Search results for "observator"

showing 10 items of 410 documents

Zvaigžņotā Debess: 2001, Rudens (173)

2001

Contents: G.Ozoliņš. Radio-Locators Investigate Solar System ; U.Dzērvītis. First Radio Star Discovered ; J.Āboliņš. Science, Dinosaurs and Evolution: Cosmos and Life on Earth ; Z.Alksne, A.Alksnis. Our Galaxy Swallows Its Companions ; A.Balklavs. New Data on Massive Objects in the Galactic Cores ; A.Balklavs. Actualities of Investigations of Dwarf Galaxies ; Z.Alksne. The Web of the Early Universe Primordial Filaments ; M.Gertāns. NEAR Mission Successfully Completed ; I.Vilks. Spaceflight. Almost Everyday Life (1973-2000) (concluded) ; J.Jaunbergs, D.Meldere. Mr. Tito’s Great Space Adventure ; N.Cimahoviča, A.Balklavs. Radio Astronomy in Latvia. How It All Happened ; J.Jansons. First Unive…

Kārlis Šteins – 90Krustvārdu mīklajautājumi rezultāti [Marsa konkurss]NEAR misijaBaltijas valstu informātikas olimpiāde BOI’2001Masīvi objekti galaktiku kodolosMarsa poli – ledus putekļiPundurgalaktikasKosmiskie lidojumi (1973-2000)Mākslīgā gravitācijaSaules pulksteņi LatvijaiGalaktiku mijiedarbībaIlumetsas meteorītu krāteriLatvijas Universitātes profesors Reinhards Siksna – 100Latvijas matemātikas olimpiāde – uzdevumiDenisa Tito lidojums kosmosāNatālija Cimahoviča – 75Dinozauri un evolūcijaRadioastronomija Latvijā – vēstureAstronoms un karavīrs Indriķis Arturs BrikmanisAgrīnais Visums – pirmatnējo šķiedru tīklsRudens zvaigznājiMaiju kultūra observatorija CičenicāAstronomiskās parādības - 2001Boriss Rjabovs – 50Ērgļa nometnes konkurss – rezultāti
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Search for First Harmonic Modulation in the Right Ascension Distribution of Cosmic Rays Detected at the Pierre Auger Observatory

2011

We present the results of searches for dipolar-type anisotropies in different energy ranges above 2.5 × 1017 eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the first harmonic modulation in the right-ascension distribution. Upper limits on the amplitudes are obtained, which provide the most stringent bounds at present, being below 2% at 99% C.L. for EeV energies. We also compare our results to those of previous experiments as well as with some theoretical expectations.

Large scale anisotripies[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Auger ExperimentAstronomyAstrophysics::High Energy Astrophysical PhenomenaPhase (waves)FOS: Physical sciencesCosmic rayAstrophysicsanisotropySURFACE DETECTOR01 natural sciencesCosmic RayAugerLarge scale anisotropiesObservatoryLarge scale anisotropie0103 physical sciences010303 astronomy & astrophysicsUltra-high energy cosmic rayCiencias ExactasHigh Energy Astrophysical Phenomena (astro-ph.HE)PhysicsPierre Auger ObservatoryFÍSICA DE PARTÍCULASUltra High Energy Cosmic Rays.010308 nuclear & particles physicsORIGINPhysics[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Astrophysics::Instrumentation and Methods for AstrophysicsFísicaAstronomy and AstrophysicsPierre Auger ObservatoryUltra-high energy cosmic raysENERGY-SPECTRUMRadiación cósmicaAnisotropíaAmplitudeHarmonicsUltra-high energy cosmic rays; Large scale anisotropies; Pierre Auger ObservatoryExperimental High Energy PhysicsComputingMethodologies_DOCUMENTANDTEXTPROCESSINGARRAYFísica nuclearRight ascensionAstrophysics - High Energy Astrophysical Phenomena
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Astronomiskajam tornim - 150

2019

Latvijas Universitātes Muzeja virtuālā izstāde „Astronomiskajam tornim – 150” veltīta labi pamanāmai Latvijas Universitātes galvenās ēkas iezīmei – Astronomiskajam tornim uz tās jumta. 2019. gadā ēkai un arī tornim apritēja 150 gadi. Rīgas Politehnikuma laikos te strādājuši dažādi ārzemju profesori, kas veica astronomiskus novērojumus un mācīja studentus. Nodibinoties Latvijas Universitātei, tornis kļuva par Astronomiskās observatorijas sastāvdaļu. Kopš 1986. gada te notiek regulāri debess spīdekļu demonstrējumi, skatītas komētas, Saules aptumsumi un citas samērā retas astronomiskas parādības. Astronomiskais tornis ir kā logs uz debesīm vairāk nekā 150 gadu garumā. Mainījušies teleskopi, no…

