The large magnetic cloud caused by coronal mass ejection at the Sun on January 6, 1997 came to the Earth at early morning on January 10 and continue to interact with Earth's magnetosphere till January 11 (see for example home page of this event prepeared by Dr. M.Peredo http://www-istp.gsfc.nasa.gov/istp/cloud_jan97/event.html ). ... During the days discussed here INTERBALL-1 satellite was in the magnetosphere (MS) near its dusk flunk - see the Fig. 1 for compearing. ...

... Let us first find out which way -- rise in spectral resolution with some loss in the S/N ratio or increase in the S/N ratio with a fixed spectral resolution -- is better for the purpose of reduction of equivalent width determination errors. ... N -- number of counts for 1 ? ... line equivalent width, . ... Thus if the spectral resolution is managed to be increased (i.e. to decrease )without loss in the number of counts falling at 1 ?, the equivalent width measurement error is then proportional to . ...

... Optical, X-ray, -ray, UV . ... Crab, B0540-69, Geminga, B1509-58, Vela . Optical - Crab, B0540-69, Geminga, Vela . ... X-ray - 27 pulsars (13 pulsed), 7 msps (3 pulsed) . X-ray - 3 thermal surface cooling emission . X-rays pulsed, unpulsed or from bow shock . Outer gap emission . ...

Hubble Observations Shed New Light on Jupiter Collision . Was it a comet or an asteroid? ... Their initial findings, combined with results from other space-borne and ground-based telescopes, shed new light on Jupiter's atmospheric winds, its immense magnetic field, the mysterious dark debris from the impacts, and the composition of the doomed comet itself. ... Hubble's ultraviolet observations show the motion of very fine impact debris particles now suspended high in Jupiter's atmosphere. ...

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Green ESO . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... Interferometric observations of a single star are shown, as the distance between the two telescopes is gradually increased. The observed pattern at the focal plane clearly changes, and the "fringes" disappear completely. ...

... Some optical observations of auroral forms have indicated anomalous enhancement of emission within a very limited altitude range of about 2 km (Oguti, 1975; Stenbaek-Nielsen and Hallinan, 1979; Stenbaek-Nielsen, 1980a, b), and have been called as enhanced aurora. ... Res. ... Oguti, T., Two-tiered auroral band, J. Atmos. ... Res., 85 , 4299, 1980b. Stenbaek-Nielsen, H. C., and T. N. Hallinan, Pulsating auroras: Evidence for noncollisional thermalization of precipitating electrons, J. Geophys. ...

Static Fourier spectrometers are often used for spectral measurements of the ionosphere emissions. There are two main advantages of Fourier spectrometers (FS) - large geometric factor and high spectral resolution; these parameters are two orders better than for grating spectral instruments. ... In scanning Fourier spectrometer optical and electric modulation of signal is used to avoid this problem, for static Fourier spectrometer there are no such ways. ...

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

... This study reveals for the first time the existence of bi-directional jets, which are a signature of magnetic reconnection, occurring along coronal hole (CH) boundaries. ... K) emission lines in an equatorial extension of a polar coronal hole, known as the ``Elephant's Trunk'' coronal hole, show small regions of a few arc-seconds size with strong blue- and red-shifted emission reaching Doppler shifts of up to 150km s, i.e. bi-directional jets. ...

... To determine a lower limit to the sensitivity of current observations to measurements of NS surface temperatures, we have used data from the Einstein Slew Survey (Elvis et al. 1990) to establish temperature limits for 275 pulsars which received nonzero exposure during the survey. ... Filled squares correspond to pulsars actually detected in the survey data; the smaller symbols correspond to upper limits to the count rates. ... Click here for plot of x-ray data vs. cooling curves. ...

... Field of interest: data analysis and interpretation of X-ray observations of BHC and NS systems, astrophysics of compact objects and related phenomena: X-ray , optical and radio observations , shocks and stellar winds, emission mechanism, the spectral and timing analysis of the X-ray emission from microquasars ( signature of accreting BH), atoll- and Z-sources ( signature of accreting NS), modeling of INTEGRAL images % . ...

... Galaxy Collisions: Simulation vs Observations . ... 14.05.2013 . ... Explanation: What happens when two galaxies collide? ... Since galaxies are mostly empty space, no internal stars are likely to themselves collide . ... Pictured above is a computer simulation of two large spiral galaxies colliding , interspersed with real still images taken by the Hubble Space Telescope . ... May 2013 . ... Publications with keywords: colliding galaxies . Publications with words: colliding galaxies . ...

... Up: Data Analysis and Processing Techniques . ... Also, a method for quality control of CCD observations is suggested. ... Everyone who observes a celestial object using a CCD detects moving celestial objects as a ``by product''. ... We hope that our investigations may be useful for near-Earth space control and also for searches of the moving celestial objects through analysis of old and new CCD frames obtained at any amateur or professional astronomical observatory. ...

... Contact A Problem of an estimation of accuracy of the asteroid CCD observations . The Minor Planet Center supported by the Interntional Astronomical Union is the main office for keeping observational data of the small Solar System bodies and their investigations. ... At Pulkovo Observatory we are estimating an accuracy of the CCD asteroid observations obtained by amateurs and professional astronomers all over the World using the MPC database. ...

Astronomy Discussion Forums . Forums: . ... Discussion Forums . ... Black Matter . Forum List | ... Post Message | ... Black Matter is composed of all of the light emissions from all of the stars in the universe since stars were first formed, less that amount of light that has been absorbed into stars, planets etc. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

ПУБЛИКАЦИИ - 1994 год . G.Ya.Smolkov , V.P.Nefedyev, A.M.Uralov , N.N.Kardapolova. Step-wise emergence and development of microwave emission of active regions-a fundamental property of active solar corona. Solar coronal structures, Proc of 144th IAU Coll, Veda, Publhouse of SAS, - 1994. ... The observations of solar microwave bursts at the Siberian solar radio telescope with 50-millisecond resolution. ... Nato Rubl/Nauka, - 1994. ... Electron beam propagation in the solar corona. ... 1994. ...

... Telescope . ... In 2009 a new Electron Multiplying Frame Tranfer CCD Andor iХon DU-888 was purshased with support from Excellence Cluster Universe, Technische Universitaet Muenchen and delivered to RTT150 telescope. ... First scientific observations were made on 3--10 November 2009. In particular, the time resolved observations of Crab pulsar were made (33 ms pulse period). In the Figure we show the pulse profile with 7 msec time resolution, obtained in a single 10 minute long observation. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... 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 Mati†иre noire : une observation d†йfie les astronomes . ... A la une . ... En effet, selon les mod†иles th†йoriques, les concentrations de mati†иre noire sont les lieux o†µ naissent les galaxies. ... Une mati†иre noire au comportement ordinaire ? ... Etat du ciel . ...

... Theavailable grating tilts (i.e. spectrum centers) are: Low Dispersion Blue (bandwidth ~ 3250 ) Red (bandwidth ~ 3250 )Hydrogen 4400 7700 Helium 4000 (not 4400 ) 7700 Neon 4400 7700 Argon 4400 7700 Mercury 4400 7700 *High Dispersion Blue (bandwidth ~ 835 ) Red (bandwidth ~ 1100 )Hydrogen Helium 4200 4700 Neon 5100 6000 6800 7600 8400 Argon 4400 7300 8000 8800 9600 Mercury 4000 5600 * * Hg red spectrum dominated by contaminating argon . ... Generate GIF images using: . ... scaling the PICT image . ...