kleiner Feldberg Taunus Mountain Observatory (Frankfurt, Germany) were reconstructed in the laboratory and analysed by means of an automated data extraction and image processing system. In post-processing, each originally recorded droplet population was subjected to 2 statistical methods: (1) the sub-cell scanning analyses with statistical “Fishing” tests and (2) measurements of inter-droplet distance frequency distri…
La experiencia docente del Observatorio de derechos humanos en la formación de juristas comprometidos
2021
[EN] The Human Rights Observatory is a pilot experience based on the teaching-learning methodology that allows, in an open, dynamic and participatory way. It monitors international current affairs and opens up a space for discussion and debate in the classroom on all those phenomena that, to a greater or lesser extent, condition International Law in the contemporary world. For this purpose, the Observatory will raise questions about issues of interest, highly topical subjects, complex problems, controversial processes and, above all, new approaches that encourage, not only through autonomous work but also through critical reflection, to deepen and complement the theoretical content of the d…
Observatori Astronòmic
2008
Els misteris del cel estan més prop des de la fundació, fa ja un segle, de l'Observatori Astronòmic de la Universitat de València. Actualment, l'Observatori viu una etapa d'expansió. El seu personal desenvolupa diverses línies d'investigació, i al mateix temps realitza tasques de docència i divulgació de l'astronomia en la societat.
The THESEUS space mission concept: science case, design and expected performances
2018
THESEUS is a space mission concept aimed at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-domain astrophysics. These goals will be achieved through a unique combination of instruments allowing GRB and X-ray transient detection over a broad field of view (more than 1sr) with 0.5¿1 arcmin localization, an energy band extending from several MeV down to 0.3¿keV and high sensitivity to transient sources in the soft X-ray domain, as well as on-board prompt (few minutes) follow-up with a 0.7¿m class IR telescope with both imaging and spectroscopic capabilities. THESEUS will be perfectly suited for addressing …
Zvaigžņotā Debess: 2017, Vasara (236)
2017
Contents: In MEMORIAM of ANDREJS ALKSNIS: Curriculum Vitae of Andrejs Alksnis (1928-2017) ; Condolences and Parting Words ; List of Publications by Professor Andrejs Alksnis ; “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: J.Francmanis. Enigma of Saturn’s Rings Brightness (abridged) ; E.Mūkins. Crater on Mercury Named After Rainis (abridged) ; Ā.Alksne. The Starry Sky in the Summer of 1977 (abridged) ; DEVELOPMENTS in SCIENCE: K.Schwartz. Early Universe Through the Eyes of Telescopes ; DISCOVERIES: K.Schwartz. Dwarf Galaxy Henize 2-10 with a Massive Black Hole ; J.Kuzmanis. Hot Topic – FRB 121102 ; SPACE RESEARCH and EXPLORATION: J.Kalvāns. Are Earth's Oceans of Interstellar Origin? ; J.Jaunbergs. ‘D…
Zvaigžņotā Debess: 2008/09, Ziema
2008
Latvijas Zinātņu akadēmija, Latvijas Universitāte