Nova in Cassiopea (nova Cas 2020)

[Olivier GARDE]

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...

[Christophe Boussin]

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 :

Nova Cas 2020 on August 24th, 2020

_novacas2020_20200824_952_Christophe Boussin_3750_7565.png (91.71 KiB) Viewed 5611 times

Nova Cas 2020 on August 5th, 6th, 7th, 15th and 17th and 24th, 2020 (identification of lines from PlotSpectra)

Like the Balmer lines, the FeII lines are increasingly visible !

Evolution of the Halpha line :

Halpha line on August 5th, 6th, 7th, 15th, 17th and 24th, 2020

novacas2020_20200824_952_Christophe Boussin_Halpha.png (28.14 KiB) Viewed 5611 times

The relative intensity of the Halpha line is still increasing !

Evolution of the [OI] line :

[OI] line on August 5th, 6th, 7th, 15th, 17th and 24th, 2020

novacas2020_20200824_952_Christophe Boussin_OI.png (31.48 KiB) Viewed 5611 times

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

[etienne bertrand]

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...

[Olivier GARDE]

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

[Christophe Boussin]

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

[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 :

Nova Cas 2020 on August 25th, 2020

_novacas2020_20200825_999_Christophe Boussin_3750_7565.png (92.15 KiB) Viewed 5528 times

Nova Cas 2020 on August 5th, 6th, 7th, 15th, 17th, 24th and 25th, 2020 (identification of lines from PlotSpectra)

Evolution of the Halpha line :

Halpha line on August 5th, 6th, 7th, 15th, 17th, 24th and 25th, 2020

novacas2020_20200825_999_Christophe Boussin_Halpha.png (32.6 KiB) Viewed 5528 times

No significant changes in 24 hours, except for the Halpha line whose relative intensity seems to increase slightly ...

Clear skies !

Christophe BOUSSIN

[Vincent Lecocq]

hello,

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


clear skies,

vincent

[Christian Buil]

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.

[Christian Buil]

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

[etienne bertrand]

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