•CSO participates in simultaneous observing
campaigns with SMA, Keck, Chandra, HST, VLA, VLT, …
•850 mm
•450 mm
July 2005
July 2005
July 2006
July 2007
These are
Long-Term Variability pictures of Sagittarius A.This was done in collaboration with various
observatories, terrestrial and in space.
If you look at
the center of these pictures, you can see a slight dimming of the center
spot.It is a very slight
change, about 30% less intensity, but it definitely occurred and it happened
over a period of 2 years.
The next slide
is a Short-term Variability study of the same region.
These pictures
and the next were provided by C. Darren Dowell.