Spectroscopic Classification of TCP J18022164-3310319 as a Classical Nova
ATel #17108; Yusuke Tampo (South African Astronomical Observatory, University of Cape Town)
on 25 Mar 2025; 01:00 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Yusuke Tampo (yusuke@saao.ac.za)
Subjects: Optical, Cataclysmic Variable, Nova, Transient, Variables
Referred to by ATel #: 17122
I report the spectroscopic classification of TCP J18022164-3310319. I obtained its optical spectrum on 2025-03-24.990 UT by the Mookodi (Erasmus et al. 2024) mounted on the 1-m Lesedi telescope at the South African Astronomical Observatory in Sutherland. The observation setups were 2" slit, wavelength coverage 4000-8000Å, and spectral resolution R~400.
As reported to CBAT by the NMW survey team, TCP J18022164-3310319 was originally discovered on 2025-03-24.0555 UT at 12.2 mag (unfiltered). There is no obvious counterpart in deep photometric surveys.
My normalized spectrum show the Balmer and He I lines with P Cygni profiles and He II 4686 emission as well.
The absorption minimum of this P Cygni profile in Hα is located at ~-700 km/s.
Combining these spectral features and its red color reported in CBAT, I conclude that TCP J18022164-3310319 is a classical nova.
My spectrum
