spectro-aras.com

An update (click to enlarge):

Impressive Paul.
I only have 2 spectra taken due to crappy weather.
Terry

Hi Terry,

Nice work. Like you, I also managed some simultaneous photometry last night. I used my transformed V-band image in ISIS to create a flux calibrated version similar to yours. I think it serves to provide a useful comparison.

Cheers,

Paul

database updated
http://www.astrosurf.com/aras/Aras_Data ... en2017.htm
A nice series!

François

Corrected (thanks, Paul!)

Steve Shore (University of Pisa) requests spectroscopic observation of Nova Oph 2017
Steve Shore wrote: Oph 2017 is now starting to form dust (see: http://www.astronomerstelegram.org/?read=10492), it’s essential that high resolution observations be obtained now and continuing for at least the next month with a cadence of about 1 or two days

Spectra should be obtained at a resolution of at least R = 5000

H alpha would certainly be enough for the basic observation. It doesn’t even require that high a S/N, just the change in the symmetry of the line will suffice. Yes, the brightness will drop considerably, that’s why now is so important.


Low resolution spectra are also usefull if flux calibrated

Nova Oph 2017 is currently at mag V = 15 and R = 13.5

So I think impossible at that resolution with amateur scopes

Aside from oscillating hydrogen emission lines, there's still little change noted in ASASSN-17gk (Nova Cen).

Paul

Hi Paul,

Great serial spectra...

An update on ASASSN-17gk.

Starting to get low in the south west, but as it enters the nebula phase, some interesting features (N II) changing over the course of 24 hours (resolvable even with the Alpy).

Paul