spectro-aras.com

04:55:03.766 -65:55:57.18
https://www.wis-tns.org/object/2024epj

Robin

Here's the spectrum taken last night from our 2SPOT eshel spectrograph from Chile.




Very noisy at magnitude around V=10 and too low for an echelle spectrograph and a RC 12'.



the two narrow emission line at 5577,35 Å and 6300 Å are [O I] atmospherics lines (not substract from the echelle spectrum)

And the full graph with a filter



It seems to us that this is a novae, with an expansion velocity of the ejecta on the hydrogen lines about 4000km/s.

And this is what I've managed with an Alpy. I suspect it's a little fainter than the 10th magnitude it has been estimated at. Similar result of about +/- 4200 km/s for the expanding shell.

Great Tom !!!

We will try next night with our Alpy 600....

Tom Love wrote: Wed Mar 20, 2024 12:36 pm And this is what I've managed with an Alpy. I suspect it's a little fainter than the 10th magnitude it has been estimated at. Similar result of about +/- 4200 km/s for the expanding shell.

Yes the latest report on TNS suggests it is fading rapidly

2024-03-18 18:34:24.000 11.56 (sloan g)

Robin

Good result despite the low luminosity

Very fast nova.
Expansion velocity 4900-5100 km/s measured on H alpha and H beta.

Page opened: https://aras-database.github.io/database/at2024epj.html

ATEL :
https://www.astronomerstelegram.org/?read=16545


and classification on TNS :
https://www.wis-tns.org/object/2024epj

And an updated observation. This is a long (3 hour) exposure which shows a little more detail, though it's a bit noisy as we approach the near infrared. FITS files uploaded to the ARAS database as usual.


H Alpha in velocity:

Nice result Tom !!!
And this is the confirmation of our previous spectrum.

We wil try again next night with our Alpy 600 at 2SPOT in Chile....

Thanks Olivier. My weather forecast is terrible for the next week, so I think it's over to you for now!