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Institut für Astronomie und Astrophysik

Abteilung Astronomie

Sand 1, D-72076 Tübingen, Germany

Preprint 17a/97

RXTE Observations of Her X-1

B. Stelzer(1), R. Staubert(1), J. Wilms(1), I. Kreykenbohm(1), D. Gruber(2), and R. Rothschild(2)

(1) Institut für Astronomie und Astrophysik, Abt. Astronomie, Waldhäuser Str. 64, D-72076 Tübingen, Germany
(2) Center of Astronomy and Space Science, University of California, La Jolla, CA, USA

Contribution to The Active X-ray Sky: Results from Beppo-SAX and RXTE (L. Scarsi, H. Bradt, P. Giommi, F. Fiore, eds.), Nucl. Phys. B, Proc. Suppl.

Abstract. Results of two observations (1996 July and 1997 September) of the binary pulsar Her X-1 by the Rossi X-Ray Timing Explorer (RXTE) are presented. We discuss the energy spectra at energies 3 - 20 keV as measured by the PCA. The data can be described by the sum of two power laws, one of which is modified by absorption in cold material, plus an Iron emission line. In this poster we discuss spectra and color/color diagrams for a pre-eclipse dip observed in 1996 July and we present preliminary results for the 1997 September observation of the 35 day Turn-On.

Paper (122k gzip'ed Postscript including figures)

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Jürgen Barnstedt (barnstedt AT astro.uni-tuebingen.de)
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