X-ray spectral and timing investigations of XTE J1752-223
  We report on X-ray monitoring observations of the transient black hole
candidate (BHC) XTE J1752-223 with the Rossi X-ray Timing Explorer (RXTE). The
source was discovered on 2009 October 23 and during its low/hard state, which
lasted for at least 25 days, all timing and spectral properties were similar to
those of Cyg X-1 during its canonical hard state.
  The combined PCA/HEXTE spectra were well fitted by an absorbed broken
powerlaw with a high energy cutoff. When RXTE observations were resumed, after
an observational gap due to solar constraint, the source was in the hard
intermediate state. The evolution through the hardness intensity diagram and
the timing properties observed in the power density spectrum suggest that the
source crossed all the canonical BHCs states. We discuss the different states
and present the results of our spectral and timing investigations.
