X-ray and Optical Study of Low Core Density Globular Clusters NGC6144 and E3 (2009)
Lan, Shih Hao, Kong, Albert K. H., Verbunt, Frank, Lewin, Walter H. G., Bassa, Cees, Anderson, Scott F., ...
We report on the Chandra X-ray Observatory and Hubble Space Telescope observation of two low core density globular clusters, NGC6144 and E3. By comparing the number of X-ray sources inside the...
X-ray Sources and Their Optical Counterparts in the Galactic Globular Cluster M12 (NGC 6218) (2009)
Lu, Ting-Ni, Kong, Albert K. H., Bassa, Cees, Verbunt, Frank, Lewin, Walter H. G., Anderson, Scott F., ...
We study a Chandra X-ray Observatory ACIS-S observation of the Galactic globular clusterM12. With a 26 ks exposure time, we detect 6 X-ray sources inside the half-mass radius (2.16 arcminutes) of...
Wang, Zhongxiang, Bassa, Cees, Cumming, Andrew, Kaspi, Victoria M.
We report on optical imaging of the X-ray binary SAX J1808.4-3658 with the 8-m Gemini South Telescope. The binary, containing an accretion-powered millisecond pulsar, appears to have a large periodic...
Nelemans, Gijs, Voss, Rasmus, Roelofs, Gijs, Bassa, Cees
We present HST/WFPC2, GALEX and Chandra observations of the position of the type Ia supernova SN2007sr in the Antennae galaxies, taken before the explosion. No source is found in any of the...
On the detection of the progenitor of the type Ia supernova 2007on (2008)
Roelofs, Gijs, Bassa, Cees, Voss, Rasmus, Nelemans, Gijs
We present new Chandra X-ray observations and detailed astrometry of the field of the type Ia supernova 2007on, for which the detection of a likely progenitor in archival Chandra data was recently...
An eccentric binary millisecond pulsar in the galactic plane (2008)
Champion, David J., Ransom, Scott M., Lazarus, Patrick, Camilo, Fernando, Bassa, Cees, Kaspi, Victoria M., ...
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+0327, a radio pulsar...
An eccentric binary millisecond pulsar in the galactic plane (2008)
Champion, David J., Ransom, Scott M., Lazarus, Patrick, Camilo, Fernando, Bassa, Cees, Kaspi, Victoria M., ...
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+0327, a radio pulsar...
An eccentric binary millisecond pulsar in the galactic plane (2008)
Champion, David J., Ransom, Scott M., Lazarus, Patrick, Camilo, Fernando, Bassa, Cees, Kaspi, Victoria M., ...
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+0327, a radio pulsar...
An eccentric binary millisecond pulsar in the galactic plane (2008)
Champion, David J., Ransom, Scott M., Lazarus, Patrick, Camilo, Fernando, Bassa, Cees, Kaspi, Victoria M., ...
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+0327, a radio pulsar...
The discovery of an eccentric millisecond pulsar in the galactic plane (2008)
Champion, David J., Ransom, Scott M., Lazarus, Patrick, Camilo, Fernando, Kaspi, Victoria M., Nice, David J., ...
The evolution of binary systems is governed by their orbital properties and the stellar density of the local environment. Studies of neutron stars in binary star systems offer unique insights into...
An eccentric binary millisecond pulsar in the galactic plane (2008)
Champion, David J., Ransom, Scott M., Lazarus, Patrick, Camilo, Fernando, Bassa, Cees, Kaspi, Victoria M., ...
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+0327, a radio pulsar...
The discovery of an eccentric millisecond pulsar in the galactic plane (2008)
Champion, David J., Ransom, Scott M., Lazarus, Patrick, Camilo, Fernando, Kaspi, Victoria M., Nice, David J., ...
The evolution of binary systems is governed by their orbital properties and the stellar density of the local environment. Studies of neutron stars in binary star systems offer unique insights into...
Tam, Cindy R., Gavriil, Fotis P., Dib, Rim, Kaspi, Victoria M., Woods, Peter M., Bassa, Cees
We present the results of X-ray and near-IR observations of the anomalous X-ray pulsar 1E 1048.1-5937, believed to be a magnetar. This AXP underwent a period of extreme variability during 2001-2004,...
Observational evidence for the origin of X-ray sources in globular clusters (2007)
Verbunt, Frank, Pooley, Dave, Bassa, Cees
Low-mass X-ray binaries, recycled pulsars, cataclysmic variables and magnetically active binaries are observed as X-ray sources in globular clusters. We discuss the classification of these systems,...
Tam, Cindy R., Gavriil, Fotis P., Dib, Rim, Kaspi, Victoria M., Woods, Peter M., Bassa, Cees
(Abridged) We report on new and archival X-ray and near-infrared observations of the anomalous X-ray pulsar 1E 1048.1-5937 performed between 2001-2007 with RXTE, CXO, Swift, HST, and VLT. During its...
The MODEST questions: challenges and future directions in stellar cluster research (2006)
Davies, Melvyn B., Amaro-Seoane, Pau, Bassa, Cees, Dale, Jim, De Angeli, Francesca, Freitag, Marc, ...
We present a review of some of the current major challenges in stellar cluster research, including young clusters, globular clusters, and galactic nuclei. Topics considered include: primordial mass...
The MODEST questions: Challenges and future directions in stellar cluster research (2006)
Davies, Melvyn B., Amaro-Seoane, Pau, Bassa, Cees, Dale, Jim, De Angeli, Francesca, Freitag, Marc, ...
We present a review of some of the current major challenges in stellar cluster research, including young clusters, globular clusters, and galactic nuclei. Topics considered include: primordial mass...
The MODEST questions: challenges and future directions in stellar cluster research (2006)
Davies, Melvyn B., Amaro-Seoane, Pau, Bassa, Cees, Dale, Jim, De Angeli, Francesca, Freitag, Marc, ...
We present a review of some of the current major challenges in stellar cluster research, including young clusters, globular clusters, and galactic nuclei. Topics considered include: primordial mass...
X-ray Sources and their Optical Counterparts in the Globular Cluster M4 (2004)
Bassa, Cees, Pooley, David, Homer, Lee, Verbunt, Frank, Gaensler, Bryan M., Lewin, Walter H. G., ...
We report on the Chandra X-ray Observatory ACIS-S3 imaging observation of the Galactic globular cluster M4 (NGC 6121). We detect 12 X-ray sources inside the core and 19 more within the cluster...