4 papers · 1 filter
Use of neural networks for the identification of new z>=3.6 QSOs from FIRST-SDSS DR5
R. Carballo, J. I. Gonzalez-Serrano, C. R. Benn +1
We aim to obtain a complete sample of redshift > 3.6 radio QSOs from FIRST sources having star-like counterparts in the SDSS DR5 photometric survey (r<=20.2). We found that simple…
Radio spectra and polarisation properties of radio-loud Broad Absorption Line Quasars
F. M. Montenegro-Montes, K. -H. Mack, M. Vigotti +5
We present multi-frequency observations of a sample of 15 radio-emitting Broad Absorption Line Quasars (BAL QSOs), covering a spectral range between 74 MHz and 43 GHz. They display…
A FIRST-APM-SDSS survey for high-redshift radio QSOs
R. Carballo, J. I. Gonzalez-Serrano, F. M. Montenegro-Montes +4
We selected from VLA-FIRST a sample of 94 objects starlike in SDSSS, and with APM colour O-E>2, i.e. consistent with their being high-z QSOs. 78 candidates were classified spectros…
OSIRIS Software: The Mask Designer Tool
J. I. Gonzalez-Serrano, M. Sanchez-Portal, H. Castaneda +4
OSIRIS is a Day One instrument that will be available at the 10m GTC telescope which is being built at La Palma observatory in the Canary Islands. This optical instrument is design…