| タイトル | Multiwavelength monitoring of the BL Lacertae object PKS 2155-304. I - The IUE campaign |
| 著者（英） | Pike, G.; Pian, E.; Reichert, G.; Edelson, R.; Treves, A.; Krolik, J.; Koratkar, A.; Madejski, G.; Maraschi, L.; Urry, C. M. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1993-07-10 |
| 言語 | eng |
| 内容記述 | Daily monitoring of PKS 2155-304 with the IUE satellite throughout November 1991 revealed dramatic large-amplitude rapid variations in the UV flux of this BL Lac object. Many smaller, rapid flares are superposed on a general doubling of the intensity. During the five-day period when sampling was roughly continuous, the rapid flaring had an apparent quasi-periodic nature, with peaks repeating every 0.7 day. The short- and long-wavelength UV light curves are well correlated with each other, and with the optical light curve deduced from the Fine Error Sensor on IUE. The formal lag is zero, but the cross-correlation is asymmetric in the sense that the shorter wavelength emission leads the longer. The UV spectral shape varies a small but significant amount. The correlation between spectral shape and intensity is complex. The sign of the correlation is consistent with the nonthermal acceleration processes expected in relativistic plasmas, so that the present results are consistent with relativistic jet models, which can also account for quasi-periodic flaring. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 93A46219 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/316041 |
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