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  • AGILE, Fermi, Swift, and GASP/WEBT multi-wavelength observations of the high-redshift blazar 4C +71.07 in outburst 
    Vercellone S.; Romano P.; Piano G.; Vittorini V.; Donnarumma I.; Munar-Adrover P.; Raiteri C.; Villata M.; Verrecchia F.; Lucarelli F.; Pittori C.; Bulgarelli A.; Fioretti V.; Tavani M.; Acosta-Pulido J.; Agudo I.; Arkharov A.; Bach U.; Bachev R.; Borman G.; Butuzova M.; Carnerero M.; Casadio C.; Damljanovic G.; D'Ammando F.; Di Paola A.; Doroshenko V.; Efimova N.; Ehgamberdiev S.; Giroletti M.; Gómez J.; Grishina T.; Järvelä E.; Klimanov S.; Kopatskaya E.; Kurtanidze O.; Lähteenmäki A.; Larionov V.; Larionova L.; Mihov B.; Mirzaqulov D.; Molina S.; Morozova D.; Nazarov S.; Orienti M.; Righini S.; Savchenko S.; Semkov E.; Slavcheva-Mihova L.; Strigachev A.; Tornikoski M.; Troitskaya Y.; Vince O.; Cattaneo P.; Colafrancesco S.; Longo F.; Morselli A.; Paoletti F.; Parmiggiani N. (2019)
    © ESO 2019. Context. The flat-spectrum radio quasar 4C +71.07 is a high-redshift (z = 2.172), γ-loud blazar whose optical emission is dominated by thermal radiation from the accretion disc. Aims. 4C +71.07 has been detected ...
  • Blazar spectral variability as explained by a twisted inhomogeneous jet 
    Raiteri C.; Villata M.; Acosta-Pulido J.; Agudo I.; Arkharov A.; Bachev R.; Baida G.; Benítez E.; Borman G.; Boschin W.; Bozhilov V.; Butuzova M.; Calcidese P.; Carnerero M.; Carosati D.; Casadio C.; Castro-Segura N.; Chen W.; Damljanovic G.; D'Ammando F.; Di Paola A.; Echevarría J.; Efimova N.; Ehgamberdiev S.; Espinosa C.; Fuentes A.; Giunta A.; Gómez J.; Grishina T.; Gurwell M.; Hiriart D.; Jermak H.; Jordan B.; Jorstad S.; Joshi M.; Kopatskaya E.; Kuratov K.; Kurtanidze O.; Kurtanidze S.; Lähteenmäki A.; Larionov V.; Larionova E.; Larionova L.; Lázaro C.; Lin C.; Malmrose M.; Marscher A.; Matsumoto K.; McBreen B.; Michel R.; Mihov B.; Minev M.; Mirzaqulov D.; Mokrushina A.; Molina S.; Moody J.; Morozova D.; Nazarov S.; Nikolashvili M.; Ohlert J.; Okhmat D.; Ovcharov E.; Pinna F.; Polakis T.; Protasio C.; Pursimo T.; Redondo-Lorenzo F.; Rizzi N.; Rodriguez-Coira G.; Sadakane K.; Sadun A.; Samal M.; Savchenko S.; Semkov E.; Skiff B.; Slavcheva-Mihova L.; Smith P.; Steele I. (2017)
    © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Blazars are active galactic nuclei, which are powerful sources of radiation whose central engine is located in the core of the host galaxy. ...
  • Coordinated integral and optical observations of SS433 
    Cherepashchuk A.; Sunyaev R.; Fabrikat S.; Molkov S.; Barsukova E.; Antokhina E.; Irsmambetova T.; Panchenko I.; Postnov K.; Seifina E.; Shakura N.; Timokhin A.; Bikmaev I.; Sakhibullin N.; Gnedin Y.; Arkharov A.; Larionov V. (2004)
    Results of simultaneous INTEGRAL and optical observations of galactic microquasar SS433 in May 2003 are presented. The analysis of the X-ray and optical eclipse duration and hard X-ray spectra obtained by INTEGRAL together ...
