Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-20T03:52:44.715Z Has data issue: false hasContentIssue false

VHE BL Lacs through the MAGIC glasses

Published online by Cambridge University Press:  24 March 2015

Josefa Becerra González
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA Inst. de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain Department of Physics and Department of Astronomy, University of Maryland, College Park, MD 20742, USA email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this contribution an overview of the latest results on the study of BL Lac objects with the MAGIC telescopes at the very high energy (VHE, E>100 GeV) gamma-rays is presented. Three new VHE sources were detected during 2014, two BL Lac objects and the gravitational lensed blazar S3 0218+357. MAGIC detected very fast intra-night variability from IC 310. This detection points to smaller emitting regions than the event horizon, this is hard to be explained in the framework of the current theoretical models. The long term multi wavelength (MWL) study of the BL Lac PKS 1424+240 shows correlation between the radio and optical emission, pointing to a common origin. The MWL SED is not well fitted by a one-zone synchrotron-self Compton (SSC) model, but a two-zone SSC model can explain both, the MWL light curve and the SED. Spectral curvature has been found in the observed VHE spectrum from PG 1553+113. This is the first time that spectral curvature compatible with the EBL absorption is found in an individual object.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2015 

References

Ackermann, M.et al. 2013, ApJS, 209, 34Google Scholar
Aharonian, F.et al., 2007, ApJ, 664, L71Google Scholar
Albert, J.et al., 2007, ApJ 669 862Google Scholar
Aleksic, J.et al. 2010, ApJ 723, L20Google Scholar
Aleksić, J.et al.(MAGIC Collaboration), 2012, APh, 35, 435Google Scholar
Aleksić, J.et al. 2014a, arXiv:1409.5594Google Scholar
Aleksić, J.et al. 2014b, A&A, 563, 91Google Scholar
Aleksić, J.et al. 2014c, Science, 346, 1080Google Scholar
Aleksić, J.et al. 2014d, A&A, 567, 15Google Scholar
Aleksić, J.et al. 2014e, arXiv:1408.1975Google Scholar
Buson, S., Cheung, C. C. & LAT collaboration, 2014, ATel #6316Google Scholar
Cheung, C. C.et al. 2014, ApJ, 782, L14Google Scholar
Danforth, C. W.et al. 2010, ApJ 720 976Google Scholar
Domínguez, A.et al. 2011, MNRAS, 410, 2556Google Scholar
Franceschini, A., Rodighiero, G., & Vaccari, M. 2008, A&A, 487, 837Google Scholar
Furniss, A.et al. 2013, ApJL, 768, L31Google Scholar
Gilmore, R. C.et al. 2009, MNRAS 399 16941708CrossRefGoogle Scholar
Hiroi, K.et al. 2013, ApJS, 207, 36Google Scholar
Kadler, M.et al. 2012, A&A, 538, L1Google Scholar
Kneiske, T. M. & Dole, H., 2010, A&A, 515, A19Google Scholar
Mirzoyan, R.et al. 2014a, ATel #5768Google Scholar
Mirzoyan, R.et al. 2014b, ATel #6062Google Scholar
Mirzoyan, R.et al. 2014c, ATel #6349Google Scholar
Neronov, A.et al. 2010, A&A 519, L6Google Scholar
Nolan, P. L.et al., 2012, ApJS, 199, 31Google Scholar
Ryle, M. & Windram, M. D. 1968, MNRAS 138, 1Google Scholar