spectro-aras.com

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





(note Ca II triplet emission and more)

Christian

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

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



Detail around Halpha:



and blue region:



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



also:





Christian

Nice spectra Christian !
Interesting and complexe absorptions in Balmer and Fe II lines
François

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


Very bright but also very low in latitude...
LISA spectrograph with 35u slit on a C14 @ f/d7 and CCD ATIK 460EX

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:







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):



(note the difference of spectral range)

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



(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

Evolution of the novae in 72H

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


(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

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



Christian

Hello:

The Nova Sgr #2 2015 in the last night.

Star of caparison, HD168646 A3III.

J.Guarro.