V1369 Cen

[Ken Harrison]

Finally managed to get an hour of clear weather.
Using the Spectra-L200, 300 l/mm grating for approx. R=1000, Genesis 4" f5

The region around Hb continues to show strong Fe emissions.

novaCen201213_02.bass.png (37.05 KiB) Viewed 24821 times

Still processing the Ha - it appears to have reduced in intensity.

[Francois Teyssier]

Good spectrum, Ken. Could you send the fit file for Aras Data Base ?
The spectral development is very similar to Nova Del.
As I said in AAVSO forum, at this stage, there's no [O III] line ; they will appear at the beging of the nebular stage.
[OIII] lines are 4363, 4959 and 5007
All the best
François

[Ken Harrison]

Hmmm
Now working at R=4040....
Could have done with more exposure time....
The Hb region is the first processed...showing the now "standard P-Cyg" in both the Hb and Fe lines.
I've run a velocity graph based on the Hb (4861A) showing the larger absorption is still around the 1600Km/s
Feedback/ comments welcome.
(Francois - I sent a fits file to you...did you receive?)

novaCen_Hb_080114.png (39.66 KiB) Viewed 24753 times

novaCen_Hb_Vel_080114.png (30.21 KiB) Viewed 24753 times

[Ken Harrison]

Some results from last night.
I'll upload the fits later.
The P-Cyg profiles seem to have diminished.

novaCen_Ha_270114.png (29.91 KiB) Viewed 24706 times

novaCen_Hb_270114.png (40.36 KiB) Viewed 24706 times

novaCen_Hb_[0III]_270114.png (41.54 KiB) Viewed 24706 times

novaCen_Hgamma_270114.png (42.28 KiB) Viewed 24706 times

NovaCen_Hgamma_below_270114.png (41.58 KiB) Viewed 24706 times

[Ken Harrison]

Very hot weather for the past few days (over 32 deg overnight!) stopped the observing sessions.
A bit cooler last night (28 deg)
The attached spectra show the absorption features beginning to show in the Fe and Ha. P-Cyg profiles certainly reducing.

novaCen_Hb_050214.png (47.22 KiB) Viewed 24681 times

novaCen_Ha_050214.png (31.4 KiB) Viewed 24681 times

[Ken Harrison]

The observing conditions in Victoria, Australia have been very poor due to the horror bushfires and thick smoke haze we've been having.
Thankfully the loss of life has been minimal.

The attached spectra were obtained on the 10th Feb and show the current situation for the nova. The Ha emission is very strong.

just look at the ADU values!

NovaCen_Ha_100214.png (27.39 KiB) Viewed 24656 times

some P-Cyg ?

novaCen_Hb_100214.png (33.84 KiB) Viewed 24656 times

still shows atmospheric absorption in the Na line?

novaCen_Na_100214.png (36.1 KiB) Viewed 24656 times

[Ken Harrison]

Latest V1369 Cen spectra.
The profiles of the Ha and [NII] have significantly changed from the 10th Feb.......

NovaCen_Hb_230214.png (40.38 KiB) Viewed 24632 times

novaCen_[NII]_230214.png (43.48 KiB) Viewed 24632 times

NovaCen_Ha_230214.png (30.31 KiB) Viewed 24632 times

novaCen_Ha_Vel_230214.png (32.36 KiB) Viewed 24632 times

[Ken Harrison]

Some V1369 data from the 5th April.
Significant changes around Hb, the Fe "curtain" seems to have gone and the nebula phase starting?

NII/[OIII] now more intense than Hb - Fe disappears

NovaCen_Hb_050414.png (43.08 KiB) Viewed 24526 times

Region around Na/NII

NovaCen_NII..png (70.3 KiB) Viewed 24526 times

similar Ha profiles and intensity

NovaCen_Ha_050414.png (29.1 KiB) Viewed 24526 times

[Ken Harrison]

Results from last night show the persistent Ha absorptions and the steady increase of the Ha emission.

Ha from 5th to 15th April

novacenHa050414 to 150414.png (42.37 KiB) Viewed 24497 times

[Ken Harrison]

Here's the Hb Region from the 15th.

Hmmmm

I think the [OIII] at 4959 and 5007 are beginning to develop.

The others could be NII (5001), NIII (4638) and HeII (4686)

Growth of the [OIII]??

novacenHb150414.png (44.16 KiB) Viewed 24478 times

Every spectrum seems to show more and more features......