Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 476, Issue 3, Pages 4187-4198Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty439
Keywords
radiation mechanisms: non-thermal; galaxies: active; galaxies: individual: PKS 0625-354; galaxies: jets; gamma-rays: galaxies
Categories
Funding
- German Ministry for Education and Research (BMBF)
- Max Planck Society
- German Research Foundation (DFG)
- Alexander von Humboldt Foundation
- Deutsche Forschungsgemeinschaft
- French Ministry for Research
- CNRS-IN2P3
- Astroparticle Interdisciplinary Programme of the CNRS
- U.K. Science and Technology Facilities Council (STFC)
- IPNP of the Charles University
- Czech Science Foundation
- Polish National Science Centre
- South African Department of Science and Technology
- National Research Foundation
- University of Namibia
- National Commission on Research, Science and Technology of Namibia (NCRST)
- Innsbruck University
- Austrian Science Fund (FWF)
- Austrian Federal Ministry for Science, Research and Economy
- University of Adelaide
- Australian Research Council
- Japan Society for the Promotion of Science
- University of Amsterdam
- Foundation for Polish Science (FNP)
- U.S. National Science Foundation [PHY-1307311]
- Observatoire de Paris
- EU [PIEF-GA-2012-332350]
- EGI Federation
Ask authors/readers for more resources
PKS 0625-354 (z = 0.055) was observed with the four High Energy Stereoscopic System (H.E.S.S.) telescopes in 2012 during 5.5 h. The source was detected above an energy threshold of 200 GeV at a significance level of 6.1 sigma. No significant variability is found in these observations. The source is well described with a power-law spectrum with photon index Gamma = 2.84 +/- 0.50(stat) +/- 0.10(syst) and normalization (at E-0 = 1.0 TeV) N-0(E-0)=(0.58 +/- 0.22(stat) +/- 0.12(syst)) x 10(-12) TeV-1 cm(-2) s(-1). Multiwavelength data collected with Fermi-LAT, Swift-XRT, Swift-UVOT, ATOM and WISE are also analysed. Significant variability is observed only in the Fermi-LAT gamma-ray and Swift-XRT X-ray energy bands. Having a good multiwavelength coverage from radio to very high energy, we performed a broad-band modelling from two types of emission scenarios. The results from a one zone lepto-hadronic and a multizone leptonic models are compared and discussed. On the grounds of energetics, our analysis favours a leptonic multizone model. Models associated to the X-ray variability constraint support previous results, suggesting a BL Lac nature of PKS 0625-354 with, however, a large-scale jet structure typical of a radio galaxy.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available