No. 166, No Hard X-rays from Comet Lovejoy, by H. Hudson and P. St.- Hilaire: Amazing and sungrazing, but no strong radiation above the EUV bands.
See http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/No_Hard_X-rays_from_Come...
Older Nuggets are available at http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/RHESSI_Science_Nuggets (the current series, 2008-present), and at http://sprg.ssl.berkeley.edu/~tohban/nuggets/ (the original series, 2005-2008).
We publish these at roughly two-week intervals and welcome contributions, which should be related, at least loosely, to RHESSI science.