TCP J04291884+4354232 possible nova mag 10.2

[umberto sollecchia]

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

[umberto sollecchia]

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

novaper2020_20201218_770_Umberto Sollecchia.png (39.39 KiB) Viewed 4800 times

u]Comparison[/u]

novaper2020_20201218_770_Comparazione -Umberto Sollecchia.png (52.57 KiB) Viewed 4800 times

[David Boyd]

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

Spectra days 1-21.png (193.45 KiB) Viewed 4760 times

[Rainer Ehlert]

Hi David,

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

Thank you.

[umberto sollecchia]

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

novaper2020_20201221_770_ Comparison -Umberto Sollecchia.png (103.77 KiB) Viewed 4726 times

[Christophe Boussin]

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) :

Nova Per 2020 on December 17th, 2020

_novaper2020_20201217_845_Christophe Boussin_3750_7540.png (80.38 KiB) Viewed 4700 times

The 18th of December at 23 h 04 TU (resolution of 521, JJ = 2459202.461 and an acquisition time of 70 min) :

Nova Per 2020 on December 18th, 2020

_novaper2020_20201218_961_Marion Thomas et Christophe Boussin_3750_7565.png (86.82 KiB) Viewed 4700 times

Nova Per 2020 on December 6th, 15th, 17th and 18th, 2020 (identification of some lines from PlotSpectra).

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...

Nova Per 2020 on December 6th, 15th, 17th and 18th, 2020 (zoom).

...and the relative intensity of the Halpha line continues to increase :

Nova Per 2020 on December 6th, 15th, 17th and 18th, 2020 (Halpha).

novaper2020_20201218_961_Marion Thomas et Christophe Boussin_Halpha.png (46.63 KiB) Viewed 4700 times

Clear skies,

Marion THOMAS et Christophe BOUSSIN

[James Foster]

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

[umberto sollecchia]

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

novaper2020_Comparison_Umberto Sollecchia.png (52.39 KiB) Viewed 4569 times

[Dubreuil Pierre]

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

NovaPer2020 le 16/16/2020

NovaPer2020 UVEX(4) 8185A to 8927A.png (111.68 KiB) Viewed 4534 times

Pierre
Aspremont 06 (fr)

[Robin Leadbeater]

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

novaper2020_20201228_742_Leadbeater.png (21.77 KiB) Viewed 4516 times

Robin