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IVS OBSERVATION OF ICRF2-GAIA TRANSFER SOURCES

  • Authors: K. Le Bail, J. M. Gipson, D. Gordon, D. S. MacMillan, D. Behrend, C. C. Thomas, S. Bolotin, W. E. Himwich, K. D. Baver, B. E. Corey, M. Titus, G. Bourda, P. Charlot, and A. Collioud

2016 The Astronomical Journal 151 79.

  • Provider: AAS Journals

Caption: Figure 6.

Evolution of the observational coverage of the 195 ICRF2-Gaia transfer sources from 2011 January 1 to 2015 September 1. The color coding indicates the number of observations of a source over the previous year. For example, for cat. 3 on 2013 July 1, two sources had 1–3 observations, the others had none. The observation target is set to 12 per year.

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