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Multiwavelength intraday variability of the BL Lacertae S5 0716+714
文献类型：期刊论文
| 作者 | Gupta, Alok C.1; Krichbaum, T. P.2; Wiita, P. J.3; Rani, B.1,2; Sokolovsky, K. V.2,4,5; Mohan, P.6; Mangalam, A.6; Marchili, N.2; Fuhrmann, L.2; Agudo, I.7,8 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2012-09-01 |
| 卷号 | 425期号:2页码:1357-1370 |
| 关键词 | galaxies: active BL Lacertae objects: general BL Lacertae objects: individual: S5 0716+714 |
| 英文摘要 | We report results from a one-week multiwavelength campaign to monitor the BL?Lacertae object (BL Lac) S5 0716+714 (on 2009 December 916). Nine ground-based telescopes at widely separated longitudes and one space-based telescope aboard the Swift satellite collected optical data. Radio data were obtained from the Effelsberg and Urumqi observatories and X-ray data from Swift. In the radio bands, the source shows rapid [similar to(0.51.5) d] intraday variability with peak amplitudes of up to similar to 10 per cent. The variability at 2.8?cm leads by about 1?d the variability at 6 and 11?cm. This time lag and more rapid variations suggest an intrinsic contribution to the source's intraday variability at 2.8?cm, while at 6 and 11?cm, interstellar scintillation (ISS) seems to predominate. Large and quasi-sinusoidal variations of similar to 0.8?mag were detected in the V, R and I bands. The X-ray data (0.210?keV) do not reveal significant variability on a 4?d time-scale, favouring reprocessed inverse Compton over synchrotron radiation in this band. The characteristic variability time-scales in radio and optical bands are similar. A quasi-periodic variation of 0.91.1?d in the optical data may be present, but if so it is marginal and limited to 2.2 cycles. Cross-correlations between radio and optical bands are discussed. The lack of a strong radiooptical correlation indicates different physical causes of variability (ISS at long radio wavelengths, source intrinsic origin in the optical) and is consistent with a high jet opacity and a compact synchrotron component peaking at ?100?GHz in an ongoing very prominent flux-density outburst. For the campaign period, we construct a quasi-simultaneous spectral energy distribution, including ?-ray data from the Fermi satellite. We obtain lower limits for the relativistic Doppler boosting of d = 1226, which for a BL?Lac-type object is remarkably high. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | EXTRAGALACTIC RADIO-SOURCES ; ACTIVE GALACTIC NUCLEI ; COMPTON CATASTROPHE SCENARIO ; SWIFT ULTRAVIOLET/OPTICAL TELESCOPE ; MOSCOW COLLECTION PLATES. ; XMM-NEWTON OBSERVATIONS ; ENERGY PEAKED BLAZARS ; GAMMA-RAY OUTBURST ; 3C 454.3 ; OPTICAL VARIABILITY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000307888300043 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/581]  |
| 专题 | 星系宇宙学研究团组 射电天文研究室_利用南山26米射电望远镜观测数据的文章 |
| 作者单位 | 1.Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263129, India 2.Max Planck Inst Radioastron MPIfR, D-53121 Bonn, Germany 3.Coll New Jersey, Dept Phys, Ewing, NJ 08628 USA 4.Lebedev Phys Inst, Ctr Astro Space, Moscow 117997, Russia 5.Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119991, Russia 6.Indian Inst Astrophys, Bangalore 560034, Karnataka, India 7.CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain 8.Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA 9.Bulgarian Acad Sci, Inst Astron, BU-1784 Sofia, Bulgaria 10.Ohio Univ, Astrophys Inst, Dept Phys & Astron, Athens, OH 45701 USA |
| 推荐引用方式 GB/T 7714 | Gupta, Alok C.,Krichbaum, T. P.,Wiita, P. J.,et al. Multiwavelength intraday variability of the BL Lacertae S5 0716+714[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,425(2):1357-1370. |
| APA | Gupta, Alok C..,Krichbaum, T. P..,Wiita, P. J..,Rani, B..,Sokolovsky, K. V..,...&Zensus, J. A..(2012).Multiwavelength intraday variability of the BL Lacertae S5 0716+714.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,425(2),1357-1370. |
| MLA | Gupta, Alok C.,et al."Multiwavelength intraday variability of the BL Lacertae S5 0716+714".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 425.2(2012):1357-1370. |
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