Optical spectroscopy of the 2021 outburst of recurrent nova M31N 2008-12a
ATel #15045; L. S. Sonith, Judhajeet Basu, G. C. Anupama, U. S. Kamath, Pramod Kumar, Mulchand Kurre, Sudhanshu Barway (Indian Institute of Astrophysics, Bengaluru, India
on 18 Nov 2021; 14:10 UT
Credential Certification: G.C. Anupama (gca@iiap.res.in)
We obtained optical spectra of the recurrent nova M31N 2008-12a during its ongoing outburst (ATel #15034, #15036, #15037, #15038, #15039 and #15040) on 2021-11-14 (JD 2459533.26) and 2020-11-15 (JD 2459534.17) covering a wavelength range of 380-800 nm, using the HFOSC instrument mounted on the 2-m Himalayan Chandra Telescope of the Indian Astronomical Observatory, Hanle. The spectrum obtained on 2020-11-15, shows Hydrogen Balmer lines with FWHM velocity of ~ 3000 km/s for H-alpha and ~ 2400 km/s for H-beta. Lines due to He I (4471, 5876, 6678, 7065) and N III (4638) are also present. The spectra are similar to those of the previous outbursts (e.g. Henze et al. 2018, ApJ, 857, 68; Darnley et al. 2016, ApJ, 833, 149).
We thank the HCT observers for sparing time to carry out the ToO observations. IAO is operated by the Indian Institute of Astrophysics, Bengaluru, India.
