Nova Sgr = PNV J18365700-2855420

Information about outbursts of eruptive stars, Be activity, ...
Christian Buil
Posts: 1431
Joined: Mon Sep 26, 2011 6:59 pm
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Christian Buil »

Near-IR spectrum of the nova (8.15/04/2015) taken with LISA IR spectrograph (R=950) and a 200 mm f/5 telescope:

Image

Image

(note Ca II triplet emission and more)

Christian
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Robin Leadbeater »

Josch Hambsch reports a big drop in Fe line intensity around 5200A from 6th to 8th April, (remote SA200 observation from Chile) coinciding with a rapid drop in brightness
http://www.aavso.org/bright-classical-nova-sagittarius
message "Spetrum from April 7/8 Posted: April 8, 2015 - 8:51pm"

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Christian Buil
Posts: 1431
Joined: Mon Sep 26, 2011 6:59 pm
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Christian Buil »

eShel spectrum (R=11000) taken the 12.17 April. Global spectrum:

Image

Detail around Halpha:

Image

and blue region:

Image

A close look of yellow Na lines with VHIRES MO spectrograph (R=50000) taken the same night (compare with 7 April observation):

Image

also:

Image

Image

Christian
Francois Teyssier
Posts: 1520
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Francois Teyssier »

Nice spectra Christian !
Interesting and complexe absorptions in Balmer and Fe II lines
François
Olivier GARDE
Posts: 1243
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Olivier GARDE »

Here's a spectrum of this nova taken last night at OHP during the annual star party meeting of our club : CALA
Image

Very bright but also very low in latitude...
LISA spectrograph with 35u slit on a C14 @ f/d7 and CCD ATIK 460EX
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Christian Buil
Posts: 1431
Joined: Mon Sep 26, 2011 6:59 pm
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Christian Buil »

Un nouveau spectre de la nova Sgr 2015 n°2 faite depuis Toulouse au même moment que toi j'ai l'impression Olivier G. (eShel + Newton 200). De la chance avec des nuits claires (maintenant c'est fini !) :

eShel spectrum taken the 14.141 April 2015:

Image

Image

Image

The aspect of nova spectrum taken with Alpy 600 spectrograph at R=650 (up), with eShel spectrograph at R=11000 (middle) and with VHIRES-MO spectrograph ar R=50000 (down) (6 and 7 April 2015, 200-mm Newtonian telescope):

Image

(note the difference of spectral range)

The same spectro, but for a detail (yellow Na sodium lines)

Image

(note the sharpness of insterstellar Na lines function of resolution and also, the blue shift of 520 km/s of nova enveloppe Na lines)

Christian
Olivier GARDE
Posts: 1243
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Olivier GARDE »

Evolution of the novae in 72H

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Christian Buil
Posts: 1431
Joined: Mon Sep 26, 2011 6:59 pm
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Christian Buil »

In complement to Olivier data, detail of Halpha line evolution (and continuum intensity) between 14 en 18 April (eShel, R = 11000):

Image
(the telluric lines are removed)

Condition of observations for the 18 April are note excellent - see
http://www.spectro-aras.com/forum/viewt ... 5130#p5130

Christian
Christian Buil
Posts: 1431
Joined: Mon Sep 26, 2011 6:59 pm
Contact:

Re: Nova Sgr = PNV J18365700-2855420

Post by Christian Buil »

HR spectrum (R=50000) of Halpha line the 24/04/2015 (note deep H2O telluric lines, the nova is at low elevation from France):

Image

Christian
Joan Guarro Flo
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

Re: Nova Sgr = PNV J18365700-2855420

Post by Joan Guarro Flo »

Hello:

The Nova Sgr #2 2015 in the last night.

Star of caparison, HD168646 A3III.

J.Guarro.
Attachments
_novasgr#22015_20150428_146_J. Guarro.png
_novasgr#22015_20150428_146_J. Guarro.png (8.03 KiB) Viewed 7733 times
Post Reply