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Littérature scientifique sur le sujet « BL Lacertae objects »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 20 février 2023

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Articles de revues sur le sujet "BL Lacertae objects"

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Britzen, S., A. Witzel, B. P. Gong, J. W. Zhang, G. Krishna, A. Goyal, M. F. Aller, H. D. Aller, and J. A. Zensus. "Understanding BL Lacertae objects." Astronomy and Astrophysics 515 (June 2010): A105. http://dx.doi.org/10.1051/0004-6361/200913685.

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Sandrinelli, A., S. Covino, A. Treves, A. M. Holgado, A. Sesana, E. Lindfors, and V. F. Ramazani. "Quasi-periodicities of BL Lacertae objects." Astronomy & Astrophysics 615 (July 2018): A118. http://dx.doi.org/10.1051/0004-6361/201732550.

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We review the reports of possible year-long quasi-periodicities of BL Lac objects in the γ-ray and optical bands, and present a homogeneous time analysis of the light curves of PKS2155−304, PG1553+113, and BL Lac. Based on results from a survey covering the entire Fermi γ-ray sky we have estimated the fraction of possible quasi-periodic BL Lac objects. We compared the cyclical behaviour in BL Lac objects with that derived from the search of possible optical periodicities in quasars, and find that at z ≲ 1 the cosmic density of quasi-periodic BL Lac objects is larger than that of quasi-periodic
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Stocke, John T. "New Observations of BL Lacertae Objects." Symposium - International Astronomical Union 175 (1996): 385–88. http://dx.doi.org/10.1017/s0074180900081171.

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This contribution is divided into three parts: 1. A summary of mostly published work that describes the new type of BL Lac Objects discovered with X-ray satellites, “X-ray Bright BL Lacs (XBLs)”, and their relationship to the previously known “radio bright BL Lacs (RBLs).” Most (but not all?) of the differences between XBLs and RBLs are explicable using a “viewing angle” model in which the soft X-ray emission emanates into a much wider cone (23-30°) than the radio emission (8-10°). 2. New ROSAT PSPC soft X-ray observations are presented for complete samples of XBLs and RBLs which may explain t
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Paggi, A., A. Cavaliere, V. Vittorini, and M. Tavani. "Power for dry BL Lacertae objects." Astronomy & Astrophysics 508, no. 3 (December 2009): L31—L34. http://dx.doi.org/10.1051/0004-6361/200913566.

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Wolter, Anna, Alessandro Caccianiga, Roberto della Ceca, and Tommaso Maccacaro. "Luminosity functions of BL Lacertae objects." Astrophysical Journal 433 (September 1994): 29. http://dx.doi.org/10.1086/174622.

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Fan, Jun-Hui, Tong-Xu Hua, Yu-Hai Yuan, Yong-Xiang Wang, Yi Liu, Jiang-Bo Su, Yong-Wei Zhang, Jiang-He Yang, and Yong Huang. "Radio Polarization of BL Lacertae Objects." Publications of the Astronomical Society of Japan 58, no. 6 (December 25, 2006): 945–49. http://dx.doi.org/10.1093/pasj/58.6.945.

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Andruchow, I., G. E. Romero, and S. A. Cellone. "Polarization microvariability of BL Lacertae objects." Astronomy & Astrophysics 442, no. 1 (September 30, 2005): 97–107. http://dx.doi.org/10.1051/0004-6361:20053325.

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Sbarufatti, B., R. Falomo, A. Treves, and J. Kotilainen. "Optical spectroscopy of BL Lacertae objects." Astronomy & Astrophysics 457, no. 1 (September 12, 2006): 35–43. http://dx.doi.org/10.1051/0004-6361:20065455.

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Moles, M., J. M. Garcia-Pelayo, J. Masegosa, and A. Aparicio. "UBVRI observations of BL Lacertae objects." Astrophysical Journal Supplement Series 58 (June 1985): 255. http://dx.doi.org/10.1086/191040.

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Sbarufatti, B., A. Treves, and R. Falomo. "Imaging Redshifts of BL Lacertae Objects." Astrophysical Journal 635, no. 1 (December 10, 2005): 173–79. http://dx.doi.org/10.1086/497022.

