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.

Forrás:

ESO

About the Image

Id:eso0223b
Típus:Observation
Közzététel napja:2002. augusztus 23.
Related releases:eso0223
Size:2076 x 2073 px

About the Object

Név:Messier 61, NGC 4303
Típus:Local Universe : Nebula : Appearance : Emission : H II Region
Local Universe : Galaxy : Type : Spiral
Distance:40 million light years
Category:Galaxies

Képformátumok

Large JPEG
1,9 MB
Screensize JPEG
701,0 KB

Háttérképek

1024x768
630,7 KB
1280x1024
1004,0 KB
1600x1200
1,3 MB
1920x1200
1,5 MB
2048x1536
2,1 MB

Colours & filters

BandTelescope
OpticalVery Large Telescope
FORS1