Infrared observations of symbiotic stars, together with simultaneous optical and ultraviolet observations are demonstrated to be a powerful tool for the...
We obtained simultaneously recorded time series of broadband images of a sunspot close to the disk center at the German Vacuum Tower Telescope, Tenerife, in two...
Infrared photometry of a sunspot near the disk center
A time series of broadband images of a sunspot near the disk center was obtained simultaneously in two wavelength bands at 0.56 mu m and 1.55 mu m at the German...
Infrared photometry of open clusters - The main sequence of NGC 752
New infrared photometry of a sample of 39 stars in the open cluster NGC 752 is presented. These observations confirm the bimodality of the main sequence...