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A multiple-beam CLEAN for imaging intra-day variable radio sources
Methods: data analysis – Techniques: image processing – Radio continuum: general
2011/10/13
The CLEAN algorithm, widely used in radio interferometry for the deconvolution of radio images, performs well only if the raw radio image (dirty image) is, to good approximation, a simple convolution ...
Multiple stellar populations in the Globular Clusters NGC1851 and NGC6656 (M22)
Stars: abundances – Stars: atmospheres – Stars: Population II – Galaxy: glob- ular clusters
2011/9/30
In the last years, photometric and spectroscopic evidence has demonstrated that many, maybe all the Globular Clusters (GC) host multiple stellar populations. High-resolution spectroscopy has establish...
An All Sky Extrasolar Planet Survey with new generation multiple object Doppler instruments at Sloan telescope
Sky Extrasolar Planet Doppler instruments Sloan telescope
2009/6/30
An All Sky Extrasolar Planet Survey with new generation multiple object Doppler instruments at Sloan telescope。
CCD OBSERVATIONS OF VISUAL DOUBLE AND MULTIPLE STARS AT THE BELGRADE OBSERVATORY
MULTIPLE STARS CCD measurements Belgrade Large Refractor ST-6 camera
2009/3/19
The author presents her CCD measurements of 105 double and
multiple stars performed with a ST-6 camera on the Belgrade Large Refractor (Zeiss
65/1055 cm).
Using the 2-m telescope of the Bulgarian National Astronomical
Observatory at Rozhen observations of twenty multiple stars were carried out during
one whole night - October 30/31, and, also, during ...