... HST . ... Data . ... HST Overview . Overview . ... Cycle 24 Announcement . ... Retrieving HST Data . ... Instruments . ... Grism Spectroscopy . ... UVIS Flats . ... Instrument Handbook . Data Handbook . ... The Wide Field Camera 3 (WFC3) is a fourth-generation UVIS/IR imager aboard the Hubble Space Telescope (HST). WFC3 was installed in May 2009 during HST servicing mission 4, and replaces the Wide Field Planetary Camera 2 (WFPC2). ... ISR 2016-09: WFC3 Cycle 22 Proposal 14007: UVIS Gain . ...

... It was believed that the inside of the Earth was magnetized in the same fashion, and scientists were greatly puzzled when they found that the direction of the compass needle at any place slowly shifted, decade by decade, suggesting a slow variation of the Earth's magnetic field. ... Edmond Halley (of comet fame) ingeniously proposed that the Earth contained a number of spherical shells, one inside the other, each magnetized differently, each slowly rotating in relation to the others. ...

... Summary of reduced ISAAC fields . ... This data release includes eight fully reduced VLT/ISAAC fields in J,H,K s bands covering 50 arcmin 2 of the GOODS region in the Chandra Deep Field South (CDFS). ... 8 ISAAC fields) . ... The 8 ISAAC fields which are part of this data release are superimposed onto a SOFI image (J+K) (part of a previous EIS data release). ... In one case (GOODS field 11/J-band), for which not enough standard stars were available, the ZP was boostrapped from previous SOFI/EIS data...

... Можаровский Сергей Григорьевич - зав.лабораторией солнечных магнитных полей УАФО . ... Физика Солнца / Solar Physics . ... программный комплекс для моделирования образования профилей Стокса фраунгоферовых линий . ... Можаровский С.Г. Об эквивалентности отклика крыльев спектральных линий на малые изменения величин напряженности магнитного поля и лучевых скоростей. ... Можаровский С.Г. О влиянии градиентов магнитного поля и лучевой скорости на эффективные глубины отклика крыльев спектральных линий. ...

Nowadays at the Department the experimental and theoretical investigations, including astronomical and ionospheric observations, active experiments with space vehicles are taking place. ... Solar Corona physics and erruptive phenomenae. ... Stellar astronomy. ... The Department has organized and put into practice more then 50 expeditions for observation of Solar ecllipces, aurorae polaris, comets, meteor streams, controlled space experiments, and also for investigations of geophysical characteristics. ...

... Rashba, T.I. ; Semikoz, V.B.; Valle, J. W. F., ?Radiative zone magnetic fields and g-modes in the Sun?, ... V.B. Semikoz, D.D. Sokoloff, ?Large ?Scale Magnetic Field Generation by ? ... V.B. Semikoz, D.D. Sokoloff, ?Magnetic helicity and cosmological magnetic field?, ... V.B. Semikoz, D.D. Sokoloff, ?Large-scale cosmological magnetic field?, ... V.B. Semikoz, D.D. Sokoloff, J.W.F. Valle, ?Is the baryon asymmetry of the Universe related to galactic magnetic fields?? ...

... A second method to account for illumination problems in the flat fields is to remove the large scale pattern from the flat field itself. This is useful if there are no reasonable blank sky calibration frames and the astronomical exposures are evenly illuminated but the flat fields are not. ... Obviously, after having obtained the illumination corrected flat field it is reasonable to replace the original flat fields by the corrected flat fields in the reduction table. ...

Tsfasman and Vl\u adu\c t defined the set of invariants $\{\phi_q, q \text{ is a prime power, } \mathbb{R} \text{ or }\mathbb{C}\}$ of infinite global fields, but the properties of this sets are still not known. ... In this direction, I will talk about the constructions of infinite global fields having $n$ prescribed non-zero invariants, and of others having $n$ prescribed zero invariants. ...

... In typical nightly use, the wide field and planetary telescope and cameras record images of favorably placed objects in the sky, including constellations, bright variable stars, nebulae through narrow-band filters, comets, the Moon, and planets. ... Shared Skies telescopes are available for use by students at the University of Louisville and the University of Southern Queensland, and by teachers and students in middle and high schools mentored by faculty at the universities. ...

