A New Dynamical Model for the Black Hole Binary LMC X-1 (2008)
Orosz, Jerome A., Steeghs, Danny, McClintock, Jeffrey E., Torres, Manuel A. P., Bochkov, Ivan, Gou, Lijun, ...
We present a dynamical model of the high mass X-ray binary LMC X-1 based on high-resolution optical spectroscopy and extensive optical and near-infrared photometry. From our new optical data we find...
Outburst Morphology in the Soft X-ray Transient Aquila X-1 (2008)
Maitra, Dipankar, Bailyn, Charles D.
We present optical and near-IR (OIR) observations of the major outbursts of the neutron star soft X-ray transient binary system Aquila X-1, from summer 1998 -- fall 2007. The major outbursts of the...
THE QUADRUPLE GRAVITATIONAL LENS PG 11151080: TIME DELAYS AND MODELS (2007)
Paul L. Schechter, Charles D. Bailyn, Robert Barr, Richard Barvainis, Christopher M. Becker, Gary M. Bernstein, ...
12 TODD HURT,
Paul L. Schechter, Charles D. Bailyn, Robert Barr, Richard Barvainis, Christopher M, John P. Blakeslee, ...
Robert A. Fesen 9, Phillipe Fischer
A 15.65 solar mass black hole in an eclipsing binary in the nearby spiral galaxy Messier 33 (2007)
Orosz, Jerome A., McClintock, Jeffrey E., Narayan, Ramesh, Bailyn, Charles D., Hartman, Joel D., Mracri, Lucas, ...
Stellar-mass black holes are discovered in X-ray emitting binary systems, where their mass can be determined from the dynamics of their companion stars. Models of stellar evolution have difficulty...
Orosz, Jerome A., McClintock, Jeffrey E., Narayan, Ramesh, Bailyn, Charles D., Hartman, Joel D., Macri, Lucas, ...
This Supplementary Information provides details about the spectral extraction (crowding issues and the removal of nebular lines), a discussion about the distance to M33, a model for the O-star wind...
Connecting GRBs and galaxies: the probability of chance coincidence (2007)
Cobb, Bethany E., Bailyn, Charles D.
Studies of GRB host galaxies are crucial to understanding GRBs. However, since they are identified by the superposition in the plane of the sky of a GRB afterglow and a galaxy there is always a...
Robust Models for Phase Shifts in Accreting Binary Stars (2007)
Cantrell, Andrew G., Bailyn, Charles D.
Radial velocity studies of accreting binary stars commonly use accretion disk emission lines to determine the radial velocity of the primary star and therefore the mass ratio. These emission line...
A 15.65-solar-mass black hole in an eclipsing binary in the nearby spiral galaxy M 33 (2007)
Orosz, Jerome A., McClintock, Jeffrey E., Narayan, Ramesh, Bailyn, Charles D., Hartman, Joel D., Macri, Lucas, ...
Dynamical evidence for a black hole in the eclipsing X-ray binary M33 X-7 (2007)
Orosz, Jerome A., McClintock, Jeffrey E., Bailyn, Charles D., Remillard, Ronald A., Pietsch, Wolfgang, Narayan, Ramesh
IR Monitoring of the Microquasar GRS 1915+105: Detection of Orbital and Superhump Signatures (2006)
Neil, Ethan T., Bailyn, Charles D., Cobb, Bethany E.
We present the results of seven years of K-band monitoring of the low-mass X-ray binary GRS 1915+105. Positive correlations between the infrared flux and the X-ray flux and X-ray hardness are...
Maitra, Dipankar, Bailyn, Charles D.
We present the results of detailed analysis of pointed X-ray observations by RXTE PCA/HEXTE of the black hole X-ray binary (BHXRB) system V4641 Sgr (= SAX J1819.3-2525) during its outburst of August...
Low-Intensity States in the Neutron Star X-ray Binary Aql X-1 (2005)
Maitra, Dipankar, Bailyn, Charles D.
