Speaker
Description
Simultaneous multi-band receiving system enables the detection of weak targets with mm-VLBI through the frequency phase transfer (FPT) or source-frequency phase-referencing (SFPR) technique. This provides great advantages both for imaging and astrometry. In this talk, I will report some observations with SFPR on weak targets including supermassive black holes and binaries. We successfully detected the 3mm VLBI cores and performed the core-shift measurement up to 3mm. This technique is also a powerful tool for the sub-mm VLBI observations. Benefiting from this, the compact triple band receiver becomes worldwide in mm-VLBI observations, I will also briefly update the status of the triple band (22/43/86GHz) receiver for Tianma-65m telescope and other two newly constructed stations.
