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Size and shape of Chariklo from multi-epoch stellar occultations
R Leiva, B Sicardy, J I B Camargo +28
We use data from five stellar occultations observed between 2013 and 2016 to constrain Chariklo's size and shape, and the ring reflectivity. We consider four possible models for Ch…
Identification of Faint Chandra X-ray Sources in the Core-Collapsed Globular Cluster NGC 6752
Phyllis M. Lugger, Haldan N. Cohn, Adrienne M. Cool +2
We have searched for optical identifications for 39 Chandra X-ray sources that lie within the 1.9 arcmin half-mass radius of the nearby (d = 4.0 kpc), core-collapsed globular clust…
The structure of Chariklo's rings from stellar occultations
D. Bérard, B. Sicardy, J. I. B. Camargo +79
Two narrow and dense rings (called C1R and C2R) were discovered around the Centaur object (10199) Chariklo during a stellar occultation observed on 2013 June 3. Following this disc…
New Cataclysmic Variables and other Exotic Binaries in the Globular Cluster 47 Tucanae
L. E. Rivera Sandoval, M. van den Berg, C. O. Heinke +8
We present 22 new (+3 confirmed) cataclysmic variables (CVs) in the non core-collapsed globular cluster 47 Tucanae (47 Tuc). The total number of CVs in the cluster is now 43, the l…