spectro-aras.com

Merci Joan, c'est parfait!
Un câlin fort.
Umberto

Bonsoir à tous, le profil de cette soirée 18/12/2020 et une comparaison avec la journée 16-12-2020 où une augmentation de l'OI-8446A est évidente. Un filtre rouge a été interposé.
Umberto Solllecchia
u]Comparison[/u]

Here are two composite plots of spectra of Nova Per 2020 taken by ARAS observers using LISA spectroscopes which show its evolution during the 3 weeks since discovery. All spectra have been normalised to unity at 5500A, log-scaled and equally displaced vertically.
David

Hi David,

Very interesting to see how it changed in the starting days and then more or less stabilized.

Thank you.

Bonsoir à tous. J'ai placé une comparaison séquentielle de mes observations dans l'IR
Umberto.

Hello all,

A few nights with a clear sky allowed us to obtain the following spectra of the Nova Per 2020 with an Alpy 600.

The 17th of December at 20 h 17 TU (resolution of 520, JJ = 2459201.3451 and an acquisition time of 30 min) : The 18th of December at 23 h 04 TU (resolution of 521, JJ = 2459202.461 and an acquisition time of 70 min) : The relative intensities of the FeII lines as well as that of the [OI] line at 6300 A seem to have increased slightly in a few days... ...and the relative intensity of the Halpha line continues to increase : Clear skies,

Marion THOMAS et Christophe BOUSSIN

Better late then never.....I've been taking Alpy600, LISA-IR, and LhiresIII data in Ha, Hb, & CaK.
First here is a stitched Alpy600+LISA-IR spectrum (Taken on the 4&5Dec20...I have more but wanted to do this pair first):

NOTE: All identified spectral lines are tenative.....I used a paper (Optical and near-infrared spectroscopy of nova V1494 Aquilae 1999 no. 2) to help identify the Ol lines in IR.

Here is an animation of the H-Alpha changes seen with my LhiresIII on 27Nov20, 11Dec20, 13Dec20, & 21Dec20:

NOTE: The 1st night (27Nov20) was slightly under-sampled, so I applied a low-pass gaussian filter. After this I increased my CCD cooling from -5 to -9 and increased
my sub-exposure duration from 2400 to 2700 seconds to get better SNR.

Here are two exposures in the H-Beta region with the LhiresIII (15Dec20 & 22Dec20):


Here is a single (set of 6 images, each 45min [2700sec] long) of the CaK region taken with the LhiresIII (16Dec20):


Hopefully this will stay above 11th magnitude for awhile longer....

James

Bonjour à tous, la nova va au repos. L'augmentation de l'intensité du CaII 8446A se poursuit.
Voici une comparaison entre le 21-12-2020 et le 27-12-2020.
Umberto Sollecchia

Bonjour Umberto

Super suivi de cette Nova.
Quelle est la configuration du materiel employé ?

Le 26/12 lors d'essais avec UVEX(4) j'ai choisi le champs autour du CA II.
La Nova etait une cible.
2 Pierre
Aspremont 06 (fr)

The OI 8446 line at R~7000 (LHIRES 1200)
Robin