Radio and K-band obs. of Ultra-Steep sources
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A sample of 76 ultra-steep spectrum (USS) radio sources is defined from the 843-MHz Sydney University Molonglo Sky Survey (SUMSS) and 1.4-GHz NRAO VLA Sky Survey (NVSS) radio...
本研究从843兆赫兹悉尼大学莫朗格洛天空巡天（Sydney University Molonglo Sky Survey，SUMSS）与1.4吉赫兹美国国家射电天文台甚大阵天空巡天（National Radio Astronomy Observatory Very Large Array Sky Survey，NVSS）中定义了76个超陡谱（ultra-steep spectrum，USS）射电源样本……
