The dual nature of blazar fast variability: space and ground observations of S5 0716+714
Blazar S5 0716+714 is well-known for its short-term variability, down to intraday time-scales. We here present the 2-min cadence optical light curve obtained by the TESS space telescope in 2019 December-2020 January and analyse the object fast variability with unprecedented sampling. Supporting obse...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2021
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2020, Jahrgang: 501, Heft: 1, Pages: 1100-1115 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/staa3561 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/staa3561
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| Verfasserangaben: | CM Raiteri, M Villata, D Carosati, E Benítez, SO Kurtanidze, AC Gupta, DO Mirzaqulov, F D’Ammando, VM Larionov, T Pursimo, JA Acosta-Pulido, GV Baida, B Balmaverde, G Bonnoli, GA Borman, MI Carnerero, W-P Chen, V Dhiman, A Di Maggio, SA Ehgamberdiev, D Hiriart, GN Kimeridze, OM Kurtanidze, CS Lin, JM Lopez, A Marchini, K Matsumoto, R Mujica, M Nakamura, AA Nikiforova, MG Nikolashvili, DN Okhmat, J Otero-Santos, N Rizzi, T Sakamoto, E Semkov, LA Sigua, L Stiaccini, IS Troitsky, AL Tsai, AA Vasilyev and AV Zhovtan |
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| 245 | 1 | 4 | |a The dual nature of blazar fast variability |b space and ground observations of S5 0716+714 |c CM Raiteri, M Villata, D Carosati, E Benítez, SO Kurtanidze, AC Gupta, DO Mirzaqulov, F D’Ammando, VM Larionov, T Pursimo, JA Acosta-Pulido, GV Baida, B Balmaverde, G Bonnoli, GA Borman, MI Carnerero, W-P Chen, V Dhiman, A Di Maggio, SA Ehgamberdiev, D Hiriart, GN Kimeridze, OM Kurtanidze, CS Lin, JM Lopez, A Marchini, K Matsumoto, R Mujica, M Nakamura, AA Nikiforova, MG Nikolashvili, DN Okhmat, J Otero-Santos, N Rizzi, T Sakamoto, E Semkov, LA Sigua, L Stiaccini, IS Troitsky, AL Tsai, AA Vasilyev and AV Zhovtan |
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| 520 | |a Blazar S5 0716+714 is well-known for its short-term variability, down to intraday time-scales. We here present the 2-min cadence optical light curve obtained by the TESS space telescope in 2019 December-2020 January and analyse the object fast variability with unprecedented sampling. Supporting observations by the Whole Earth Blazar Telescope Collaboration in B, V, R, and I bands allow us to investigate the spectral variability during the TESS pointing. The spectral analysis is further extended in frequency to the UV and X-ray bands with data from the Neil Gehrels Swift Observatory. We develop a new method to unveil the shortest optical variability time-scales. This is based on progressive de-trending of the TESS light curve by means of cubic spline interpolations through the binned fluxes, with decreasing time bins. The de-trended light curves are then analysed with classical tools for time-series analysis (periodogram, autocorrelation, and structure functions). The results show that below 3 d there are significant characteristic variability time-scales of about 1.7, 0.5, and 0.2 d. Variability on time-scales $\lesssim 0.2$ d is strongly chromatic and must be ascribed to intrinsic energetic processes involving emitting regions, likely jet substructures, with dimension less than about 10−3 pc. In contrast, flux changes on time-scales $\gtrsim 0.5$ d are quasi-achromatic and are probably due to Doppler factor changes of geometric origin. | ||
| 534 | |c 2020 | ||
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| 700 | 1 | |a Nikolashvili, Maria G. |e VerfasserIn |0 (DE-588)1220242721 |0 (DE-627)1736572474 |4 aut | |
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