Detection of Soft X-rays and a Sensitive Search for Noble Gases in Comet Hale-Bopp (C/1995 O1) Krasnopolsky, Vladimir A. ; Mumma, Michael J. ; Abbott, Mark ; Flynn, Brian C. ; Meech, Karen J. ; Yeomans, Donald K. ; Feldman, Paul D. ; Cosmovici, Cristiano B. Abstract Publication: Science Pub Date: September 1997 DOI: 10.1126/science.277.5331.1488 Bibcode: 1997Sci...277.1488K