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Melanie Leong
CSO Technical Brief, 2007
32
CSO SHARC2 Collaborations
Variability of Sgr A*
•Long-term
•Variability
• 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.
~Melanie Leong~