Sagittarius A* X-ray Flares Simultaneously Detected by NuSTAR And Chandra
Abstract
Sagittarius A* (Sgr A*) is the supermassive black hole residing at the dynamic center of our Galaxy. Although it remains in a notably underluminous state most of the time, flares were detected in X-ray and infrared bands frequently, increasing up to a few hundred fold in flux for up to a few hours. The flare emission mechanism has been under debate since the discovery, and hard X-ray observation can help to distinguish between different models. From July to October 2012, NuSTAR observed Sgr A* for three times as part of a coordinated observation campaign and detected four flares simultaneously with Chandra, including a bright flare with a flux increase factor of ~50. Here we present the joint analysis results of the four X-ray flares jointly observed and discuss its contribution to the understanding of flare emission mechanism.
- Publication:
-
American Astronomical Society Meeting Abstracts #223
- Pub Date:
- January 2014
- Bibcode:
- 2014AAS...22343802Z