... To help choose between these competing hypotheses, the nearby Seyfert II galaxy NGC 4388 has been observed in X-ray light recently by many recent Earth-orbiting X-ray observatories, including CGRO , SIGMA , BeppoSAX , INTEGRAL , Chandra , and XMM-Newton . ... The constant flux and apparent absorption of very specific X-ray colors by cool iron together give evidence that the central black hole in NGC 4388 is seen through a thick torus composed of molecular gas and dust . ... Too Close to a Black Hole...

... 2004 September 8 . Molecular Torus Surrounds Black Hole . ... Explanation: Why do some black hole surroundings appear brighter than others? ... Alternatively, the black holes in the center of Seyfert Type II galaxies might be obscured by a surrounding torus . ... The constant flux and apparent absorption of very specific X-ray colors by cool iron together give evidence that the central black hole in NGC 4388 is seen through a thick torus composed of molecular gas and dust . ... About APOD | ...

... Schedule IKI RAN Data Acquisition, Processing and Dissemination Center . SRC "Planeta" Data Acquisition, Processing and Dissemination Center . Sea Surface Temperature Adriatic Sea . Baltic Sea . Barents Sea . Black Sea . ... Composite Image of Cloudiness Russia . ... Regional Archive (only cloudless data) . ... Operative Regional Archive (all data for last 3 days) . ... NOAA Data on other Servers (about Russia) . For more information send a mail to: info@sputnik.infospace.ru . ...

You can also see this page in Russian with using KOI8 (X Windows) or CP1251 (MS Windows) Cyrillic coding. The Laboratory supports the space TV experiments, mainly in the planetary exploration missions. ... Image Co-registration . ... PHOBOS mission - Martian satellites investigations. Phobos on the Martian limb, the image from Phobos-2 probe from 02/28/89. ... Russian Space Bulletin. ... Last modified at June,26 1997 Alexey Kuzmin: akuzmin@mx.iki.rssi.ru . Back to IKI home page ...

... For us to see them from such great distances, quasars must be producing enormous energy -- they are about 1000 times brighter than an average galaxy! ... One of their choices for the energy source of quasars was a black hole. ... On the one hand, it may seem difficult to think that mere friction between bits of matter could account for the energy of a quasar, but, on the other hand, gravity is unimaginably strong near a black hole. ... How does matter actually rush towards the black hole? ...

... 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. ...

... We have measured this "redshift" for the pink black holes, and allowed for it in our calculations. ... We see this effect in the emission from gas around these pink black holes, but it is far too small an effect to account for the pinkness. Thus the swirling motions of gas around or into the black holes cannot produc the colour. ... At first we thought that these things were normal blue black holes hidden behind clouds of interstellar dust, that absorbed the blue light and made them appear pink. ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... Luminosity (L) · · · · A source's luminosity is the power that it emits in radiation. ... NB Astronomers often say `flux' when they mean `flux density' · SI units are Wm-2Hz -1 -26 filter · Also used are Jy 10 Wm-2Hz -1 E= РРРF d dA dt Specific Intensity, Surface Brightness (I) · Specific intensity (or surface brightness) is the power received (or emitted) per unit area per unit frequency per unit solid angle. ч F at surface of a spherical source = I · · Specific intensity is independent of distance...

... The supermassive black hole, that wasn't . ... Supermassive black holes reside in the center of galaxies and occupy the same space as normal stars belonging to the central part of the galaxy. ... Through this process supermassive black holes often deplete the stellar content of galaxy cores. ... On the contrary, the excellent resolution of the Gemini data shows that the core of this galaxy has a light excess incompatible with the theory that it hosts a supermassive black hole. ... today * ATNF | ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: How much can a supermassive black hole consume? ... Science Users Information . ... Observing with ESO Telescopes . ... Science Software . ... ESO-MIDAS . ... Data Handling and Products . Quality Control and Data Processing . Data Pipelines and Calibrations . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... ESO Science Newsletter . ...

... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . ... In July, 1976, Viking Orbiter 1 was acquiring images of the Cydonia region of Mars as part of the search for potential landing sites for Viking Lander 2. ... Using the height field, it is also possible to view the "Face" from different look directions, by mapping the Viking Orbiter image directly on the the topography and then placing the "viewer" at different locations. ... Mars . ...

BLACK WATER SIDE On a bright summer's morning as I went a-walking Viewing the streams that gently did flow, As the bright sun arose, the hills did adorn Surrounding the banks of the Black Water Side. ... I'll here take my lot in this low little cot On the lovely sweet banks of the Black Water Side." ... You know I adore you and praise none before you, You blooming sweet maid of the Black Water Side. ... You will find their dwelling On the lovely sweet banks of the Black Water Side. ...

Next: Prior Models Up: Prior Models and the Previous: Bayesian Paradigm . The observed image differs from the true brightness distribution in having been blurred and encountering statistical noise in the recording process. ... Let us describe the noise models. ... This model can be approximated, at least for high brightness values, by the Gaussian distribution . ... The noise model we will use in this paper is Poissonian; see Molina and Ripley (1989) for the use of robust Gaussian noise models. ...

... We show how wavelength-dependent time delays between continuum flux variations of active galactic nuclei (AGNs) can be used to test the standard black hole--accretion disc paradigm, by measuring the temperature structure T(R) of the gaseous material surrounding the purported black hole. ... We assume that the observed time delays are indeed caused by a classical accretion disc structure, and derive a redshift-independent luminosity distance to NGC 7469. ...

... Acceleration of particles in the vicinity of a massive black hole We propose a two-step mechanism for charged particle acceleration in the magnetosphere of a massive black hole surrounded by an accretion disk. Particles first gain energy by stochastic process during the accretion phase. It is shown that effective proton acceleration up to energies eV is possible in the turbulent magnetized accretion disk. ...

... X-rays are made up of photons that are emitted from stars, or quasars, or supernovae, the sun, or simply: anything that is undergoing a change either in size or temperature or giving out heat. ... in an X-ray binary star system, in which one normal star's orbit is crossed by a neutron star, when the neutron star by means of gravitational pull takes matter from the normal star X-rays form. ... Artists conception of a normal star (HDE 226868) and a black hole taking matter from the normal star. ...

[ CATS home ] [ Back to CATS list ] [ ftp ] . 2000ApJS..131..335Rutledge+ . Division of Physics, Mathematics and Astronomy MS 220-47, California Institute of Technology, Pasadena, CA 91107 rutledge@srl.caltech.edu, rb@astro.caltech.edu, prince@srl.caltech.edu

... шара трех разных цветов с перламутровым и сверкающим покрытием, они будут чудесно смотреться на елке и радовать детей и взрослых. Шары упакованы в прозрачную . ... Диаметр шаров: 5, 6, 7, 8 см. по 2 шт. ... Шары перламутровые, Волшебная страна можно купить в нашем интернет-магазине. ... Чехол Skinbox Shield 4People для HTC Desire 700 предназначен для защиты корпуса смартфона от механических повреждений и царапин в процессе эксплуатации. ...

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...