Spectroscopic classification of PNV J06245297+0208207 as a helium dwarf nova
ATel #15849; Hiroyuki Maehara (National Astronomical Observatory of Japan)
on 6 Jan 2023; 20:13 UT
Credential Certification: Hiroyuki Maehara (hiroyuki.maehara@nao.ac.jp)
Subjects: Optical, Cataclysmic Variable, Transient, Variables
I report the spectroscopic observation of PNV J06245297+0208207.
The object was discovered by Tomoo Kato (Shizuoka, Japan) at 11.7 mag on 2023-01-05.566. There is a 19.2 mag blue star in the Gaina DR3 Catalog at the object's position (Gaia DR3 3124112584945910912), which was identified as a white dwarf candidate (WDJ062452.92+020817.66) by Gentile Fusillo et al. (2019 and 2021).
I obtained a low-resolution spectrum of the object on 2023-01-6.70 using the fiber-fed integral field spectrograph (KOOLS-IFU; Matsubayashi et al. 2019) mounted on the 3.8 m Seimei telescope (Kurita et al. 2020) at the Okayama Observatory of Kyoto University. The spectrum shows a blue continuum with He I 4144, 4387, 4471, 4921, 5015, 5047, and 5876 absorption lines. In addition, no Balmer lines can be seen in the spectrum. These spectroscopic features suggest that the object is likely a helium dwarf nova in outburst.
Optical spectrum of PNV J06245297+0208207
