W. Voges, B. Aschenbach, Th. Boller, H. Bräuninger, U. Briel, W. Burkert,
K. Dennerl, J. Englhauser, R. Gruber, F. Haberl, G. Hartner, G. Hasinger,
M. Kürster, E. Pfeffermann, W. Pietsch, P. Predehl, C. Rosso,
J.H.M.M. Schmitt, J. Trümper, and H.-U. Zimmermann
Max-Planck-Institut für extraterrestrische Physik, 85740 Garching, Germany
Astronomy and Astrophysics 349, 389-405 (1999).
The catalogue can be used for scientific purposes as long
as the above publication is referenced.