Next: Extinction efficiencies: general behaviour Up: Optical properties of cosmic Previous: Optical properties of cosmic . It is now evident that observed interstellar extinction cannot be explain using particles of only one kind. ... The intensity of radiation after passing a dust cloud is equal to . ... The interstellar extinction is . ... Next: Extinction efficiencies: general behaviour Up: Optical properties of cosmic Previous: Optical properties of cosmic root 2003-04-09 ...

We present an extinction analysis of nine reddened/comparison star pairs in the Large and Small Magellanic Clouds (LMC and SMC) based on Far-Ultraviolet Spectroscopic Explorer (FUSE) FUV observations. To date, just two LMC sight lines have probed dust grain composition and size distributions in the Magellanic Clouds using spectral data for wavelengths as short as 950 ц…. ... An intermediate product of this extinction analysis is the measurement of new H2 abundances in the Magellanic Clouds. ...

... Extinction Class Reference . ... voidљ . forward (const Vec3d *altAzPos, float *mag, const int num=1) const . ... forward (const Vec3f *altAzPos, float *mag, const int num=1) const . ... forward (const double *sinAlt, float *mag, const int num) const . ... forward (const float *sinAlt, float *mag, const int num) const . ... forward (const double *sinAlt, float *mag) const . ... forward (const float *sinAlt, float *mag) const . ... backward (const float *sinAlt, float *mag, const int num=1) const . ...

Next: Airmass Calculation Up: Flux Calibration Previous: Flux Calibration . To calibrate the chromatic response, observations of a standard star (preferably more than one) are needed, for which the absolute fluxes are known. The spectral response curve of the instrument can then be determined with the command RESPONSE/LONG , and absolute fluxes for the objects of interest are obtained with CALIBRATE/FLUX . ...

Next: Infrared Data Up: Contents Previous: Optical Photometry . ... For example, one method is to derive the spectral energy distribution (SED) for a target star and compare it to the SED of a dereddened standard star. ... Temperature can be determine via the B - V color (Gilliland 1985): . ... The results produced small extinctions to the background stars of between A and A . ... The most accurate extinction calculation requires both IR and spectral data. Infrared Data . Spectroscopic Data . ...

... Abstract: We present an extensive study of the radiative transfer in dusty galaxies based on Monte Carlo simulations. ... We have explored the dependence of A_l on a conspicuous set of quantities (Hubble type, inclination, dust optical thickness, dust distribution and extinction properties) for a large wavelength interval, ranging from 1250A to the K band, thus finally providing a comprehensive atlas of dust extinction in galaxies, which is electronically available. ... S04_MD20[ att , abs ] . ...

... Public . Science . ... Science Users Information > Observing with ESO Telescopes > Observing Tools and Services > La Silla Extinction Coefficients . ... Observing with ESO Telescopes . ... Publications with ESO Data . ... Large Programmes . ... ESO/GTC Programmes . Public Surveys Programmes . ... Phase 1 Proposals . ... Public Surveys Phase 2 . ... A more detailed discussion of extinction on La Silla can be found in the ESO Messenger #11, December 1977, and the article by Burki et al. ...

... Bojan Nikolic web pages (r. 329) . Understanding Infrared emission from galaxies . Although the package <a href=?dustmodel.html?>dust</a> is primarily aimed at modelling emission from interstellar dust at mid/far IR wavelengths it has the facilities to compute both Mie <em>scattering</em> and <em>absorption</em>. ... This is a python script which calls the pydust library to compute the Mie absorption and scattering efficiencies: . ... Mie Extinction . Computing Mie Scattering . ...

... B?rbel Koribalski (ATNF), and Sebastian Juraszek (University of Sydney, ATNF) . ... About 25% of the optical extragalactic sky is obscured by the dust and stars of our Milky Way. ... Various approaches are presently being employed to uncover the galaxy distribution in this Zone of Avoidance (ZOA). ... Galaxies within the innermost part of the Milky Way - typically at a foreground obscuration in the blue of A B 5 m and |b| . ... bkoribal@atnf.csiro.au ...

I review recent developments in the study of interstellar extinction, specifically findings on the wavelength-dependence of the extinction curve both within the Milky Way and toward nearby galaxies; And how these affect distance determinations to the Galactic centre, and in the context of HubbleтАЩs constant, and toward Type Ia supernovae. ...

