D. Kühl
University of Hamburg
7 Papers
11 Citations
D. Kühl is an academic researcher from University of Hamburg. The author has contributed to research in topics: Blazar & BL Lac object. The author has an hindex of 3, co-authored 7 publications.
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Papers
•Journal Article
Recent activity in the optical and radio lightcurves of the blazar 3C 345 : indications for a 'lighthouse effect' due to jet rotation.
K. J. Schramm,U. Borgeest,M. Camenzind,Stefan Wagner,N. Bade,O. Dreissigacker,Jochen Heidt,W. Hoff,Rainer Kayser,D. Kühl,J. V. Linde,M. D. Linnert,Jaan Pelt,T. Schramm,A. Sillanpää,L. O. Takalo,Esko Valtaoja,M. Vigotti +17 more
TL;DR: In this paper, photometric measurements of the blazar 3C 345 (1641 + 399, z = 0.595) in Johnson R, V and B covering the time since Sep. 1988 were presented.
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•Posted Content
The Hamburg Quasar Monitoring Program (HQM) at Calar Alto. II. Lightcurves of weakly variable objects
TL;DR: In this paper, the authors used a CCD camera equipped to the MPIA 1.2$\,$m telescope to perform photometric reduction relative to stars in the frames.
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•Posted Content
The Hamburg Quasar Monitoring Program (HQM) at Calar Alto III. Lightcurves of optically violent variable sources
TL;DR: In this paper, the authors present lightcurves of 14 known violently variable sources and compare them with literature data for two BL\,Lac objects, 1E\,1229+645 and 4C\,56.27 (1823+568).
2
Multifrequency monitoring of blazars OJ 287 and 3C 66A.
L. O. Takalo,A. Sillanpää,T. Pursimo,Harry J. Lehto,K. Nilsson,Pekka Teerikorpi,Pekka Heinämäki,Mark R. Kidger,J. A. de Diego,J. N. González-Pérez,J. M. Rodríguez-Espinosa,T. Mahoney,P. Boltwood,Deborah Dultzin-Hacyan,Erika Benítez,G. W. Turner,Jeff W. Robertson,R. K. Honeycut,Yu. S. Efimov,N. M. Shakhovskoy,P. A. Charles,K. J. Schramm,U. Borgeest,J. V. Linde,W. Weneit,D. Kühl,T. Schramm,A. C. Sadun,R. Grashuis,Jochen Heidt,S. J. Wagner,H. Bock,M. Kümmel,A. Heines,Massimo Fiorucci,G. Tosti,G. Ghisellini,C. M. Raiteri,M. Villata,G. de Francesco,S. Bosio,G. Latini,M. F. Aller,D. Aller,Philip A. Hughes,E. Valtaoja,H. Teräsranta,Merja Tornikoski,John K. Webb,Elena Pian,Aldo Treves,Chris Shrader,B. McCollum +52 more
- 01 Jan 1996
TL;DR: In this paper, the authors present preliminary results from an intensive multifrequency monitoring of blazars OJ 287 and 3C 66A and observe continuous small amplitude variability in time scales of days.
1
Variability Characteristics of Blazar OJ 287
L. O. Takalo,A. Sillanpää,T. Pursimo,Harry J. Lehto,K. Nilsson,Pekka Teerikorpi,Pekka Heinämäki,Mark R. Kidger,J. A. de Diego,T. Mahoney,J. M. Rodriguez-Espinosa,José Nicolás González-Pérez,P. Boltwood,Deborah Dultzin-Hacyan,Erika Benítez,G. W. Turner,Jeff W. Robertson,R. K. Honeycut,Yu. S. Efimov,N. M. Shakhovskoy,P. A. Charles,D. Kühl,K. J. Schramm,U. Borgeest,J. V. Linde,W. Weneit,T. Schramm,A. C. Sadun,R. Grashuis,Jochen Heidt,H. Bock,Stephan Wagner,M. Kümmel,A. Heines,Massimo Fiorucci,G. Tosti,C. M. Raiteri,M. Villata,G. Latini,S. Bosio,G. Ghisellini,G. de Francesco +41 more
- 01 Jan 1996
TL;DR: In this article, the authors used the OJ-94 project for monitoring OJ 287 during its predicted new outburst in 1994, which was almost at the predicted time, and obtained the best ever obtained light curves for any extragalactic object.