The ultraviolet-to-near-infrared spectral flux distribution of four BL Lacertae
The ultraviolet-to-near-infrared spectral flux distribution of four BL Lacertae
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DOI：
10.1086/172154
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发表时间：
1993
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影响因子：
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通讯作者：
R. Falomo;A. Treves;L. Chiappetti;L. Maraschi;E. Pian;E. G. Tanzi
中科院分区：
文献类型：
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作者：
R. Falomo;A. Treves;L. Chiappetti;L. Maraschi;E. Pian;E. G. Tanzi
我们报告同时紫外，光学和近红外观测的四个BL紫胶对象。对PKS 0118-27、PKS 0301-24和PKS 1538+14这三个天体，我们发现从8× 1013到2.5× 1015 Hz的光谱通量分布可以很好地用单次幂律来描述，其光谱指数分别为α ν =1.2、α ν =1.0和α ν =1.3。对于H 0323 +02，在减去宿主星系的贡献后，光谱发射再次符合单一的、更平坦的幂律，α ν =0.78
We report on simultaneous UV, optical, and near-IR observations of four BL Lac objects. For three objects (PKS 0118-27, PKS 0301-24, and PKS 1538+14), we find that the spectral flux distribution from 8×10 13 to 2.5×10 15 Hz is well described by a single power law with spectral index α ν =1.2, α ν =1.0, and α ν =1.3, respectively. For H0323+02, after subtraction of the contribution due to the host galaxy, the spectral emission is again consistent with a single, flatter power law, α ν =0.78