- The 3 Ms Chandra campaign on Sgr A*: a census of X-ray flaring activity from the Galactic center
- Proceedings of the International Astronomical Union
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
Over the last decade, X-ray observations of Sgr A* have revealed a black hole in a deep sleep, punctuated roughly once per day by brief flares. The extreme X-ray faintness of this supermassive black hole has been a long-standing puzzle in black hole accretion. To study the accretion processes in the Galactic center, Chandra (in concert with numerous ground- and space-based observatories) undertook a 3 Ms campaign on Sgr A* in 2012. With its excellent observing cadence, sensitivity, and spectral resolution, this Chandra X-ray Visionary Project (XVP) provides an unprecedented opportunity to study the behavior of the closest supermassive black hole. We present a progress report from our ongoing study of X-ray flares, including the brightest flare ever seen from Sgr A*. Focusing on the statistics of the flares and the quiescent emission, we discuss the physical implications of X-ray variability in the Galactic center.
- go to publisher's site
- Proceedings title: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus: proceedings of the 303rd Symposium
of the International Astronomical Union, held in Santa Fe, NM, USA, September 30-October 4, 2013
Publisher: Cambridge University Press
Place of publication: Cambridge, UK
Editors: L. Sjouwerman, C.C. Lang, J.A. Ott
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