Spectroscopic Confirmation and some Photometry of Nova Sgr 2015 = PNV J18142514-2554343
ATel #7101; Frederick Walter (Stony Brook University)
on 18 Feb 2015; 16:01 UT
Credential Certification: Fred Walter (frederick.walter@stonybrook.edu)
Subjects: Infra-Red, Optical, Nova
An observation with the Chiron Echelle Spectrograph on the SMARTS/CTIO 1.5m,
together with SMARTS 1.3m Andicam BVRIJHK photometry indicate
that this object is a classical Fe II nova near maximum.
Photometry on the nights of 2015 February 13-17 shows that the brightness
peaked in B (10.4) and V (9.7) between MJD 57069 and 57070,
in R (9.0) and I (8.8) about MJD 57071.0, and continues
to increase through MJD 57071.9 at JHK.
The R=28000 spectrum, obtained 2015 February 16 at 09:40UT,
shows narrow P Cyg lines of
Fe II, N I, N II, O I, and H-alpha and H-beta. Assuming negligible
intrinsic radial velocity, the peak absorption opacity is about -100 km/s,
with maximum wind velocities near -500 km/s.
At this time (pre-maximum), the H-alpha emission equivalent width was
-0.7nm, with a FWHM of 300 km/s.
Some plots are available on SMARTS nova atlas web page (link below).
Stony Brook/Smarts Atlas of (mostly) Southern Novae