Latvijas Universitāte:NATURAL SCIENCES::Physics::Astronomy and astrophysics::Astronomy [Research Subject Categories]telescopesRaiņa bulvāris 19University of LatviateleskopiastronomyAstronomical ObservatoryRiga PolytechnicAstronomiskā observatorijaastronomijaAstronomiskais tornisRīgas PolitehnikumsAstronomical tower
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Zvaigžņotā Debess: 2018, Pavasaris (239)

2018

Contents: “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: A.Balklavs. Some Considerations about Communication with Extraterrestrial Civilizations (abridged) ; I.Rabinovičs. Does the Moon Affect Living Nature? (abridged) ; DEVELOPMENTS in SCIENCE: K.Schwartz. Brown Dwarfs ; DISCOVERIES: I.Pundure. Odd Movements of Star Reveal Lonely Black Hole in Globular Star Cluster ; I.Pundure. Gaia Enables Viewing Evolution of Orion Constellation over Coming 450 000 Years ; J.Kuzmanis. A Guest from Another Stars ; SPACE RESEARCH and EXPLORATION: J.Jaunbergs. To Catch the Galactic Visitor `Oumuamua ; J.Jaunbergs. Invisible Connections of Dione ; LATVIAN SCIENTISTS: The List of Popular Science Papers (1958-2016) by P…

Lielais Amerikas Saules aptumsums 2017 – novērojumi ekskursijasMelnais caurums lodveida zvaigžņu kopā NGC 3201Mazā matemātikas universitāteKarls Ch. Ulmanis – 225Latvijas ZMP «Venta-1» – pusgads orbītā“Ērglis 2017” MērsragāSaturna pavadonis Dione – zondes Cassini novērojumiF.Canders Ā.Rihters V.Zlatinskis K.Žiglēvičs – Saules aptumsums 1912Brūnie punduriKārlis Puķītis – Kārļa Kaufmaņa piemiņas stipendiātsPirmie astronomiskie novērojumi Rīgas pils tornī – 200Jānis Balodis – 80E.I.Siliņš “Lielo patiesību meklējumi” – piektais izdevumsStarpzvaigžņu asteroīds OumuamuaZeme un apelsīns – uzdevumsKompānijas SpaceX raķete Falcon HeavyDebess spīdekļi – 2018.gada pavasarisGaia – Oriona zvaigznājs nākamajos 450 000 gadosGalaktiskais viesis ‘Oumuamua – kā noķertPrivātas astronomiskas observatorijas Jelgavā un Slokā – 110A.Alkšņa populārzinātnisko darbu saraksts (1958-1980)Zvaigžņotais visums grafikas mākslā – Dzidra EzergaileCERN pārstāvji LU Astronomijas institūtā
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Zvaigžņotā Debess: 2006, Vasara

2006

Latvijas Zinātnes padome, Latvijas Universitāte

Līgatnes meteorītsMazā planēta Nr. 2867 „Steins”Krustvārdu mīklaBaldones observatorijas ģenerālais plānsStudijas Joensū universitātē SomijāZvaigžņotā debess 2006.gada vasarāHalleja komēta Rīgā – 475Latvijas matemātikas olimpiāžu uzdevumiLādiņsaites matrica Baldones Šmitam – pirmie uzņēmumiDubultsauleGalaktikas difūzā rentgenstarojuma avotiAstronomija LU 64.zinātniskajā konferencēMerkurs – dzelzs planētaLatvijas Zinātņu akadēmijas Observatorija (1946-1996)Tumšās enerģijas dabaMazmasīvas citplanētasGuseva krāters uz MarsaPilns Saules aptumsums – 1981. gada 31.jūlijs KopjevaJāzeps EidussLokālā galaktiku grupaBervalds EdgarsAstronomijas nometne „Ērgļa Pī”Debess aizsardzība ČīlēKomētas 1881 III novērojumiem – 125Latvijas Zinātņu akadēmijas Radioastrofizikas observatorijaSaules un Mēness aptumsumu veidiDenderas zodiaksCeļš uz “Paradīzi” AntaljāNakts debess aizsardzībaAstrofizikas observatorijas aizsargjosla (Baldone Riekstukalns)Pilns Saules aptumsums - novērojumi - 2006. gada 29. marts Ēģipte Turcija Latvija
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Multimessenger search for sources of gravitational waves and high-energy neutrinos: Initial results for LIGO-Virgo and IceCube

