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Published online by Cambridge University Press: 04 August 2017
The nebular and stellar observations were carried out by G. T. at the Cassegrain focus of the Danish 1.50m telescope at the ESO La Silla Observatory in August and September 1984, using a RCA CCD (512 × 320 pixels) with a pixel size of 0.47”. The frames were reduced using the VAX/MIDAS software at ESO Garching and Meudon Observatory (INVENTORY automatic program).