ON THE NATURE OF THE COMPACT OBJECT IN SS 433: OBSERVATIONAL EVIDENCE OF X-RAY PHOTON INDEX SATURATIONSEIFINA, Elena; TITARCHUK, Lev.The Astrophysical journal. 2010, Vol 722, Num 1, pp 586-604, issn 0004-637X, 19 p., 1Article

Determination of black hole mass in cygnus X-1 by scaling of spectral index-qpo frequency correlationSHAPOSHNIKOV, Nickolai; TITARCHUK, Lev.The Astrophysical journal. 2007, Vol 663, Num 1, pp 445-449, issn 0004-637X, 5 p., 1Article

Effects of downscattering on the continuum and line spectra in a powerful wind environment : Monte carlo simulations, analytical results, and data analysisLAURENT, Philippe; TITARCHUK, Lev.The Astrophysical journal. 2007, Vol 656, Num 2, pp 1056-1074, issn 0004-637X, 19 p., 1Article

Spectral index and quasi-periodic oscillation frequency correlation in black hole sources: Observational evidence of two phases and phase transition in black holesTITARCHUK, Lev; FIORITO, Ralph.The Astrophysical journal. 2004, Vol 612, Num 2, pp 988-999, issn 0004-637X, 12 p., 1Article

Comprehensive analysis of RXTE data from cygnus X-1 : Spectral index-quasi-periodic oscillation frequency-luminosity correlationsSHAPOSHNIKOV, Nickolai; TITARCHUK, Lev.The Astrophysical journal. 2006, Vol 643, Num 2, pp 1098-1113, issn 0004-637X, 16 p., 1Article

The observed galactic annihilation line : Possible signature of accreting small-mass black holes in the galactic centerTITARCHUK, Lev; CHARDONNET, Pascal.The Astrophysical journal. 2006, Vol 641, Num 1, pp 293-301, issn 0004-637X, 9 p., 1Article

How to distinguish neutron star and black hole X-ray binaries? spectral index and quasi-periodic oscillation frequency correlationTITARCHUK, Lev; SHAPOSHNIKOV, Nickolai.The Astrophysical journal. 2005, Vol 626, Num 1, pp 298-306, issn 0004-637X, 9 p., 1Article

GX 3+1: THE STABILITY OF SPECTRAL INDEX AS A FUNCTION OF MASS ACCRETION RATESEIFINA, Elena; TITARCHUK, Lev.The Astrophysical journal. 2012, Vol 747, Num 2, issn 0004-637X, 99.1-99.15, 1Article

ON THE CONSTANCY OF THE PHOTON INDEX OF X-RAY SPECTRA OF 4U 1728-34 THROUGH ALL SPECTRAL STATESSEIFINA, Elena; TITARCHUK, Lev.The Astrophysical journal. 2011, Vol 738, Num 2, issn 0004-637X, 738128.1-738128.20, 1Article

SPECTRAL INDEX AS A FUNCTION OF MASS ACCRETION RATE IN BLACK HOLE SOURCES: MONTE CARLO SIMULATIONS AND AN ANALYTICAL DESCRIPTIONLAURENT, Philippe; TITARCHUK, Lev.The Astrophysical journal. 2011, Vol 727, Num 1, pp 431-438, issn 0004-637X, 8 p., 1Article

ON THE NATURE OF THE VARIABILITY POWER DECAY TOWARD SOFT SPECTRAL STATES IN X-RAY BINARIES : CASE STUDY IN CYGNUS X-1TITARCHUK, Lev; SHAPOSHNIKOV, Nikolai.The Astrophysical journal. 2008, Vol 678, Num 2, pp 1230-1236, issn 0004-637X, 7 p., 1Article

DISCOVERY OF RED-SKEWED Kα IRON LINE IN Cyg X-2 WITH SUZAKUSHAPOSHNIKOV, Nikolai; TITARCHUK, Lev; LAURENT, Philippe et al.The Astrophysical journal. 2009, Vol 699, Num 2, pp 1223-1228, issn 0004-637X, 6 p., 1Article

ON THE NONRELATIVISTIC ORIGIN OF RED-SKEWED IRON LINES IN CATACLYSMIC VARIABLE, NEUTRON STAR, AND BLACK HOLE SOURCESTITARCHUK, Lev; LAURENT, Philippe; SHAPOSHNIKOV, Nikolai et al.The Astrophysical journal. 2009, Vol 700, Num 2, pp 1831-1846, issn 0004-637X, 16 p., 1Article

Correlations between X-ray spectral and timing characteristics in cygnus X-2TITARCHUK, Lev; KUZNETSOV, Sergey; SHAPOSHNIKOV, Nickolai et al.The Astrophysical journal. 2007, Vol 667, Num 1, pp 404-410, issn 0004-637X, 7 p., 1Article

Black hole mass of the ultraluminous X-ray source M82 X-1DEWANGAN, Gulab C; TITARCHUK, Lev; GRIFFITHS, Richard E et al.The Astrophysical journal. 2006, Vol 637, Num 1, issn 0004-637X, L21-L24, 2Article

Correlations between X-ray spectral characteristics and quasi-periodic oscillations in scorpius X-1BRADSHAW, Charles F; TITARCHUK, Lev; KUZNETSOV, Sergey et al.The Astrophysical journal. 2007, Vol 663, Num 2, pp 1225-1231, issn 0004-637X, 7 p., 1Article

Power spectra of black holes and neutron stars as a probe of hydrodynamic structure of the source: Diffusion theory and its application to Cygnus X-1 and Cygnus X-2 X-ray observationsTITARCHUK, Lev; SHAPOSHNKOV, Nikolai; AREFIEV, Vadim et al.The Astrophysical journal. 2007, Vol 660, Num 1, pp 556-579, issn 0004-637X, 24 p., 1Article

The hard X-ray tails in neutron star low-mass X-ray binaries : BeppoSAX observations and possible theoretical explanation of the case of GX 17+2FARINELLI, Ruben; TITARCHUK, Lev; FRONTERA, Filippo et al.The Astrophysical journal. 2007, Vol 662, Num 2, pp 1167-1172, issn 0004-637X, 6 p., 1Article

A CHANDRA VIEW OF NGC 3621: A BULGELESS GALAXY HOSTING AN AGN IN ITS EARLY PHASE?GLIOZZI, Mario; SATYAPAL, Shobita; ERACLEOUS, Michael et al.The Astrophysical journal. 2009, Vol 700, Num 2, pp 1759-1767, issn 0004-637X, 9 p., 1Article

Measuring atmospheric density with X-ray occultation soundingDETERMAN, Jon R; BUDZIEN, Scott A; KOWALSKI, Michael P et al.Journal of geophysical research. 2007, Vol 112, Num A6, issn 0148-0227, A06323.1-A06323.15Article