Monitoring the photometric behavior of OmegaCAM with Astro-WISE
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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.
KeywordsImager 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 (www.rug.nl/target).
- 2.Begeman, K.G., Belikov, A.N., Boxhoorn, D.R., Valentijn, E.A.: The Astro-WISE datacentric information system. Exp. Astron. (2012). http://adsabs.harvard.edu/doi/10.1007/s10686-012-9311-4
- 4.de Jong, J.T.A., Verdoes Kleijn, G.A., Kuijken, K.H., Valentijn, E.A.: The kilo-degree survey. Exp. Astron. (2012). http://adsabs.harvard.edu/abs/2012arXiv1206.1254D
- 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.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
- 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
- 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.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.Verdoes Kleijn, G.A., Belikov, A.N., McFarland, J.P.: The data zoo in Astro-WISE. Exp. Astron. (2012). http://adsabs.harvard.edu/doi/10.1007/s10686-012-9314-1