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Variability characteristics of Blazar 0J 287

Published online by Cambridge University Press:  25 May 2016

L.O. Takalo ,
A. Sillanpää ,
T. Pursimo ,
H.J. Lehto ,
K. Nilsson ,
P. Teerikorpi ,
P. Heinämäki ,
M. Kidger ,
J.A. DE DIEGO  and
T. Mahoney
...Show all authors
L.O. Takalo
Affiliation:
1 Tuorla Observatory, FIN-21500 Piikkiö, Finland
A. Sillanpää
Affiliation:
1 Tuorla Observatory, FIN-21500 Piikkiö, Finland
T. Pursimo
Affiliation:
1 Tuorla Observatory, FIN-21500 Piikkiö, Finland
H.J. Lehto
Affiliation:
1 Tuorla Observatory, FIN-21500 Piikkiö, Finland
K. Nilsson
Affiliation:
1 Tuorla Observatory, FIN-21500 Piikkiö, Finland
P. Teerikorpi
Affiliation:
1 Tuorla Observatory, FIN-21500 Piikkiö, Finland
P. Heinämäki
Affiliation:
1 Tuorla Observatory, FIN-21500 Piikkiö, Finland
M. Kidger
Affiliation:
2 Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
J.A. DE DIEGO
Affiliation:
2 Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
T. Mahoney
Affiliation:
2 Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
J.-M. Rodríguez-Espinosa
Affiliation:
2 Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
J.N. González-Pérez
Affiliation:
2 Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
P. Boltwood
Affiliation:
3 1655 Main St. Stittsville, Ont. K2S 1N6, Canada
D. Dultzin-Hacyan
Affiliation:
4 Instituto de Astronomía-UNAM, Apdo. Postal 70-264, 04510, Mexico, D.F. Mexico
E. Benitez
Affiliation:
4 Instituto de Astronomía-UNAM, Apdo. Postal 70-264, 04510, Mexico, D.F. Mexico
G. Turner
Affiliation:
5 Department of Astronomy, Indiana University, Swain West 319, Bloomington, IN 47405, USA
J. Robertson
Affiliation:
5 Department of Astronomy, Indiana University, Swain West 319, Bloomington, IN 47405, USA
R. Honeycut
Affiliation:
5 Department of Astronomy, Indiana University, Swain West 319, Bloomington, IN 47405, USA
Yu.S. Efimov
Affiliation:
6 Crimean Astrophysical Observatory, P/O Nauchny, 334413 Crimea, Ukraine
N. Shakhovskoy
Affiliation:
6 Crimean Astrophysical Observatory, P/O Nauchny, 334413 Crimea, Ukraine
P. A. Charles
Affiliation:
7 University of Oxford, Dept. of Astrophysics, Keble Road Oxford, 0X1 3RH, England
D. Kühl
Affiliation:
8 Hamburger Sternwarte, Hamburg Universität, Gojensbergweg 112, D-21029 Hamburg 80, Germany
K.J. Schramm
Affiliation:
8 Hamburger Sternwarte, Hamburg Universität, Gojensbergweg 112, D-21029 Hamburg 80, Germany
U. Borgeest
Affiliation:
8 Hamburger Sternwarte, Hamburg Universität, Gojensbergweg 112, D-21029 Hamburg 80, Germany
J.V. Linde
Affiliation:
8 Hamburger Sternwarte, Hamburg Universität, Gojensbergweg 112, D-21029 Hamburg 80, Germany
W. Weneit
Affiliation:
8 Hamburger Sternwarte, Hamburg Universität, Gojensbergweg 112, D-21029 Hamburg 80, Germany
T. Schramm
Affiliation:
8 Hamburger Sternwarte, Hamburg Universität, Gojensbergweg 112, D-21029 Hamburg 80, Germany
A. Sadun
Affiliation:
9 Bradley Observatory, Agness Scott College, Decantur, GA 30030, USA
R. Grashuis
Affiliation:
10 Capilla Peak Observatory, Albuquerque, NM 87131, USA
J. Heidt
Affiliation:
11 Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
H. Bock
Affiliation:
11 Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
S. Wagner
Affiliation:
11 Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
M. Kümmel
Affiliation:
11 Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
A. Heines
Affiliation:
11 Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
M. Fiorucci
Affiliation:
12 Osservatorio Astronomico, Universita di Perugia, I-601123 Perugia, Italy
G. Tosti
Affiliation:
12 Osservatorio Astronomico, Universita di Perugia, I-601123 Perugia, Italy
C. Raiteri
Affiliation:
13 Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025, Pino Torinese, Italy
M. Villata
Affiliation:
13 Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025, Pino Torinese, Italy
G. Latini
Affiliation:
13 Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025, Pino Torinese, Italy
S. Bosio
Affiliation:
13 Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025, Pino Torinese, Italy
G. Ghisellini
Affiliation:
13 Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025, Pino Torinese, Italy
G. De Francesco
Affiliation:
13 Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025, Pino Torinese, Italy

Extract

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Blazar OJ 287 is one of the best observed extragalactic objects. It's historical light curve goes back to 1890′s. Based on the historical behaviour Sillanpää et al. (1988) showed that OJ 287 displays large periodic outbursts, with a period of 11.7 years. We have monitored OJ 287 intensively for two years, during the OJ-94 project. This project was created for monitoring OJ 287 during its predicted new outburst in 1994. In the data archive we have over 7000 observations on OJ 287, in the radio, infrared and optical bands. This data archive contains the best ever obtained light curves for any extragalactic object. The optical light curve shows continuous variability down to time scales of tens of minutes. The variability observed in OJ 287 can be broken down to (at least) four different categories:

Type
Properties of Radio Sources
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 45 - 46
Copyright
Copyright © Kluwer 1996 

References

Sillanpää, A., et al. (1988), ApJ , Vol. 325., pp. 628–634 Google Scholar