We present optical spectroscopy and optical and infrared photometry of the neutron star soft X-ray transient Aql X-1 during its X-ray outburst of 1997 August...
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PublicationAn `outside-in' outburst of AQL X-1
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PublicationBalmer lines emission region in NGC 3516: Kinematical and physical properties
We have studied the Balmer line shapes of NGC 3516 in order to find the structure of central Emission Line Region (ELR) and the physical parameters of the...
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PublicationBeppoSAX observations of the nearby low-mass X-ray binary and fast transient SAX J1819.3-2525
SAX J1819.3-2525 is a nearby X-ray transient which exhibited a fast and large X-ray outburst on Sep. 15, 1999 (Smith et al. 1999). The Wide Field Cameras and...
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PublicationBeppoSAX Wide Field Cameras observations of six type I X-ray bursters
We have discovered three certain (SAX J1324.5-6313, 2S 1711-339 and SAX J1828.5-1037) and two likely (SAX J1818.7+1424 and SAX J2224.9+5421) new thermonuclear X...
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PublicationBlack hole mass and spin measurements through the relativistic precession model: XTE J1859+226
The X-ray light curves of accreting black holes and neutron stars in binary systems show various types of quasi-periodic oscillations (QPOs), the origin of...
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PublicationBlack hole masses of tidal disruption event host galaxies II
We present new medium resolution, optical long-slit spectra of a sample of six ultraviolet (UV)/optical and 17 X-ray-selected tidal disruption event candidate...
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PublicationBlack Hole Powered Nebulae and a Case Study of the Ultraluminous X-Ray Source IC 342 X-1
We present new radio, optical, and X-ray observations of three ultraluminous X-ray sources (ULXs) that are associated with large-scale nebulae. We report the...
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PublicationBlack hole transients
Sixteen years of observations of black hole transients with the Rossi X-ray Timing Explorer, complemented by other X-ray observatories and ground-based optical...
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PublicationBow shocks, nova shells, disc winds and tilted discs: the nova-like V341 Ara has it all
V341 Ara was recently recognized as one of the closest (d ≃ 150 pc) and brightest (V ≃ 10) nova-like cataclysmic variables. This unique system is surrounded by...