Spectroscopic classification of SN 2022gnp by NUTS2 (NOT Un-biased Transient Survey-2)
ATel #15320; S. C. Williams, E. Kankare, S. Mattila, K. Matilainen (UTU), T. M. Reynolds (DAWN, Copenhagen), on behalf of the NUTS2 collaboration.
on 10 Apr 2022; 18:07 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Steven Williams (steven.williams@utu.fi)
Subjects: Optical, Supernovae, Transient
The NUTS2 collaboration (Holmbo et al. 2019; ATel #12661) reports the spectroscopic classification of SN 2022gnp (ZTF22aadoihx) in Arp 299 at z = 0.0104 (NED). The candidate was discovered by ZTF.
The observation was performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC on 2022-04-10.14 UT (range 340-980 nm; resolution 1.3 nm).
IAU Name | Survey name | Redshift | Discovery (UT) | Discovery mag | Type | Phase | Notes
SN 2022gnp | ZTF22aadoihx | 0.0104 | 2022-04-05.33 | 17.7 (r) | SN Ib | Around peak | (1)
(1) The spectrum shows prominent He I features, and is that of a Type Ib supernova. The spectrum is red in colour and shows a strong narrow Na I D absorption feature (EW ~ 3.5 Å) at the host-galaxy redshift, indicating the transient is subject to substantial host-galaxy extinction. With reddening of E(B-V) = 0.8, GELATO (Harutyunyan et al. 2008, A&A, 488, 383) finds a good match for SN 2005hg around peak.
