From this memorial page at the IMSc website for his friends to share their memories:
Rahul Basu, particle physicist; gourmet, cook and blogger; devourer of books, music, film and good wine; traveller, lover of Delhi and bon vivant, but above all a close friend to many from all around the world, passed away on March 5th, 2011. He was 55.
I have never met Rahul. But, thanks to the Web, I have had the good fortune to read, enjoy, and benefit from his blog posts and comments (here and elsewhere) on an amazingly rich variety of topics, ranging from shoddy (China-related) journalism at The Hindu, to the state of science in India, to IPL matches, to Ram Guha's India after Gandhi, to Elections 2009, to movies, to food, and to a movie about food.
These posts represent just a fraction of Rahul's interests. Their clarity, vigour and humour pack quite punch -- Rahul was the kind of person you wanted on your side in public debates!
It's really, really sad that he's no more.
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If you (or, people you know) have memories / tributes to share, IMSc has this memorial page for Rahul Basu.