MOS observation of spiral galaxy NGC 4303

The very efficient multi-object-slit observing technique with the multi-mode instrument FORS1 is demonstrated on the Virgo cluster galaxy NGC 4303. Nineteen moveable slits at the instrument focal plane are positioned so that the faint light from several H II regions in this galaxy can pass into the spectrograph, while the much stronger "background" light (from the nearby areas in the galaxy and, to a large extent, from the Earth''s upper atmosphere) is blocked by the mask.

Crediti:

ESO

A proposito dell'immagine

Identificazione:eso0223b
Tipo:Osservazione
Data di pubblicazione:23 Agosto 2002
Notizie relative:eso0223
Dimensione:2076 x 2073 px

A proposito delll'oggetto

Nome:Messier 61, NGC 4303
Tipo:Local Universe : Nebula : Appearance : Emission : H II Region
Local Universe : Galaxy : Type : Spiral
Distanza:40 Milione Anni luce
Categoria:Galaxies

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Colori e filtri

BandaTelescopio
OtticoVery Large Telescope
FORS1