Spectroscopic classification of TCP J17140253-2849233 as a Galactic nova
ATel #11398; S. C. Williams (Lancaster), M. J. Darnley (LJMU), M. W. Healy (LJMU)
on 11 Mar 2018; 11:02 UT
Credential Certification: Steven Williams (scw@astro.ljmu.ac.uk)
Subjects: Optical, Nova, Transient
Referred to by ATel #: 11409
We obtained a spectrum of TCP J17140253-2849233 (see CBAT TOCP, also designated PNV J17140261-2849237) using the FRODOSpec spectrograph (Barnsley et al. 2012) on the 2-m Liverpool Telescope (Steele et al. 2004), with a wavelength coverage of 3900 to 5100 Å and 5900 to 8000 Å and resolution of R ~ 5400.
The spectrum shows strong Balmer lines which exhibit P-Cygni profiles, with the edge of the Hα absorption component indicating a maximum velocity of -1200 km/s. O I 7773 Å is also seen with a P-Cygni profile. We identify several Fe II lines, including those at 4584, 4924, 5018, 6148, 6248 and 6456 Å. N I (7468, 7442, 7424 Å) is seen mainly in absorption, with two clear components, a lower velocity one with a minimum at -400 km/s and one at -700 km/s. The Si II 6347 and 6371 Å lines, along with Mg II (4481 Å), show a similar structure, as do a number of the Fe II lines.
This spectrum shows TCP J17140253-2849233 is a Galactic nova (Fe II type) in the early stages of an eruption.
