1ES 0229+200

Observation Date (UT)	Observation Lat
	ARGO-YBJ (30.11) ASTRI Mini-Array (28.3) CANGAROO (-31.10 ) CAT (42.50) Crimea (45) CTA pSCT (31.68) CTA South (-24.6272) Durham (-30.48) FACT (28.76) H.E.S.S. (-23.16) HAGAR (30) HAWC (19.0) HEGRA (28.76) LHAASO (29.358) LST-1 (28.76) MAGIC (28.76) Milagro (35.88 ) Potchefstroom (-26.9) TACTIC (24.6) TAIGA (103.07) Telescope Array (39.3) Tibet (30.11) VERITAS (31.68) Whipple (31.68)

Canonical Name:	1ES 0229+200
TeVCat Name:	TeV J0232+202
Other Names:
Source Type:	HBL
R.A.:	02 32 53.2 (hh mm ss)
Dec.:	+20 16 21 (dd mm ss)
Gal Long:	152.97 (deg)
Gal Lat:	-36.61 (deg)
Distance:	z=0.1396
Flux:	0.018 (Crab Units)
Energy Threshold:	580 GeV
Spectral Index:	2.5
Extended:	No
Discovery Date:	2006-12
Discovered By:	H.E.S.S.
TeVCat SubCat:	Default Catalog

Source Notes:

Source position and its uncertainty:
From Aharonian et al. (2007):
- RA (J2000): 02h32m53.2s +/- 3.1s (stat) +/- 1.3s (syst)
- Dec (J2000): +20d16m21s +/- 44" (stat) +/- 20" (syst)

Spectral Properties:
From Aharonian et al. (2007):
- Spectral index: 2.50 +/- 0.19 (stat) +/- 0.10(syst)
From Benbow et al. (2011):
- Spectral index: 2.44 +/- 0.11

Distance:
- the redshift of z = 0.1396 comes from Woo et al. (2005); these redshifts
have measurement errors that are typically less than 0.0001


Seen by: H.E.S.S., VERITAS

• Multi-wavelength study of extreme high-energy peaked BL Lac (EHBL) source 1ES 0229+200 using ultraviolet, X-ray and gamma-ray observations
  Hota, Jyotishree et al., arXiv e-prints parXiv:2409.12827 (2024) [LINK]
  
• TeV and keV-MeV Excesses as Probes for Hadronic Process in BL Lacertaes
  Cheng, Ji-Gui et al., arXiv e-prints parXiv:2201.08148 (2022) [LINK]
  
• Can one-zone hadronuclear model explain the hard-TeV spectrum of BL Lac objects?
  Li, Wei-Jian et al., arXiv e-prints parXiv:2201.12708 (2022) [LINK]
  
• A Two-Zone Model as origin of Hard TeV Spectrum in Extreme BL Lacs
  Aguilar-Ruiz, E. et al., arXiv e-prints parXiv:2203.00880 (2022) [LINK]
  
• X-ray Intraday Variability of HBL Blazars with XMM-Newton
  Devan et al., arXiv e-prints parXiv:2209.05515 (2022) [LINK]
  
• Extreme blazars: the result of unstable recollimated jets?
  Tavecchio, Fabrizio et al., MNRAS 517 pL16-L20 (2022) [LINK]
  
• A lower bound on intergalactic magnetic fields from time variability of 1ES 0229+200 from MAGIC and Fermi/LAT observations
  MAGIC Collaboration et al., arXiv e-prints parXiv:2210.03321 (2022) [LINK]
  
• Extreme TeV BL Lacs: a self-consistent stochastic acceleration model
  Sciaccaluga, Alberto and Tavecchio, Fabrizio, MNRAS 517 p2502-2507 (2022) [LINK]
  
• Two-zone model as origin of hard gamma-rays spectrum in extreme BL Lacs
  Aguilar-Ruiz, E. and Fraija, N., arXiv e-prints parXiv:2108.11906 (2021) [LINK]
  
• Electron-proton co-acceleration on relativistic shocks in extreme-TeV blazars
  Zech, Andreas and Lemoine, Martin, arXiv e-prints parXiv:2108.12271 (2021) [LINK]
  
• Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field
  Dzhatdoev, Timur et al., arXiv e-prints parXiv:2110.13119 (2021) [LINK]
  
• Progress in unveiling extreme particle acceleration in persistent astrophysical jets
  Biteau, Jonathan et al., arXiv e-prints parXiv:2001.09222 (2020) [LINK]
  
• Optical Variability of Three Extreme TeV Blazars
  Pandey, Ashwani et al., arXiv e-prints parXiv:2006.02652 (2020) [LINK]
  
• Constraining X-ray emission in HBL blazars using multiwavelength observations
  Wierzcholska, Alicja and Wagner, Stefan, arXiv e-prints parXiv:2006.00066 (2020) [LINK]
  
• Intrinsic GeV-TeV gamma-ray emission from EHSP blazars
  Singh, K.K. et al., International Cosmic Ray Conference 36 p603 (2019) [LINK]
  
• MAGIC extragalactic highlights from a MeV perspective
  Prandini, Elisa for the MAGIC Collaboration, arXiv e-prints parXiv:1908.02154 (2019) [LINK]
  
• Multi-TeV Flaring from High-energy Blazars: An Evidence of the Photohadronic Process
  Sahu, Sarira et al., ApJ 884 pL17 (2019) [LINK]
  
• New hard-TeV extreme blazars detected with the MAGIC telescopes
  MAGIC Collaboration et al., arXiv e-prints parXiv:1911.06680 (2019) [LINK]
  
• Ultrahigh-energy cosmic ray interactions as the origin of very high energy gamma rays from BL Lacs
  Das, Saikat et al., arXiv e-prints parXiv:1911.06011 (2019) [LINK]
  
• Fundamental physics with blazar spectra: a critical appraisal
  Galanti, Giorgio et al., arXiv e-prints parXiv:1911.09056 (2019) [LINK]
  
• Observable spectral and angular distributions of gamma-rays from extragalactic ultrahigh energy cosmic ray accelerators: the case of extreme TeV blazars
  Khalikov, E.V. and Dzhatdoev, T.A., arXiv e-prints parXiv:1912.10570 (2019) [LINK]
  
• Putting the hadron beam scenario for extreme blazars to the test with the Cherenkov Telescope Array
  Tavecchio, F. et al., ArXiv e-prints p (2018) [LINK]
  
• Photon-ALP oscillations from a blazar to us up to 1000 TeV
  Galanti, G. et al., ArXiv e-prints p (2018) [LINK]
  
• Impact of Plasma Instability on Constraint of the Intergalactic Magnetic Field
  Yan, D. et al., ArXiv e-prints p (2018) [LINK]
  
• Indications for a cascade component in gamma-ray blazar spectra
  Baklagin, S. et al., ArXiv e-prints p (2017) [LINK]
  
• Search for Magnetically Broadened Cascade Emission From Blazars with VERITAS
  VERITAS Collaboration et al., ArXiv e-prints p (2017) [LINK]
  
• The VHE anomaly in blazar spectra and related phenomena
  Dzhatdoev, T. et al., ArXiv e-prints p (2017) [LINK]
  
• Effects of Spatial Fluctuations in the Extra Galactic Background Light on Hard Gamma Ray Spectra
  Kudoda, A.M. and Faltenbacher, A., ArXiv e-prints p (2017) [LINK]
  
• X-ray Intraday Variability of Five TeV Blazars with NuSTAR
  Pandey, A. et al., ArXiv e-prints p (2017) [LINK]
  
• The NuSTAR view on Hard-TeV BL Lacs
  Costamante, L. et al., ArXiv e-prints p (2017) [LINK]
  
• Hard X-ray properties of NuSTAR blazars
  Bhatta, G. et al., ArXiv e-prints p (2017) [LINK]
  
• Bethe-Heitler cascades as a plausible origin of hard spectra in distant TeV blazars
  Zheng, Y.G. et al., A&A 585 pA8 (2016) [LINK]
  
• Electromagnetic cascade masquerade: a way to mimic gamma-ALP mixing effects in blazar spectra
  Dzhatdoev, T.A. et al., ArXiv e-prints p (2016) [LINK]
  
• An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes?
  Bonnoli, G. et al., ArXiv e-prints p (2015) [LINK]
  
