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We have performed a joint spectral and timing analysis of the outburst of GRS1739-278 in 2014 based on Swift and INTEGRAL data. We show that during thisoutburst the system exhibited both intermediate states: hard and soft. Peaks ofquasi-periodic oscillations (QPOs) in the frequency range 0.1-5 Hz classifiedas type-C QPOs have been detected from the system. Using Swift/BAT data we showthat after the 2014 outburst the system passed to the regime of mini-outburstactivity: apart from the three mini-outbursts mentioned in the literature, wehave detected four more mini-outbursts with a comparable (~20 mCrab) flux inthe hard energy band (15-50 keV). We have investigated the influence of theaccretion history on the outburst characteristics: the dependence of the peakflux in the hard energy band in the low/hard state on the time interval betweenthe current and previous peaks has been found (for the outbursts during whichthe system passed to the high/soft state).

Investigation of the Outburst Activity of the Black Hole Candidate GRS 1739-278