114 citations · 182 across the 8 of their papers we have counts for
8 papers
Hunting for Brown Dwarfs in the Globular Cluster M4: 2nd epoch HST NIR observations
Andrea Dieball, L. R. Bedin, Christian Knigge +5
We present an analysis of the second epoch HST WFC3 F110W near-Infrared (NIR) imaging data of the globular cluster M4. The new dataset suggests that one of the previously suggested…
Formalism and quality of a proper motion link with extragalactic objects for astrometric satellite missions
M. Metz, M. Geffert
The accuracy of the link of the proper motion system of astrometric satellite missions like AMEX and GAIA is discussed. Monte-Carlo methods were used to simulate catalogues of posi…
Photometric and kinematic studies of open star clusters. III. NGC 4103, NGC 5281, and NGC 4755
Joerg Sanner, Jens Brunzendorf, Jean-Marie Will +1
We present CCD photometry and proper motion studies of the three open star clusters NGC 4103, NGC 5281, and NGC 4755 (kappa Cru). By fitting isochrones to the colour magnitude diag…
A proper motion study of the globular cluster M10
L. Chen, M. Geffert, J. J. Wang +2
We present the first proper motion study of M10 (NGC6254). Absolute proper motions of about 532 stars in the field of the globular cluster M10 were determined with respect to Hippa…
Photometric and Kinematic Studies of Open Star Clusters I: NGC 581 (M 103)
Joerg Sanner, Michael Geffert, Jens Brunzendorf +1
We present CCD photometry and a proper motion study of the young open star cluster, NGC 581 (M 103). Fitting isochrones to the colour magnitude diagram, we found an age of 16 +/- 4…
Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XII. Ground-Based Monitoring of 3C 390.3
M. Dietrich, B. M. Peterson, P. Albrecht
Results of a ground-based optical monitoring campaign on 3C 390.3 in 1994-95 are presented. The broad-band fluxes (B, V, R, and I), the spectrophotometric optical continuum flux F(…