The two-colour EMCCD instrument for the Danish 1.54 m telescope and SONG

J. Skottfelt, D. M. Bramich, M. Hundertmark, U. G. Jørgensen, N. Michaelsen, P. Kjærgaard, J. Southworth, A. N. Sørensen, M. F. Andersen, M. I. Andersen, J. Christensen-Dalsgaard, S. Frandsen, F. Grundahl, K. B W Harpsøe, H. Kjeldsen, P. L. Pallé

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report on the implemented design of a two-colour instrument based on electron-multiplying CCD (EMCCD) detectors. This instrument is currently installed at the Danish 1.54 m telescope at ESO's La Silla Observatory in Chile, and will be available at the SONG (Stellar Observations Network Group) 1m telescope node at Tenerife and at other SONG nodes as well. We present the software system for controlling the two-colour instrument and calibrating the high frame-rate imaging data delivered by the EMCCD cameras. An analysis of the performance of the Two-Colour Instrument at the Danish telescope shows an improvement in spatial resolution of up to a factor of two when doing shift-and-add compared with conventional imaging, and the possibility of doing high-precision photometry of EMCCD data in crowded fields. The Danish telescope, which was commissioned in 1979, is limited by a triangular coma at spatial resolutions below 0″.5, and better results will thus be achieved at the near diffraction-limited optical system on the SONG telescopes, where spatial resolutions close to 0″.2 have been achieved. Regular EMCCD operations have been running at the Danish telescope for several years and produced a number of scientific discoveries, including microlensing detected exoplanets, detecting previously unknown variable stars in dense globular clusters, and discovering two rings around the small asteroid-like object (10199) Chariklo.

Original languageEnglish
JournalAstronomy and Astrophysics
Volume574
DOIs
Publication statusPublished - 1 Feb 2015

Fingerprint

charge coupled devices
telescopes
color
electron
spatial resolution
electrons
asteroid
diffraction
observatory
variable stars
Chile
coma
extrasolar planets
calibrating
European Southern Observatory
asteroids
globular clusters
CCD cameras
software
photometry

Keywords

  • Instrumentation: Detectors
  • Instrumentation: High angular resolution
  • Techniques: Photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Skottfelt, J., Bramich, D. M., Hundertmark, M., Jørgensen, U. G., Michaelsen, N., Kjærgaard, P., ... Pallé, P. L. (2015). The two-colour EMCCD instrument for the Danish 1.54 m telescope and SONG. Astronomy and Astrophysics, 574. https://doi.org/10.1051/0004-6361/201425260

The two-colour EMCCD instrument for the Danish 1.54 m telescope and SONG. / Skottfelt, J.; Bramich, D. M.; Hundertmark, M.; Jørgensen, U. G.; Michaelsen, N.; Kjærgaard, P.; Southworth, J.; Sørensen, A. N.; Andersen, M. F.; Andersen, M. I.; Christensen-Dalsgaard, J.; Frandsen, S.; Grundahl, F.; Harpsøe, K. B W; Kjeldsen, H.; Pallé, P. L.

In: Astronomy and Astrophysics, Vol. 574, 01.02.2015.

Research output: Contribution to journalArticle

Skottfelt, J, Bramich, DM, Hundertmark, M, Jørgensen, UG, Michaelsen, N, Kjærgaard, P, Southworth, J, Sørensen, AN, Andersen, MF, Andersen, MI, Christensen-Dalsgaard, J, Frandsen, S, Grundahl, F, Harpsøe, KBW, Kjeldsen, H & Pallé, PL 2015, 'The two-colour EMCCD instrument for the Danish 1.54 m telescope and SONG', Astronomy and Astrophysics, vol. 574. https://doi.org/10.1051/0004-6361/201425260
Skottfelt, J. ; Bramich, D. M. ; Hundertmark, M. ; Jørgensen, U. G. ; Michaelsen, N. ; Kjærgaard, P. ; Southworth, J. ; Sørensen, A. N. ; Andersen, M. F. ; Andersen, M. I. ; Christensen-Dalsgaard, J. ; Frandsen, S. ; Grundahl, F. ; Harpsøe, K. B W ; Kjeldsen, H. ; Pallé, P. L. / The two-colour EMCCD instrument for the Danish 1.54 m telescope and SONG. In: Astronomy and Astrophysics. 2015 ; Vol. 574.
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