Detection of a 5-Hz QPO from X-ray Nova GRS 1739-278

Abstract

The X-ray nova GRS1739-278 flared up near the Galactic center in the spring of 1996. Here we report on the discovery of a ~5-Hz quasi-periodic oscillations (QPO) in RXTE/PCA observations of GRS1739-278. The QPO were only present when the source was in its very high state, and disappeared later, when it made a transition down into the high state. We present the energy spectra of this black hole candidate measured in both high and very high states, and discuss the similarities between this system and other X-ray transients.

12 pages, 4 figures, accepted for publication in ApJ Letters

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• Radio/X-ray Correlation in the Mini-Outburts of Black Hole X-ray Transient GRS 1739--278
• The outburst of the X-ray nova GRS 1739-278 in September, 2016
• Studying temporal variability of GRS1739-278 during the 2014 outburst
• Investigation of the Outburst Activity of the Black Hole Candidate GRS 1739-278