  • DISCOVERY of A HIGHLY POLARIZED OPTICAL MICROFLARE in BLAZAR S5 0716+714 during the 2014 WEBT CAMPAIGN 
    Bhatta G.; Goyal A.; Ostrowski M.; Stawarz; Akitaya H.; Arkharov A.; Bachev R.; Benítez E.; Borman G.; Carosati D.; Cason A.; Damljanovic G.; Dhalla S.; Frasca A.; Hu S.; Itoh R.; Jorstad S.; Jableka D.; Kawabata K.; Klimanov S.; Kurtanidze O.; Larionov V.; Laurence D.; Leto G.; Markowitz A.; Marscher A.; Moody J.; Moritani Y.; Ohlert J.; Di Paola A.; Raiteri C.; Rizzi N.; Sadun A.; Sasada M.; Sergeev S.; Strigachev A.; Takaki K.; Troitsky I.; Ui T.; Villata M.; Vince O.; Webb J.; Yoshida M.; Zola S.; Hiriart D. (2015)
    © 2015. The American Astronomical Society. All rights reserved. The occurrence of low-amplitude flux variations in blazars on hourly timescales, commonly known as microvariability, is still a widely debated subject in ...
  • INTEGRAL observations of SS433: Results of a coordinated campaign 
    Cherepashchuk A.; Sunyaev R.; Fabrika S.; Postnov K.; Molkov S.; Barsukova E.; Antokhina E.; Irsmambetova T.; Panchenko I.; Seifina E.; Shakura N.; Timokhin A.; Bikmaev I.; Sakhibullin N.; Aslan Z.; Khamitov I.; Pramsky A.; Sholukhova O.; Gnedin Y.; Arkharov A.; Larionov V. (2005)
    Results of simultaneous INTEGRAL and optical observations of the galactic microquasar SS433 in May 2003 and INTEGRAL/RXTE observations in March 2004 are presented. Persistent precessional variability with a maximum to ...
  • MULTIFREQUENCY PHOTO-POLARIMETRIC WEBT OBSERVATION CAMPAIGN on the BLAZAR S5 0716+714: SOURCE MICROVARIABILITY and SEARCH for CHARACTERISTIC TIMESCALES 
    Bhatta G.; Stawarz; Ostrowski M.; Markowitz A.; Akitaya H.; Arkharov A.; Bachev R.; Benítez E.; Borman G.; Carosati D.; Cason A.; Chanishvili R.; Damljanovic G.; Dhalla S.; Frasca A.; Hiriart D.; Hu S.; Itoh R.; Jableka D.; Jorstad S.; Jovanovic M.; Kawabata K.; Klimanov S.; Kurtanidze O.; Larionov V.; Laurence D.; Leto G.; Marscher A.; Moody J.; Moritani Y.; Ohlert J.; Paola A.; Raiteri C.; Rizzi N.; Sadun A.; Sasada M.; Sergeev S.; Strigachev A.; Takaki K.; Troitsky I.; Ui T.; Villata M.; Vince O.; Webb J.; Yoshida M.; Zola S. (2016)
    © 2016. The American Astronomical Society. All rights reserved..Here we report on the results of the Whole Earth Blazar Telescope photo-polarimetric campaign targeting the blazar S5 0716+71, organized in 2014 March to ...
  • 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 ...
  • Synchrotron emission from the blazar PG 1553+113. An analysis of its flux and polarization variability 
    Raiteri C.; Nicastro F.; Stamerra A.; Villata M.; Larionov V.; Blinov D.; Acosta-Pulido J.; Arévalo M.; Arkharov A.; Bachev R.; Borman G.; Carnerero M.; Carosati D.; Cecconi M.; Chen W.; Damljanovic G.; Di Paola A.; Ehgamberdiev S.; Frasca A.; Giroletti M.; González-Morales P.; Griñon-Marín A.; Grishina T.; Huang P.; Ibryamov S.; Klimanov S.; Kopatskaya E.; Kurtanidze O.; Kurtanidze S.; Lähteenmäki A.; Larionova E.; Larionova L.; Lázaro C.; Leto G.; Liodakis I.; Martínez-Lombilla C.; Mihov B.; Mirzaqulov D.; Mokrushina A.; Moody J.; Morozova D.; Nazarov S.; Nikolashvili M.; Ohlert J.; Panopoulou G.; Pastor Yabar A.; Pinna F.; Protasio C.; Rizzi N.; Sadun A.; Savchenko S.; Semkov E.; Sigua L.; Slavcheva-Mihova L.; Strigachev A.; Tornikoski M.; Troitskaya Y.; Troitsky I.; Vasilyev A.; Vera R.; Vince O.; Zanmar Sanchez R. (2017)
    © 2016 The Authors.In 2015 July 29-September 1, the satellite XMM-Newton pointed at the BL Lac object PG 1553+133 six times, collecting data for 218 h. During one of these epochs, simultaneous observations by the Swift ...
