Narrow-band imaging of M87 with the NTT.

Details Narrow-band imaging of M87 with the NTT. Narrow-band imaging of M87 with the NTT.

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989msngr..58...10j&link_type=abstract

The Messenger, vol. 58, p. 10-11

Physics

2

Peculiar Galaxies: Imaging

Scientific paper

Already during the current installation phase (August 1989), ESO's New Technology Telescope (NTT) presents an opportunity for useful science due to its large aperture and good tracking (no autoguider yet) on a site of excellent seeing. The greatest limitation is the lack of a field rotator which severely limits the maximum exposure times possible without obtaining unacceptably trailed images. Over most of the observable sky, this maximum exposure time is less than 5 minutes if one is to avoid more than 1 arcsecond of trailing one arcminute from the field centre.

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