Peremennye Zvezdy", . ... We present the historical light curve of NGC 4151 for 1906 - 2007. The light curve is primarily based on our published photoelectric data (1968 - 2007, about 1040 nightly mean measurements) and photographic estimates (mostly Odessa and Moscow plates taken in 1906 - 1982, about 350 measurements; Oknyanskij 1977, 1978, 1983). ... 1983) (Harvard and Steward observatories' patrol plates taken in 1910 - 1968, about 210 measurements). ... Light Curve . ...

... 9) Oknyanskij V.L. 1994, "Optical-radio time delays in Q0957+561", Odessa Astronomical Publ., ... 11) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NGC4151", in Proceedings of Int. Conf. ... 1994. 12) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NGC4151", Astrophys. and Space Science, 222, p.157. ... 14) Oknyanskij V.L., van Groningen E., 1997, "Optical spectral variability of NGC4151 in 1990", Astronomical and Astrophys. ...

This section of the main exhibit depicts some of the tools and techniques used by scientists to study the earth's atmosphere and our surrounding universe. It includes an interactive model of the Arecibo radio telescope . ... light and color, the electromagnetic spectrum, and spectroscopy. The operation of the telescope, the optical laboratory and the HF facility . are also described in this section. photos by: tony acevedo 1997 ...

. at the conferents-hall . of the Sternberg Astronomical Institute, . at 14 00 on Friday, April 8 , 2005 . (109-th seminar) . 1. S.N.Fabrika . "Optical spectroscopy of ultrabright X-ray sources into external galaxies" . 30 min . 2. S.N.Fabrika . "Spectrum of presupernova SN2004dj in NGC2403" . 30 min . The secretary of the seminar - M.E.Prokhorov . Access free (code 2197) . Abstracts and INTERNET Subscribe possible at . http://xray.sai.msu.ru/sciwork/eseminars.html .

... MASTER COMPILATION of GOODS/CDF-S spectroscopy . CDF-S Master Spectroscopic Catalog - v1.2 ( 26/08/2004): . ... Vanzella et al., 2004, (astro-ph/0406591) . VLT/FORS2 spectroscopy . ... Le Fevre et al., 2004, (astro-ph/0403628) . ... Szokoly et al.,2004, (astro-ph/0312324) . ... 2004 ApJ 600 L99 . ... 2004, ApJ, 602, L5 . ... Strolger at al.,2004,(astro-ph/0406546) . ... ESO/WFI-R image with marked objects with existing public spectroscopic data in the GOODS/CDF-S area . ...

... 332, P L25-L28 (1998). Abstract . ... 332, P 395-409 (1998). ... 332, P 410-428 (1998). ... 332, P 429-448 (1998). ... 332, P 449-458 (1998). ... 332, P 459-478 (1998). ... 332, P 479-492 (1998). ... 332, P 493-502 (1998). ... 332, P 503-513 (1998). ... 332, P 514-522 (1998). ... 332, P 523-525 (1998). ... 332, P 526-540 (1998). ... 332, P 541-560 (1998). ... 332, P 561-568 (1998). ... 332, P 569-574 (1998). ... 332, P 575-585 (1998). ... 332, P 586-604 (1998). ... helpdesk@link.springer.de ...

To main of Laboratory . The research work and design of optical and optical-electronic devices are carries out by laboratory staff: . ... Lens: . ... In the layout 1 prism systems perform functions of dispersive element, corrector of aberrations, optical reducer. ... Spectral range 200 - 400 nm; . ... Back Forward . ... The main corrector's function are compensation of field aberrations of the main spherical mirror of a telescope (diameter of 600 mm, f'=1200 mm) and increase aperture ratio. ...

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. ...

... 1999) WWW database of optical constants for astronomy. ... Of some interest may be the tools of the Kramers-Kronig analysis , the Effective Medium Theory and light scattering codes available in Internet. ... In particular it allows one to obtain "optical" properties of different materials in the energy range from 30 up to 30.000 eV. ... Academic Press, New York. ... This code allows you to calculate the optical properties of a homogeneous sphere without leaving Internet. a couple of other Mie codes ...

... High redshift radio galaxies . ... Verkhodanov O.V., Kopylov A.I., Zhelenkova O.P., Verkhodanova N.V., Chernenkov V.N., Parijskij Yu.N., Soboleva N.S., Temirova A.V. 2000. ... Verkhodanov O.V., Kopylov A.I., Parijskij Yu.N., Soboleva N.S., Temirova A.V. "Color ages of parent galaxies of high redshift radio sources", in Proc. XV Conf. on "Aktualnye problemy vnegalakticheskoi astronomii" ("Current Problems of Extragalactic Astronomy"), Pushchino, May 25--29, 1998, printed in Pushchino Sci. ...

