The first day of the conference “Science with the GTC” which is held in Puebla (Mexico) was focused on the scientific results obtained with OSIRIS, an optical instrument for imaging and spectroscopy. On the second day CanariCam, a camera-spectrograph-polarimeter in the middle infrared competed for attention. The two instruments are attached to the Gran Telescopio CANARIAS (GTC). The GTC works at optical and infrared wavelengths, and is sited in the Observatorio del Roque de los Muchachos (ORM) on the Island of La Palma (Canary Islands).

The specialized Journal The Astrophysical Journal Letters (ApJL) is publishing today, in its on-line version, a study led by the Institute of Astrophysics of the Canaries (IAC) in which the researchers have identified a type of giant stars (AGB which means Asymptotic Giant Branch) of the second generation, and rich in aluminium, in four globular clusters with a range of metallicities and ages in the Milky Way. The detection of these stars on the giant branch of the well known Hertzsprung-Russell (HR) diagram is what is expected according to theoretical models of stellar evolution, and

Astrophysics has been the main theme of the first day of the conference "Science with the GTC", that is held in Puebla (México). This is a multidisciplinary meeting: from exoplanets to asteroids, from black holes to gamma ray bursters, via supernovae and brown dwarfs. All these subjects, and many others, have been discussed during the twenty six presentations which took place today.

It will be held from 2nd to 4th December in Puebla (Mexico) and will cover the scientific results obtained with the telescope as well as the present and future of the instruments OSIRIS, CanariCam and Emir

An international team of researchers is publishing in Nature the discovery of the microquasar M81 ULS-1, an ultraluminous source in the spiral galaxy M81, with data obtained with the Keck telescopes in 2010 and with the Gran Telescopio Canarias (GTC) in 2015.

The meeting, in which personnel of the TIC of the Spanish universities and research centres are taking part, can be followed with streaming, and for the first time with 4k definition on the website http://www.rediris.es/jt/jt2015