... Takuya Akahori "Faraday Rotation Measure due to the Intergalactic Magnetic Field" . Shae Brown "Cross-correlation of ATLAS and Spitzer-SWIRE Surveys: Probing intergalactic magnetic fields" . Roger Clay "Using low energy cosmic rays to investigate local galactic magnetic fields" . Roland Crocker "A new lower limit on the magnetic field around the Galactic Centre" . ... JinLin Han "Rotation measures of pulsars and radio sources for Galactic magnetic fields" . ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... Star Atlas . ... stars . ... Observing Podcasts . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... How do neutron stars generate steady magnetic fields? ... How can a neutron star exist if those neutrons are just going to pieces? Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

I-GALFA Survey Fields . ... Most I-GALFA fields are observed by ``nodding'' the telescope north and south along the meridian to trace out a zig-zag pattern on the sky as the Earth rotates. ... The I-GALFA fields fill the AO DEC range and overlap with each other by 20', with one field 3 degrees wide at the zenith and four others 9.3 degrees wide covering the rest of the survey. ... The LST range of each field is shown in blue. ... Field . ... The I-GALFA fields are shown in Galactic coordinates below. ...

You can sort a file on several fields with the same sort command. The file is sorted on the first field; if some lines have the same value for this field they are sorted on the next field you specify and so on. ... Each field is separated by a space. ... sort -o results +3 -5 scores . ... From the first sort on field 4 (age) sort finds that Rice and Bramley are the same age so it now sorts these two lines on field 5 (score), placing Rice (67) before Bramley (75). ...

... Bojan Nikolic web pages home . ... I've uploaded a new version the "bnlib" library that amongst other items contains the code to generate very large simulations of turbulent fields. ... http://www.mrao.cam.ac.uk/~bn204/alma/memo-turb.html#Current+version+of+library%3A+V1.3 . ... http://www.mrao.cam.ac.uk/~bn204/publications/2008/ALMASim08.pdf . Please enable JavaScript to view the comments powered by Disqus. blog comments powered by Disqus . Copyright 2012, Bojan Nikolic feedback welcome ...

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... Astronomers of the SAO together with an international group of scientists have proposed an explanation to the long-standing mystery of why magnetic fields are more common amongst cool white dwarf stars than amongst young and hotter ones. ... As the result magnetic white dwarfs demonstrate excess in their frequencies in the temperature range below 14000K. The authors also show that the strongly magnetic white dwarfs are of the oldest stars of the Galaxy originated from intermediate-mass relic stars. ...

... Dark Sun Sizzling . ... Even on a normal day, our Sun is sizzling ball of seething hot gas . Unpredictably, regions of strong and tangled magnetic fields arise, causing sunspots and bright active regions . ... Since only active regions emit significant amounts of energetic ultraviolet light, most of the Sun appears dark. ... NASA Official: Jay Norris. ... Публикации с ключевыми словами: ultraviolet - Sun - Ультрафиолетовое излучение - Солнце - Солнечная вспышка - магнитное поле Солнца . ...

... 2 Magnetic Field . ... A magnetized bar has its power concentrated at two ends, its poles ; they are known as its north (N) and south (S) poles, because if the bar is hung by its middle from a string, its N end tends to point northwards and its S end southwards. ... That flow became known as an electric current . ... An electric current produced a magnetic force! ... The fundamental nature of magnetism was not associated with magnetic poles or iron magnets, but with electric currents . ...

. Go Here for Hubble Ultra Deep Field . ___________________________________________________________________ The Electronic Universe Project e-mail: nuts@moo.uoregon.edu

SAS home . ... EPIC background spectra are normally extracted from regions of the observation field-of-view, once "contamination" due to individual discrete celestial sources has been removed. ... In order to cope with this situation, blank sky event lists can be downloaded from the XMM-Newton Science Operations Center web site. ... It is in principle possible as well to extract background spectra from blank field event lists, if the spectrum accumulation regions are defined in sky coordinates. ...