Laser guide star

Jacques-Edouard Moser, Christophe Moser, Volker Günter Zagolla

A device for self-tracking a light source, including a focusing optical device configured to focus incoming light to a focal spot, an adaptive device configured to reflect the light of the focal spot and arranged to provide for a phase change at an area of ...

2016

VLT adaptive optics search for luminous substructures in the lens galaxy towards SDSS J0924+0219

Frédéric Courbin, Georges Meylan, Malte Tewes, Nicolas Jacques Joseph Marie Cantale

The anomalous flux ratios between quasar images are suspected of being caused by substructures in lens galaxies. We present new deep and high-resolution H and Ks imaging of the strongly lensed quasar SDSS J0924+0219 obtained using the ESO VLT with adaptive ...

2011

First case of strong gravitational lensing by a QSO: SDSS J0013+1523 at z=0.120

Frédéric Courbin, Georges Meylan, Malte Tewes, François Henri Ambroise Rérat

We present the first case of strong gravitational lensing by a QSO: SDSS J0013 + 1523 at z = 0.120. The discovery is the result of a systematic search for emission lines redshifted behind QSOs, among 22 298 spectra of the SDSS data release 7. Apart from th ...

2010

A sharp look at the gravitationally lensed quasar SDSS J0806+2006 with laser guide star adaptive optics at the VLT

Frédéric Courbin, Georges Meylan, Alexander Patrick Eigenbrod

We present the first VLT near-IR observations of a gravitationally lensed quasar, using adaptive optics and laser guide star. These observations can be considered as a test bench for future systematic observations of lensed quasars with adaptive optics, ev ...

2008

Laser guide star

Self-Tracking Solar Concentrator Device

VLT adaptive optics search for luminous substructures in the lens galaxy towards SDSS J0924+0219

First case of strong gravitational lensing by a QSO: SDSS J0013+1523 at z=0.120

A sharp look at the gravitationally lensed quasar SDSS J0806+2006 with laser guide star adaptive optics at the VLT

Graph Chatbot

Self-Tracking Solar Concentrator Device

VLT adaptive optics search for luminous substructures in the lens galaxy towards SDSS J0924+0219

First case of strong gravitational lensing by a QSO: SDSS J0013+1523 at z=0.120

A sharp look at the gravitationally lensed quasar SDSS J0806+2006 with laser guide star adaptive optics at the VLT