... The observed isotropy on the sky and non-uniform spatial distribution of gamma-ray bursts ? (GRB) revealed by the BATSE ? device onboard the Compton Gamma-Ray Observatory (e.g. Meegan et al. , 1992)[ 138 ] lend support to the idea of a cosmological origin of GRB (Prilutski and Usov, 1975;[ 165 ] Usov and Chibisov, 1975)[ 199 ] for which the best candidates could be merging binary NS+NS ? or NS+BH ? at high redshifts (z 1 -2), (Blinnikov et al. ... Calculation of Binary Neutron Star Coalescence Rates...

. Binary pulsars and other tests of Gravity Theories . General discussion of binary pulsars data in connection with relativistic gravity theories see: . T. Damour, "Experimental Tests of Relativistic Gravity" gr-qc/9904057

ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Parkes radio telescope . Australia Telescope Compact Array . ... Australia Telescope Online Archive (ATOA) . ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... What is a pulsar? ... Group . ... Animations . ... Pulsar Groups . ... Main / . ... WEB (MPEG 11MB) . ... Credit: John Rowe Animation/Australia Telescope National Facility, CSIRO . ...

... The explosion of a star as a Supernova is certainly one of the most energetic events observable in the whole universe, and their radiation covers the whole band from radio to gamma-rays, accompanied with neutrino emission. ... Type Ia SNe are supposed to result from mass transfer inside a binary system consisting of a white dwarf star and an evolving giant star, which results in a termonuclear explosion. ... Core-collapse Supernovae . ... For comments please contact: gcresci@arcetri.astro.it . ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualit?йs . ... des pages consacr?йes ?а la publication de vos photos Mais c'est aussi une vraie communaut?й avec laquelle partager votre passion et nourrir votre curiosit?й. Accueil Ce que nous avons pens?й de Gravity . ... Depuis que nous avons eu a chance de voir le film d'Alfonso Cuar??n, le d?йbat fait rage parmi les journalistes de Ciel & Espace . ... Gravity se hisse-t-il au niveau des films que nous n'oublierons jamais ? ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 January 22 . Neutron Bounce Quantized in Earth Gravity . ... Explanation: For the first time, Earth's gravity has been used to isolate quantum energy levels of the neutron. The effect may be used in the future to test for slightly different effects of gravity on neutrally charged particles of different mass . ... About APOD | ...

... solar system . ... Einsteinт??s general relativity passes extreme test in pulsar binary system . ... Under the extreme conditions of this system, some scientists thought that the equations of general relativity might not accurately predict the amount of gravitational radiation. ... We thought this system might be extreme enough to show a breakdown in general relativity, but instead, Einstein's predictions held up quite well, said Paulo Freire of the Max Planck Institute for Radio Astronomy in...

... 2 Columns At the present time, the REGION table is de ned for a two-dimensional space. ... ROTANG (rotation angle): for rotated elements; like X and Y, this column needs to contain vectors of suфcient length. ... Table 1: REGION Table SHAPEs SHAPE X Y R ROTANG Point X Y Circle Xcen Ycen R Ellipse Xcen Ycen Rmaj ; Rmin Angle Annulus Xcen Ycen Rin ; Rout Elliptannulus Xcen Ycen Rinmaj ; Rinmin ; Angin ; Routmaj ; Routmin Angout Box Xcen Ycen Xsize ; Ysize Rotbox Xcen ...

An astronaut in low Earth orbit moves in (approximately) a big circle extending around the Earth. ... That can be interpreted as stating that in the astronaut's frame of reference, all bodies are subject to two forces, gravity and the centrifugal force, and the two are in perfect balance, adding up to zero. ... Wheel-shaped space . ... The science-fiction film "2001: A Space Odyssey" featured spinning space station, whose rotation provided the crew with "artificial gravity." ...

... Harald Ebeling, University of Hawaii . ... Abstract . ... Identifying the host galaxies for optically dark gamma-ray bursts . ... The Architecture of Exoplanetary Systems . ... The proposers use Chandra to obtain precise positions of the GRB, and deep follow-up HST observations to search for the host galaxy. ... The calibration of thsi relation rests on observations of binary systems, primarily eclipsing binaries at masses above 1 M Sun , and primarily astrometric binaries at sub-solar masses. ...

