Optical spectrum of SN 2022blm with the Himalayan Chandra Telescope
ATel #15216; Anirban Dutta, G. C. Anupama, D. K. Sahu, Pramod Kumar, Indian Institute of Astrophysics, Bengaluru, India
on 9 Feb 2022; 15:54 UT
Credential Certification: G.C. Anupama (gca@iiap.res.in)
Subjects: Optical, Supernovae
A spectrum of SN 2022blm (Zheng & Filippenko, TNS Astronomical Transient Report No. 135676) was obtained on 2022 February 07, 10:15:17 UT (JD 2459619.9) covering a wavelength range of 360 - 800 nm, using the HFOSC instrument on the 2-m Himalayan Chandra Telescope of the Indian Astronomical Observatory, Hanle. The spectrum shows a highly reddened continuum, with prominent features due to Si II 635.5 nm, S II and Fe III. The Si II line profile is asymmetric with a velocity of ~10,300 km/s. The spectrum is similar to that of a heavily reddened normal type Ia supernova around maximum. The Na ID absorption line at the redshift of the host galaxy (z~0.009) is strong indicating high host galaxy extinction. The line-of-sight Galactic extinction is also high.
We thank the staff at IAO and CREST, Hosakote, for helping with the observations. The Indian Astronomical Observatory and CREST are operated by the Indian Institute of Astrophysics, Bengaluru, India.
