AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 84. Studying the Anatomy of the Milky Way
Display, Thursday, June 3, 1999, 9:20am-4:00pm, Southwest Exhibit Hall

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[84.06] RXTE Observations of the Galactic Bulge

C.B Markwardt (NASA/GSFC/NRC), F.E. Marshall, J.H. Swank (NASA/GSFC), J.J.M. in't Zand (SRON)

We present results from RXTE monitoring observations of the galactic center. RXTE has performed a raster scan of a rectangular region approximately 16o X 18o surrounding the galactic center on a twice weekly basis from February to May 1999. In addition to the known X-ray sources, of which we detect about 20, we have found 7 new sources, which range in intensity from 1--60 mCrab. Some of the new sources are highly variable on time scales ranging from minutes to days, with amplitudes as high as 50% RMS. In follow-up observations of one new source, XTE J1710-281 there is evidence for a 400 s eclipse. We present monitoring light curves for a selection of these sources. We have also been able to measure the diffuse X-ray emission from the galactic bulge; it has a scale height of approximately 5o. RXTE monitoring observations of the region are continuing.

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