Variable A in M33 is a member of a rare class of highly luminous, evolved stars near the upper luminosity boundary that show sudden and dramatic shifts in apparent temperature due to the formation of optically thick winds in high mass loss episodes. Recent optical and infrared spectroscopy and imaging reveal that its ``eruption,'' begun in ~1950, has ended, having lasted ~45 yr. ... ADS ] . ADS Citation Query . citations = 29 . citations vs. year [year,citations] . ...

Peremennye Zvezdy", . ... Min . ... USNO-A2.0 1200-04124994 . ... Comm. ... USNO-A2.0 1200-04128085 . ... Primary minimum:HJD(TT) 2455191.296 0.002. ... Primary minimum:HJD(TT) 2455275.254 0.002. ... Primary minimum:HJD(TT) 2455191.255 0.002. ... Infrared colors J H = 0.350, H K = 0.153 and J K = 0.503 (2MASS) are consistent with the dK spectral type (Bessell and Brett 1988) and BY: classification. ... Primary minimum: HJD(TT) 2455205.285 0.001. ... Primary minimum: HJD(TT) 2455191.2245 0.0009. ...

CATS home ] [ Back to CATS list ] [ ftp ] . ... 363Landau+ Fifty-five variable radio sources have been observed at 90 GHz, 22 of them for first time. ... The variability of those sources previously observed is somewhat greater than observed by Owen et al. (1978); some sources exhibited the lowest flux densities ever recorded at 90 GHz. ... The adopted 90-GHz flux density of DR21 is 17.7 Jy and is based on a 90-GHz brightness temperature of 183.4+-3.4 K for Jupiter (Ulich 1978). ...

Next: Preparing Your Data in Up: userhtml Previous: Image Items . A Miriad uv dataset is composed of a collection of items and ` u-v variables'. ... Table C.1 gives a list of the items that are used to build up a Miriad uv dataset. Table C.1: Miriad items in a uv visibility dataset . ... integer . ... gains . ... antenna gain table . ... number of feeds on each antenna . ... number of antenna gains in each record of `gains' . ... frequency set up description table for `bandpass' . ...

Catalogue of eclipsing variables (CEV) is the world's principal database of eclipsing binary systems with available classification. CEV contains identifications, classifications, photometry, periods, eclipses data, spectral types, references and notes for 7179 systems. Format of the current CEV . CEV main table (~1.0MB) . ... List of systems, erroneously classified as eclipsing binaries in GCVS (they are not included in the CEV main table) Download all files as a single archive (~0.6MB) . ...

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

Follow-up observations with the University of Washington 0.76 m telescope at Manastash Ridge Observatory (MRO) of the Sloan Digital Sky Survey (SDSS) cataclysmic variable (CV) SDSS J170053+400358 are presented. ... They estimate that the dimming amounted to about 0.028 mag (using two comparison stars that were each about 4 mag fainter than HD 209458). only UW affiliated authors have been listed, student researchers are marked with an ``*'' . ... XTE J1859+226" UW affiliated authors: *Kevin Krisciunas. ...

... Astrophysics Group . ... COAST . COAST Astronomical Results . ... Surface Imaging of Betelgeuse . ... This page highlights some astronomical results obtained with COAST over the years. These are listed in chronological order (most recent first). ... Measurements of cyclic variations in the angular diameter of Chi Cygni . ... The first infrared image from an aperture synthesis array . ... The images of Betelgeuse below were reconstructed from COAST data taken in early 2004. ...

DSS input form . The SuperCOSMOS Sky Survey . ... Pi of the Sky . The Sloan Digital Sky Survey . ... Extragalactic DataBase . ... SIMBAD Astronomical Database . ... Query form . ... The Two Micron All Sky Survey. ... The NRAO VLA Sky Survey . ... NIST Atomic Spectra Database (Lines Form) . ... The UVES Paranal Observatory Project . ... Rochester Astronomy . ... European Southern Observatory . European Astronomical Society . ... Astronomical Society of the Pacific . ... Sat24 BTA on line . ...

