Optical spectra of four objects identified with variable radio sources

被引：0
|
作者：
V. Chavushyan
R. Mujica
A. G. Gorshkov
V. K. Konnikova
M. G. Mingaliev
机构：
[1] National Institute of Astrophysics,Special Astrophysical Observatory
[2] Optics,undefined
[3] and Electronics,undefined
[4] Sternberg Astronomical Institute,undefined
[5] Russian Academy of Sciences,undefined
来源：
Astronomy Letters | 2000年 / 26卷
关键词：
optical spectra; radio sources;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We obtained optical spectra of four objects identified with variable radio sources. Three objects (0029+0554, 0400+0550, 2245+0500) were found to be quasars with redshifts of 1.314, 0.761, and 1.091. One object (2349+0534) has a continuum spectrum characteristic of BL Lac objects. We analyze spectra of the radio sources in the range 0.97–21.7 GHz for the epoch 1997 and in the range 3.9–11.1 GHz for the epoch 1990, as well as the pattern of variability of their flux densities on time scales of 1.5 and 7 years.
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页码：339 / 343
页数：4
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