— E. Churazov, R. Krivonos, A. Lutovinov, I. Mereminsky, S. Sazonov, R. Sunyaev (INTEGRAL Picture of the Month)

"Mikhail was one of the leaders of the INTEGRAL scientific community. "

— Angela Bazzano

"We lost a great person. I will never forget the first time I met him in Taormina in 1998. Mike was young and promise scientist and our expectation were right."

— Volker Beckmann

"I have very fond memories of working with Mike at the ISDC in the early days of the INTEGRAL mission and of the many occasions to discuss with him and to enjoy life throughout the years."

— Peter Kretschmar

"These are very sad news indeed and a great loss both personally and professionally for our community."

— Diego Götz

"This is indeed very bad news, a big loss professionally and humanly. "

— Yura Levin

"The world of astronomy has lost one of the foremost explorers of the x-ray sky, and those of us who knew him personally lost a great colleague, and a great friend."

— Didier Barret

"He was young, very bright and will be missed."

— Marco Feroci

"This is indeed a major loss for our scientific community."

— Enrico Bozzo (on behalf of the ISDC team)

"He has been a greatly estimated colleague, and his contribution to science has been enormous."

— Dr. Carlos Hernández-Monteagudo

"He was active, happy, and strong at his work."

— Ed van den Heuvel

"Mike was a wonderful scientist and a great colleague, with which we worked constructively and always in good harmony for many years with INTEGRAL"

— Wim Hermsen

" I am going to miss him as a good friend and excellent scientist. I always enjoyed interacting with him about our science, our political interests and personally."

— J.P. Roques

"This is a great loss indeed for the Astrophysics community. Mike was a great scientist and a very pleasant person."

— Roland Diehl (with his friends in Garching)

"Mike was a wonderfully lively, inspiring, constructive, creative, and friend-like colleague in our INTEGRAL community, we also have fond memories especially from the the time while he had a fellowship at the Garching Universe cluster."

— Pietro Ubertini

"I had the privilege to work with Mike for some time at the beginning of the survey and had a constructive exchange with him at his IUG time. As you all know was a very talented scientist, front line men and great person… he left an abyss for all of us."

— Christoph Winkler

"He was an outstanding, very excellent scientist and a very pleasant colleague. I enjoyed every moment of his company. Truly an unbelievable loss."

— Carlo Ferrigno (ISDC)

"We lost a bright astrophysicist and a very charming person with whom we had the privilege to discuss during several IUG meetings."

— Jose Alberto Rubino-Martin

"I just learnt the very sad news about Mike Revnivtsev, and I am still stunned and deeply saddened. Please convey my sincerest condolences to his family, and extend them to all his friends and colleagues."

— Andrea Merloni

"I have very fond memories of Misha, who was such a brilliant and kind person, and a privilege to work with."

— Jens Chluba

"Mike was really great and will be dearly missed."

— Tansel AK

"We lost a friend and a scientist. His works will be kept in the common memory of the civilisation, and his memories in his friends. "

— David Buckley

"A real tragedy for one so young and talented"

— Bill & Christine, Julia, Daniel, Miranda Forman

"Mike's scientific contributions, his enthusiasm, and irrepressible passion for everything that he undertook will always be remembered. "

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