Visual Discovery of SN1995V in NGC 1087. ... My basic supernova search still continues with my backyard 41cm telescope. ... The discovery of supernova 1995V in NGC 1087 is the second discovery to be made this year with the larger telescope. ... After this, they took two CCD pictures of NGC 1087 from which the magnitude of the supernova could be calculated in relation to a nearby measured star, and the offsets of the supernova could also be measured. ...

The ESA/ESO Astronomy Exercise Series 2 . The Distance to Messier 100 as Determined by Cepheid Variable Stars . ... The small variations in distance to the individual Cepheid variable stars in the Cloud are negligible compared with the much larger distance to the SMC. ... In this way Cepheid variable stars can be used as one of the 'standard candles' in the Universe that act either as distance indicators themselves or can be used to calibrate (or set the zero point for) other distance indicators. ...

... CEPHEID VARIABLE STARS: A Cepheid variable or Cepheid is a member of a particular class of very luminous, massive variable stars with pulsation periods of 1-70 days. ... The relationship is calibrated using data collected from Cepheids whose distances are determined by other means. ... Browse through the 68 CCD fits images he sent you, using ds9 and locate the Cepheid variable. ... Image credits: ESA - "http://sci.esa.int/science-e-media/img/20/cepheid-variables.jpg" . ...

Next: NICMOS/HST H-band (F160W) Images Up: NICMOS Science Previous: HST NICMOS Observations of . ... Observations of P . ... The NICMOS team has devised a comprehensive program of observations of the Galactic Center. ... Data in hand give a first look at variability and a detailed look at the search for the tip of the main sequence will be discussed where NICMOS has demonstrated adequate sensitivity and photometric precision to identify likely O8-B1 stars at the Galactic Center. ...

... 371Gregory Taylor . ... We persent a catalog of 1274 discrete sources detected during a 5 yr, 6 cm, radio-patrol survey of the galactic plane for variavle sources. ... Seventy-five percent of the sources are weaker than 75 mJy, and as a consequence reliable sources and 27 possible variables were detected, of which 64 % exhibited shirt-term variability. ... A comparison with previous centimeter variability studies suggests the possible existence of two distinnct variability components. ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Information & tools for observers . ... Binary stars and variable stars are two extremely important groups of celestial objects. Observations of binary stars have allowed astronomers to determine the masses of stars and provided a wealth of information on the density, atmosphere and evolution of stars. ... The study of binary and variable stars reveals vital information about stars . ...

... Tonight's Sky . ... Search By Name Enter coordinates Use current location . ... Observing . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... How do astronomers use Cepheid variables to measure distances? ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... astro-ph . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... Quasar Variability in the Framework of Poissonian Models . ... It is shown that in this very general framework the well established anti-correlation between variability amplitude and wavelength can only be understood as an effect of an underlying spectral component which remains stable on long time-scales, and is redder than the variable component. ...

... 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 . ...

Selected (two) topical problems in solar / stellar modelling Stellar Astrophysics Centre Improving solar physics by studying other stars GЭnter Houdek The effect of the surface layers on the oscillation frequencies Asteroseismic ages and heavy-element abundances of the Sun solar-like stars Courtesy of J. Christensen-Dalsgaard IAU-GA-SP13 ­ Beijing ­ August 2012 Observed solar frequencies m-averaged frequencies from MDI instrument on SOHO Observed ...

... 2.3 Establishing the Extragalactic Distance Scale . ... 2.3.2 The Second Rung: Distances to stellar clusters . ... 2.3.4 Distances to Local Group Galaxies . ... The Luminosity Function of Planetary Nebulae . ... 3.2.2 Clusters of Galaxies . ... 4.2 Evidence for Dark Matter as a Function of Scale Size . ... 4.3 Other Dark Matter Indicators for Galaxies . ... What is the nature of the large-scale distribution of matter in the universe as traced by the three-dimensional galaxy distribution? ...

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 2002 > cosmology2002 . ... Observing with ESO Telescopes . ... Public Surveys . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... Review: Weak Lensing . ... Tangential alignement of galaxies in a STIS Parallel shear survey field: a new dark lens candidate . ... Poster: . ... New Clues on clustering evolution from the K20 and FIRES surveys . ... data ...

... Briefly, the count rate at the detector from a source at a redshift z is . ... Another possible way that could lead to arising diverse peculiarities in the - distribution induced by the sources evolution is connected with a possible non-monotonic character of the star formation rate in galaxies. ... The most prominent feature of the obtained theoretical - is a notable sharp increase at low count rates due to evolutionary effects. ...

... We have observed and studied critical supercurrents, Ic, in cross-type Nb-Cu/Ni-Nb junctions with Josephson layers prepared from diluted ferromagnetic alloys. For suitable values of the exchange energy in the ferromagnet and the F-layer thickness we have observed Ic(T) oscillation with vanishing Ic for the definite values of T and dF. ... Critical supercurrents, Ic, in Nb-Cu(1-x)Ni(x)-Nb Josephson SFS junctions with F-layers prepared from ferromagnetic Cu(1-x)Ni(x) alloys have been studied. ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

Proposal Identification No.: ... Proposal Type: General Category: Sub-Category: Observation Category: Time Requested this semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time : Expected Data Storage: Prop osal Title: ABSTRACT: We have recently realized a technique for measuring electron density fluctuations in the Sun's corona and found many interesting results, including: periodic fluctuations in electron column ...

... Our Galaxy . ... Universe . ... One of the Hubble Space TelescopeтАЩs goals was to accurately observe Cepheids in the most distant galaxies known (we knew they were far away, the problem was saying just how far). ... This work is becoming ever more refined; in January this year astronomers revealed that they had identified the farthest galaxy yet seen in a Hubble image. ... Thanks to the Hubble Space TelescopeтАЩs superb observations we can say that the universe is 13.75 billion years old. ...

Magnetic activity gives rise to a number of variable phenomena in premain sequence stars, main sequence stars and binary systems for instance. Notably, flares and hot and dense outer atmospheres are most commonly observed. We need to investigate theoretically the possible spectral signatures of chromospheres so as to interpret the remarkable variety of observations, and discriminate the chromospheric counterpart to other possible contributions, such as cool coronal loops. ...

GJ 205 Other Names HD 36395 / Wolf 1453 (RA, Dec) 2000 (05:31:24.85, ­03:38:53.4) (l II b II ) (206.93, ­19.45) Spectral Type dM1.5 Distance 5.7 pc m V 7 m :98 B \Gamma V 1.5 [m=H] 0.5 ROSAT/PSPC 0.19 cts s \Gamma1 EUVE /DS 0.02 cts s \Gamma1 EUVE Observation Jan/Feb 1997 [394.1 ks] GJ 411 Other Names HD 95735 / SAO 62377 (RA, Dec) 2000 (11:03:22.58, +36:02:09.6) (l II b II ... The line strengths were computed using a solar­type Active Region DEM and a Quiet Sun DEM (Brosius et al. ...

Peremennye Zvezdy", . ... We observed six primary minima: HJD 2454712.3808, 2454713.5038, 2454774.2700, 2454774.5549, 2454776.2386, 2454776.5200. ... We observed four primary minima: HJD 2454712.2847, 2454713.5099, 2454776.2531, 2454776.5584. ... We observed five primary minima: HJD 2454713.3051, 2454714.3669, 2454773.3070, 2454776.4822, 2454778.5956. ... We observed three primary minima: HJD 2454713.3508, 2454774.2818, 2454778.5807. ... Two observed primary minima: HJD 2454713.4729, 2454776.3105. ...