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Optical Monitoring of Gamma-Ray Loud Blazars

Published online by Cambridge University Press:  25 May 2016

C.M. Raiteri ,
G. Ghisellini ,
M. Villata ,
G. DE FRANCESCO ,
S. Bosio ,
G. Latini ,
G. Chiumiento ,
L. Lanteri ,
G. Massone  and
F. Racioppi
...Show all authors
C.M. Raiteri
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
G. Ghisellini
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
M. Villata
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
G. DE FRANCESCO
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
S. Bosio
Affiliation:
2 Istituto di Fisica Generale dell'Università Via Pietro Giuria 1, I-10125 Torino, Italy
G. Latini
Affiliation:
2 Istituto di Fisica Generale dell'Università Via Pietro Giuria 1, I-10125 Torino, Italy
G. Chiumiento
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
L. Lanteri
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
G. Massone
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
F. Racioppi
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy
R.L. Smart
Affiliation:
1 Osservatorio Astronomico di Torino Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy

Extract

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The observations by the Compton Gamma Ray Observatory (CGRO) have shown that highly variable and radio-loud quasars emit a significant fraction of their energy in the γ band. According to the Inverse Compton model, the γ-ray emission is due to upscattering of soft (IR-optical-UV) photons by high energy particles. Optical monitoring is thus of great value in providing information on the mechanisms that rule the production of the seed photons for the γ-ray radiation and on the γ-ray emission itself. In particular, detection of variability correlations between optical and γ-ray emissions would be a crucial test for the theoretical predictions.

Type
Relation between Radio and Other Wavelenghts
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 287 - 288
Copyright
Copyright © Kluwer 1996 

References

Bosio, S., De Francesco, G., Ghisellini, G. et al (1995) 4C 38.41, IAU Circ., no. 6183 Google Scholar
Ghisellini, G., Villata, M., Raiteri, C.M. et al. (1995), A&A , (submitted) Google Scholar
Latini, G., Bosio, S., De Francesco, G. et al. (these proceedings) Optical Monitoring of the Gamma-ray Loud BL Lac Object S5 0716+714 Google Scholar
Massaro, E., Nesci, R., Trevese, D. et al. (1995), A&A , (submitted) Google Scholar
Sillanpää, A., Takalo, L.O., Lehto, H.J. et al. (1995) Confirmation of the 12 Year Optical Outburst Cycle in Blazar OJ 287, A&A , (in press) Google Scholar
Takalo, L.O., Sillanpää, A., Pursimo, T. et al. (these proceedings) Variability Characteristics of Blazar OJ 287 Google Scholar
Villata, M., Raiteri, C.M., Ghisellini, G. et al. (1995), A&AS , (submitted) Google Scholar