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Thèses sur le sujet "BL Lacertae objects"

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Abraham, Roberto G. "Imaging of BL Lac objects." Thesis, University of Oxford, 1991. http://ora.ox.ac.uk/objects/uuid:8af2b188-06a4-4412-bd2a-6ee27b0bf781.

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The investigation of the host galaxies of BL Lac objects (BL Lacs) is a promising new field made practical in recent years by advances in detector technology and improved telescope siting. By better understanding the nature of these host galaxies we can test the standard beaming and lensing models for BL Lacs. This thesis describes the techniques that we have developed for studying the host galaxies of BL Lac objects, and presents the results of a survey of BL Lac host galaxies that we have undertaken with the 4.2m William Herschel Telescope. This survey successfully resolved many new host gal
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Jannuzi, Buell Tomasson. "The optical polarization of BL Lacertae objects." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185256.

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We have used the optical polarization properties of BL Lacertae objects to gain insights into the range and physical causes of their extreme and spectacular observed properties. This dissertation consists of three parts. In Part I we provide an introduction to BL Lacs and other active galactic nuclei. In Part II we present the result of an extensive monitoring program of the optical polarization of x-ray selected BL Lacs (XSBLs). In Part III we present the results of the most extensive optical polarization survey so far undertaken. Our study of the optical polarization properties of XSBLs conf
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Londish, Diana. "Properties of BL Lac objects from the 2dF QSO Redshift Survey." University of Sydney. Physics, 2003. http://hdl.handle.net/2123/600.

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This thesis is an analysis of the X-ray, optical, infrared and radio properties of a sample of candidate BL Lac objects, identified from two catalogues of colour-selected point sources, the 2QZ and 6QZ. The importance of the sample lies in the fact that it is the first BL Lac sample in which initial selection has been made from optical spectra, independent of the objects' flux levels at X-ray and radio frequencies. These optically selected candidate BL Lac objects thus provide an unbiased sample (in terms of radio flux density) with which to study the proportion of radio-
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D'Arcangelo, Francesca D. "Correlated multiwavelength polarization in blazars." [S.l. :] Boston University, 2010. https://staff.nrao.edu/library/00000000009785.pdf.

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George, Ian Michael. "X-ray and ultra-violet observations of BL Lacertae type objects." Thesis, University of Leicester, 1988. http://hdl.handle.net/2381/35891.

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We present the results from EXOSAT and IUE observations of five BL Lac type objects, Mrk 421, Mrk 501, 1218+304, Mrk 180 and 0414+009. We find that at least for the relatively well studied sources Mrk 421 and Mrk 501, the behaviour in the X-ray and ultra-violet differs significantly. In the majority of cases, the X-ray spectra are well represented by a simple power-law model over the 1-6 keV band. In the case of the high state observations of Mrk 421, however, a marked downward curvature of the spectrum is required above ~3 keV, which can be modelled as an exponential decrease. Similar convex
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Ma, Feng. "Discovery of hidden blazars inside quasars /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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Londish, Diana. "Properties of BL Lac objects from the 2dF QSO Redshift Survey." Thesis, The University of Sydney, 2003. http://hdl.handle.net/2123/600.

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This thesis is an analysis of the X-ray, optical, infrared and radio properties of a sample of candidate BL Lac objects, identified from two catalogues of colour-selected point sources, the 2QZ and 6QZ. The importance of the sample lies in the fact that it is the first BL Lac sample in which initial selection has been made from optical spectra, independent of the objects' flux levels at X-ray and radio frequencies. These optically selected candidate BL Lac objects thus provide an unbiased sample (in terms of radio flux density) with which to study the proportion of radio-
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Carnerero, M. I., C. M. Raiteri, M. Villata, J. A. Acosta-Pulido, V. M. Larionov, P. S. Smith, F. D'Ammando, et al. "Dissecting the long-term emission behaviour of the BL Lac object Mrk 421." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/626278.

