Giovedì 6 giugno 2019, ore 11:00

Osservatorio Astrofisico di Torino, Sala Seminari di Villa Magliola

Scientific exploitation of a new catalogue of ALMA calibrators

Dr. Matteo Bonato

INAF – Istituto di Radioastronomia


I will present a new catalogue of ALMA observations of 3364 bright, compact radio sources, mostly blazars, used as calibrators. These sources were observed between 2011 May and 2018 July, for a total of 47115 pointings in different ALMA bands and epochs. These data can be exploited for many different scientific purposes. I will show some examples of them. In particular, I will present the validation of the photometry given in the new Planck multifrequency Catalogue of Non-Thermal sources (for which an external validation was not possible so far) and the radio source counts extrapolated to the effective frequencies of ALMA bands 4, 6, 7, 8, and 9 (145, 233, 285, 467, and 673 GHz, respectively), where direct measurements are scanty, especially at the three highest frequencies. I will also illustrate the main statistical properties of the sample and the variability properties of the sources in different ALMA bands.