A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Rapid Variability of the Radio Flux Density of the Blazar J0721+7120 (S5 0716+714) in 2010
Tekijät: Gorshkov AG, Ipatov AV, Konnikova VK, Lahteenmaki A, Mardyshkin VV, Mingaliev MG, Nieppola E, Tammi J, Finkel'shtein AM, Kharinov MA
Kustantaja: MAIK NAUKA/INTERPERIODICA/SPRINGER
Julkaisuvuosi: 2011
Lehti: Astronomicheskii Zhurnal / Astronomy Reports
Tietokannassa oleva lehden nimi: ASTRONOMY REPORTS
Lehden akronyymi: ASTRON REP+
Vuosikerta: 55
Numero: 12
Aloitussivu: 1096
Lopetussivu: 1104
Sivujen määrä: 9
ISSN: 1063-7729
DOI: https://doi.org/10.1134/S1063772911120043
Tiivistelmä
Results of a study of the variability of the blazar J0721+7120 carried out on the RATAN-600 based on daily observations from March 5, 2010 to April 30, 2010 at five frequencies from 2.3 to 21.7 GHz are reported. In the same time interval, 13 observing sessions at 37 GHz were carried out on the 14-m radio telescope of the Metsahovi Radio Astronomy Observatory of the Aalto University School of Technology (Finland). From March 19, 2010 to October 20, 2010, 16 daily sessions at 6.2 cm and five sessions at 3.5 cm were conducted on the 32-m radio telescope of the Zelenchukskaya Observatory (Quasar-KVO complex of the Institute of Applied Astronomy, Russian Academy of Sciences). A powerful flare was detected during the observations, with a time scale of approximately 20 days, derived from an analysis of the light curves and the structure and autocorrelation functions. The flare spectrum has been determined. In five sessions on the 32-m Zelenchukskaya telescope at 6.2 cm, intraday variability with time scales 8-16 h was detected; in four sessions, trends with time scales longer than a day were observed. In three sessions at 3.5 cm, intraday variability with a time scale of approximately 5 h was detected.
Results of a study of the variability of the blazar J0721+7120 carried out on the RATAN-600 based on daily observations from March 5, 2010 to April 30, 2010 at five frequencies from 2.3 to 21.7 GHz are reported. In the same time interval, 13 observing sessions at 37 GHz were carried out on the 14-m radio telescope of the Metsahovi Radio Astronomy Observatory of the Aalto University School of Technology (Finland). From March 19, 2010 to October 20, 2010, 16 daily sessions at 6.2 cm and five sessions at 3.5 cm were conducted on the 32-m radio telescope of the Zelenchukskaya Observatory (Quasar-KVO complex of the Institute of Applied Astronomy, Russian Academy of Sciences). A powerful flare was detected during the observations, with a time scale of approximately 20 days, derived from an analysis of the light curves and the structure and autocorrelation functions. The flare spectrum has been determined. In five sessions on the 32-m Zelenchukskaya telescope at 6.2 cm, intraday variability with time scales 8-16 h was detected; in four sessions, trends with time scales longer than a day were observed. In three sessions at 3.5 cm, intraday variability with a time scale of approximately 5 h was detected.
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