We present infrared observations of the counterparts to the X- ray transients SLX 1746-331 and XTE J1810-189 obtained with the 6.5m Magellan Baade telescope at Las Campanas Observatory. Both sources were re-observed with the PANIC camera in order to confirm the candidate counterparts proposed in ATels #1252 and #1508. SLX 1746-331.- The black hole

In order to understand the parameters of the standard model of electroweak and strong interactions (coupling constants, masses, mixing angles) one needs to embed the standard model into some larger theory that accounts for the observed values. This means some additional sector is needed that fixes and stabilizes the values of the fundamental

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The chronology of bulge and disk formation is a major unsolved issue in galaxy formation, which impacts on our global understanding of the Hubble sequence. We present colours of the nuclear regions of intermediate-redshift disk galaxies, with the aim of obtaining empirical information of ages of bulges at intermediate z. We work with a sample of

A subcatalogue with positions and magnitudes of stars brighter than V = 16 and declinations between -30° and 0° is presented. The observations have been carried out with the Círculo Meridiano Automático de San Fernando at the Carlos Ulrrico Cesco Observatory in San Juan (Argentina) in the framework of an agreement between the ROA and the OAFA. The