A. Witzel

4.6k citations

153 papers · 2.2k indexed · h-index 23

Impact in

Nuclear and High Energy Physics top 1%
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
Astronomy and Astrophysics top 1%
- Radio Astronomy Observations and Technology
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Pulsars and Gravitational Waves Research

Papers in ⓘ

Astronomy and Astrophysics 131
- Radio Astronomy Observations and Technology 85
- Gamma-ray bursts and supernovae 38
- Galaxies: Formation, Evolution, Phenomena 17
- Astrophysical Phenomena and Observations 16
- Pulsars and Gravitational Waves Research 12
Nuclear and High Energy Physics 104
- Astrophysics and Cosmic Phenomena 101

Co-authors: S. J. Wagner (3 shared papers)T. P. Krichbaum (82 shared papers)J. A. Zensus (54 shared papers)S. Britzen (44 shared papers)I. I. K. Pauliny‐Toth (32 shared papers)A. Kraus (29 shared papers)C. J. Schalinski (18 shared papers)A. Quirrenbach (21 shared papers)
Journals: Astronomy and Astrophysics (23 papers)The Astrophysical Journal (18 papers)The Astronomical Journal (9 papers)Nature (4 papers)Monthly Notices of the Royal Astronomical Society (4 papers)
Partner nations: Germany United States China

In The Last Decade

A. Witzel

143 papers receiving 2.1k citations

Peers

Countries citing papers authored by A. Witzel

Since Specialization

Citations

This map shows the geographic impact of A. Witzel's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by A. Witzel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. Witzel more than expected).

Fields of papers citing papers by A. Witzel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. Witzel. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by A. Witzel. The network helps show where A. Witzel may publish in the future.