. 6). From their rest-frame UV emission we can estimate individual star formation rates, and study evolution of the star formation rate density with cosmic time. At lower redshifts, near-infrared spectroscopy (including slitless spectroscopy with WFC3 on HST) has enabled us to measure star formation rates at redshifts beyond one through the redshifted rest-frame optical lines. I will review current work on this, and look to future developments (in particular JWST).

... There are preliminary series of photometric and radio spectral observations of the above-mentioned stars, archival data on the light curves of the stars, results of the search for OH and H 2 O maser emission in IRAS point sources that possess the IR parameters similar to Miras. ... The aim is a detailed study of the maser emission variability. ... In 1996-1997, astronomical observations of Mira Ceti-type stars (miras) were carried out in three spectral ranges: optical, infrared, and radio. ...

Progress in science is inversely proportional to the number of journals" . ... PHYSICS JOURNALS . SPIRES-HEP Database Covers more than 415,000 high-energy physics related articles, including journal papers, preprints, e-prints, technical reports, conference papers and theses, received by the SLAC and/or DESY Libraries since 1974. ... Journal of Physics G: Nuclear and Particle Physics . ... Journal of Geometry and Physics (Special Issues) . ... Journal of Nuclear Materials (Special Issues) . ...

... The selective detector response and the response at an intermediate frequency of 1.4 GHz are measured under the action of a signal in the frequency range 350 ­ 1250 GHz. ... 341 Josephson mixers can have a noise temperature two to three times lower than that of spectrometers using Schottky diodes.1,2 The method of Hilbert spectroscopy,3 employed for processing the selective detector response of a Josephson junction, has been widely used to the present day. ...

... GCN 8471 | ... TITLE: GCN CIRCULAR NUMBER: 8516 SUBJECT: GRB 081102: MASTER refind and final results DATE: 08/11/11 15:50:10 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalognikh Ural State GCN Circ 8470, Lipunov et al., ...

... Visited 5957 times - Selected 51 months ago . ... Visited 3425 times - Selected 51 months ago . ... Visited 5554 times - Selected 51 months ago . ... Visited 5870 times - Selected 51 months ago . ... Visited 4096 times - Selected 51 months ago . ... Visited 4225 times - Selected 51 months ago . ... Visited 3412 times - Selected 52 months ago . ... Visited 4698 times - Selected 51 months ago . ... Visited 5823 times - Selected 51 months ago . ... Visited 3067 times - Selected 51 months ago . ...

Supernova 2006aj (GRB 060218) in Anonymous . This page is devoted to information on Supernova 2006aj in an anonymous galaxy. ... Information on the original web pages for many of these images can be found on the updates and links web pages. Origially a gamma ray burst discovered by the Swift burst alert telescope . This supernova is the afterglow of gamma ray burst GRB 060218 . ... GCN 4775 Swift-BAT detection of a possible burst . GCN 4776 GRB 060218: Swift XRT Position . ...

Supernova 2006aj (GRB 060218) in Anonymous . This page is devoted to information on Supernova 2006aj in an anonymous galaxy. ... Information on the original web pages for many of these images can be found on the updates and links web pages. Origially a gamma ray burst discovered by the Swift burst alert telescope . This supernova is the afterglow of gamma ray burst GRB 060218 . ... GCN 4775 Swift-BAT detection of a possible burst . GCN 4776 GRB 060218: Swift XRT Position . ...

... Spectroscopy for Everyone! Tom Field . Thursday, Sep 8, 2011 at 8:00 PM . ... However, until the last few years, spectroscopy has been too expensive and difficult for all but a few amateurs. Today, though, new tools make spectroscopy accessible to almost all of us. ... This will be our first web-talk, in which the speaker will be giving a live talk from a remote site (in this case, Seattle). ... Speaker Bio . ... Sep . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... OXIDIZED AND HYDRATED SILICATES ON M- AND S- ASTEROIDS: SPECTRAL INDICATIONS. ... In particular, it was shown that a considerable fraction (ab. 35%) of the mainbelt M-type asteroids have absorption bands at 3 µm [3, 6] diagnostic of water of hydration. At the same time it was found that the visible-range reflectance spectra of some M- and Sasteroids include absorption features characterizing presence of oxidized silicates [4, 5]. ... The reflectance spectra of 161 Athor (Fig. 1), 497 Iva (Fig. ...