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We report on long-term multiwavelength monitoring of blazar Mrk 421 by the GLAST-AGILE Support Program of the Whole Earth Blazar Telescope (GASP-WEBT) collaboration and Steward Observatory, and by the Swift and Fermi satellites. We study the source behaviour in the period 2007-2015, characterized by several extreme flares. The ratio between the optical, X-ray and gamma-ray fluxes is very variable. The gamma-ray flux variations show a fair correlation with the optical ones starting from 2012. We analyse spectropolarimetric data and find wavelength-dependence of the polarization degree (P), whic
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Carnerero, Maria, Claudia Raiteri, Massimo Villata, Pulido Jose Acosta, Paul Smith, and Valeri Larionov. "Investigating the Puzzling Synchrotron Behaviour of Mrk 421." MDPI AG, 2016. http://hdl.handle.net/10150/622694.

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We investigate the multiwavelength behaviour of the high-energy peaked BL Lac object (HBL) Mrk 421 at redshift z = 0.031 in the period 2007-2015. We use optical photometric, spectroscopic, and polarimetric data and near-infrared data obtained by 35 observatories participating in the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT), as well as by the Steward Observatory Support of the Fermi Mission. We also employ high-energy data from the Swift (UV and X-rays) satellite to study correlations among emission in different bands.
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Wright, Susan Clare. "Blazar host galaxies." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243088.

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Livres sur le sujet "BL Lacertae objects"

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Meeting, OJ-94 Annual. Blazar monitoring: Towards the third millennium : proceedings of the OJ-94 Annual Meeting 1999 : Torino, Italy, May 19-21, 1999. Pino Torinese, Italy: Osservatorio astronomico di Torino, 1999.

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Urry, Claudia Megan. Coordinated observations of X-ray bright BL lacertae objects. Cambridge, MA: Massacusetts Institute of Technology, 1985.

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McEnery, Julie E. TeV gamma-ray variability of the BL lacertae object markarian 421. Dublin: University College Dublin, 1997.

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Heidelberg Workshop on Gamma-ray Emitting AGN (1996 Heidelberg, Germany). Proceedings of the Heidelberg Workshop on Gamma-ray Emitting AGN: Held at the Landessternwarte, Heidelberg-Königstuhl, 16th to 18th October 1996. Edited by Kirk J. G and Max-Planck-Institut für Kernphysik. Heidelberg, Germany: Max-Planck-Institut für Kernphysik, 1996.

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1943-, Miller H. Richard, ed. Blazar Variability Workshop II: Entering the GLAST era : proceedings of a workshop held at Florida International University, Miami, Florida, USA, 10-12 April 2005. San Francisco, Calif: Astronomical Society of the Pacific, 2006.

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Urry, Claudia Megan. Coordinated observations of X-ray bright BL Lacertae objects: Semi-annual status report #2, NASA grant NAG 5-495. [Washington, DC: National Aeronautics and Space Administration, 1986.

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Urry, Claudia Megan. Final status report, testing the pairs-reflection model with X-ray spectral variability and X-ray properties of complete samples of radio-selected BL lacertae objects: NASA grant NAG5-2510 : period covered: February 1994 through May 1997. [Washington, D.C: National Aeronautics and Space Administration, 1997.

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United States. National Aeronautics and Space Administration., ed. Hot absorbers and the X-ray spectra of BL Lac objects: Final report for NASA grant, NAG5-1671. Baltimore, MD: Space Telescope Science Institute, 1994.

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Urry, Claudia Megan. Hot absorbers and the X-ray spectra of BL Lac objects: Final report for NASA grant, NAG5-1671. Baltimore, MD: Space Telescope Science Institute, 1994.

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1891-1971, Väisälä Yrjö, Valtaoja Esko, and Valtonen M. J. 1945-, eds. Variability of blazars: Proceedings of a conference in honour of the 100th anniversary of the birth of Academician Yrjö Väisälä, held at Tuorla Obervatory, University of Turku, Finland, January 6-10, 1991. Cambridge: Cambridge University Press, 1992.

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Chapitres de livres sur le sujet "BL Lacertae objects"

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Stocke, John T. "New Observations of BL Lacertae Objects." In Extragalactic Radio Sources, 385–88. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0295-4_136.

