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Hard 2-10kev X-ray selected sources
We present Chandra and Spitzer data for the 186, extragalactic, hard 2-10keV X-ray selected sources, which lie in the central part of the Chandra Deep Field South (CDFS). For... -
QSOs in the M3 field
We present results from a variability and proper motion (VPM) search for QSOs in the field around M3. The VPM search is demonstrated to be powerful technique for efficiently... -
Stellar Catalogue in the Chandra DFS
Stellar catalogues in five passbands (UBVRI) over an area of approximately 0.3{deg}^2^, comprising about 1200 objects, and in seven passbands (UBVRIJK) over approximately... -
Lyman alpha forest in HE 0515-4414
We investigated HST/STIS and VLT/UVES spectra of the bright QSO HE 0515-4414 (z_em_=1.73, B=15.0) to study the Lyman alpha forest in the redshift range 0.9 < z < 1.7 at a... -
R-band photometry of SBS1520+530
We present optical R-band light curves of the gravitationally lensed quasar SBS 1520+530 derived from data obtained at the Nordic Optical Telescope, from February 1999 to May... -
Faint Blue Stars near the South Galactic Pole
A search for faint blue stars conducted at the Observatories of Tonantzintla and Minnesota has yielded 8746 objects which are somewhat blue. The data file is organized into... -
LQRF: Large Quasar Reference Frame
The LQRF (Large Quasar Reference Frame) was built with the care of avoiding wrong matches of its constituents quasars, of homogenizing the astrometry from the different catalogs... -
144MHz radio fluxes of z>5 quasars
Optically luminous quasars at z>5 are important probes of super-massive black hole (SMBH) formation. With new and future radio facilities, the discovery of the brightest...
