TELAMON: Effelsberg monitoring of AGN jets with very-high-energy astroparticle emission - I. Program description and sample characterization
We introduce the TELAMON program which is using the Effelsberg 100-m telescope to monitor the radio spectra of active galactic nuclei (AGN) under scrutiny in astroparticle physics, specifically TeV blazars and candidate neutrino-associated AGN. Here, we present and characterize our main sample of T...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
April 2024
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| In: |
Astronomy and astrophysics
Year: 2024, Jahrgang: 684, Pages: 1-16 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202348262 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202348262 Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2024/04/aa48262-23/aa48262-23.html 
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| Verfasserangaben: | F. Eppel, M. Kadler, J. Heßdörfer, P. Benke, L. Debbrecht, J. Eich, A. Gokus, S. Hämmerich, D. Kirchner, G.F. Paraschos, F. Rösch, W. Schulga, J. Sinapius, P. Weber, U. Bach, D. Dorner, P.G. Edwards, M. Giroletti, A. Kraus, O. Hervet, S. Koyama, T.P. Krichbaum, K. Mannheim, E. Ros, M. Zacharias, and J.A. Zensus |
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| 245 | 1 | 0 | |a TELAMON |b Effelsberg monitoring of AGN jets with very-high-energy astroparticle emission - I. Program description and sample characterization |c F. Eppel, M. Kadler, J. Heßdörfer, P. Benke, L. Debbrecht, J. Eich, A. Gokus, S. Hämmerich, D. Kirchner, G.F. Paraschos, F. Rösch, W. Schulga, J. Sinapius, P. Weber, U. Bach, D. Dorner, P.G. Edwards, M. Giroletti, A. Kraus, O. Hervet, S. Koyama, T.P. Krichbaum, K. Mannheim, E. Ros, M. Zacharias, and J.A. Zensus |
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| 520 | |a We introduce the TELAMON program which is using the Effelsberg 100-m telescope to monitor the radio spectra of active galactic nuclei (AGN) under scrutiny in astroparticle physics, specifically TeV blazars and candidate neutrino-associated AGN. Here, we present and characterize our main sample of TeV-detected blazars.We analyzed the data sample from the first ∼2.5 yr of observations between August 2020 and February 2023 in the range from 14 GHz to 45 GHz. During this pilot phase, we observed all 59 TeV-detected blazars in the Northern Hemisphere (i.e., Dec > 0°) known at the time of observation. We discuss the basic data reduction and calibration procedures used for all TELAMON data and introduce a sub-band averaging method used to calculate average light curves for the sources in our sample.The TeV-selected sources in our sample exhibit a median flux density of 0.12 Jy at 20 mm, 0.20 Jy at 14 mm, and 0.60 Jy at 7 mm. The spectrum for most of the sources is consistent with a flat radio spectrum and we found a median spectral index (<i>S<i/>(<i>ν<i/>)∝<i>ν<i/><sup><i>α<i/><sup/>) of <i>α<i/> = −0.11. Our results on flux density and spectral index are consistent with previous studies of TeV-selected blazars. Compared to the GeV-selected F-GAMMA sample, TELAMON sources are significantly fainter in the radio band. This is consistent with the double-humped spectrum of blazars being shifted towards higher frequencies for TeV-emitters (in particular for high-synchrotron peaked BL Lac type objects), which results in a lower radio flux density. The spectral index distribution of our TeV-selected blazar sample is not significantly different from the GeV-selected F-GAMMA sample. Moreover, we present a strategy to track the light curve evolution of sources in our sample for future variability and correlation analysis. | ||
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| 700 | 1 | |a Heßdörfer, J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Benke, P. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Debbrecht, L. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Eich, J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Gokus, Andrea Katharina |e VerfasserIn |0 (DE-588)1266021213 |0 (DE-627)1814908250 |4 aut | |
| 700 | 1 | |a Hämmerich, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kirchner, D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Paraschos, G. F. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Rösch, F. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Schulga, W. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Sinapius, J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Weber, P. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bach, U. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Dorner, D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Edwards, P. G. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Giroletti, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kraus, A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hervet, O. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Koyama, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Krichbaum, T. P. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Mannheim, K. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ros, E. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zacharias, Michael |d 1986- |e VerfasserIn |0 (DE-588)143911686 |0 (DE-627)655906940 |0 (DE-576)339653183 |4 aut | |
| 700 | 1 | |a Zensus, J. Anton |d 1958- |e VerfasserIn |0 (DE-588)1224618319 |0 (DE-627)1744166560 |4 aut | |
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