2012A&A...543A..78L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST14:33:12

2012A&A...543A..78L - Astronomy and Astrophysics, volume 543A, 78-78 (2012/7-1)

Intra-day variability observations of S5 0716+714 over 4.5 years at 4.8 GHz.

LIU X., SONG H.-G., MARCHILI N., LIU B.-R., LIU J., KRICHBAUM T.P., FUHRMANN L. and ZENSUS J.A.

Abstract (from CDS):

We aim to search for evidence of annual modulation in the time scales of the BL Lac object S5 0716+714. The intra-day variability (IDV) observations were carried out monthly from 2005 to 2009, with the Urumqi 25m radio telescope at 4.8GHz. The source has shown prominent IDV as well as long-term flux variations. The IDV time scale does show evidence in favor of an annual modulation, suggesting that the IDV of 0716+714 is dominated by interstellar scintillation. The source underwent a strong outburst phase between mid-2008 and mid-2009; a second intense flare was observed in late 2009, but no correlation between the total flux density and the IDV time scale is found, implying that the flaring state of the source does not have serious implications for the general characteristics of its intra-day variability. However, we find that the inner-jet position angle is changing throughout the years, which could result in an annual modulation noise in the anisotropic ISS model fit. There is also an indication that the lowest IDV amplitudes (rms in flux density) correspond to the slowest time scales of IDV, which would be consistent with an ISS origin of the IDV of 0716+714.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: individual: S5 0716+714 - radio continuum: galaxies - scattering

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2429 2
2 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1100 1
3 6C 095456+654857 BLL 09 58 47.2452838930 +65 33 54.821524491     17.0 15.75   ~ 605 1
4 QSO J1128+592 QSO 11 28 +59.2           ~ 7 0
5 [VV98] J130042.4-325312 QSO 13 00 42.4254849462 -32 53 12.118806423     18.70 18   ~ 70 0
6 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3612 1
7 QSO B1519-273 BLL 15 22 37.67598872 -27 30 10.7854174   18.72 18.5 17.42   ~ 252 1
8 QSO B1622-253 QSO 16 25 46.89164010 -25 27 38.3267989   21.3 20.6 19.60   ~ 289 1
9 ICRF J181926.5+384501 SyG 18 19 26.54737811 +38 45 01.7863328           ~ 105 0
10 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2299 1

    Equat.    Gal    SGal    Ecl

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2019.10.14-14:33:12

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