Measuring the Mass of the Black Hole in GS2000+25 Using IR Ellipsoidal Variations

Dawn M. Leeber, Thomas E. Harrison, Bernard J. McNamara

Soft X-ray Transients (SXTs) are binary systems that are believed to consist of a black hole and a normal late type dwarf star which fills its Roche Lobe. We have used GRIM II on t…