  • The beamed jet and quasar core of the distant blazar 4C 71.07 
    Raiteri C.; Villata M.; Carnerero M.; Acosta-Pulido J.; Mirzaqulov D.; Larionov V.; Romano P.; Vercellone S.; Agudo I.; Arkharov A.; Bach U.; Bachev R.; Baitieri S.; Borman G.; Boschin W.; Bozhilov V.; Butuzova M.; Calcidese P.; Carosati D.; Casadio C.; Chen W.; Damljanovic G.; Di Paola A.; Doroshenko V.; Efimova N.; Ehgamberdiev S.; Giroletti M.; Gómez J.; Grishina T.; Ibryamov S.; Jermak H.; Jorstad S.; Kimeridze G.; Klimanov S.; Kopatskaya E.; Kurtanidze O.; Kurtanidze S.; Lähteenmäki A.; Larionova E.; Marscher A.; Mihov B.; Minev M.; Molina S.; Moody J.; Morozova D.; Nazarov S.; Nikiforova A.; Nikolashvili M.; Ovcharov E.; Peneva S.; Righini S.; Rizzi N.; Sadun A.; Samal M.; Savchenko S.; Semkov E.; Sigua L.; Slavcheva-Mihova L.; Steele I.; Strigachev A.; Tornikoski M.; Troitskaya Y.; Troitsky I.; Vince O. (2019)
    © 2019 The Author(s). The object 4C 71.07 is a high-redshift blazar whose spectral energy distribution shows a prominent big blue bump and a strong Compton dominance. We present the results of a 2- yr multiwavelength ...
  • The complex variability of blazars: Time-scales and periodicity analysis in S4 0954+65 
    Raiteri C.M.; Villata M.; Larionov V.M.; Jorstad S.G.; Marscher A.P.; Weaver Z.R.; Acosta-Pulido J.A.; Agudo I.; Andreeva T.; Arkharov A.; Bachev R.; Benítez E.; Berton M.; Björklund I.; Borman G.A.; Bozhilov V.; Carnerero M.I.; Carosati D.; Casadio C.; Chen W.P.; Damljanovic G.; D'Ammando F.; Escudero J.; Fuentes A.; Giroletti M.; Grishina T.S.; Gupta A.C.; Hagen-Thorn V.A.; Hart M.; Hiriart D.; Hou W.J.; Ivanov D.; Kim J.Y.; Kimeridze G.N.; Konstantopoulou C.; Kopatskaya E.N.; Kurtanidze O.M.; Kurtanidze S.O.; Lähteenmäki A.; Larionova E.G.; Larionova L.V.; Marchili N.; Markovic G.; Minev M.; Morozova D.A.; Myserlis I.; Nakamura M.; Nikiforova A.A.; Nikolashvili M.G.; Otero-Santos J.; Ovcharov E.; Pursimo T.; Rahimov I.; Righini S.; Sakamoto T.; Savchenko S.S.; Semkov E.H.; Shakhovskoy D.; Sigua L.A.; Stojanovic M.; Strigachev A.; Thum C.; Tornikoski M.; Traianou E.; Troitskaya Y.V.; Troitskiy I.S.; Tsai A.; Valcheva A.; Vasilyev A.A.; Vince O.; Zaharieva E. (2021)
    Among active galactic nuclei, blazars show extreme variability properties. We here investigate the case of the BL Lac object S4 0954+65 with data acquired in 2019-2020 by the Transiting Exoplanet Survey Satellite (TESS) ...
  • 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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