Aql X-1 was observed in a Low Intensity State (LIS), a state that is usually characterized by high optical but low X-ray flux. Our daily monitoring of the source using the 1.3m telescope in Cerro...
Rapid Spectral Variability during the 2003 Outburst of V4641 Sgr (= SAX J1819.3-2525) (2005)
Maitra, Dipankar, Bailyn, Charles D.
The black hole candidate V4641 Sgr (= SAX J1819.3-2525) went through a brief outburst during 2003 Aug 01 to Aug 08. During the outburst, activity was noted in optical, radio as well as X-rays. Here...
Homan, Jeroen, Buxton, Michelle, Markoff, Sera, Bailyn, Charles D., Nespoli, Elisa, Belloni, Tomaso
(Abridged) We report on RXTE and optical/near-infrared (nIR) observations of the black hole transient GX 339-4, made over a time span of 8 months in 2002 and covering the initial rise and transition...
Dynamical Evidence for a Black Hole in the Microquasar XTE J1550-564 (2001)
Orosz, Jerome A., Groot, Paul J., Van Der Klis, Michiel, McClintock, Jeffrey E., Garcia, Michael R., Zhao, Ping, ...
Optical spectroscopic observations of the companion star (type G8IV to K4III) in the microquasar system XTE J1550-564 reveal a radial velocity curve with a best fitting spectroscopic period of P_sp =...
A Black Hole in the Superluminal source SAX J1819.3-2525 (V4641 Sgr) (2001)
Orosz, Jerome A., Kuulkers, Erik, Van Der Klis, Michiel, McClintock, Jeffrey E., Garcia, Michael R., Callanan, Paul J., ...
(shortened) Spectroscopic observations of the fast X-ray transient and superluminal jet source SAX J1819.3-2525 (V4641 Sgr) reveal a best fitting period of P_spect=2.81678 +/- 0.00056 days and a...
Optical and Infrared Photometry of the Micro-Quasar GRO J1655-40 in Quiescence (2001)
Greene, Jenny, Bailyn, Charles D., Orosz, Jerome A.
We present BVIJK photometry of the black-hole candidate GRO J1655-40 in full quiescence. We report a refined orbital period of 2.62191 +/- 0.00020 days. The light curves are dominated by ellipsoidal...
Optical Observations of the Black Hole Candidate XTE J1550-564 During Re-Flare and Quiescence (2000)
Jain, Raj K., Bailyn, Charles D., Orosz, Jerome A., McClintock, Jeffrey E., Sobczak, Gregory J., Remillard, Ronald A.
We report optical monitoring of the soft X-ray transient XTE J1550-564 during the 1999 season (4 January 1999 to 24 August 1999). The first optical observations available in 1999 show that the peak...
Complete RXTE Spectral Observations of the Black Hole X-ray Nova XTE J1550-564 (2000)
Sobczak, Gregory J., McClintock, Jeffrey E., Remillard, Ronald A., Cui, Wei, Levine, Alan M., Morgan, Edward H., ...
We report on the X-ray spectral behavior of the exceptionally bright X-ray nova XTE J1550-564 during its 1998-99 outburst. Our study is based on 209 pointed observations using the PCA and HEXTE...
Sobczak, Gregory J., McClintock, Jeffrey E., Remillard, Ronald A., Cui, Wei, Levine, Alan M., Morgan, Edward H., ...
Utilizing observations obtained with the Rossi X-ray Timing Explorer, we examine correlations between the properties of 0.08-22 Hz variable frequency QPOs and the X-ray spectral parameters for the...
Rubenstein, Eric P., Bailyn, Charles D.
We consider the effect of binary stars on the main-sequence luminosity functions observed in the core of globular clusters, with specific reference to NGC 6752. We find that mass segregation results...
Cataclysmic Variables and a Candidate Helium White Dwarf in the Globular Cluster NGC 6397 (1998)
Edmonds, Peter D., Grindlay, Jonathan E., Cool, Adrienne M., Cohn, Haldan N., Lugger, Phyllis N., Bailyn, Charles D.
