14 citations · 19 across the 4 of their papers we have counts for
4 papers
UBVRI-KC Photometry of NGC~2323 and NGC~2539 Open Clusters
Inci Akkaya Oralhan, Raul Michel, William J. Schuster +3
The open clusters NGC 2323 and NGC 2539 have been analysed using CCD UBV(RI)KC photometric data, observed at the San Pedro Martir Observatory. Cluster memberships have been determi…
CCD Photometry of Twenty Open Clusters
Inci Akkaya Oralhan, Yüksel Karataş, William J. Schuster +2
Fundamental astrophysical parameters have been derived for 20 open clusters (O\!Cs) using CCD~ photometric data observed with the 84~cm telescope at the San Pedro Má…
Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. IV. Statistical analysis
J. Krautter, F. -J. Zickgraf, I. Appenzeller +8
We present the statistical evaluation of a count rate and area limited complete sample of the ROSAT All-Sky Survey (RASS) comprising 674 sources. The RASS sources are located in si…
Transient supersoft X-ray emission from V751 Cyg during the optical low-state
J. Greiner, G. H. Tovmassian, R. DiStefano +4
We have observed V751 Cyg with the ROSAT HRI during its recent optical low state and clearly detect it at a count rate of 0.015 cts/s. The X-ray intensity is a factor of ~20 higher…