2D spectrum of Abell 78.
Spectrum of inner nebula.
Abell 78 planetary nebula spectrum
Abell 78 (PK 081.2-14.9)
is one of the rare planetary nebula (including Abell 30) know to contain inner
zones of nearly pure helium embedded into large (H, He) normal nebulosity. R.A.
(2000) : 21h35m51s, Dec. (2000) : +31°44'12".
Instrument : T60
(D
= 0.6 m) + LISA
spectrograph (click here for
technical informations) at R = 800 (VIS) + Atik 314L+ CCD camera
Observatory : Pic
du Midi
Observer
: Christian Buil & Valérie Desnoux
Exposure : 4 x 600 s
Download the central
star spectrum
here : _abell78_central_star_20110820_931.fit
Download the nebula spectrum
here : _abell78_nebula_20110820_931.fit
2D
spectrum of Abell 78.
Spectrum
of inner nebula.
Spectrum
of very high temperature and hydrogen-deficient central star (note absence of
Halpha line).