2014

Made available in DSpace on 2022-04-29T07:21:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-11-17 We report the results of a multimessenger search for coincident signals from the LIGO and Virgo gravitational-wave observatories and the partially completed IceCube high-energy neutrino detector, including periods of joint operation between 2007-2010. These include parts of the 2005-2007 run and the 2009-2010 run for LIGO-Virgo, and IceCube's observation periods with 22, 59 and 79 strings. We find no significant coincident events, and use the search results to derive upper limits on the rate of joint sources for a range of source emission parameters. For the optimistic assumption of …

MECHANISMPhysics and Astronomy (miscellaneous)AstrophysicsFOLLOW-UP OBSERVATIONSASTROPHYSICAL SOURCESIceCubeneutrinoDetection of gravitational waveGravitational waves neutrinoObservatory[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]QCLIGO Scientific CollaborationQBPhysicsGAMMA-RAY BURSTS[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Settore FIS/01 - Fisica SperimentaleAstrophysics::Instrumentation and Methods for AstrophysicsASTRONOMYNuclear and High Energy Physics; Physics and Astronomy (miscellaneous)NEUTRINOSNeutrino detectorComputingMethodologies_DOCUMENTANDTEXTPROCESSINGNeutrinoSENSITIVITYGIANT FLARENuclear and High Energy Physics[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]95.85.RyMUON NEUTRINOSAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Cosmology and Extragalactic AstrophysicsACCELERATIONGravitational wavesGeneral Relativity and Quantum CosmologyINSTABILITIESSettore FIS/05 - Astronomia e AstrofisicaCORE-COLLAPSE SUPERNOVAE[ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]ddc:530SDG 7 - Affordable and Clean EnergyCORE-COLLAPSEDETECTOR/dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energyGravitational wave95.85.SzMAGNETIZED NEUTRON-STARS[ PHYS.ASTR.HE ] Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]AstronomyTRANSIENTS95.85.Sz; 95.85.RyRELATIVISTIC STARSLIGOPhysics and Astronomy[ SDU.ASTR.HE ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Gamma-ray burstEMISSIONEnergy (signal processing)
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Conceptual design of the International Axion Observatory (IAXO)

2014

The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO will look for axions or axion-like particles (ALPs) originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal-to-noise ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, currently the most powerful axion helioscope, reaching sensitivity to axion-photon couplings down to a few $\times 10^{-12}$ GeV$^{-1}$ and thus probing a large fraction of the currently unexplored axion and ALP parameter space. IAXO will also be sensitive to solar axions produced by mechanisms mediated by the axion-electron coupling $g_{…

MICROPICPhysics - Instrumentation and DetectorsPhotonaxionsParameter space7. Clean energyHigh Energy Physics - ExperimentDark Matter detectors (WIMPs axions etc.)High Energy Physics - Experiment (hep-ex)Observatoryetc.)Micropattern gaseous detectors (MSGC GEM THGEM RETHGEM MHSP MICROPIC MICROMEGAS InGrid etc)Detectors and Experimental TechniquesInstrumentationMathematical PhysicsPhysicsGEMsolar [axion]Dark Matter Detectors (Wimps Axions etc.)MicroMegas detectorX-ray detectorsInstrumentation and Detectors (physics.ins-det)Dark Matter detectors (WIMPs axions etc.); Large detector systems for particle and astroparticle physics; Micropattern gaseous detectors (MSGC GEM THGEM RETHGEM MHSP MICROPIC MICROMEGAS InGrid etc); X-ray detectors; Instrumentation; Mathematical PhysicssolarobservatoryMICROMEGASMHSPaxion-like particlesproposed experimentaxions ; dark matter detectors ; x-ray detectors ; Micropattern gaseous detectors ; large detector systems for particle and astroparticle physicsMicromegasX-ray detectorParticle physicsoptics [X-ray]FOS: Physical sciencesSuperconducting magnetMicropattern gaseous detectors (MSGCddc:610Axionactivity reportDark Matter detectors (WIMPssuperconductivity [magnet]etc)HelioscopeLarge detector systems for particle and astroparticle physicssensitivityInGridRETHGEMOrders of magnitude (time)axionLarge detector systems for particle and astroparticle physicTHGEMMicropattern Gaseous Detectors (MSGC Gem THGEM Rethgem MHSP Micropic Micromegas In Grid; etc)
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Simulating AIA observations of a flux rope ejection

