AAS 197, January 2001
Session 4. The Milky Way Galaxy
Display, Monday, January 8, 2001, 9:30am-7:00pm, Exhibit Hall

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[4.02] Chandra Imaging of Sgr A* and the Central Parsec of the Galaxy

F.K. Baganoff, M.W. Bautz, W. Cui, J.P. Doty, G.R. Ricker (MIT), W.N. Brandt, E.D. Feigelson, G.P. Garmire, Y. Maeda, L.K. Townsley (PSU), M. Morris (UCLA), S.H. Pravdo (JPL)

We present a detailed analysis of the X-ray emission from a 50-ks Chandra ACIS-I observation of Sgr A* and the central parsec of the Galaxy. We have discovered an X-ray source coincident with the radio position of Sgr A* to within 0.35 arcsec, corresponding to a maximum projected distance of 16 light-days for an assumed distance to the center of our Galaxy of 8 kpc. This source is the third brightest X-ray source in the entire 17 arcmin x 17 arcmin field of view, and the second brightest heavily absorbed source. The brightest absorbed source in the field lies about 0.5 arcmin from Sgr A*. We estimate that the probability of detecting an absorbed source by random chance that is as bright or brighter than the Sgr A* candidate and that lies within 0.35 arcsec of the radio position is about 3.e-4. Implications of the measured flux and spectrum for various emission models are discussed.

This research was supported by NASA grant NAS8-38252.

The author(s) of this abstract have provided an email address for comments about the abstract: fkb@space.mit.edu

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