Astron. Astrophys. 319, 515-524 (1997)

Acknowledgements

It is a pleasure to thank John Deeter, Pranab Ghosh, Jean Swank for stimulating discussions, Mark Finger and CALTECH team, particularly Brian Vaughan, Deepto Chakrabarty, Thomas Prince for supplying the pulse frequency and X ray flux records during the work. I thank the Compton Gamma Ray Observatory team at HEASARC for the archival data and refree Martijn de Kool for helpful comments. I acknowledge the National Research Council for their support.

© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998
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