another target in Cygnus constellation, very well visible at the moment! Here is a spectrum of Cygnus X1 microquasar taken with an Alpy 600 spectrograph and a very small 85mm refractor! Total exposure was almost 4h but dew on the 85mm objective during half of the exposure gives a true exposure closer to 2h...
- _cygnusx1_20130811_950_noted.png (4.08 KiB) Viewed 3270 times
Spectrum doesn't show a lot of lines as it is similar to a hot O-type star. Still, Hbeta is well visible but Halpha is not well visible, beeing filled by a broad emission.
Cordialement,
Olivier Thizy
Vous ne verrez plus des étoiles comme avant !
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