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I agree, the Frederic's Alpy 600 can do more, surely. Among the causes, undersampling but it could also be due to a slight defocusing of spectrum on the focal plane.

Paolo

Nice spectrum Frederic! I think the lack of double-peaked h-alpha line is just a matter of resolving power. See the experiment below... The Ne-Ar lamp spectrum with Lhires III and 1200 l/mm grating http://quasar.teoth.it/html/spectra/lamp_20210118_733.png By attempts, I applied a gaussian filter to ...

Hi Etienne,

yes, binning 2x2. My camera is the SXVR-H694 model (Sony ICX694ALG sensor).

Paolo

I could try François, but the overall efficiency is low in those wavelengths. Weather forecast says next Tuesday could be the first useful night. I hope the nova brightness will not be decreased too much. Looking at a single 960 sec frame would have to make clear whether to continue or return to h-a...

Hi Christophe, only the 6364 A line is included in my previous spectra (yesterday I rotate the grating, now I have also 6300 line!). There is a lot of noise for the oxygen line but I think I see only a gradual intensity increase from January 13. You can try with my spectra on ARAS DB. I just sent th...

Very nice Christophe! The [O I] 6364 line is also included in my last spectra. On January 16th the emission line appears broad, with a prominent blue-shifted peak (very similar to [O I] 6300 line in your last spectrum). http://quasar.teoth.it/html/spectra/novaper2020_20210116_722_OI_PB.png The full ...

Hi all, I've just completed an H-alpha observation with Lhires III and 1200 l/mm grating. Very good sky transparency but strong atmospheric turbulence. http://quasar.teoth.it/html/spectra/novaper2020_20210113_774_PB.png Concurrent differential photometry shows a brightness declining trend with a mea...

Clouds came over... I stopped the observations. Two spectral range should be secured, I hope.



Paolo

Hi all, clear sky between two fronts in center of Italy. Good transparency and seeing, wind calm, temp 0.3° C, humidity 93%. A beautiful 95% phase Moon in Taurus... Nova brightness is still good, V mag is around 10.2 tonight (image Mak90 with V filter, 17:30 UT) http://quasar.teoth.it/html/varie/Nov...

Hello citizen scientists! :D My contribution for yesterday (13 Dec), NIR region using Lhires III and 600 l/mm grating. http://quasar.teoth.it/html/spectra/novaper2020_20201213_749_PB.png http://quasar.teoth.it/html/spectra/novaper2020_20201213_840_PB.png http://quasar.teoth.it/html/spectra/novaper20...