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Просмотр по теме "Quasars: general"

Просмотр по теме "Quasars: general"

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  • A study of the synchrotron component in the blazar spectral energy distributions 
    Mingaliev M.; Sotnikova Y.; Mufakharov T.; Erkenov A.; Udovitskiy R. (2015)
    © Pleiades Publishing, Ltd., 2015. We study the synchrotron component of nonthermal radiation of blazars using the spectral energy distribution (SED). The sample contains a total of 877 blazars, including 423 flat-spectrum ...
  • Flux-density measurements of the high-redshift blazar PSO J047.4478+27.2992 at 4.7 and 8.2 GHz with RATAN-600 
    Mufakharov T.; Mikhailov A.; Sotnikova Y.; Mingaliev M.; Stolyarov V.; Erkenov A.; Nizhelskij N.; Tsybulev P. (2021)
    We report the first detection at 4.7 and 8.2 GHz with the RATAN-600 radio telescope of the source PSO J047.4478+27.2992, which has been announced as a blazar at z = 6.1. The average flux densities are 12 ± 3 and 8 ± 4 mJy ...
  • Impact of quasar proper motions on the alignment between the International Celestial Reference Frame and the Gaia reference frame 
    Неизвестный автор (2018)
    © 2017 The Author(s). The International Celestial Reference Frame (ICRF) is currently realized by the very long baseline interferometry (VLBI) observations of extragalactic sources with the zero proper motion assumption, ...
  • Multifrequency studies of the peculiar QUASAR 4C +21.35 during the 2010 flaring activity 
    Ackermann M.; Ajello M.; Allafort A.; Antolini E.; Barbiellini G.; Bastieri D.; Bellazzini R.; Bissaldi E.; Bonamente E.; Bregeon J.; Brigida M.; Bruel P.; Buehler R.; Buson S.; Caliandro G.; Cameron R.; Caraveo P.; Cavazzuti E.; Cecchi C.; Chaves R.; Chekhtman A.; Chiang J.; Chiaro G.; Ciprini S.; Claus R.; Cohen-Tanugi J.; Conrad J.; Cutini S.; D'Ammando F.; De Palma F.; Dermer C.; Do Couto E Silva E.; Donato D.; Drell P.; Favuzzi C.; Finke J.; Focke W.; Franckowiak A.; Fukazawa Y.; Fusco P.; Gargano F.; Gasparrini D.; Gehrels N.; Giglietto N.; Giordano F.; Giroletti M.; Godfrey G.; Grenier I.; Guiriec S.; Hayashida M.; Hewitt J.; Horan D.; Hughes R.; Iafrate G.; Johnson A.; Knödlseder J.; Kuss M.; Lande J.; Larsson S.; Latronico L.; Longo F.; Loparco F.; Lovellette M.; Lubrano P.; Mayer M.; Mazziotta M.; McEnery J.; Michelson P.; Mizuno T.; Monzani M.; Morselli A.; Moskalenko I.; Murgia S. (2014)
    © 2014. The American Astronomical Society. All rights reserved. Printed in the U.S.A. The discovery of rapidly variable Very High Energy (VHE; E > 100 GeV) γ -ray emission from 4C +21.35 (PKS 1222+216) by MAGIC on 2010 ...
  • Multiwavelength behaviour of the blazar OJ 248 from radio to γ -rays 
