Fifteen years of XMM--Newton and Chandra monitoring of Sgr A★: evidence for a recent increase in the bright flaring rate
Journal article published in 2015 by
G. Ponti,
B. De Marco,
Mr Morris 
,
A. Merloni,
T. Muñoz-Darias,
M. Clavel,
D. Haggard,
S. Zhang,
K. Nandra,
S. Gillessen
,
A. Merloni,
T. Muñoz-Darias,
M. Clavel,
D. Haggard,
S. Zhang,
K. Nandra,
S. Gillessen
