The radio spectra of twenty minor radio sources in the Cygnus X region

The radio spectra of twenty radio sources of the Cygnus X region are established. The sources DR3, DR6, DR7, DR11, DR13 and DR18 show a thermal spectrum whereas DR12 and DR23 show a non-thermal one. Possible thermal sources are also the DR1, DR2, DR9, DR10, DR16, DR17, DR19, DR20, DR22, DR24 and DR26. However, further observations are needed to establish the radio spectra of these last sources beyond any question.