Measuring the population of obscured quasars is one of the key issues in understanding the evolution of active galactic nuclei (AGNs). With a redshift completeness of 99%, the X-ray sources detected in the Chandra Deep Field South (CDF-S) provide the best sample for this issue. In this paper, we study the population of obscured quasars in CDF-S by

We present evidence that recently identified massive rubidium-rich AGB stars also played an important role as sources of certain long-lived and short-lived radionuclides to the early solar nebula, just during early stages of meteorite formation.

Magnetic fields are an important but largely unknown ingredient of planetary nebulae. They have been detected in oxygen-rich asymptotic giant branch (AGB) and post-AGB stars, and may play a role in the shaping of their nebulae. Here we present SCUBA submillimetre polarimetric observations of four bipolar planetary nebulae and post-AGB stars

The reduced photometric data of HD 172189 are provided. The original data were obtained from the XIII STEPHI campaign carried out between 7-28 June 2004 by three observatories: Observatorio del Teide (Izana, Tenerife, Spain), Observatorio Astronomico Nacional de San Pedro Martir (Baja California, Mexico) and Xinglong Station of the Beijing

During INTEGRAL's Performance and Verification phase (December 2002) a type-I outburst of the Be/X-ray binary EXO 2030+375 was detected. A pulse period of 41.691798±0.000016 s was found, and the ] luminosity in the 5-300 keV energy range was 9.7×10^{36} erg s^{-1} for a distance of 7.1 kpc. Two unusual features were found in the light curve, with

Using the Major Atmospheric Gamma Imaging Cerenkov Telescope (MAGIC), we have observed the nearest ultraluminous infrared galaxy, Arp 220, for about 15 hr. No significant signal was detected within the dedicated amount of observation time. The first upper limits to the very high energy γ-ray flux of Arp 220 are herein reported and compared with