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etienne bertrand wrote:merci pour les photos , c'est impressionnant ces télescopes !
Belle ambiance.

Etienne,

Le RC12 c'est celui qui va partir au Chili pour notre setup 2SPOT en remote...

Hello all,

Christian, Peter, Olivier and Stéphane, happy to see your results and the evolution of the nova since my last spectrum !!
What a pleasure to see these pictures of the OHP ... look forward to next year with many more spectros !!
With a less favorable weather than at OHP, I think, I have, I obtained the following spectrum of the nova Cas 2020 the 24th of August at 22 h 51 TU with my Alpy 600 (resolution of 501, JJ = 2459086.4521) and an acquisition time of 85 min :
Like the Balmer lines, the FeII lines are increasingly visible !

Evolution of the Halpha line : The relative intensity of the Halpha line is still increasing !

Evolution of the [OI] line : But that of [OI] at 6300A seems to have changed little ...

Clear skies to all for the next steps of the evolution of the nova !

Christophe BOUSSIN

Ok Olivier, c'est un bon bestiau ce 12"
Vous allez mettre un Alpy600 dessus ou un UVEX ? Peut être l'Alpy est plus stable dans le temps ?
C'est prévu pour quand est ce ?
Peut être une lunette en parallèle pour l'imagerie ou des transits d'exoplanètes ? Y'a de quoi s'amuser...

etienne bertrand wrote:Ok Olivier, c'est un bon bestiau ce 12"
Vous allez mettre un Alpy600 dessus ou un UVEX ? Peut être l'Alpy est plus stable dans le temps ?
C'est prévu pour quand est ce ?
Peut être une lunette en parallèle pour l'imagerie ou des transits d'exoplanètes ? Y'a de quoi s'amuser...

Ce sera un ALPY dans un premier temps mais clairement on aura un UVEX dans le futur

Hello all,

For information, a recent telegram about the emission of carbon monoxide in Nova Cas 2020 :

http://www.astronomerstelegram.org/?read=13967

Christophe BOUSSIN

Hello all,

Here is my new update for the nova Cas 2020 with the following spectrum obtained last night the 25th of August at 23 h 58 TU with my Alpy 600 (resolution of 507, JJ = 2459087.4985) and an acquisition time of 60 min :
Evolution of the Halpha line : No significant changes in 24 hours, except for the Halpha line whose relative intensity seems to increase slightly ...

Clear skies !

Christophe BOUSSIN

hello,

a "new" spectrum of nova cas 2020, taken during the 23-24/08 night:


clear skies,

vincent

Part of an eShel spectrograph spectrogram(T250 mm telescope - eShel(2) R=12000 - ASI6200MM camera, the 24.9 August:



The same for the 27.9 August:



Christian B.

Simultaneous observation of nova Cas 2020 by using two very different setup, an unusual experience for me :



At the first plane a Celestron 9.25 + UVEX spectrograph (industrial prototype version of UVEX from Shelyak Inst). At the second plane the Newton 250 and fiber eShel interface.

The control panels for UVEX(S), the nova is on the cross and the 23 microns slit :



and for eShel, the nova is on the 50 microns hole :



The eShel resolution is degraded to the UVEX spectrograph actual configuration (600 grooves/mm grating, blaze 750 nm), from R=12000 to R=2200 by successive gaussian filters and binning on ISIS, and the two spectra are merged :





The result is a peculiar amateur spectrum from 0.385 micron to 1 micron. The atmospheric H2O absorpion is severe at 9500 A.

Detail of the common wavelength region between the two part (eShel for the bleu, UVEX for near-IR). Note the excellent coherence (I use L_MERGE command for the fusion) :



A detail of near-IR :



Christian Buil

Bravo Christian pour ce reporting,
Il y a pleins de photos, de spectres, de spectros c'est super !!