  We report on the results of observations of a type IV burst by URAN-2
(Ukrainian Radio interferometer of Academy Scienses) in the frequency range 22
- 33 MHz, which is associated with the CME (coronal mass ejection) initiated by
a behind-the-limb active region (N05E151). This burst was observed also by the
radio telescope NDA (Nancay Decameter Array) in the frequency band 30 - 60 MHz.
The purpose of the article is the determination of the source of this type IV
burst. After analysis of the observational data obtained with the URAN-2, NDA,
STEREO (Solar-Terrestrial Relations Observatory) A and B spacecraft, and SOHO
(Solar and Heliospheric Observatory)spacecraft we come to the conclusion that
it is a core of a behind-the-limb CME. We conclude that the radio emission can
escape the center of the CME core at a frequency of 60 MHz and originates from
the periphery of the core at frequency 30 MHz due to occultation by the solar
corona at corresponding frequencies. We find plasma densities in these regions
supposing the plasma mechanism of radio emission. We show that the frequency
drift of the start of the type IV burst is governed by an expansion of the CME
core. Type III bursts, which were observed against this type IV burst, are
shown to be generated by fast electrons propagating through the CME core
plasma. A type II burst registered at frequencies 44 - 64 MHz and 3 - 16 MHz
was radiated by a shock with a velocity of about 1000 km s^{-1} and 800 km
s^{-1}, respectively.
