13/06/2021
First Spectra of TCP J18573095+1653396 & Update
This is my first spectra take from recently (less than 12h hours a ago) discovered Nova in the region between Hercules and Aquilia.
I can even not judge if this spectra is resonable.
Fig1: Spectra of TCP J18573095+1653396
Update: meanwhile has some observer obtained spectra which looks similar. also some basic processing has been performed.
However in the next night I'll try to improve resolution a little more and try to take some deeper spectra in oder to see more details.
I like to say thank you to the "Astronomie Stiftung Trebur" which allow to use their ST10-XME which is a little more sensitive than my own ST8.
So stay tuned .. more to come.
And here is the update for the night of June13/24th, 2021
Fig2: Spectra of TCP J18573095+1653396 on June13th, 23:00 UT
Figure 2 shows how the situation changed trough 22h only. Emission features comes quite more visible compare to night before. This linear dispersion has been increase and spectral resolution to approx R=1200.
P-Cyg profile of H-Alpha is less visible. FWHM of H-a is about 112 Angstroem which corresponds to a doppler broaded velocity of about 2500km/s. H-Beta and H-Gamma have a slight blue absorption we can be read a the blue part of a P-Cyg profile. Termal velocities derived from H-Beta is about 5900km/s and H-Gamma about 3500km/s. The value for H-Beta is very uncertain because of the absorption feature on the red side of H-Beta. So it's difficult to get the right wavelength corresponding to the termal velocity at the red end.
It looks like that the spectra look overall more flat compare to last night. This might be driven due to the time the spectra last night has been obtained. At 01:00 UT dawn influences the background of the sky already.
I've to add that the correction driven by the wavelength depended sensitivity of the CCD has not yet been applied.
And the journey will continue...