PNV J17335943-3606216

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PNV J17335943-3606216

Postby Terry Bohlsen » Tue Jun 04, 2013 1:38 pm

Dear All
I took a spectra of this PNV tonight (4th June)and it cetainly looks like a nova. It has a mag of V=13.5 but brighter in R and I
It has an intense Ha emission with a FWHM of 1830 km/s This is wider than Christians measurement from yesterday.
There is evidence of Fe emission as well.
Cheers

Terry Bohlsen
Image
Terry Bohlsen
Armidale NSW
Australia
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Re: PNV J17335943-3606216

Postby Christian Buil » Wed Jun 05, 2013 1:04 am

Very good spectrum from your productive observatory Terry !

By comparison my version of PNV J17335943-3606216 taken the
June 3.960, 2003 with Alpy 600 spectrograph (R=600).
The object is at very low elevation from France (delta = -36° !) :(
and the telescope used is small (200 mm).
I observe 1400 km/s but I have corrected by some instrumental
windening effect (finite resolution of the spectrograph).

Image

It is clear Halpha intensity increase.

Try to continue to observe this object, ideal for you Terry.

Christian B
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Re: PNV J17335943-3606216

Postby Francois Teyssier » Wed Jun 05, 2013 5:26 pm

Hello Terry,

Very nice spectrum (as usual !)
Have you identified the two lines between 6000 and 6500 angströms ?

Best regards

François
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Re: PNV J17335943-3606216

Postby Terry Bohlsen » Thu Jun 06, 2013 12:16 pm

Francois Teyssier wrote:Hello Terry,

Very nice spectrum (as usual !)
Have you identified the two lines between 6000 and 6500 angströms ?

Best regards

François

Thanks Francois
The 2 lines are 6158.2 O I and 6247.6 Fe II
There are also low SN lines at 5234.6 Fe II and 5276.0 Fe II.
The SN is not high enough at those frequencies to be certain. Unfortunately I currently have cloud and this is forecast to continue for a few more days so I can't do any follow up images.

Cheers
Terry
Image
Terry Bohlsen
Armidale NSW
Australia
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Posts: 98
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Re: PNV J17335943-3606216

Postby Francois Teyssier » Sat Jun 08, 2013 6:00 am

Hi Terry,

I'm skeptical.

O I 6158.2 doesn't appear in the published lists of lines in novae.
The common lines OI are in IR, noticelly, 8446 and 7773

Here's an almost complete list of lines for novae from Williams, 2012 : http://www.astronomie-amateur.fr/Documents%20Novae/Raies_Novae.pdf

When an Iron line from a multiplet appears, you must have the others lines of the multiplet.
So you can try to find the 3 lines of the multiplet Fe II (74) : 6148, 6417, 6456

The spectrum of this very red and inusual nova is difficult interpreting
Perhaps you could raise the question to Jennifer on AAVSO forum ?

All the best,

François
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Re: PNV J17335943-3606216

Postby Terry Bohlsen » Sat Jun 08, 2013 8:17 am

Dear Francois
You have much more knowledge on this than I do. I just measured the position and matched the measurement with the list of FeII lines towards the botton of your site http://www.astronomie-amateur.fr/Projet ... Novae.html
The O I line is on the list.
It might be clear enough to take a follow up spectra tonight so I will try.
Cheers

Terry
Terry Bohlsen
Armidale NSW
Australia
Terry Bohlsen
 
Posts: 98
Joined: Thu Sep 29, 2011 7:40 am

Re: PNV J17335943-3606216

Postby Francois Teyssier » Sat Jun 08, 2013 10:46 am

You're right Terry !
So Williams' list should not be as complete as he claims ...
A suivre ...
François
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Re: PNV J17335943-3606216

Postby Terry Bohlsen » Mon Jun 10, 2013 6:02 am

Follow up spectra from last night. The magnitude has fallen from V= 13.50 I= 9.83 on 4/6/13 to
9/6/13 V= 14.70 I= 10.72

The spectra now has a much stronger Ha line and the Fe lines are now much more obvious.
Cheers
Terry
Image
Image
Terry Bohlsen
Armidale NSW
Australia
Terry Bohlsen
 
Posts: 98
Joined: Thu Sep 29, 2011 7:40 am

Re: PNV J17335943-3606216

Postby Francois Teyssier » Mon Jun 10, 2013 7:00 am

Excellent Terry at such a magnitude.
I think you'll find easily the FeII (74) lines in this spectrum.
Could you send me your fit for an update of the aras page ?
Cheers
François
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Re: PNV J17335943-3606216

Postby Christian Buil » Thu Jun 13, 2013 6:46 pm

From last night an observation of nova Scorpii from Toulouse. The object is now faint,
but Halpha intensity increase :

Image

This Alpy 600 reveal the near infrared part of the spectrum. Here a comprarison of my 4 and 13 June observations:

Image

The OI lines are now very intenses (at 7773 A and 8446 A). Also the infrared CaII near 8550 A.
The Hbeta line is also faintly visible.

Note the orientation of the 200-mm telescope from France during nova observation :?

Image

See also the page (you can download spectra):

http://www.astrosurf.com/buil/nova_sco2013/obs.htm

Christian
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