    Carnerero M.; Raiteri C.; Villata M.; Acosta-Pulido J.; D'Ammando F.; Smith P.; Larionov V.; Agudo I.; Arévalo M.; Arkharov A.; Bach U.; Bachev R.; Benítez E.; Blinov D.; Bozhilov V.; Buemi C.; Bueno Bueno A.; Carosati D.; Casadio C.; Chen W.; Damljanovic G.; Di Paola A.; Efimova N.; Ehgamberdiev S.; Giroletti M.; Gómez J.; González-Morales P.; Grinon-Marin A.; Grishina T.; Gurwell M.; Hiriart D.; Hsiao H.; Ibryamov S.; Jorstad S.; Joshi M.; Kopatskaya E.; Kurtanidze O.; Kurtanidze S.; Lähteenmäki A.; Larionova E.; Larionova L.; Lázaro C.; Leto P.; Lin C.; Lin H.; Manilla-Robles A.; Marscher A.; McHardy I.; Metodieva Y.; Mirzaqulov D.; Mokrushina A.; Molina S.; Morozova D.; Nikolashvili M.; Orienti M.; Ovcharov E.; Panwar N.; Pastor Yabar A.; Puerto Giménez I.; Ramakrishnan V.; Richter G.; Rossini M.; Sigua L.; Strigachev A.; Taylor B.; Tornikoski M.; Trigilio C.; Troitskaya Y.; Troitsky I.; Umana G.; Valcheva A.; Velasco S.; Vince O.; Wehrle A.; Wiesemeyer H. (2015)
    © 2015 The Authors. We present an analysis of the multiwavelength behaviour of the blazar OJ 248 at z = 0.939 in the period 2006-2013. We use low-energy data (optical, near-infrared, and radio) obtained by 21 observatories ...
  • Optical and radio variability of BL Lacertae 
    Gaur H.; Gupta A.; Bachev R.; Strigachev A.; Semkov E.; Wiita P.; Volvach A.; Gu M.; Agarwal A.; Agudo I.; Aller M.; Aller H.; Kurtanidze O.; Kurtanidze S.; Lähteenmäki A.; Peneva S.; Nikolashvili M.; Sigua L.; Tornikoski M.; Volvach L. (2015)
    © ESO, 2015. Context. We extensively observed the prototype blazar, BL Lacertae, in optical and radio bands during an active phase in the period 2010-2013 when the source showed several prominent outbursts. We searched for ...
  • The third realization of the International Celestial Reference Frame by very long baseline interferometry 
    Charlot P.; Jacobs C.S.; Gordon D.; Lambert S.; De Witt A.; Böhm J.; Fey A.L.; Heinkelmann R.; Skurikhina E.; Titov O.; Arias E.F.; Bolotin S.; Bourda G.; Ma C.; Malkin Z.; Nothnagel A.; Mayer D.; Macmillan D.S.; Nilsson T.; Gaume R. (2020)
    © P. Charlot et al. 2020. A new realization of the International Celestial Reference Frame (ICRF) is presented based on the work achieved by a working group of the International Astronomical Union (IAU) mandated for this ...
  • Variability of the blazar 4C 38.41 (B3 1633+382) from GHz frequencies to GeV energies 
    Raiteri C.; Villata M.; Smith P.; Larionov V.; Acosta-Pulido J.; Aller M.; D'Ammando F.; Gurwell M.; Jorstad S.; Joshi M.; Kurtanidze O.; Lähteenmäki A.; Mirzaqulov D.; Agudo I.; Aller H.; Arévalo M.; Arkharov A.; Bach U.; Benítez E.; Berdyugin A.; Blinov D.; Blumenthal K.; Buemi C.; Bueno A.; Carleton T.; Carnerero M.; Carosati D.; Casadio C.; Chen W.; Di Paola A.; Dolci M.; Efimova N.; Ehgamberdiev S.; Gómez J.; González A.; Hagen-Thorn V.; Heidt J.; Hiriart D.; Holikov S.; Konstantinova T.; Kopatskaya E.; Koptelova E.; Kurtanidze S.; Larionova E.; Larionova L.; León-Tavares J.; Leto P.; Lin H.; Lindfors E.; Marscher A.; McHardy I.; Molina S.; Morozova D.; Mujica R.; Nikolashvili M.; Nilsson K.; Ovcharov E.; Panwar N.; Pasanen M.; Puerto-Gimenez I.; Reinthal R.; Richter G.; Ros J.; Sakamoto T.; Schwartz R.; Sillanpää A.; Smith N.; Takalo L.; Tammi J.; Taylor B.; Thum C.; Tornikoski M.; Trigilio C.; Troitsky I.; Umana G.; Valcheva A.; Wehrle A. (2012)
    Context. After years of modest optical activity, the quasar-type blazar 4C 38.41 (B3 1633+382) experienced a large outburst in 2011, which was detected throughout the entire electromagnetic spectrum, renewing interest in ...

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