Observed Spectral profile of NGC6826


Date & Time: Sep 28 2013, from 22:28 to 22:35 JST(+0900)
Composed 2 shots with 2 minutes exposed
Optical: TAKAHASHI 12.5cm(4.9") fluorite refractor, stopped D=100mm (f=1000mm, F10.0)
with SBIG DSS7 Spectrometer
Auto-guided with VIXEN ATLUX Equatorial
Cooled CCD Camera: SBIG ST-402ME (Temp.: -10°C)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Upper strip: taken spectrogram, Lower strip: stretched 3-pixel-width & pseudo-colored image


This page shows a spectrogram of the NGC6826 (Blinking nebula) and an intensity profile provided from it. The profile shows three emission lines from the Balmer series, from H-alpha to H-gamma, of hydrogen atoms. And you can recognize that the nebula includes extraordinary strong two emission lines from the ionized oxygen atoms of O III relative to those from the Balmer series. The normal optical images of the nebula show greenish color, which is consistent with the spectrogram that hardly includes H-alpha composition in red light.


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