Статья

The 65 Day Period in 3C 66A during Bright State

M. LainelaDepartment of Physics, University of TurkuL. O. TakaloTuorla Observatory, University of Turku, Väisäläntie 20, FIN-21500 Piikkiö, FinlandA. SillanpääTuorla Observatory, University of Turku, Väisäläntie 20, FIN-21500 Piikkiö, FinlandT. PursimoTuorla Observatory, University of Turku, Väisäläntie 20, FIN-21500 Piikkiö, FinlandK. NilssonTuorla Observatory, University of Turku, Väisäläntie 20, FIN-21500 Piikkiö, FinlandS. KatajainenTuorla Observatory, University of Turku, Väisäläntie 20, FIN-21500 Piikkiö, FinlandG. TostiOsservatorio Astronomico, Universitá di Perugia, Via Pascoli, I-06100 Perugia, ItalyM. FiorucciOsservatorio Astronomico, Universitá di Perugia, Via Pascoli, I-06100 Perugia, ItalyM. LucianiOsservatorio Astronomico, Universitá di Perugia, Via Pascoli, I-06100 Perugia, ItalyM. VillataOsservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, ItalyC. M. RaiteriOsservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, ItalyG. de FrancescoOsservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, ItalyG. SobritoOsservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, ItalyE. BenítezDepartment of Physics, Florida International University, Miami, FL 33199D. Dultzin‐HacyanJ. A. de DiegoG. W. TurnerDepartment of Astronomy, Indiana University, Swain West 319, Bloomington, IN 47405J. W. RobertsonDepartment of Astronomy, Indiana University, Swain West 319, Bloomington, IN 47405R. K. HoneycuttDepartment of Astronomy, Indiana University, Swain West 319, Bloomington, IN 47405

1999en

ABI

Аннотация

Historically, 3C 66A has been considered a relative quiescent blazar. For that reason, 3C 66A was selected as a comparison source for OJ 287 in the OJ-94 project. However, after more detailed observation it turns out that the variability of 3C 66A itself is very interesting. We have analyzed the entire project data set of 3C 66A from fall of 1993 to spring of 1998 by using structure function analysis, Deeming periodograms, Scargle periodograms, and the folded light curves. Here we present the first preliminary evidence for the 65 day period in 3C 66A observed during the bright state. Our analysis indicates that this period is slowly slowing down. We will also discuss the possible physical mechanism producing the observed periodicity.

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Идентификаторы

DOI: 10.1086/307599

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar