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COSIS: Coimbra Observatory Solar Information System

Authors: Dorotovic, I.; J. Fernandes; Fonseca, J. M.; Moreira, C.; Ribeiro, R. A.

Ref.: Solar and Stellar Activity Cycles, 26th meeting of the IAU, Joint Discussion 8, 17-18 August 2006, Prague, Czech Republic (2006)

Abstract: In 2006, the Astronomical Observatory of the University in Coimbra (Portugal) celebrates the 80th anniversary of performing the first spectroheliographic observations in Coimbra. Prof. Francisco Costa Lobo (1864-1945) installed the spectroheliograph in Coimbra in the 1920s. Full-disk spectroheliograms have been routinely taken in the Ca II K-line (K1 and K3) and in 1990 regular observations in the H-alpha line have also started. The instrument itself is a twin of the spectroheliograph operated at the Observatoire de Meudon, France. Since 2002 we digitalize backwards our collection of more than 30000 solar images. In 2005 we started the project COSIS (Coimbra Observatory : Solar Information System). The purpose of the project (financed by FCT, MCES, Lisbon, Portugal: POCTI-CTE-AST/58333/2004) is to develop a software tool for automatic image processing and feature recognition of sunspots (K1), chromospheric plages (K3), and filaments (Ha) for usage by astronomers and other interested parties. The project team is composed by astronomers and computer science researchers from two institutions: the Coimbra Observatory, Santa Clara, Portugal and UNINOVA-CA3, Campus FCT-UNL, Caparica, Portugal. At this stage of the project only automatic image processing of sunspots is being performed and the first results are presented in this contribution. In the future, the automatic feature recognition process can be extended to chromospheric spectroheliograms (K3 and H-alpha) as well. For more details please refer to the official web page of the project (http://www2.uninova.pt/ca3/en/project_COSIS.htm) and the COSIS interface is available at the site http://cosis.uninova.pt.

URL: cdsads.u-strasbg.fr