MAXI/GSC image fitting analysis for transient X-ray sources
Abstract
The Monitor of All-sky X-ray Image (MAXI) is the unprecedentedly sensitive all-sky X-ray monitor. Gas Slit Camera (GSC) of MAXI is sensitive for 2-30 keV bands and sweeps almost the whole sky once every 90 minutes with long narrow fields of view (FoV). 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 like GRBs and to calculate the fluxes of sources located in a crowded region. For transients whose duration is shorter than one scan (about 30 sec-4 min), other method is applied to determine the position without assumption of constancy of X-ray flux. The locations of two short X-ray transients discovered by MAXI/GSC (ATel No.2321 and No.2415) were determined by these methods.
- Publication:
-
Deciphering the Ancient Universe with Gamma-ray Bursts
- Pub Date:
- October 2010
- DOI:
- 10.1063/1.3509322
- Bibcode:
- 2010AIPC.1279..391M
- Keywords:
-
- X-ray sources (astronomical);
- astronomical instruments;
- gamma-ray sources (astronomical);
- 98.70.Qy;
- 95.55.-n;
- 98.70.Rz;
- X-ray sources;
- X-ray bursts;
- Astronomical and space-research instrumentation;
- gamma-ray sources;
- gamma-ray bursts