We have used HST/FOS to study faint UV stars in the core of the nearby globular cluster NGC 6397. We confirm the presence of a 4th cataclysmic variable (CV) in NGC 6397 (CV 4), and we use the...
Cataclysmic Variables and a New Class of Faint UV Stars in the Globular Cluster NGC 6397 (1998)
Cool, Adrienne M., Grindlay, Jonathan E., Cohn, Haldan N., Lugger, Phyllis N., Bailyn, Charles D.
We present evidence that the globular cluster NGC 6397 contains two distinct classes of centrally-concentrated UV-bright stars. Color-magnitude diagrams constructed from U, B, V, and I data obtained...
RXTE Spectral Observations of the 1996-97 Outburst of the Microquasar GRO J1655-40 (1998)
Sobczak, Gregory J., McClintock, Jeffrey E., Remillard, Ronald A., Bailyn, Charles D., Orosz, Jerome A.
Excellent coverage of the entire 16-month 1996-97 outburst cycle of GRO J1655-40 was provided by RXTE. We present a full spectral analysis of these data, which includes 52 PCA spectra from 2.5-20 keV...
The Distribution of Collisionally Induced Blue Stragglers in the Colour-Magnitude Diagram (1998)
Sills, Alison, Bailyn, Charles D.
A primary production mechanism for blue stragglers in globular clusters is thought to be collisionally-induced mergers, perhaps mediated by dynamical encounters involving binary stars. We model the...
Orbital Parameters for the Soft X-ray Transient 4U 1543-47: Evidence for a Black Hole (1997)
Orosz, Jerome A., Jain, Raj K., Bailyn, Charles D., McClintock, Jeffrey E., Remillard, Ronald A.
(shortened) Spectroscopic observations of the soft X-ray transient 4U 1543-47 reveal a radial velocity curve with a period of P=1.123 +/- 0.008 days and a semi-amplitude of K_2 = 124 +/- 4 km/sec....
The Mass Distribution of Stellar Black Holes (1997)
Bailyn, Charles D., Jain, Raj K., Coppi, Paolo, Orosz, Jerome A.
We examine the distribution of masses of black holes in transient low mass X-ray binary systems. A Bayesian analysis suggests that it is probable that six of the seven systems with measured mass...
Multifrequency Observations of the Galactic Microquasars GRS1915+105 and GROJ1655-40 (1997)
Remillard, Ronald A., Morgan, Edward H., McClintock, Jeffrey E., Bailyn, Charles D., Orosz, Jerome A., Greiner, Jochen
The two galactic `microquasars' with superluminal radio jets have been quite active during 1996, generatinga variety of studies involving both NASA and ground-based observatories. GRS~1915+105 has...
Evolution of Stellar Collision Products in Globular Clusters -- I. Head-on Collisions (1997)
Sills, Alison, Lombardi, James C., Bailyn, Charles D., Demarque, Pierre, Rasio, Frederic A., Shapiro, Stuart L.
We explore the evolution of collisionally merged stars in the blue straggler region of the HR diagram. The starting models for our stellar evolution calculations are the results of the smoothed...
An Optical Precursor to the Recent X-ray Outburst of the Black Hole Binary GRO J1655-40 (1997)
Orosz, Jerome A., Remillard, Ronald A., Bailyn, Charles D., McClintock, Jeffrey E.
The All Sky Monitor on the Rossi X-ray Timing Explorer detected an X-ray (2-12 keV) outburst from the black hole binary GRO J1655-40 beginning near April 25, 1996. Optical photometry obtained April...
Orosz, Jerome A., Bailyn, Charles D.
We report photometric and spectroscopic observations of the black hole binary GRO J1655-40 in complete quiescence. In contrast to the 1995 photometry, the light curves from 1996 are almost completely...
HST Images of the Eclipsing Pulsar B1957+20 (1995)
Fruchter, Andrew S., Bookbinder, Jay, Bailyn, Charles D.
We have obtained images of the eclipsing pulsar binary PSR~B1957+20 using the Planetary Camera of the Hubble Space Telescope. The high spatial resolution of this instrument has allowed us to separate...