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Nilsson, K., L. Takalo, T. Pursimo, A. Sillanpää, and J. Heidt. "Host Galaxies of RGB BL Lacertae Objects." In QSO Hosts and Their Environments, 51–54. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-0695-9_8.

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Sol, Hélène, and Lourdes Vicente. "A Tentative Sketch for BL Lacertae Objects." In Multi-Wavelength Continuum Emission of AGN, 473. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9537-2_177.

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Lamer, G., H. Brunner, and R. Staubert. "ROSAT Observations of Bright BL Lacertae Objects." In Multi-Wavelength Continuum Emission of AGN, 377. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9537-2_94.

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Cavaliere, A., E. Giallongo, and F. Vagnetti. "BL Lacertae Objects as an Evolutionary Population." In Quasars, 491–92. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4716-0_110.

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Gabuzda, D. C., D. H. Roberts, J. F. C. Wardle, and L. F. Brown. "Milliarcsecond Polarization Properties of Several BL Lacertae Objects." In The Impact of VLBI on Astrophysics and Geophysics, 167–68. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2949-4_64.

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Padovani, Paolo, and Paolo Giommi. "The Rosat X-Ray Spectra of BL Lacertae Objects." In Extragalactic Radio Sources, 267–68. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0295-4_97.

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Gabuzda, D. C. "New Results from VLBI Polarization Observations of BL Lacertae Objects." In Extragalactic Radio Sources, 49–50. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0295-4_19.

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Falomo, R., E. Pian, R. Scarpa, and A. Treves. "The UV-Optical-Near-IR Emission of BL Lacertae Objects." In Multi-Wavelength Continuum Emission of AGN, 17–20. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9537-2_2.

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Giommi, P., S. G. Ansari, and A. Micol. "Radio to X-ray Energy Distribution of BL Lacertae Objects." In Multi-Wavelength Continuum Emission of AGN, 506–7. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9537-2_204.

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Actes de conférences sur le sujet "BL Lacertae objects"

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PURSIMO, T., T. RECTOR, M. TORNIKOSKI, and D. LONDISH. "SEARCH FOR RADIO QUIET BL LACERTAE OBJECTS." In Proceedings of the Guillermo Haro Conference 2003. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702432_0076.

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Kollgaard, R. I., G. A. Moellenbrock, S. A. Laurent-Muehleisen, and E. D. Feigelson. "VLA studies of X-ray selected BL Lacertae objects." In Testing the AGN paradigm diagnostics. AIP, 1992. http://dx.doi.org/10.1063/1.42273.

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Randall, Jill M., Eric S. Perlman, Sebastian Heinz, and Eric Wilcots. "X-ray Emission of Low-Energy-Peaked BL Lacertae Objects." In THE MONSTER’S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS. AIP, 2009. http://dx.doi.org/10.1063/1.3293025.

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Kollgaard, R. I., E. D. Feigelson, D. C. Gabuzda, R. M. Sambruna, and C. M. Urry. "X-rays and relativistic beaming in radio-selected BL Lacertae objects." In The soft x-ray cosmos: ROSAT science symposium and data analysis workshop. AIP, 1994. http://dx.doi.org/10.1063/1.46659.

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Abeysekara, Anushka. "VERITAS Long Term Monitoring of Gamma-Ray Emission from the BL Lacertae Object." In 35th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0610.

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Schultz, C., K. Berger, E. Lindfors, R. Reinthal, A. Stamerra, MAGIC Collaboration, S. Buson, Fermi Collaboration, T. Hovatta, and OVRO Collaboration. "Spectral variability and multiwavelength studies of the high-frequency-peaked BL Lacertae object 1ES 0806+524 with the MAGIC telescopes." In HIGH ENERGY GAMMA-RAY ASTRONOMY: 5th International Meeting on High Energy Gamma-Ray Astronomy. AIP, 2012. http://dx.doi.org/10.1063/1.4772315.

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Rapports d'organisations sur le sujet "BL Lacertae objects"

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Perlman, E. Intrinsic Curvature in the X-Ray Spectra of BL Lacertae Objects. Office of Scientific and Technical Information (OSTI), February 2005. http://dx.doi.org/10.2172/839750.

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