Blazars are a small fraction of all extragalactic sources but, unlike otherobjects, they are strong emitters across the entire electromagnetic spectrum.In this study we have conducted a detailed investigation of the broad-bandspectral properties of the gamma-ray selected blazars of the Fermi-LAT BrightAGN Sample (LBAS). By combining the accurately estimated Fermi gamma-rayspectra with Swift, radio, NIR-Optical and hard-X/gamma-ray data, collectedwithin three months of the LBAS data taking period, we were able to assemblehigh-quality and quasi-simultaneous Spectral Energy Distributions (SED) for 48LBAS blazars.
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机译：布拉扎斯是所有银河系外源中的一小部分，但与其他物体不同，它们是整个电磁谱中的强辐射源。在这项研究中，我们对费米辐射的伽马射线精选布拉扎斯的宽带光谱特性进行了详细研究。 LAT BrightAGN样本（LBAS）。通过在LBAS数据采集期的三个月内收集的准确估算的费米伽马射线光谱与Swift，无线电，NIR光学和硬X /γ射线数据相结合，我们能够组装高质量和准同时的光谱能48LBAS blazar的分布（SED）。
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