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Detection of the lensing galaxy in HE 1104-1805
F. Courbin, C. Lidman, P. Magain
We report on deep IR imaging of the double quasar HE 1104-1805. A new image deconvolution technique has been applied to the data in order to optimally combine the numerous frames o…
Stellar populations from adaptive optics observations: four test cases
T. R. Bedding, D. Minniti, F. Courbin +1
We describe a first attempt to apply adaptive optics to the study of resolved stellar populations in galaxies. Advantages over traditional approaches are (i) improved spatial resol…
The geometry of the quadruply imaged quasar PG 1115+080; implications for Ho
F. Courbin, P. Magain, C. R. Keeton +4
Time delay measurements have recently been reported for the lensed quasar PG 1115+080. These measurements can be used to derive Ho, but only if we can constrain the lensing potenti…
The LMC transition star R84 and the core of the LH 39 OB association
M. Heydari-Malayeri, F. Courbin, G. Rauw +3
On the basis of sub-arcsecond optical imaging we resolve and study the core components of the LMC OB association LH 39. The central star of the association, the rare transition obj…
Deconvolution with correct sampling
P. Magain, F. Courbin, S. Sohy
A new method for improving the resolution of astronomical images is presented. It is based on the principle that sampled data cannot be fully deconvolved without violating the samp…