The blazar-like radio structure of the TeV source IC 310

Kadler, M.; Eisenacher, D.; Ros, E.; Mannheim, K.; Elsässer, Dominik; Bach, U.

doi:10.1051/0004-6361/201118212

Cited by 62 publications

(70 citation statements)

References 23 publications

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“…It is worth mentioning that the four 1FHL sources associated with radio galaxies have also shown characteristics that are typical for blazars, either in radio morphology (prominent flat-spectrum core with one-sided jet), in optical spectrum, or in γ -ray variability (sporadic short-term flux variability with timescales of 1 day). This is the case for PKS 0625−35 (e.g., see Wills et al 2004), M 87 (e.g., see Abramowski et al 2012), NGC 1275 (e.g., see Kataoka et al 2010;Aleksić et al 2012a), and IC 310 (e.g., see Kadler et al 2012;Shaw et al 2013;The MAGIC Collaboration et al 2013). The fifth radio galaxy, Cen A, is exceptional because of its proximity and also a presence of γ -ray emitting giant lobes clearly resolved with the LAT (Abdo et al 2010d).…”

Section: Description Of the 1fhl Catalogmentioning

confidence: 88%

THE FIRST FERMI -LAT CATALOG OF SOURCES ABOVE 10 GeV

Ackermann¹,

Ajello²,

Allafort³

et al. 2013

ApJS

221

180

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We present a catalog of γ -ray sources at energies above 10 GeV based on data from the Large Area Telescope (LAT) accumulated during the first 3 yr of the Fermi Gamma-ray Space Telescope mission. The first Fermi-LAT catalog of >10 GeV sources (1FHL) has 514 sources. For each source we present location, spectrum, a measure of variability, and associations with cataloged sources at other wavelengths. We found that 449 (87%) could be associated with known sources, of which 393 (76% of the 1FHL sources) are active galactic nuclei. Of the 27 sources associated with known pulsars, we find 20 (12) to have significant pulsations in the range >10 GeV (>25 GeV). In this work we also report that, at energies above 10 GeV, unresolved sources account for 27% ± 8% of the isotropic γ -ray background, while the unresolved Galactic population contributes only at the few percent level to the Galactic diffuse background. We also highlight the subset of the 1FHL sources that are best candidates for detection at energies above 50-100 GeV with current and future ground-based γ -ray observatories.

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Section: Description Of the 1fhl Catalogmentioning

confidence: 88%

THE FIRST FERMI -LAT CATALOG OF SOURCES ABOVE 10 GeV

Ackermann¹,

Ajello²,

Allafort³

et al. 2013

ApJS

221

180

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“…One object, namely, IC 310, fullfilled our criteria but it is not included in our sample, since in the literature it is not classified as a blazar, but as a radio-galaxy or a transition object between radio galaxy and BL Lac type source (e.g. Kadler et al 2012;Aleksić et al 2014d). …”

Section: Sample Selection and Data Analysismentioning

confidence: 99%

X-ray spectral studies of TeV γ-ray emitting blazars

Wierzcholska

Wagner

2016

Mon. Not. R. Astron. Soc.

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This work is a summary of the X-ray spectral studies of 29 TeV γ-ray emitting blazars observed with Swift/XRT especially focusing on sources for which X-ray regime allows to study the low and the high energy ends of the particle distributions function. Variability studies require simultaneous coverage, ideally sampling different flux states of each source. This is achieved using X-ray observations by disentangling the high-energy end of the synchrotron emission and the low-energy end of the Compton emission, which are produced by the same electron population. We focused on a sample of 29 TeV γ-ray emitting blazars with the best signal-to-noise X-ray observations collected with Swift/XRT in the energy range of 0.3-10 keV during 10 years of Swift/XRT operations. We investigate the X-ray spectral shapes and the effects of different corrections for neutral hydrogen absorption and decompose the synchrotron and inverse Compton components. In the case of 5 sources (3C 66A, S5 0716+714, W Comae, 4C +21.35 and BL Lacertae) a superposition of both components is observed in the X-ray band, permitting simultaneous, time resolved studies of both ends of the electron distribution. The analysis of multi-epoch observations revealed that the break energy of X-ray spectrum varies only by a small factor with flux changes. Flux variability is more pronounced in the synchrotron domain (high-energy end of the electron distribution) than in the Compton domain (low energy end of the electron distribution). The spectral shape of the Compton domain is stable, while the flux of the synchrotron domain is variable. These changes cannot be described by simple variations of the cut-off energy, suggesting that the high-energy end of the electron distribution is not generally well-described by cooling only.

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“…The blazar-like nature of IC 310 is supported by a weak nonthermal activity that is present in optical data and by the detection in X-ray of an unresolved source at the position of the IC 310 nucleus (Kadler et al 2012, and references therein). The interpretation of IC 310 as a onesided naked-relativistic jet on such a large scale is puzzling: the one-sided radio structure of IC 310 indeed extends up to a projected distance of 400 kpc.…”

Section: Introductionmentioning

confidence: 82%

Narrow head-tail radio galaxies at very high resolution

Gregory

Feretti

Giovannini

et al. 2017

A&A

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Aims. Narrow-angle tailed (NAT) sources in clusters of galaxies can show on the large scale very narrow tails that are unresolved even at arcsecond resolution. These sources could therefore be classified as one-sided jets. The aim of this paper is to gain new insight into the structure of these sources, and establish whether they are genuine one-sided objects, or if they are two-sided sources. Methods. We observed a sample of apparently one-sided NAT sources at subarcsecond resolution to obtain detailed information on their structure in the nuclear regions of radio galaxies. Results. Most radio galaxies are found to show two-sided jets with sharp bends, and therefore the sources are similar to the more classical NATs, which are affected by strong projection effects.

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The blazar-like radio structure of the TeV source IC 310

Cited by 62 publications

References 23 publications

THE FIRST FERMI -LAT CATALOG OF SOURCES ABOVE 10 GeV

THE FIRST FERMI -LAT CATALOG OF SOURCES ABOVE 10 GeV

X-ray spectral studies of TeV γ-ray emitting blazars

Narrow head-tail radio galaxies at very high resolution

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