Experimental Astronomy

, Volume 35, Issue 1–2, pp 103–130 | Cite as

Monitoring the photometric behavior of OmegaCAM with Astro-WISE

  • G. A. Verdoes KleijnEmail author
  • K. H. Kuijken
  • E. A. Valentijn
  • D. R. Boxhoorn
  • K. G. Begeman
  • E. R. Deul
  • E. M. Helmich
  • R. Rengelink
Original Article


The OmegaCAM wide-field optical imager is the sole instrument on the VLT Survey Telescope at ESO’s Paranal Observatory. The instrument, as well as the telescope, have been designed for surveys with very good, natural seeing-limited image quality over a 1 square degree field. OmegaCAM was commissioned in 2011 and has been observing three ESO Public Surveys in parallel since October 15, 2011. We use the Astro-WISE information system to monitor the calibration of the observatory and to produce the Kilo Degree Survey (KiDS). Here we describe the photometric monitoring procedures in Astro-WISE and give a first impression of OmegaCAM’s photometric behavior as a function of time. The long-term monitoring of the observatory goes hand in hand with the KiDS survey production in Astro-WISE. KiDS is observed under partially non-photometric conditions. Based on the first year of OmegaCAM operations it is expected that a ∼ 1–2 % photometric homogeneity will be achieved for KiDS.


Imager Wide-field system Survey system VLT/VST Astro-WISE Information system OmegaCAM 



The OmegaCAM consortium was formed in response to an announcement of opportunity from ESO, and comprises institutes in the Netherlands (NOVA, in particular the Kapteyn Institute Groningen and Leiden Observatory), Germany (in particular University Observatories of Munich, Gottingen and Bonn) and Italy (INAF, in particular Padua and Naples observatories). The ESO Optical Detector Team designed and built the detector system. OmegaCAM is headed by PI K. Kuijken (Leiden University). We acknowledge the good support by ESO staff during OmegaCAM commissioning, with special thanks to Steffen Mieske and Dietrich Baade. OmegaCAM is funded by grants from the Dutch Organization for Research in Astronomy (NOVA), the German Federal Ministry of Education, Science, Research and Technology (grants 05 AV9MG1/7, AV9WM2/5, 05 AV2MGA/6 and 05 AV2WM1/2), and the Italian Consorzio Nazionale per l’Astronomia e l’Astrofisica (CNAA) and Istituto Nazionale di Astrofisica (INAF), in addition to manpower and materials provided by the partner institutes. OmegaCAM dataflow operations in The Netherlands are supported by Target (


  1. 1.
    Arnaboldi, M., et al.: ESO public surveys with the VST and VISTA. Messenger 127, 28 (2007)ADSGoogle Scholar
  2. 2.
    Begeman, K.G., Belikov, A.N., Boxhoorn, D.R., Valentijn, E.A.: The Astro-WISE datacentric information system. Exp. Astron. (2012).
  3. 3.
    Capaccioli,M., Schipani, P.: The VLT survey telescope opens to the sky: history of a commissioning. Messenger 146, 2 (2011)ADSGoogle Scholar
  4. 4.
    de Jong, J.T.A., Verdoes Kleijn, G.A., Kuijken, K.H., Valentijn, E.A.: The kilo-degree survey. Exp. Astron. (2012).
  5. 5.
    Emerson, J.P., Sutherland, W.J. VISTA: status and performance. In: Proc. of SPIE, SPIE Conf. Ser., vol. 7733, 4E (2010)Google Scholar
  6. 6.
    Filippi, G., Jaque, S., Liello, F., Chini, R. EVALSO: a high-bandwidth communication infrastructure to efficiently connect the ESO Paranal and the Cerro Armazones observatories to Europe. In: Proc. of SPIE , SPIE Conf. Ser., vol. 7740, 49F (2010)Google Scholar
  7. 7.
    Koch, A., Odenkirchen, M., Grebel, E.K., Caldwell, J.A.R.: A calibration map for wide field imager photometry. Astron. Nachr. 325, 299 (2004)ADSCrossRefGoogle Scholar
  8. 8.
    Kuijken, K.: OmegaCAM: ESO’s newest imager. Messenger 146, 8 (2011)ADSGoogle Scholar
  9. 9.
    Landolt, A.U.: UBVRI photometric standard stars in the magnitude range 11.5–16.0 around the celestial equator. Astron. J. 104, 340 (1992)ADSCrossRefGoogle Scholar
  10. 10.
    Manfroid, J., Selman, F., Jones, H.: Achieving 1 % photometric accuracy with the ESO wide field imager. Messenger 104, 16 (2001)ADSGoogle Scholar
  11. 11.
    Patat, F., et al.: Optical atmospheric extinction over Cerro Paranal. A & A 527, A91 (2011)ADSCrossRefGoogle Scholar
  12. 12.
    Regnault, N.: Photometric calibration of the supernova legacy survey fields. In: Sterken, C. (ed.) The Future of Photometric, Spectrophotometric and Polarimetric Standardization. Astron. Soc. Pac. Conf. Ser., Vol. 364, p. 587 (2007)Google Scholar
  13. 13.
    Stetson, P.B.: Homogeneous photometry for star clusters and resolved galaxies. II. Photometric standard stars. Publ. Astron. Soc. Pac. 112, 925 (2000)ADSCrossRefGoogle Scholar
  14. 14.
    Valentijn, E.A., et al.: Astro-WISE: chaining to the universe. In: Shaw, R.A., Hill, F., Bell, D.-J. (eds.) Proc. of ADASS XVI. Astron. Soc. Pac. Conf. Ser., Vol. 376, p. 491 (2007)Google Scholar
  15. 15.
    Verdoes Kleijn, G., Vermeij, R., Valentijn, E., Kuijken, K.: The secondary standards programme for OmegaCAM. In: Sterken, C. (ed.) The Future of Photometric, Spectrophotometric and Polarimetric Standardization. Astron. Soc. Pac. Conf. Ser., Vol. 364, p. 103 (2007)Google Scholar
  16. 16.
    Verdoes Kleijn, G.A., Belikov, A.N., McFarland, J.P.: The data zoo in Astro-WISE. Exp. Astron. (2012).

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • G. A. Verdoes Kleijn
    • 1
    Email author
  • K. H. Kuijken
    • 2
  • E. A. Valentijn
    • 1
  • D. R. Boxhoorn
    • 1
  • K. G. Begeman
    • 1
  • E. R. Deul
    • 2
  • E. M. Helmich
    • 1
  • R. Rengelink
    • 1
  1. 1.Kapteyn Astronomical InstituteUniversity of GroningenGroningenThe Netherlands
  2. 2.Leiden ObservatoryLeiden UniversityLeidenThe Netherlands

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