FIRST "Winged" and X-shaped Radio Source Candidates: II. New Redshifts (2008)
Cheung, C. C., Healey, Stephen E., Landt, Hermine, Kleijn, Gijs Verdoes, Jordán, Andrés
We report optical spectroscopic observations of X-shaped radio sources with the Hobby-Eberly Telescope and Multiple-Mirror Telescope, focused on the sample of candidates from the FIRST survey...
Sivakoff, Gregory R., Jordán, Andrés, Juett, Adrienne M., Sarazin, Craig L., Irwin, Jimmy A.
Chandra X-ray observations routinely resolve tens to hundreds of low-mass X-ray binaries (LMXBs) per galaxy in nearby massive early-type galaxies. These studies have raised important issues regarding...
A Transient Black-Hole Low-Mass X-Ray Binary Candidate in Centaurus A (2008)
Sivakoff, Gregory R., Kraft, Ralph P., Jordán, Andrés, Juett, Adrienne M., Evans, Daniel A., Forman, William R., ...
We report the discovery of a bright transient X-ray source, CXOU J132518.2-430304, towards Centaurus A (Cen A) using six new Chandra X-Ray Observatory observations in 2007 March--May. Between 2003...
2 European Southern Observatory, Karl-Schwarzschild-Str. 2 (2008)
G. Fabbiano, Gregory R. Sivakoff, Andrés Jordán, Adrienne M. Juett, Craig L. Sarazin, ...
Abstract. Chandra observations of early-type galaxies have resolved large populations of lowmass X-ray binaries (LMXBs) in early-type galaxies. The majority of these observations have been snapshots...
Variable Low-Mass X-ray Binaries in Early-Type Galaxies (2007)
Sivakoff, Gregory R., Jordán, Andrés, Juett, Adrienne M., Sarazin, Craig L., Irwin, Jimmy A.
As the Chandra X-ray Observatory mission matures, increasing numbers of nearby galaxies are being observed multiple times, sampling the variability of extragalactic X-ray binaries on timescales...
Normal Globular Cluster Systems in Massive Low Surface Brightness Galaxies (2007)
Villegas, Daniela, Kissler-Patig, Markus, Jordán, Andrés, Goudfrooij, Paul, Zwaan, Martin
We present the results of a study of the globular cluster systems of 6 massive spiral galaxies, originally cataloged as low surface brightness galaxies but here shown to span a wide range of central...
Andrés Jordán, Gregory R. Sivakoff, Dean E. Mclaughlin, John P. Blakeslee, Daniel A. Evans, Ralph P. Kraft, ...
We present results of Hubble Space Telescope and Chandra X-Ray Observatory observations of globular clusters (GCs) and low-mass X-ray binaries (LMXBs) in the central regions of Centaurus A. Out of...
Sivakoff, Gregory R., Jordán, Andrés, Sarazin, Craig L., Blakeslee, John P., E}, Patrick C{\^ O}t{\', Ferrarese, Laura, ...
(Abridged) Chandra and Hubble ACS observations of 11 early-type galaxies probe the low-mass X-ray binary (LMXB) - globular cluster (GC) connection. We explore the optical properties of 270 GCs with...
Gregory R. Sivakoff, Andrés Jordán, Craig L. Sarazin, John P. Blakeslee, Patrick Côté, Laura Ferrarese, ...
LMXBs form efficiently in GCs. By combining Chandra and HST ACS observations of 11 massive early-type galaxies in the Virgo Cluster, we use the most accurate identification of LMXBs and GCs to date...