Spectroscopic observation of AT2019lls and SN2019lqo by NUTS (NOT Un-biased Transient Survey)
ATel #12961; S. Bose (KIAA), S. Holmbo (Aarhus), S. Mattila, E. Kankare (Turku), M. Stritzinger (Aarhus), Teppo Heikkila (Turku), P. Chen (KIAA), on behalf of the NUTS2 collaboration
on 26 Jul 2019; 10:04 UT
Credential Certification: Subhash Bose (email@subhashbose.com)
The Nordic Optical Telescope (NOT) Unbiased Transient Survey (NUTS; ATel #8992) reports the spectroscopic
classification of optical transients 2019lls (MASTEROT J203053.79+384020.1) and 2019lqo (Gaia19dcu; in the luminous infrared galaxy Arp 299).
The candidates were discovered by MASTER Net and Gaia Photometric Science survey.
The observations were performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC (range 350-950 nm; resolution 1.6 nm FWHM).
IAU Name | Discovery (UT) | Discovery mag | Observation (UT) | Redshift | Type | Phase | Notes
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AT2019lls | 2019-07-18.91 | 15.0 | 2019-07-25.08 | ---- | CV | -- |
SN2019lqo | 2019-07-21.32 | 18.3 | 2019-07-24.87 | 0.010300 (NED) | II | -- | (1)
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(1) The spectrum shows broad H Balmer lines with a well developed P-Cygni profile along with prominent CaII triplet lines. SNID and Gelato found matches with early spectra of SNe IIb. The estimated redshift is consistent with that of the host galaxy Arp 299. The presence of strong Na ID absorption at the rest wavelength of the host galaxy, and also the overall red appearance of the spectrum indicate a significant host galaxy extinction.
Classifications were performed using the SNID (Blondin and Tonry 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al. 2008, A&A, 488, 383) tool. Calibrated spectra and additional information can be retrieved in the IAU Transient Name Server.