Co-authors

The 25 scholars most cited alongside A. Witzel, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with A. Witzel Line = papers co-authored together A. Witzel links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 153 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Intraday Variability in Quasars and BL LAC Objects Annual Review of Astronomy and Astrophysics ·S. J. Wagner, A. Witzel	1995	404
2	Rapid Variability in S5 0716+714 Across the Electromagnetic Spectrum The Astronomical Journal ·Stefan Wagner, A. Witzel, J. Heidt, T. P. Krichbaum, S. J. Qian, A. Quirrenbach, R. Wegner, H. Aller, M. F. Aller, K. Anton, I. Appenzeller, A. Eckart, A. Kraus, C. E. Naundorf, Reinhold Kneer, W. Steffen, J. A. Zensus	1996	126
3	Rapid variability of extragalactic radio sources The Astronomical Journal ·D. S. Heeschen, T. P. Krichbaum, C. J. Schalinski, A. Witzel	1987	101
4	Correlated radio and optical variability in the BL Lacertae object 0716 + 714 The Astrophysical Journal ·A. Quirrenbach, A. Witzel, S. Wagner, F. Sanchez-Pons, T. P. Krichbaum, R. Wegner, K. Anton, U. Erkens, Martin G. Haehnelt, J. A. Zensus, K. J. Johnston	1991	101
5	OJ287: Deciphering the “Rosetta stone of blazars★” Monthly Notices of the Royal Astronomical Society ·S. Britzen, Christian Fendt, Gunther Witzel, S. J. Qian, I. N. Pashchenko, O. M. Kurtanidze, Michal Zajaček, Gregory D. Martinez, V. Karas, M. F. Aller, H. D. Aller, A. Eckart, K. Nilsson, P. Arévalo, Jorge Cuadra, M. Subroweit, A. Witzel	2018	76
6	Radio sources with superluminal velocities Nature ·M. H. Cohen, K. I. Kellermann, D. B. Shaffer, R. P. Linfield, A. T. Moffet, J. D. Romney, G. A. Seielstad, I. I. K. Pauliny‐Toth, E. Preuß, A. Witzel, R. T. Schilizzi, B. J. Geldzahler	1977	72
7	Motion and properties of nuclear radio components in Seyfert galaxies seen with VLBI Astronomy and Astrophysics ·E. Middelberg, A. L. Roy, Neil M. Nagar, T. P. Krichbaum, R. P. Norris, A. S. Wilson, H. Falcke, E. J. M. Colbert, A. Witzel, K. J. Fricke	2004	66
8	Intraday variability in compact extragalactic radio sources Astronomy and Astrophysics ·A. Kraus, T. P. Krichbaum, R. Wegner, A. Witzel, Giuseppe Cimò, A. Quirrenbach, S. Britzen, L. Fuhrmann, A. P. Lobanov, C. E. Naundorf, K. Otterbein, Bo Peng, M. Risse, E. Ros, J. A. Zensus	2003	54
9	The 5 GHz strong source surveys. IV - Survey of the area between declination 35 and 70 degrees and summary of source counts, spectra and optical identifications The Astronomical Journal ·I. I. K. Pauliny‐Toth, A. Witzel, E. Preuß, H. Kuehr, E. B. Fomalont, M. M. Davis, K. I. Kellermann	1978	48
10	Superluminal non-ballistic jet swing in the quasar NRAO 150 revealed by mm-VLBI Astronomy and Astrophysics ·I. Agudo, U. Bach, T. P. Krichbaum, Alan P. Marscher, I. Gonidakis, P. J. Diamond, M. Perucho, W. Alef, D. A. Graham, A. Witzel, J. A. Zensus, Michael Bremer, J. A. Acosta‐Pulido, R. Barrena	2007	45
11	The 5-GHz strong source surveys. V - Survey of the area between declinations 70 and 90 deg The Astronomical Journal ·H. Kuehr, I. I. K. Pauliny‐Toth, A. Witzel, Johannes Schmidt	1981	41
12	On the origin of compact radio sources Astronomy and Astrophysics ·S. Britzen, J. Roland, J. Laskar, Kostas D. Kokkotas, R. M. Campbell, A. Witzel	2001	38
13	Intraday variability in compact extragalactic radio sources Astronomy and Astrophysics Supplement Series ·A. Quirrenbach, A. Kraus, A. Witzel, J. A. Zensus, Bo Peng, M. Risse, T. P. Krichbaum, R. Wegner, C. E. Naundorf	2000	38
14	Long-term monitoring of selected radio sources Astronomy and Astrophysics Supplement Series ·Bo Peng, A. Kraus, T. P. Krichbaum, A. Witzel	2000	34
15	A catalogue of extragalactic radio sources having flux densities greater than 1 Jy at 5 GHz. Astronomy & Astrophysics Supplement Series ·H. Kuehr, A. Witzel, I. I. K. Pauliny‐Toth, U. Nauber	1981	33
16	Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. I. Simultaneous broadband observations during November 2003 ArXiv.org ·L. Ostorero, S. J. Wagner, José Gracia, E. Ferrero, T. P. Krichbaum, S. Britzen, A. Witzel, K. Nilsson, M. Villata	2006	28
17	A Possible Periodicity in the Radio Light Curves of 3C 454.3 Chinese Journal of Astronomy and Astrophysics ·Shan-Jie Qian, N. A. Kudryavtseva, S. Britzen, T. P. Krichbaum, Long Gao, A. Witzel, J. A. Zensus, M. F. Aller, H. D. Aller, Xi-Zhen Zhang	2007	27
18	Rapid variability of extragalactic radio sources Nature ·A. Quirrenbach, A. Witzel, T. P. Krichbaum, C. A. Hummel, A. Alberdi, C. J. Schalinski	1989	27
19	VLBI Observations of Cygnus X-3 during the 1985 October Radio Outburst The Astrophysical Journal ·C. J. Schalinski, K. J. Johnston, A. Witzel, R. E. Spencer, R. Fiedler, E. B. Waltman, G. G. Pooley, R. M. Hjellming, Lawrence A. Molnar	1995	27
20	6-cm VLBI observations of compact radio sources The Astronomical Journal ·I. I. K. Pauliny‐Toth, E. Preuß, A. Witzel, D. A. Graham, K. I. Kellerman, B. O. Rönnäng	1981	26

About A. Witzel

A. Witzel is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics, Computational Mechanics, Aerospace Engineering and Oceanography, having authored 153 papers that have together received 2.2k indexed citations. Recurring topics across this work include Astrophysics and Cosmic Phenomena (101 papers), Radio Astronomy Observations and Technology (85 papers), Gamma-ray bursts and supernovae (38 papers), Astronomical Observations and Instrumentation (20 papers), Galaxies: Formation, Evolution, Phenomena (17 papers), Astrophysical Phenomena and Observations (16 papers), Geophysics and Gravity Measurements (14 papers) and Pulsars and Gravitational Waves Research (12 papers). The work is most often cited by research in Nuclear and High Energy Physics (1.9k citations), Astronomy and Astrophysics (2.1k citations), Instrumentation (44 citations), Aerospace Engineering (96 citations) and Oceanography (47 citations). A. Witzel has collaborated with scholars based in Germany, United States and China. Frequent co-authors include S. J. Wagner, T. P. Krichbaum, J. A. Zensus, S. Britzen, I. I. K. Pauliny‐Toth, A. Kraus, C. J. Schalinski, A. Quirrenbach, R. Wegner and S. J. Qian. Their work appears in journals such as Astronomy and Astrophysics, The Astrophysical Journal, The Astronomical Journal, Nature and Monthly Notices of the Royal Astronomical Society.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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