Echelle spectrum of SN1987A

This shows the raw image, as read from the CCD, with the recorded echelle spectrum of SN1987A. With this technique, the supernova spectrum is divided into many individual parts (spectral orders, each of which appears as a narrow horizontal line) that together cover the wavelength interval from 479 to 682 nm (from the bottom to the top), i.e. from blue to red light. Many bright emission lines from different elements are visible, e.g. the strong H-alpha line from hydrogen near the centre of the fourth order from the top. Emission lines from the terrestrial atmosphere are seen as vertical bright lines that cover the full width of the individual horizontal bands. Since this exposure was done with the nearly Full Moon above the horizon, an underlying, faint absorption-line spectrum of reflected sunlight is also visible. The exposure time was 30 min and the seeing conditions were excellent (0.5 arcsec).

Kilde:

ESO

Om bildet

ID:eso9944b
Type:Observasjon
Publiseringsdato:5. oktober 1999
Relaterte pressemeldinger:eso9944
Størrelse:4096 x 4208 px

Om objektet

Navn:SN 1987A, Spectrum
Type:Local Universe : Star : Evolutionary Stage : Supernova
Avstand:170000 lysår
Kategori:Stars

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BåndTeleskop
OptiskVery Large Telescope
UVES