CONSTRAINING LONG-TERM AND SPATIAL VARIABILITY OF THE PN LOW ENERGY RESPONSE WITH RXJ1856 (IUSS Pavia; INAF, IASF-Milano) In collaboration with: N. Sartore, S. Mereghetti, A. De Luca, R. Turolla, F. Haberl Andrea Tiengo RX J1856.5-3754 (RXJ1856) Brightest of the "Magnificent Seven", or X-ray Dim Isolated Neutron Stars (XDINSs) (e.g. Turolla 2009 f or a review) The closest known neutron star: d ~120 pc (W alter et al. ... 2011) Why studying RXJ1856 variability? ...

Astronomes Amateurs du Luxembourg a.s.b.l. " We bring the Universe to you ! Founded in 1971 by a group of enthusiasts and star aficionados, our association is now counting more than 130 members.As a national association we attract hobby astronomers from the whole country to our regular night-sky observations and to the meetings in our club at Dudelange. ... by topic : PDF File Download (360KB) . ... Article about AAL in "Le Quotidien" newspaper of Juli 21 2005 - PDF File Download (132KB) . ...

NOTE: The storm sudden commencement data file was updated on 18 Feb 1998. o Revised data for 1968-1975 were taken from IAGA Bulletin No. ... Indices aa and storm sudden commencements"; see also IAGA Bulletin 39: " Supplementary Geomagnetic Data 1957-1975", including a new list of ssc's 1968-1975). ... From the monthly reports of Rapid Variations prepared by 43 magnetic observatories (see list page 121), a combined list of all events is compiled. ...

... Oleg V. Verkhodanov . ... The last few years have changed our view on the evolution of galaxies: the most distant galaxies (i.e. systems having stellar population) have been found at redshift z=6.68 (Chen H.-W., Lanzetta, K. M., Pascarelle, S. 1999, Nature, 398 , 586) and radio galaxy at z=5.19 (van Breugel W., De Breuck C., Stanford S. A., Stern D., Rottgering H., Miley G. 1999. astro-ph/9904272 ). ... Redshifts and age of stellar systems of distant radio galaxies from multicolour photometry data. ...

... Russian version . ... M. G. GAVRILOV . Olympiads on Astronomy and Space Physics . Collection of astronomical problems with solutions and explanations . ... BBK 22.6 G 12 UDK 37:[52+53] (076.1) G 12 Gavrilov M.G. / Zviozdnyj Mir: Sbornik zadach po astronomii i kosmicheskoj fizike. ... Here is volume IV - problems of the Olympiads of Scientific Centre in Chernogolovka (former Noginsk Scientific Centre). ... The scientific problems are, as a rule, less formal and fairly difficult. ...

... 1) Variation of Mumford quotients by torus actions on full flag varieties I, Izv. ... Mat., 2007, 71:6, 29­46. 2) Variation of Mumford quotients by torus actions on full flag varieties II, Mat. ... 3) Separating Systems of Weyl Chambers (in collaboration with D. V. Mironov), Mat. ... 5) On Waldspurger theorem (in collaboration with P. V. Bibikov), UMN 64:5 (389), 2009. 6) On Tilings Defined by Discrete Reflection groups, (in collaboration with P. V. Bibikov), to appear Izvestiya RAN. ...

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. ...

... PUBLIC LECTURE - APRIL 12, 2016 . New Discoveries in the Outer Solar System: Ceres, Pluto and Planet X . ... Dr. Green will talk about "New Discoveries in the Outer Solar System: Ceres, Pluto, and Planet X". ... Beginning in 1992 planetary astronomers began to find Pluto like objects beyond the orbit of Neptune showing us that Pluto was a member of an entirely new family of objects we now call the Kuiper Belt. ... Amateur Astronomers Association of Princeton, Inc., ...

Blackholes Forum Message . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums | Blackholes I | ... There Are Two Different Situations Here! Forum List | ... Back to Thread Topics | ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Scale-heights of the Galactic disk subsytems with different ages and metallicities . V.Marsakov & Yu. ... It is based on the fact, that all stars cross the disk plane several times during their Galactic orbital period. ... We have used our representative sample of nearby disk F2-G2 stars Marsakov & Shevelev (1995) in which fundamental stellar parameters was determined on the basis of published date on uvby-photometry, proper motion and radial velocities. ... Marsakov V.A., Shevelev Yu.G. Bull. ...

arxiv:1002.4415 Ограничения на космологический сигнал от аннигиляции темной материи по данным Fermi-LAT об изотропном гамма-фоне (Constraints on Cosmological Dark Matter Annihilation from the Fermi-LAT Isotropic Diffuse Gamma-Ray Measurement) . Authors: The Fermi-LAT collaboration . arxiv:1002.3205 Обнаружение задержанного ГэВного излучения от короткого гамма-всплеска 081024B по данным Ферми (Fermi detection of delayed GeV emission from the short GRB 081024B) . ... Authors: B. Scott Gaudi ...

... Under certain conditions, like those in the nucleus of a QSO, all atoms can be made to emit light at particular wavelengths. ... If that source is approaching the observer, the wave is squashed up onto itself making the wavelength shorter. ... This is redshift. ... You can see how the section of the QSO spectrum which we observe changes with redshift. ... We then see how far we had to slide the observed spectrum along the scale to make it match and that is the objects redshift. ... The 2QZ team . ...

11 august 2014/Monday: Arriving, Registration . ... The variation of solar flare coronal X-ray source spatial properties. ... Melnikov V.F., Charikov Yu.E., Kudriavtsev I.V. Directivity of X-ray and gamma-ray emission from different parts of flaring magnetic loops. ... E., Melnikov V.F. Angular characteristics of polarization degree of hard X-ray emission from different parts of flaring magnetic loops. ... The thick target model and analytical calculations of the hard X-ray emission from solar flares. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Le plus puissant acc†йl†йrateur de particules de la Galaxie identifi†й . ... Le trou noir de 4 millions de masses solaires qui occupe le centre de la Voie lact†йe est tr†иs probablement la source des plus puissants rayons cosmiques produits dans la Galaxie. ...