Two previously unknown variable stars in the crowded central region of the globular cluster NGC 6981 are presented. The observations were made using the electron multiplying CCD (EMCCD) camera at the Danish 1.54 m Telescope at La Silla, Chile. The two variables were not previously detected by conventional CCD imaging because of their proximity to a bright star. This discovery demonstrates that EMCCDs are a powerful tool for performing high-precision time-series photometry in crowded fields and near bright stars, especially when combined with difference image analysis.

Skottfelt, J., Bramich, D.m., Figuera Jaimes, R., Jørgensen, U.g., Kains, N., W Harpsøe, K.b., et al. (2013). EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981 (Corrigendum). ASTRONOMY & ASTROPHYSICS, 558, C1 [10.1051/0004-6361/201321430e].

EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981 (Corrigendum)

Mancini, L.;
2013-01-01

Abstract

Two previously unknown variable stars in the crowded central region of the globular cluster NGC 6981 are presented. The observations were made using the electron multiplying CCD (EMCCD) camera at the Danish 1.54 m Telescope at La Silla, Chile. The two variables were not previously detected by conventional CCD imaging because of their proximity to a bright star. This discovery demonstrates that EMCCDs are a powerful tool for performing high-precision time-series photometry in crowded fields and near bright stars, especially when combined with difference image analysis.
2013
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/05 - ASTRONOMIA E ASTROFISICA
English
Skottfelt, J., Bramich, D.m., Figuera Jaimes, R., Jørgensen, U.g., Kains, N., W Harpsøe, K.b., et al. (2013). EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981 (Corrigendum). ASTRONOMY & ASTROPHYSICS, 558, C1 [10.1051/0004-6361/201321430e].
Skottfelt, J; Bramich, Dm; Figuera Jaimes, R; Jørgensen, Ug; Kains, N; W Harpsøe, Kb; Liebig, C; Penny, Mt; Alsubai, Ka; Andersen, Jm; Bozza, V; Brown...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/204785
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