6 research outputs found
Las excavaciones en la muralla romana de la calle de la TapinerÃa, de Barcelona
La disposición de la muralla romana de Barcino, construida durante el Bajo Imperio, y que es la base de la revalorización urbanÃstica del barrio antiguo de la ciudad es conocida desde tiempo en sus lÃneas generales y ha sido publicada últimamente por Florensa. Aquà vamos a resumir los resultados arqueológicos alcanzados en el estudio de un pequeño sector de este recinto, el comprendido entre la plaza de Ramón Berenguer III y la Baixada de la Canonja, especialmente en lo que se refiere a la técnica constructiva y a la forma como se han efectuado los trabajos, de la que es importante quede constancia inmediata
The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
The Sloan Digital Sky Survey III (SDSS-III) presents the first spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS). This ninth data release (DR9) of the SDSS project includes 535,995 new galaxy spectra (median z=0.52), 102,100 new quasar spectra (median z=2.32), and 90,897 new stellar spectra, along with the data presented in previous data releases. These spectra were obtained with the new BOSS spectrograph and were taken between 2009 December and 2011 July. In addition, the stellar parameters pipeline, which determines radial velocities, surface temperatures, surface gravities, and metallicities of stars, has been updated and refined with improvements in temperature estimates for stars with T_eff-0.5. DR9 includes new stellar parameters for all stars presented in DR8, including stars from SDSS-I and II, as well as those observed as part of the SDSS-III Sloan Extension for Galactic Understanding and Exploration-2 (SEGUE-2). The astrometry error introduced in the DR8 imaging catalogs has been corrected in the DR9 data products. The next data release for SDSS-III will be in Summer 2013, which will present the first data from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) along with another year of data from BOSS, followed by the final SDSS-III data release in December 2014