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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The 72-h WEBT microvariability observation of blazar S5 0716 + 714 in 2009
Astronomy and Astrophysics, Volume 558, Article A92, Year 2013
Notification
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Description
Context. The international Whole Earth Blazar Telescope (WEBT) consortium planned and carried out three days of intensive micro-variability observations of S5 0716 + 714 from February 22, 2009 to February 25, 2009. This object was chosen due to its bright apparent magnitude range, its high declination, and its very large duty cycle for micro-variations. Aims. We report here on the long continuous optical micro-variability light curve of 0716+714 obtained during the multi-site observing campaign during which the Blazar showed almost constant variability over a 0.5 mag range. The resulting light curve is presented here for the first time. Observations from participating observatories were corrected for instrumental differences and combined to construct the overall smoothed light curve. Methods. Thirty-six observatories in sixteen countries participated in this continuous monitoring program and twenty of them submitted data for compilation into a continuous light curve. The light curve was analyzed using several techniques including Fourier transform, Wavelet and noise analysis techniques. Those results led us to model the light curve by attributing the variations to a series of synchrotron pulses. Results. We have interpreted the observed microvariations in this extended light curve in terms of a new model consisting of individual stochastic pulses due to cells in a turbulent jet which are energized by a passing shock and cool by means of synchrotron emission. We obtained an excellent fit to the 72-hour light curve with the synchrotron pulse model. © ESO, 2013.
Authors & Co-Authors
Bhatta, Gopal
United States, Miami
Florida International University
Webb, James R.
United States, Miami
Florida International University
Hollingsworth, H.
United States, Miami
Florida International University
Dhalla, S.
United States, Miami
Florida International University
Khanuja, A.
United States, Miami
Florida International University
Bachev, Rumen S.
Bulgaria, Stara Zagora
Institute of Astronomy Bulgarian Academy of Sciences
Blinov, Dmitry A.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Boettcher, M.
United States, Athens
Ohio University
South Africa, Potchefstroom
North-west University
Bravo Calle, O. J.A.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Calcidese, Paolo
Unknown Affiliation
Capezzali, Daniele
Italy
Armenzano Astronomical Observatory
Carosati, Daniele
Italy
Armenzano Astronomical Observatory
Spain, Brena Baja
Fundación Galileo Galilei
Chigladze, Revaz A.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Collins, A.
Unknown Affiliation
Coloma, Josep M.
Italy, Pino Torinese
Osservatorio Astronomico Di Torino
Efimov, Yu S.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Gupta, Alok Chandra
India, Nainital
Aryabhatta Research Institute of Observational Sciences
Hu, Shaoming
China, Weihai
Shandong University, Weihai
Kurtanidze, Omar M.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Russian Federation, Kazan
Kazan Federal University
Germany, Heidelberg
Landessternwarte Heidelberg
Lamerato, A.
United States, Athens
Ohio University
Larionov, Valeri M.
Russian Federation, Saint Petersburg
Saint Petersburg State University
China, Weihai
Shandong University, Weihai
Russian Federation, Saint Petersburg (ex Leningrad)
Isaac Newton Institute of Chile
Lee, Chung-uk
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Lindfors, Elina J.
Finland, Kaarina
Tuorlan Observatorio
Murphy, Brian W.
United States, Indianapolis
Butler University
Nilsson, Kari
Finland, Kaarina
Tuorlan Observatorio
Ohlert, Johannes M.
Unknown Affiliation
Oksanen, Arto
Finland, Hankasalmi
Hankasalmen Observatorion
Pääkkönen, Pertti
Finland, Helsinki
Jakokoski Observatory
Pollock, J. T.
United States
Applachian State University
Rani, Bindu
Germany, Bonn
Max-plank-institut Fur Radioastromomie Auf Dem Huegel 69
Reinthal, Riho
Finland, Kaarina
Tuorlan Observatorio
Rodríguez, Diego P.
Spain, Madrid
Guadarrama Observatory
Ros, J. A.
Spain, Barcelona
Agrupacion Astronomica de Sabadell
Roustazadeh, Parisa
United States, Athens
Ohio University
Sagar, Ram
India, Nainital
Aryabhatta Research Institute of Observational Sciences
Sánchez, Albert
Spain, Barcelona
Mpc-442 Gualba Observatory
Shastri, Prajval
Russian Federation, Saint Petersburg (ex Leningrad)
Isaac Newton Institute of Chile
Sillanp̈äa, Aimo K.
Finland, Kaarina
Tuorlan Observatorio
Strigachev, Anton A.
Bulgaria, Stara Zagora
Institute of Astronomy Bulgarian Academy of Sciences
Takalo, Leo O.
Finland, Kaarina
Tuorlan Observatorio
Vennes, Stéphane
United States, Melbourne
Florida Institute of Technology
Villata, Massimo
Italy, Pino Torinese
Osservatorio Astronomico Di Torino
Villforth, Carolin
Finland, Kaarina
Tuorlan Observatorio
Wu, Jianghua
China, Beijing
Chinese Academy of Sciences
Zhou, X. U.
China, Beijing
Beijing Normal University
Statistics
Citations: 48
Authors: 45
Affiliations: 28
Identifiers
Doi:
10.1051/0004-6361/201220236
ISSN:
00046361
e-ISSN:
14320746
Research Areas
Environmental