• Highlights from the VERITAS AGN Observation Program
  Benbow, W. and for the VERITAS Collaboration, ArXiv e-prints p (2015) [LINK]
  
• Long term lightcurve of the BL Lac object 1ES 0229+200 at TeV energies
  Cologna, G. et al., ArXiv e-prints p (2015) [LINK]
  
• On the detectability of Lorentz invariance violation through anomalous multi-TeV gamma-ray spectra of blazars
  Tavecchio, F. and Bonnoli, G., ArXiv e-prints p (2015) [LINK]
  
• Constraints on the Intergalactic Magnetic Field with Gamma-Ray Observations of Blazars
  Finke, J.D. et al., ArXiv e-prints p (2015) [LINK]
  
• Extreme BL Lacs: probes for cosmology and UHECR candidates
  Tavecchio, F. and Bonnoli, G., ArXiv e-prints p (2015) [LINK]
  
• A hadronic origin for ultra-high-frequency-peaked BL Lac objects
  Cerruti, M. et al., ArXiv e-prints p (2014) [LINK]
  
• Search for Extended Gamma-ray Emission around AGN with H.E.S.S. and Fermi-LAT
  H.E.S.S. Collaboration et al., ArXiv e-prints p (2014) [LINK]
  
• VERITAS Long-Term Observations of Hard Spectrum Blazars
  Madhavan, A.S. and for the VERITAS Collaboration, ArXiv e-prints p (2013) [LINK]
  
• VERITAS results from a three-year observing campaign on the BL Lac object 1ES 0229+200
  Cerruti, M. and for the VERITAS Collaboration, ArXiv e-prints p (2013) [LINK]
  
• The Role of Plasma Instabilities in the Propagation of Gamma-Rays from Distant Blazars
  Saveliev, A. et al., ArXiv e-prints p (2013) [LINK]
  
• A Three-Year Multi-Wavelength Study of the Very High Energy Gamma-ray Blazar 1ES 0229+200
  Aliu, E. et al., ArXiv e-prints p (2013) [LINK]
  
• Gamma-ray and neutrino backgrounds as probes of the high-energy universe: hints of cascades, general constraints, and implications for TeV searches
  Murase, K. et al., jcap 8 p30 (2012) [LINK]
  
• Gamma-ray halos as a measure of intergalactic magnetic fields: a classical moment problem
  Ahlers, M., ArXiv e-prints p (2011) [LINK]
  
• EGMF Constraints from Simultaneous GeV-TeV Observations of Blazars
  Taylor, A.M. et al., ArXiv e-prints p (2011) [LINK]
  
• 1ES 0229+200: An extreme blazar with a very high minimum Lorentz factor
  Kaufmann, S. et al., ArXiv e-prints p (2011) [LINK]
  
• Highlights of the VERITAS Blazar Observation Program
  Wystan Benbow for the VERITAS Collaboration, ArXiv e-prints p (2011) [LINK]
  
• Fermi/LAT observations of 1ES 0229+200: implications for extragalactic magnetic fields and background light
  Vovk, I. et al., ArXiv e-prints p (2011) [LINK]
  
• The intergalactic magnetic field constrained by Fermi/LAT observations of the TeV blazar 1ES 0229+200
  Tavecchio, F. et al., ArXiv e-prints p (2010) [LINK]
  
• Evidence for Strong Extragalactic Magnetic Fields from Fermi Observations of TeV Blazars
  Neronov, A. and Vovk, I., Science 328 p73- (2010) [LINK]
  
• Time Delay of Cascade Radiation for TeV Blazars and the Measurement of the Intergalactic Magnetic Field
  Dermer, C.D. et al., ArXiv e-prints p (2010) [LINK]
  
• Constraints to Energy Spectra of Blazars based on Recent EBL Limits from Galaxy Counts
  Krennrich, F. et al., ArXiv e-prints p (2008) [LINK]
  
• New constraints on the mid-IR EBL from the HESS discovery of VHE gamma-rays from 1ES 0229+200
  Aharonian, F. et al., A&A 475 pL9-L13 (2007) [LINK]
  
• The BeppoSAX View of Extreme BL Lacs
  Costamante, L. et al., p21 (2002) [LINK]
  

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