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A. Witzel

Identifiers

  • name variant A. Witzel 0.60 · backfill

Papers (50)

  1. A seasonal cycle and an abrupt change in the variability characteristics of the intraday variable source S4 0954+65 astro-ph.HE · 2012 · author #7
  2. On the influence of the Sun on the rapid variability of compact extragalactic sources astro-ph.SR · 2011 · author #6
  3. Multiwavelength VLBI observations of Sagittarius A* astro-ph.GA · 2010 · author #7
  4. Understanding BL Lac objects Structural & kinematic mode changes in the BL Lac object PKS 0735+178 astro-ph.CO · 2010 · author #2
  5. Non-radial motion in the TeV blazar S5 0716+714 The pc-scale kinematics of a BL Lac Object astro-ph.CO · 2010 · author #3
  6. The kinematics in the pc-scale jets of AGN The case of S5 1803+784 astro-ph.CO · 2010 · author #3
  7. Multi-frequency measurements of the NVSS foreground sources in the Cosmic Background Imager fields. I. Data release astro-ph.CO · 2009 · author #7
  8. Towards millimeter VLBI astro-ph · 2008 · author #6
  9. High-frequency VLBI observations of SgrA* during a multi-frequency campaign in May 2007 astro-ph · 2008 · author #7
  10. Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71, III. Rapid and correlated flux density variability from radio to sub-mm bands astro-ph · 2008 · author #3
  11. Observations of IntraDay Variable sources with the Effelsberg and Urumqi Radio Telescopes astro-ph · 2008 · author #8
  12. VSOP Observations of the Blazar S5 2007+77 astro-ph · 2008 · author #4
  13. Effects of the turbulent ISM on radio observations of quasars astro-ph · 2006 · author #7
  14. Rapid and correlated variability of blazar S5 0716+71 from radio- to sub-mm bands astro-ph · 2006 · author #3
  15. VLBI at the highest frequencies - AGN studied with micro-arcsecond resolution astro-ph · 2006 · author #4
  16. Towards the Event Horizon - High Resolution VLBI Imaging of Nuclei of Active Galaxies astro-ph · 2006 · author #3
  17. Sub-milliarcsecond Imaging of SgrA* and M87 astro-ph · 2006 · author #5
  18. Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. I. Simultaneous broadband observations during November 2003 astro-ph · 2006 · author #7
  19. Present and Future Millimeter VLBI Imaging of Jets in AGN: The Case of NRAO 150 astro-ph · 2005 · author #7
  20. The Innermost AGNs with Future mm-VLBI astro-ph · 2005 · author #7
  21. Dual frequency VSOP imaging of the jet in S5 0836+710 astro-ph · 2005 · author #3
  22. Towards the Event Horizon - The Vicinity of AGN at Micro-Arcsecond Resolution astro-ph · 2004 · author #8
  23. Spectral Properties of the Core and the VLBI-Jets of Cygnus A astro-ph · 2004 · author #6
  24. Motion and Properties of Nuclear Radio Components in Seyfert Galaxies Seen with VLBI astro-ph · 2004 · author #9
  25. Quasi-Periodic Changes in the Parsec-Scale Jet of 3C345 astro-ph · 2003 · author #6
  26. Multi-frequency & Multi-epoch VLBI study of Cygnus A astro-ph · 2003 · author #6
  27. Millimeter VLBI and Variability in AGN Jets astro-ph · 2003 · author #3
  28. Optical and radio behaviour of the BL Lacertae object 0716+714 astro-ph · 2003 · author #16
  29. Compact Intraday Variable Radio Cores: New Observational Approaches astro-ph · 2002 · author #6
  30. Is 0716+714 a superluminal blazar? astro-ph · 2002 · author #4
  31. Proper motion in Cygnus A astro-ph · 2002 · author #4
  32. 2mm Wavelength VLBI of SiO Masers and AGN astro-ph · 2002 · author #14
  33. Understanding Scintillation of Intraday Variables astro-ph · 2002 · author #5
  34. Multi-frequency Study of Intraday Variable Sources astro-ph · 2002 · author #6
  35. VLBI observations at 147 GHz: first detection of transatlantic fringes in bright AGN astro-ph · 2002 · author #6
  36. The Role of Millimeter VLBI Observations in AGN Research astro-ph · 2002 · author #2
  37. The Size of IDV Jet Cores astro-ph · 2001 · author #6
  38. Annual Modulation in the Variability Properties of the IDV-Source 0917+624 ? astro-ph · 2001 · author #6
  39. Intraday Variability in Northern Hemisphere Radio Sources astro-ph · 2001 · author #5
  40. A very rapid Extreme Scattering Event in the IDV source 0954+658 astro-ph · 2001 · author #6
  41. From Centimeter to Millimeter Wavelengths: A High Angular Resolution Study of 3C273 astro-ph · 2001 · author #2
  42. A High-Frequency and Multi-Epoch VLBI Study of 3C 273 astro-ph · 2001 · author #3
  43. Models of Polarized and Variable Radio Emission for IDV Source 0917+624 astro-ph · 2000 · author #4
  44. High Angular Resolution Monitoring of Prominent AGN at 86 GHz astro-ph · 1999 · author #2
  45. SKA in VLBI: Impact on Studies of Small Scale Structures in Active Galactic Nuclei astro-ph · 1999 · author #2
  46. Intraday Radio Variability in Active Galactic Nuclei astro-ph · 1999 · author #2
  47. Unusual radio variability in the BL Lac object 0235+164 astro-ph · 1999 · author #9
  48. VLBI Observations of the Galactic Center Source Sgr A* at 86 GHz and 215 GHz astro-ph · 1998 · author #2
  49. CGRO, Radio and Optical Observations of the Quasar NRAO 140 astro-ph · 1996 · author #4
  50. A Helical Model for the Compact Jet in 3C345 astro-ph · 1995 · author #4

Mentions

  • 0905.2660 #7 · backfill · confidence 0.70 A. Witzel
  • 0812.4211 #6 · backfill · confidence 0.70 A. Witzel
  • 0809.2463 #7 · backfill · confidence 0.70 A. Witzel
  • 0809.2227 #3 · backfill · confidence 0.70 A. Witzel
  • 0804.2787 #8 · backfill · confidence 0.70 A. Witzel
  • 0802.0540 #4 · backfill · confidence 0.70 A. Witzel

Frequent Coauthors