All-sky Observations with Suzaku Wide-band All-sky Monitor and MAXI
Abstract
All-sky observation in wide energy band is important for many bright gamma-ray sources as well as other transient phenomena such as Gamma-ray Bursts (GRBs). Suzaku Wide-band All-sky Monitor (WAM) achieves such all-sky observations up to soft gamma-ray band thanks to its wide energy coverage from 50 keV to 5000 keV with very large effective area of 400 cm2 even at 1 MeV. During five year operations, any serious detector problems have not come up and the WAM has successfully detected more than 750 GRBs. Simultaneous detection between the WAM and MAXI of GRB 090831A is an example to perform a GRB spectroscopy in quite wide energy range from a few keV to MeV. In addition, the WAM is monitoring many bright gamma-ray sources such as Crab and Cyg X-1 up to 700 keV by utilizing the earth occultation technique. Combination between the WAM, MAXI, and other all-sky instruments enable us to compare the behavior of their light curves in X-ray with soft gamma-ray energy band. In this presentation, we report on current status of the WAM and discuss synergy between the WAM and MAXI of the all-sky observations.
- Publication:
-
The First Year of MAXI: Monitoring Variable X-ray Sources
- Pub Date:
- December 2010
- Bibcode:
- 2010fym..confP..53O