[ Previous | Next | ADS ]

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