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A strong emission line near 24.8 angstrom in the X-ray binary system MAXI J0556--332: gravitational redshift or unusual donor?
Dipankar Maitra, Jon M. Miller, John C. Raymond +1
We report the discovery of a strong emission line near 24.8 angstrom (0.5 keV) in the newly discovered X-ray binary system MAXI J0556-332 with the reflection grating spectrometer o…
Suzaku Observations of 4U 1957+11: Potentially the Most Rapidly Spinning Black Hole in (the Halo of) the Galaxy
Michael A. Nowak, Joern Wilms, Katja Pottschmidt +3
We present three Suzaku observations of the black hole candidate 4U 1957+11 (V1408 Aql) --- a source that exhibits some of the simplest and cleanest examples of soft, disk-dominate…
A late jet rebrightening revealed from multi-wavelength monitoring of the black hole candidate XTE J1752-223
D. M. Russell, P. A. Curran, T. Muñoz-Darias +15
We present optical monitoring of the black hole candidate XTE J1752-223 during its 2009 - 2010 outburst and decay to quiescence. The optical light curve can be described by an expo…
A tool to separate optical/infrared disc and jet emission in X-ray transient outbursts: the colour-magnitude diagrams of XTE J1550-564
D. M. Russell, D. Maitra, R. J. H. Dunn +1
It is now established that thermal disc emission and non-thermal jet emission can both play a role at optical/infrared (OIR) wavelengths in X-ray transients. The spectra of the jet…
A Jet Model for the Broadband Spectrum of the Seyfert-1 Galaxy NGC 4051
Dipankar Maitra, Jon M. Miller, Sera Markoff +1
Recent radio VLBI observations of the ~parsec-scale nuclear region of the narrow line Seyfert 1 galaxy NGC 4051 hint toward the presence of outflowing plasma. From available litera…
A Fast X-ray Disk Wind in the Transient Pulsar IGR J17480-2446 in Terzan 5
Jon M. Miller, Dipankar Maitra, Edward M. Cackett +2
Accretion disk winds are revealed in Chandra gratings spectra of black holes. The winds are hot and highly ionized (typically composed of He-like and H-like charge states), and sho…