V1369 Cen

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Ken Harrison
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V1369 Cen

Post by 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
novaCen201213_02.bass.png (37.05 KiB) Viewed 16712 times

Still processing the Ha - it appears to have reduced in intensity.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
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Francois Teyssier
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Re: V1369 Cen

Post by 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
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Re: V1369 Cen

Post by 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
novaCen_Hb_080114.png (39.66 KiB) Viewed 16644 times
novaCen_Hb_Vel_080114.png
novaCen_Hb_Vel_080114.png (30.21 KiB) Viewed 16644 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
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Ken Harrison
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Re: V1369 Cen

Post by 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
novaCen_Ha_270114.png (29.91 KiB) Viewed 16597 times
novaCen_Hb_270114.png
novaCen_Hb_270114.png (40.36 KiB) Viewed 16597 times
novaCen_Hb_[0III]_270114.png
novaCen_Hb_[0III]_270114.png (41.54 KiB) Viewed 16597 times
novaCen_Hgamma_270114.png
novaCen_Hgamma_270114.png (42.28 KiB) Viewed 16597 times
NovaCen_Hgamma_below_270114.png
NovaCen_Hgamma_below_270114.png (41.58 KiB) Viewed 16597 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
Ken Harrison
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Re: V1369 Cen

Post by 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
novaCen_Hb_050214.png (47.22 KiB) Viewed 16572 times
novaCen_Ha_050214.png
novaCen_Ha_050214.png (31.4 KiB) Viewed 16572 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
Ken Harrison
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Re: V1369 Cen

Post by 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!
just look at the ADU values!
NovaCen_Ha_100214.png (27.39 KiB) Viewed 16547 times
some P-Cyg ?
some P-Cyg ?
novaCen_Hb_100214.png (33.84 KiB) Viewed 16547 times
still shows atmospheric absorption in the Na line?
still shows atmospheric absorption in the Na line?
novaCen_Na_100214.png (36.1 KiB) Viewed 16547 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
Ken Harrison
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Re: V1369 Cen

Post by Ken Harrison »

Latest V1369 Cen spectra.
The profiles of the Ha and [NII] have significantly changed from the 10th Feb.......
NovaCen_Hb_230214.png
NovaCen_Hb_230214.png (40.38 KiB) Viewed 16523 times
novaCen_[NII]_230214.png
novaCen_[NII]_230214.png (43.48 KiB) Viewed 16523 times
NovaCen_Ha_230214.png
NovaCen_Ha_230214.png (30.31 KiB) Viewed 16523 times
novaCen_Ha_Vel_230214.png
novaCen_Ha_Vel_230214.png (32.36 KiB) Viewed 16523 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
Ken Harrison
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Re: V1369 Cen

Post by 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
NII/[OIII] now more intense than Hb - Fe disappears
NovaCen_Hb_050414.png (43.08 KiB) Viewed 16417 times
Region around Na/NII
Region around Na/NII
NovaCen_NII..png (70.3 KiB) Viewed 16417 times
similar Ha profiles and intensity
similar Ha profiles and intensity
NovaCen_Ha_050414.png (29.1 KiB) Viewed 16417 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
Ken Harrison
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Re: V1369 Cen

Post by 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
Ha from 5th to 15th April
novacenHa050414 to 150414.png (42.37 KiB) Viewed 16388 times
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
Ken Harrison
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Re: V1369 Cen

Post by 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]??
Growth of the [OIII]??
novacenHb150414.png (44.16 KiB) Viewed 16369 times


Every spectrum seems to show more and more features......
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
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