Looking for X-ray Modulation without relying on X-ray Modulation

Jaesub HongFall, 2010

Survey of Galactic Bulge X-ray sources

as a part of ChaMPlane

Three low extinction windows

Baade’s Window (BW)Stanek’s Window (SW)The Limiting Window

(LW)

An IP in Baade’s Window : CXOPS J180354.3 – 300005 (1028.3 s)

Hong et al, ApJ, 2009

abso

rption

Intrinsically hard

The Limiting Window (Hong et al 2010, in prep)

An IP in LW : CXOPS J175118.7 – 293811 (4731 s)Hong et al, 2010 in prep

Evans & Hellier 2007

Evans & Hellier 2007

Hong et al, 2010 in prep

1576 s 4730 s 9461 s

e.g. DisCan for quantum gravity photon disperson: Scargle, Norris, Bonnel, 2008sharpness : Shannon, Reny, Fisher information,

varianceShannon

Phase Phase

Ob

serv

ab

les

vs.

Pattern matters?