This is an announcement for the paper "Frames and operators in Schatten classes" by Hu Bingyang, Le Hai Khoi, and Kehe Zhu. Abstract: Let $T$ be a compact operator on a separable Hilbert space $H$. We show that, for $2\le p<\infty$, $T$ belongs to the Schatten class $S_p$ if and only if $\{\|Tf_n\|\}\in \ell^p$ for \emph{every} frame $\{f_n\}$ in $H$; and for $0<p\le2$, $T$ belongs to $S_p$ if and only if $\{\|Tf_n\|\}\in\ell^p$ for \emph{some} frame $\{f_n\}$ in $H$. Similar conditions are also obtained in terms of the sequence $\{\langle Tf_n,f_n\rangle\}$ and the double-indexed sequence $\{\langle Tf_n,f_m\rangle\}$. Archive classification: math.FA Mathematics Subject Classification: 47B10, 46A35, 46B15 Remarks: 27 pages Submitted from: kzhu@math.albany.edu The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1302.2490 or http://arXiv.org/abs/1302.2490