Center for Astrophysics;
Guangzhou University;
National Astronomical Observatories;
Chinese Academy of Sciences;
Key Laboratory of FAST;
National Astronomical Observatories;
Chinese Academy of Sciences;
School of Astronomy and Space Science;
University of Chinese Academy of Sciences;
Shanghai Astronomical Observatory;
Chinese Academy of Sciences;
University of Science and Technology of China;
Chinese Academy of Science;
masers; instrumentation:sensitivity; instrumentation:detectability; sky; density; galaxies:interactions;