MAXI/GSC image fitting analysis for X-ray sources in LMC and SMC
Abstract
The Monitor of All-sky X-ray Image (MAXI) is the unprecedentedly sensitive all-sky X-ray monitor. MAXI started on the observation from August 2009. MAXI has two types of X-ray slit cameras: Solid-state Slit Camera (SSC) for 0.5-10 keV and Gas Slit Camera (GSC) for 2-30 keV bands. Both have long narrow fields of view (FoV) and they sweep almost the whole sky once every 90 minutes. We developed the PSF(Point Spread Function)-fitting method for the scanning data of MAXI/GSC to calculate the position and flux of X-ray point sources. This method is useful both to determine the position of a transient source and to calculate the fluxes of sources located in a crowded region. We present the application of this method on two short X-ray transients discovered by MAXI/GSC (ATel 2321 and 2415). We also applied it to make light curves of X-ray point sources located in LMC and SMC, in which LMC X-1, X-2, X-3, X-4 and SMC X-1 are prominently bright sources. MAXI/GSC data show the super-orbital variation of LMC X-4 (30 days) and SMC X-1 ( 55 days). Black hole binary LMC X-3 showed flare. We present the analysis of these phenomena.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.2446M