Plenoptic wavefront sensor for free-space optical communications
A plenoptic wavefront sensor is proposed for the measurement of the atmospheric turbulence on satellite-toground optical communications. The design will be...
PN G135.9+55.9: a New, Extremely Oxygen-Poor Planetary Nebula in the Galactic Halo
We show that SBS1150+599A is most probably a planetary nebula located in the Galactic halo (becoming PN G135.9+55.9). Our photoionization models indicate that...
Point Spread Function Analysis of the NACO Instrument at the VLT
In this work an analytical description of the NACO PSF with a minimum number of parameters is sought. These parameters are governed by the observational...
Follow-up RXTE PCA observations of the transient source consistent with the position of SAX J1808.4-3658 (ATEL#505) showed clear coherent pulsations at...
One of the calibration problems posed by the new generation of mid-infrared instrumentation on 8--10~m class telescopes is that of polarimetric calibration. To...