... IS gas + dust = cosmic abundance [X/H]g + [X/H]d = [X/H]cosmic 5 elements: C, O, Mg, Si, Fe Gas: absorption lines Dust : IS extinction curves Abundances : Reference, cosmic, interstellar , solar COSMIC Sun 06.08.2008 , 12-30 ISM-SAO 5 Interstellar dust grains consist of five the most «important» elements: C, O ­ primary Units: Mg, Si, Fe ­ major ... ApJ 641, 327, 2006 (STIS) + Fitting () 06.08.2008, 12-30 ISM-SAO 62 c2 c3 c4 06.08.2008, 12-30 ISM-SAO 63 06.08.2008, 12-30 ISM-SAO 64 ...

... Absorption cross-sections of PAHs in the optical/UV (top) and infrared (bottom) as suggested by Li Draine (2001, dashed blue), Malloci et al. (2007, dotted green) and this work, with parameters of Table 1 for the ISM (dotted magenta) and for NGC 2023 (full magenta line). ... We present a model for the diffuse interstellar dust that explains the observed wavelength-dependence of extinction, emission, linear and circular polarisation of light. ... Dust grains with radii larger than 6 nm are spheroids....

... A star was observed at different zenith distances during one night at the Engelgardt's Astronomical Observatory in the program of atmospheric extinction study at blue. ... The determination of the star's brightness was performed with the method of photon counting. ... Variable star. ... The brightness of the variable star was measured occasionally during the other nights, and moments of maximal values of brightness (15.59m) were received on nights 2­5, the 2nd table. ... JD 2452805. ...

... Первая страница Назад Продолжить Последняя страница Обзор Изображения . Публикации с ключевыми словами: Галактика - звездная астрономия . Публикации со словами: Галактика - звездная астрономия . ... Дальний рукав в 3 кпк от центра . Лекции по Галактической Астрономии. ... Стрелец A*: быстрые звезды вблизи центра Галактики . ... KINO.RU - фильмы, кино театры, кино, расписание кино в г. Москва | ... Дизайн квартир и дизайн интерьера . ... Нужно рекламное агентство? ...

Atmospheric transparency in the optical and near IR range above the Shatdzhatmaz summit O.Voziakova (Sternberg Astronomical Institute, Russia) Atmospheric extinction in the MASS spectral band Atmospheric transparency in near IR range Example of a good photometric night. ... Distribution of atmospheric extinction in MASS Median = 0.23 mag 1-st quartile = 0.20 3-d quartile = 0.27 mag Vertical green line represents theoretical Rayleigh extinction for Shatdzhatmaz (0.16 mag). ...

. Earth penumbra effects on AES motion taking into account the refraction and the extinction of the light in the atmosphere . A. M. Fominov . Institute of Applied Astronomy, St. Petersburg, Russia Abstract: . No abstract Key words: . Very Long Baseline Interferometry (VLBI), celestial mechanics, AES motion, Earth penumbra effects, refraction of light in the atmosphere, extinction of light in the atmosphere.

... This is a photometric data reduction program. Currently it works under MS DOS only! ... Correction of the data for the atmospheric extinction; . ... using special observations of standard stars, and . using comparison stars observations (under some conditions); . ... The distribution includes the manual in LaTeX and DVI format (in Russian only...), examples of data files and the binary. ... All above files are stored is a self-extracting archive file for MS DOS, which you can get right away. ...

Date: 11/22/2014 Time:23:10 Moon Age: -0.2 Available Observing Hours: 12.9 Observer: Instrument: Operator: Cage: Lebofsky, Bell 90Prime Trueblood PF hours lost to: weather: 2.0 telescope: 0.0 instrument: 0.0 computer: 0.0 Time Temp Humidity Wind Vel. ... When 90P Expose is clicked on hh:mm:00, the Exposure setup msg appears ~2 sec later, which is also the time in the FITS header. The Integration Started msg appears ~8 sec later on red window, about ~5 sec later than time in FITS header. ...

... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...

... OBJECT имя объекта MODEL тип модели спектров (пока 2 значения: PEGASE1 и GISSEL98) G_TYPE тип галактики (E, S0, Sa, Sb, Sc или Sd) FILT_MAG_STR список данных по фильтрам с ошибками, формируется как строка из заданных фильтров, например: FILT_MAG_STR="B=23.73+0.21 V=23.57+0.2 R=22.36 I=20.81" Z_FIXED заданное красное смещение z Z_LIMITS пределы поиска z, когда красное смещение неизвестно AGE_LIMITS пределы поиска возраста EXTINCTION ключ задания вычисления экстинкции в заданных фильтрах RA | ...