RXTE Observations of New Black Hole Candidates XTE J1752-223 and MAXI J1659-152

Understand

We report the most recent results of our analysis of X-ray monitoring of new Galactic Black Hole (BH) candidates XTE J1752-225 and MAXI J1659-152 performed by Rossi X-ray Timing Explorer (RXTE).

• We investigate various aspects of the RXTE data including energy and power spectra, variability energy distribution and phase lags between soft and hard energy bands.
• The sources generally exhibit the spectral states and evolution expected from an accreting stellar mass BH.
• The energy distribution of different variability components show that the aperiodic noise has a spectrum consistently softer with respect to the total rms spectrum, while the spectrum of the quasi-periodic (QPO) features is harder.