Research output: Contribution to journal › Article › peer-review
The dual nature of blazar fast variability : Space and ground observations of S5 0716+714. / Raiteri, C. M.; Villata, M.; Carosati, D.; Benítez, E.; Kurtanidze, S. O.; Gupta, A. C.; Mirzaqulov, D. O.; D'Ammando, F.; Larionov, V. M.; Pursimo, T.; Acosta-Pulido, J. A.; Baida, G. V.; Balmaverde, B.; Bonnoli, G.; Borman, G. A.; Carnerero, M. I.; Chen, W. P.; Dhiman, V.; Di Maggio, A.; Ehgamberdiev, S. A.; Hiriart, D.; Kimeridze, G. N.; Kurtanidze, O. M.; Lin, C. S.; Lopez, J. M.; Marchini, A.; Matsumoto, K.; Mujica, R.; Nakamura, M.; Nikiforova, A. A.; Nikolashvili, M. G.; Okhmat, D. N.; Otero-Santos, J.; Rizzi, N.; Sakamoto, T.; Semkov, E.; Sigua, L. A.; Stiaccini, L.; Troitsky, I. S.; Tsai, A. L.; Vasilyev, A. A.; Zhovtan, A. V.
In: Monthly Notices of the Royal Astronomical Society, Vol. 501, No. 1, 01.02.2021, p. 1100-1115.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - The dual nature of blazar fast variability
T2 - Space and ground observations of S5 0716+714
AU - Raiteri, C. M.
AU - Villata, M.
AU - Carosati, D.
AU - Benítez, E.
AU - Kurtanidze, S. O.
AU - Gupta, A. C.
AU - Mirzaqulov, D. O.
AU - D'Ammando, F.
AU - Larionov, V. M.
AU - Pursimo, T.
AU - Acosta-Pulido, J. A.
AU - Baida, G. V.
AU - Balmaverde, B.
AU - Bonnoli, G.
AU - Borman, G. A.
AU - Carnerero, M. I.
AU - Chen, W. P.
AU - Dhiman, V.
AU - Di Maggio, A.
AU - Ehgamberdiev, S. A.
AU - Hiriart, D.
AU - Kimeridze, G. N.
AU - Kurtanidze, O. M.
AU - Lin, C. S.
AU - Lopez, J. M.
AU - Marchini, A.
AU - Matsumoto, K.
AU - Mujica, R.
AU - Nakamura, M.
AU - Nikiforova, A. A.
AU - Nikolashvili, M. G.
AU - Okhmat, D. N.
AU - Otero-Santos, J.
AU - Rizzi, N.
AU - Sakamoto, T.
AU - Semkov, E.
AU - Sigua, L. A.
AU - Stiaccini, L.
AU - Troitsky, I. S.
AU - Tsai, A. L.
AU - Vasilyev, A. A.
AU - Zhovtan, A. V.
N1 - Publisher Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/2/1
Y1 - 2021/2/1
N2 - 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.
AB - 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.
KW - BL Lacertae objects: general
KW - BL Lacertae objects: individual: S5 0716+714
KW - galaxies: active
KW - galaxies: jets
KW - RELATIVISTIC JETS
KW - QUASI-PERIODIC OSCILLATION
KW - OPTICAL LIGHT CURVES
KW - SWIFT
KW - SPECTRAL VARIABILITY
KW - BL
KW - GAMMA-RAY EMISSION
KW - RADIO VARIABILITY
KW - 3C 66A
KW - CAMPAIGN
UR - http://www.scopus.com/inward/record.url?scp=85100328749&partnerID=8YFLogxK
U2 - 10.1093/mnras/staa3561
DO - 10.1093/mnras/staa3561
M3 - Article
AN - SCOPUS:85100328749
VL - 501
SP - 1100
EP - 1115
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -
ID: 74269196