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... Previous: Substepping and its Application to HST Imaging . ... This is a preliminary report on an application of the co-addition technique based upon the Richardson-Lucy algorithm. The combination of high signal-to-noise ground-based images obtained with the ESO NTT using SUSI with high angular resolution HST FOC f/96 images gives new insights on the properties of galaxy cores and their potential time variability. Cores of galaxies are one of the main thrusts of present extragalactic research. ...

Îáùàÿ Àñòðîíîìè÷åñêàÿ Êîíôåðåíöèÿ > Òîâàðû äëÿ àñòðîíîìîâ > Ïîëåçíîå äëÿ àñòðîíîìèè . Galaxies And How To Observe Them+ Êðîññ-èíäåêñ . ... Ïîèñê . ... R.Bak . ... Ñàáæåâàÿ êíèãà âåñüìà äîñòîéíîå ðóêîâîäñòâî ïî íàáëþäåíèþ ãàëàêòèê, èìååò ñóùåñòâåííûé íåäîñòàòîê - ó íåå íåò êðîññ-èíäåêñà îáúåêòîâ, ÷òî çàòðóäíÿåò ïîèñê âíóòðè êíèãè. ... AÍÄÐÅÉ= . ... Ñîçâåçäèÿ (ïîèñê è îïèñàíèå) .. Ñîçâåçäèÿ þæíîãî íåáà (ïîèñê è îïèñàíèå) .. Îñåííèå ñîçâåçäèÿ (ïîèñê è îïèñàíèå) .. ...

... Huchra, M. Ramella, A. P. Fairall, C. Smith, S. Lipari We report redshifts, magnitudes and morphological classifications for 5369 galaxies with $m_B \ leq 15.5$ and 57 galaxies fainter than this limit, in two regions covering a total of 1.70 steradians in the southern celestial hemisphere ... The precision of the radial velocities is of $\sim$ 40 \kms\ and the redshift survey is more than 99\% complete to the $m_{SSRS2}$ = 15.5 magnitude limit. ... Tables 2 and 3 contain the SSRS2 catalog. ...

... 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"). ...

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Multiple Supernovae in the same galaxy . ... When looking at these images, you should note just how big these galaxies are. ... SN 2009as and sn2009gb images sub-page . ... LOTOSS discovered 2003hl , and a few weeks later JM Llapasset was taking an image of it, and he noticed a new star . ... Supernovae 2002cv and 2002bo in NGC 3190 2002cv was discovered by Campo Imperatore Observatory while observing 2002bo in IR. 2002cv was only visible in IR must likly due to it being behind a dust lane. ...

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

... In this paper we present the results of detailed B, V, R, I, and H study of the isolated nearby blue compact dwarf (BCD) galaxy NGC6789. Judging from the literature the observed galaxy has not been resolved into stars up to now. ... The distance of the galaxy, estimated from the tip of the red giant branch (TRGB) is 2.1 Mpc which places NGC6789 close to the Local Group. ... Key words: nearby galaxies: dwarf galaxies (NGC 6789): distance moduli: star content . ... Distance. ...

Next: Transparency of the Stochastic Up: Model of the Galaxy Previous: Frequency distribution of galactic . ... The parameters of the model resulted from a numerical fitting of various data, such as the observed distribution of the young star population and neutral hydrogen, the density of population II stars in the vicinity of the Sun, the galactic rotation curve and the dynamics and distribution of globular clusters   and dwarf irregular satellites of the Galaxy. ...

... We suggest simple method of the selection of distant galaxies based on their radio properties. ... RC0015+0503a , RC0015+0503b , RC0015+0501 , RC0034+0513 , RC0038+0449 , RC0042+0504 . ... RC0105+0501 , RC0110+0500 , RC0117+0503 , RC0126+0502 , RC0133+0459 , RC0135+0450 , RC0137+0539 , RC0143+0505 , RC0152+0453 , RC0154+0459 , RC0159+0448 . ... RC0209+0501b , RC0213+0516 , RC0226+0512 , RC0250+0512 . ... RC0302+0456 , RC0308+0454 , RC0311+0507 , RC0318+0456 , RC0355+0449 . ...

... Contacting and discussing with people sharing your interests, participating in night sky observations with telescopes as well as a large choice of astronomical books, magazines and video-tapes out of our club library. ... A reasonable compromise for observing both planets and brightest deep sky objects ( nebulae, galaxies) are either a 4 to 8 inch mirror telescope ( Newton, Schmidt-Cassegrain ) or a 3 to 4 inch refracting ( lens) telescope. ... Where can I buy a telescope in Luxembourg ? ...

An image of the grand design of spiral galaxy M100 obtained with NASA's Hubble Space Telescope resolves individual stars within the majestic spiral arms. ... Hubble has the ability to resolve individual stars in other galaxies and measure accurately the light from very faint stars. This makes space telescope invaluable for identifying a rare class of pulsating stars, called Cepheid Variable stars embedded within M100's spiral arms. ... 617) 495-7062 . Fax: (617) 495-7356 . ...

Brad Carter, Carolyn Brown, Rhodes Hart Drew Foster, John Kielkopf, Ron Moore University of Southern Queensland, Australia University of Louisville, Kentucky, USA OVERVIEW Mt Kent Observatory is now providing live remote observations of southern skies as part of a collaborative project between USQ, the University of Louisville, and Northern Kentucky University. ... This enables observers to make daytime use of a remote telescope during its local night-time, and image otherwise inaccessible skies. ...

... The Co­Addition Technique Applied to Images of Galaxy Cores W. W. Zeilinger Institut f˜ur Astronomie, University of Vienna, T˜urkenschanzstraúe 17, A­1180 Wien, Austria P. Crane, P. GrosbÜl and A. Renzini European Southern Observatory, Karl­Schwarzschild Straúe 2, D­85748 Garching, Germany Abstract. ... One may therefore take full advantage of the high resolution FOC images by co­adding them with (high signal­to­noise) ground­ based data. ... References Crane, P. et al. ...

Abstract -- Abundances of heavy elements decreases with increasing galactocentric distance almost in all disk galaxies. ... To explain this gradient in young objects and in the interstellar gas one has to assume that a typical disk galaxy is an open system, i.e. it expels some synthesized heavy elements into the circumgalactic space and/or accretes intergalactic gas with zero metallicity, with rates of both processes depending on the galactocentric distance. ...

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By Catalog Type . ... By R.A. Abell 14 . ... Abell 119 . ... Abell 147 . ... Abell 151 . ... Abell 194 . ... Abell 262 . ... Abell 347 . ... Abell 397 . ... Abell 400 . ... Abell 407 . ... Abell 426 . ... Abell 539 . ... Abell 548 . ... Abell 569 . ... Abell 576 . ... Abell 634 . ... Abell 671 . ... Abell 754 . ... Abell 779 . ... Abell 999 . ... Abell 1060 . ... Abell 1139 . ... Abell 1185 . ... Abell 1213 . ... Abell 1228 . ... Abell 1314 . ... Abell 1318 . ... Abell 1367 . ... Abell 1377 . ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...