2014

D.H.M. would like to thank STFC, the Leverhulme Trust and the European Commission’s Seventh Framework Programme (FP7/2007-2013) for their financial support. P.P. would like to thank the European Commission’s Seventh Framework Programme (FP7/2007-2013) under grant agreement SWIFF (project 263340, http://www.swiff.eu) and STFC for financial support. These results were obtained in the framework of the projects GOA/2009-009 (KU Leuven), G.0729.11 (FWO-Vlaanderen) and C 90347 (ESA Prodex 9). The research leading to these results has also received funding from the European Commission’s Seventh Framework Programme (FP7/2007-2013) under the grant agreements SOLSPANET (project No. 269299, http:// ww…

Magnetohydrodynamics (MHD)corona [Sun]Sun: coronal mass ejections (CMEs)FOS: Physical sciencesAstrophysicsmagnetohydrodynamics (MHD)7. Clean energyProminencesObservatoryRadiative transferQB AstronomyAstrophysics::Solar and Stellar AstrophysicsQA MathematicsQASun: magnetic fieldsSolar and Stellar Astrophysics (astro-ph.SR)QBPhysicsUV radiation [Sun]Line-of-sightSun: coronaAstronomy and AstrophysicsPlasmaSun: UV radiationCoronacoronal mass ejections (CMEs) [Sun]Magnetic fluxSun: filamentsAstrophysics - Solar and Stellar Astrophysicsmagnetic fields [Sun]13. Climate actionSpace and Planetary ScienceExtreme ultravioletPhysics::Space Physicsfilaments prominences [Sun]Rope
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Zvaigžņotā Debess: 2010, Vasara (208)

2010

Contents: N.Cimahoviča. Sun’s Researcher in the Far East ; A.Balklavs. A New Hypothesis on Formation of Galaxies ; A.Balklavs. Gravitation and Peculiar Galaxies ; A.Barzdis. First Population Stars and Galaxies ; Z.Alksne, A.Alksnis. Does Giant Planet Orbit Dwarf Star? ; A.Alksnis, Z.Alksne. Epsilon Aurigae Eclipsed by Dark Dust Disk ; M.Ābele, K.Adgere, E.Grabs, L.Osipova, E.Rutkovska, J.Vjaters, V.Veckalns. Latvian Students Take Part in the Project European Student Moon Orbiter ; Announcement on the 3rd International Symposium on Dark-Sky Parks: 6-10 September 2010, Croatia ; J.Jansons. Vladimir Afanasjev – Officer of the Baikonur Cosmodrom in the 1970s ; J.Limansky. The International Year…

Milzu planēta ap pundurzvaigzniStarptautiskā vasaras skola Rozhen BulgārijāViduslaiki un zinātneVaris Karitāns – SPIE stipendijaArturs Balklavs “Latvijas astronomija pēc Trešās atmodas”Latvijas studenti ESMO projektāAstrofest 2010KristietībaPirmās paaudzes zvaigznes galaktikasSaules Dinamikas observatorijaAstronomijas vēsture – Rīgas kalendāriPasaules iekārtojums Raiņa dzejāLatvijas astronomija - vēstureMārtiņs Gills – Artura Balklava balvaLeonids Roze (20.05.1925. – 1.06.2009.)Starptautiskais simpozijs Dark-Sky Parks HorvātijāPirmie cilvēki kosmosā – pastmarkasMarss – gaismas naktīVedēja Epsilona aptumsumsAstronomiskie novērojumiStarptautiskais astronomijas gads 2009 filatēlijā – sērija EUROPAAstronomiskās parādības - 2010Baikonuras kosmodroma virsnieks Vladimirs AfanasjevsAstrofiziķis Uldis Dzērvīte – 75 gadiRozeta – Lutēcija
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Zvaigžņotā Debess: 2021, Vasara (252) 

2021

Mobīlā lietotneKopernika zinātnes centrs - planetārijsAstronomiskie pulksteņiSaules sistēmaIlga Daube - In memorian:NATURAL SCIENCES::Physics::Astronomy and astrophysics::Astronomy [Research Subject Categories]Visuma izpēteBaldones Astrofizikas observatorijaDebess apskatsGlobālās navigācijas satelītu sistēmaGredzenveida galaktika
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