| タイトル | Kepler Observations of Rapid Optical Variability in the BL Lac Object W2r192+42 |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140011321 |
| 著者（英） | Malkan, M.; R.Edelson; Scargle, J.; Mushotzky, R.; Gandhi, P.; Baumgartner, W.; Vaughn, S. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 2013-03-20 |
| 言語 | eng |
| 内容記述 | We present the first Kepler monitoring of a strongly variable BL Lac, W2R1926+42. The light curve covers 181 days with approx. 0.2% errors, 30 minute sampling and >90% duty cycle, showing numerous delta-I/I > 25% flares over timescales as short as a day. The flux distribution is highly skewed and non-Gaussian. The variability shows a strong rms-flux correlation with the clearest evidence to date for non-linearity in this relation. We introduce a method to measure periodograms from the discrete autocorrelation function, an approach that may be well-suited to a wide range of Kepler data. The periodogram is not consistent with a simple power-law, but shows a flattening at frequencies below 7x10(exp -5) Hz. Simple models of the power spectrum, such as a broken power law, do not produce acceptable fits, indicating that the Kepler blazar light curve requires more sophisticated mathematical and physical descriptions than currently in use. |
| NASA分類 | Astronomy |
| レポートNO | ARC-E-DAA-TN12372 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/63007 |
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