Evidence of a Black Hole in the X-Ray Transient GS 1354–64 (=BW Circini)
The Astrophysical Journal American Astronomical Society 613:2 (2004) l133-l136
NOAO Fundamental Plane Survey. I. Survey design, redshifts, and velocity dispersion data
Astronomical Journal 128:4 (2004) 1558-1569
Abstract:
We introduce the NOAO Fundamental Plane Survey (NFPS), a wide-field imaging/spectroscopic study of rich, low-redshift galaxy clusters. The survey targets X-ray-selected clusters at 0.010 < z < 0.067, distributed over the whole sky, with imaging and spectroscopic observations obtained for 93 clusters. This data set will be used in investigations of galaxy properties in the cluster environment and of large-scale velocity fields through the fundamental plane. In this paper, we present details of the cluster sample construction and the strategies employed to select early-type galaxy samples for spectroscopy. Details of the spectroscopic observations are reported. From observations of 5479 red galaxies, we present redshift measurements for 5388 objects and internal velocity dispersions for 4131. The velocity dispersions have a median estimated error ∼7%. The NFPS has ∼15% overlap with previously published velocity dispersion data sets. Comparisons to these external catalogs are presented and indicate typical external errors of ∼8%.Long term variability of Cygnus X-1
Astronomy & Astrophysics EDP Sciences 425:3 (2004) 1061-1068
The binary progenitor of Tycho Brahe's 1572 supernova
Nature Springer Nature 431:7012 (2004) 1069-1072
The relationship between radio luminosity and black hole mass in optically selected quasars
\mnras 353 (2004) L45-L49-L45-L49