AAS 205th Meeting, 9-13 January 2005
Session 32 The Galactic Center
Oral, Monday, January 10, 2005, 10:00-11:30am, Pacific 2/3

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[32.05] Submillimeter Monitoring of Sgr A* with SHARC II/CSO

C. Darren Dowell (CalTech/JPL), L. Kirby (Univ. of Chicago), G. Novak, F. Yusef-Zadeh (Northwestern Univ.)

We report on 450 and 850 micron monitoring of Sgr A* from the Caltech Submillimeter Observatory with SHARC II. A central point source is clearly visible at these wavelengths at 11" and 21" resolution, respectively; this emission is believed to come from plasma accreting onto, or ejected from, the supermassive black hole. Observations were carried out in March-April and September 2004 in coordination with other observatories. During the March-April run -- an apparently quiescent period -- the submillimeter flux density was on the low side of published values with a spectrum (in Jy) declining with increasing frequency. We describe searches for variability.

Research at the Caltech Submillimeter Observatory is supported by NSF grant AST-0229008.

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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.