... The draft classification (version August 9, 2006) for new GCVS versions . IAU XXVIth General Assembly, . ... Along with the "+" sign (coexistence of two types), it is suggested to introduce the "|" sign (meaning "or") – for classification options for the same object, e.g. EC|Ell, EC|RR. Pulsating variables . Present: . ... L, Lb (for red stars) . ... Eruptive variables . ... Move to rotating variables . ... ACV, SXARI . ACV . ... Cataclysmic variables and other stars with outbursts . ...

... Posts tagged ?variable selection? ... arXiv:stat.ME:0910.2585] . Variable Selection and Updating In Model-Based Discriminant Analysis for High Dimensional Data with Food Authenticity Applications . ... Entries RSS . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

... A new bright LBV (Luminous Blue Variable) star was detected in M33 galaxy. LBV stars are the most massive stars in the final stages of evolution before exploding in of supernovae. ... The new LBV star (Fig.1) is the seventh in M33. ... It is one of the brightest LBV stars of the M33 galaxy. ... The brightest object is the core of the galaxy, - a compact star cluster comprising a supermassive black hole. The new LBV star N93351 is located down and to the left from the core. ...

... В теме В разделе По форуму . ... Темы, интересные всем ? ... Научная панорама ? arxiv:0705.4195 VSOP: The Variable Star One-shot Project . предыдущая тема следующая тема . ... 0 Пользователей и 1 Гость просматривают эту тему. ... arxiv:0705.4195 VSOP: The Variable Star One-shot Project I. Описание проекта и первый релиз данных (VSOP: The Variable Star One-shot Project I. Project presentation and first data release) . ... VSOP - The Variable Star One-shot Project ( http://vsop.sc.eso.org/ ). ...

... 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. ...

Welcome to Sergei Shugarov Home Page . Cataclysmic Variables Investigator . ... Cataclysmic Variable Star Home-page: http://cataclysm.sai.msu.ru) . ... Ikeya-Zhang Comet ephemeris, 2001-2003 . ... The Astronomical Conferences: . ... 31 March - 3 April 2004. ... 2004 . ... 2003 Conference in Gettingen, August 2001 . ... Conference on Variables Star, Odessa, August 2001 . Russian Astronomical Conference, August, 2001 Saint-Peterburg . Conference of Nova Star, Spain, Sitges, 20-24 May, 2002 . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 March 26 . T Tauri and Hind's Variable Nebula . ... Explanation: The yellowish star near center in this remarkable telescopic skyview is T Tauri, prototype of the class of T Tauri variable stars. Nearby it is a dusty yellow cosmic cloud historically known as Hind's Variable Nebula (NGC 1555). ... About APOD | ...

... 2. (a) Metallicity function and relations between (b) metallicity and radial velocity, (c) metallicity and maximum distance from the Galactic plane,and (d)metallicity and variability period for RR Lyrae variables in the initial sample.The curve in the first graph is the maximum-likelihood approximation of the distribution using a sum of two normal curves with the indicated means,dispersions,and total numbers. ... next figure | privious figure . ...

THE 75th NAME-LIST OF VARIABLE STARS. ... The 75th Name-List consists of two tables. ... the literature, taken from positional catalogues, including USNO A1.0/A2.0 and GSC, or determined by the authors); the range of variability (sometimes the column Min gives, in parentheses, the amplitude of light variation; the symbol ( means that the star , in minimum light, becomes fainter, than the magnitude indicated); and the system of magnitudes used ( P are photographic ...

... In nearly all cases, rgssources requires information from the CCF. ... Because the exceptions are insignificant and involve complicated logic to disentangle, it has been made mandatory to supply a CCF to the task. The location of the CCF is pointed to in the usual way, ie via the environment variable SAS_CCF. ... The task may also require information from the ODF summary file, in which case the variable SAS_ODF must be set before running the task. ...

... A new study using AAT ?chelle spectroscopy and HST spectrophotometry has revised this value upwards to (Woolf & Jeffery 2000). Measuring for the PVTel variables poses considerable difficulties. ... In spite of these constraints, Jeffery et al. (2000) succeeded in obtaining nearly contiguous ultraviolet photometry and radial velocities ( ) of three PVTel variables. Analysis of the UV photometry provided measures of and . ... 2000). ...