Publications (79)
A multi-wavelength view of AB Dor's outer atmosphere - Simultaneous X-ray and optical spectroscopy at high cadence
S. Lalitha, B. Fuhrmeister, U. Wolter +3
We study the chromosphere and corona of the ultra-fast rotator AB Dor A at high temporal and spectral resolution using simultaneous observations with XMM-Newton in the X-rays, VLT/…
An infrared study of Galactic OH/IR stars. III. Variability properties of the Arecibo sample
F. M. Jiménez-Esteban, D. Engels, D. S. Aguado +2
We present the results of a near-infrared (NIR) monitoring program carried out between 1999 and 2005 to determine the variability properties of the Arecibo sample of OH/IR stars. T…
The LOFAR long baseline snapshot calibrator survey
J. Moldón, A. T. Deller, O. Wucknitz +82
Aims. An efficient means of locating calibrator sources for International LOFAR is developed and used to determine the average density of usable calibrator sources on the sky for s…
Water vapour masers in long-period variable stars. I. RX Boo and SV Peg
A. Winnberg, D. Engels, J. Brand +2
We wish to understand the reasons for the strong variability of H2O masers in circumstellar shells of late-type stars. We monitored RX Boo and SV Peg in the 22-GHz maser line of wa…
The Hamburg/SAO Survey for Emission-Line Galaxies. III. The Third List of 81 Galaxies
U. Hopp, D. Engels, R. F. Green +10
We present the third list with results {Tables 2 to 6 are available only in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.…
The HRX-BL Lac sample - evolution of BL Lac objects
V. Beckmann, D. Engels, N. Bade +1
The unification of X-ray and radio selected BL Lacs has been an outstanding problem in the blazar research in the past years. Recent investigations have shown that the gap between…