SgrA* emission at 7mm

Single dish observations were performed with the Itapetinga radio telescope at 7mm, and the contribution of the SgrA Complex that surrounds SgrA* was subtracted and used as instantaneous calibrator. The observations were alternated every 10-min with those of the HII region SrgB2, which was also used as a calibrator.

The reliability of the detections was tested comparing them with simultaneous observations using interferometric techniques. During the observing period we detected a continuous increase in the SgrA* flux density starting in 2008, as well as variability in time-scales of days and strong intraday fluctuations.