... A Powerful Gamma Ray Burst . ... Credit Copyright: S. R. Kulkarni, S. G. Djorgovski ( Caltech ), the Caltech GRB Team , NASA Explanation: Gamma-ray bursts are thought to be the most powerful explosions in the Universe, yet the cause of these high-energy flashes remains a mystery . Blindingly bright for space-based gamma-ray detectors the burst sources are so faint at visible wavelengths that large telescopes and sensitive cameras are required to search for them. ... Gamma Ray Bursting . ...

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

Обзоры hep-ph: тематический рубрикатор . Эффекты квантовой гравитации . hep-ph/0305158 . ... Authors: D. V. Ahluwalia-Khalilova, Irina Dymnikova . Comments: This essay received an "honorable mention" in the 2003 Essay Competition of the Gravity Research Foundation . ... Comments: 4 pages . ... Comments: 9 pages, Latex . ... Comments: 14 pages LaTeX, 7 eps figures . ... Comments: 90 pages AMSTeX, 24 Figures . ... Comments: 29 pages, 4 figures . ... Вернуться в тематический рубрикатор hep-ph ...

... We present a computer program for modelling energy flux distribution and light curves of eclipsing binaries from far ultraviolet to infrared regions. The Roche model is assumed. Proximity effects of components (reflection of radiation and surface gravity darkening) are taken into account. ... Figure 1: The surface temperature distribution for Algol A-B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation effect. ...

... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... Galaxies . ... Window on the Universe . ... Gamma-Ray Bursts . ... This artistтАЩs impression shows two galaxies in the early Universe. ... As the light from the burst passes through the two galaxies ?аon the way to Earth (outside the frame to the right) some colours are absorbed by the cool gas in the galaxies, leaving characteristic dark lines in the spectrum. ... Early Universe : Cosmology : Phenomenon : Gamma Ray Burst . ...

Astrophysical implications of external triggers, GRB030329 in particular External Triggers subgroup Ї Ї GRB astrophysics is still very uncertain Associated GW emission: even more uncertain Interpret our observations in the simplest terms Easy to re-cast in terms of specific models Provides some astrophysical context which is readily interpretable Probable: The GRB field will need GW observations to fully understand GRB progenitor astrophysics Nov 10, 2003 Frey 1 Short and Long GRBs.. ...

... Galaxy Evolution Explorer (GALEX) . ... Searching for SZ clusters . ... Baryon content of galaxy clusters and cosmology . ... 3 sigma peaks: Observational Signatures of High Redshift Galaxies and Low Redshift Clusters . CLUSTERS OF GALAXIES . ... Clusters of galaxies seen in X-rays: war and peace . ... Chandra X-ray Observations of Clusters/Groups/Galaxies . ... Common timing features in neutron stars and black holes . ... X-ray luminosity function of low-mass X-ray binaries in galaxies . ...

... Anonymous The way in which a spacecraft increases or decreases its kinetic energy by swinging around a moving planet is very similar to the way a certain type of water turbine, the Pelton Wheel, extracts energy from a fast jet of water. ... What is the connection with planetary gravity-assist maneuvers ? ... Pelton wheel In particular, if the water overtakes a vane moving at half its speed, then (neglecting friction) it loses all its velocity and just dribbles out of the moving vane. ...

... Space flight . ... Zero Gravity . ... The airplane volume (3,4m У 3,2m У 14.1 Л), as well as the payload of experimental equipment, allocated in the laboratory compartment, advantageously single out our airplane from the similar ones in the world. The results of tests and experiments are registered by the standard on-board aircraft systems and additional test- and measuring equipment of the customer. ... Length of the airplane . ... Flight duration . ... Auxiliary Radio Communication Equipment: . ...

... Bad Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Does the gravity of the moon affect us ( our blood etc. ) as it affects other liquids , like causing the tide to rise and fall ? ... The Moon pulls harder on one side of the Earth than the other, causing the Earth to stretch a bit. ... One other thing: although tides from the Moon do not directly affect us, they have a profound affect on the Earth which in turn does affect us. ...