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Multi-frequency study of the TeV blazar markarian 421 with VLBA observations taken during 2011. / Lico, R.; Giroletti, M.; Orienti, M.; Giovannini, G.; Cotton, W.; Edwards, P. G.; Fuhrmann, L.; Kovalev, Y. Y.; Krichbaum, T. P.; Jorstad, S.; Kino, M.; Marscher, A.; Paneque, D.; Perez-Torres, M. A.; Piner, B. G.; Sokolovsky, K. V.

In: Proceedings of Science, Vol. 2012-October, 2012.

Research output: Contribution to journal › Conference article › peer-review

Harvard

Lico, R, Giroletti, M, Orienti, M, Giovannini, G, Cotton, W, Edwards, PG, Fuhrmann, L, Kovalev, YY, Krichbaum, TP, Jorstad, S, Kino, M, Marscher, A, Paneque, D, Perez-Torres, MA, Piner, BG & Sokolovsky, KV 2012, 'Multi-frequency study of the TeV blazar markarian 421 with VLBA observations taken during 2011', Proceedings of Science, vol. 2012-October.

APA

Lico, R., Giroletti, M., Orienti, M., Giovannini, G., Cotton, W., Edwards, P. G., Fuhrmann, L., Kovalev, Y. Y., Krichbaum, T. P., Jorstad, S., Kino, M., Marscher, A., Paneque, D., Perez-Torres, M. A., Piner, B. G., & Sokolovsky, K. V. (2012). Multi-frequency study of the TeV blazar markarian 421 with VLBA observations taken during 2011. Proceedings of Science, 2012-October.

Vancouver

Lico R, Giroletti M, Orienti M, Giovannini G, Cotton W, Edwards PG et al. Multi-frequency study of the TeV blazar markarian 421 with VLBA observations taken during 2011. Proceedings of Science. 2012;2012-October.

Author

Lico, R. ; Giroletti, M. ; Orienti, M. ; Giovannini, G. ; Cotton, W. ; Edwards, P. G. ; Fuhrmann, L. ; Kovalev, Y. Y. ; Krichbaum, T. P. ; Jorstad, S. ; Kino, M. ; Marscher, A. ; Paneque, D. ; Perez-Torres, M. A. ; Piner, B. G. ; Sokolovsky, K. V. / Multi-frequency study of the TeV blazar markarian 421 with VLBA observations taken during 2011. In: Proceedings of Science. 2012 ; Vol. 2012-October.

BibTeX

@article{b537e7131c074f128c4980a950a49ca2,
title = "Multi-frequency study of the TeV blazar markarian 421 with VLBA observations taken during 2011",
abstract = "We present data obtained with the Very Long Baseline Array (VLBA) at twelve epochs (one observation per month from January to December 2011) at 15 and 24 GHz for the nearby TeV blazar Markarian 421 (z=0.031). We investigate the inner jet structure on parsec scales through the study of model-fit components for each epoch. The structure of Mrk 421 is dominated by a compact (FWHM about 0.13 mas) and bright component, with a one sided jet detected out to about 10 mas. We identified 5-6 components in the jet which are consistent with being stationary during the 12-month period studied here. Significant flux density variations have been detected for the core component. From our results, we estimate a viewing angle 2◦ < θ < 5◦ and a different jet velocity for the radio and the high-energy emission regions, such that the respective Doppler factors are δr ∼ 3 and δh.e ∼ 14.",
author = "R. Lico and M. Giroletti and M. Orienti and G. Giovannini and W. Cotton and Edwards, {P. G.} and L. Fuhrmann and Kovalev, {Y. Y.} and Krichbaum, {T. P.} and S. Jorstad and M. Kino and A. Marscher and D. Paneque and Perez-Torres, {M. A.} and Piner, {B. G.} and Sokolovsky, {K. V.}",
note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.; 11th European VLBI Network Symposium and Users Meeting, EVN Symposium 2012 ; Conference date: 09-10-2012 Through 12-10-2012",
year = "2012",
language = "English",
volume = "2012-October",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",

}

RIS

TY - JOUR

T1 - Multi-frequency study of the TeV blazar markarian 421 with VLBA observations taken during 2011

AU - Lico, R.

AU - Giroletti, M.

AU - Orienti, M.

AU - Giovannini, G.

AU - Cotton, W.

AU - Edwards, P. G.

AU - Fuhrmann, L.

AU - Kovalev, Y. Y.

AU - Krichbaum, T. P.

AU - Jorstad, S.

AU - Kino, M.

AU - Marscher, A.

AU - Paneque, D.

AU - Perez-Torres, M. A.

AU - Piner, B. G.

AU - Sokolovsky, K. V.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2012

Y1 - 2012

N2 - We present data obtained with the Very Long Baseline Array (VLBA) at twelve epochs (one observation per month from January to December 2011) at 15 and 24 GHz for the nearby TeV blazar Markarian 421 (z=0.031). We investigate the inner jet structure on parsec scales through the study of model-fit components for each epoch. The structure of Mrk 421 is dominated by a compact (FWHM about 0.13 mas) and bright component, with a one sided jet detected out to about 10 mas. We identified 5-6 components in the jet which are consistent with being stationary during the 12-month period studied here. Significant flux density variations have been detected for the core component. From our results, we estimate a viewing angle 2◦ < θ < 5◦ and a different jet velocity for the radio and the high-energy emission regions, such that the respective Doppler factors are δr ∼ 3 and δh.e ∼ 14.

AB - We present data obtained with the Very Long Baseline Array (VLBA) at twelve epochs (one observation per month from January to December 2011) at 15 and 24 GHz for the nearby TeV blazar Markarian 421 (z=0.031). We investigate the inner jet structure on parsec scales through the study of model-fit components for each epoch. The structure of Mrk 421 is dominated by a compact (FWHM about 0.13 mas) and bright component, with a one sided jet detected out to about 10 mas. We identified 5-6 components in the jet which are consistent with being stationary during the 12-month period studied here. Significant flux density variations have been detected for the core component. From our results, we estimate a viewing angle 2◦ < θ < 5◦ and a different jet velocity for the radio and the high-energy emission regions, such that the respective Doppler factors are δr ∼ 3 and δh.e ∼ 14.

UR - http://www.scopus.com/inward/record.url?scp=85052369047&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85052369047

VL - 2012-October

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

T2 - 11th European VLBI Network Symposium and Users Meeting, EVN Symposium 2012

Y2 - 9 October 2012 through 12 October 2012

ER -

ID: 88383403