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astro-ph2001
The Spectrum and Accurate Location of GRS 1758-258
W. A. Heindl, D. M. Smith
We observed the "micro-quasar" GRS 1758-258 four times with Chandra. Two HRC-I observations were made in 2000 September-October spanning an intermediate-to-hard spectral transition…
astro-ph2001
Studies of Hard X-ray Tails in Z sources with RXTE/HEXTE
F. D'Amico, W. A. Heindl, R. E. Rothschild +1
We report RXTE results of spectral analyses of three (Sco X-1, GX 349+2, and Cyg X-2) out of the 6 known Z sources, with emphasis in the hard X-ray emission. No hard X-ray tails we…