Asiago spectroscopic observations of three transients
ATel #13386; L. Tomasella, I. Salmaso, S. Benetti, A. Pastorello, E. Cappellaro, M. Turatto, N. Elias-Rosa (OAPd-INAF)
on 3 Jan 2020; 11:28 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Andrea Pastorello (andrea.pastorello@oapd.inaf.it)
Subjects: Optical, Cataclysmic Variable, Supernovae, Transient
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of MASTER OT J071845.44+194439.4 (AT2020ae), ASASSN-19aea (AT2019ybw), Gaia19ftw (AT2019yxp).
The targets were supplied by the All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014), by MASTER-IAC auto-detection system (Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) and Gaia satellite.
The observation was performed with the Asiago 1.82m Copernico Telescope (+ AFOSC; range 340-820 nm; resolution 1.4 nm).
Survey name | IAU name | Host galaxy | Disc. Date (UT)| Obs. Date (UT)| redshift | type | phase | notes
MASTER OT J071845.44+194439.4 | AT2020ae | Milky Way | 2020-01-01 | 2020-01-02 | - | CV | - | 1
ASASSN-19aea | AT2019ybw | NGC3395 | 2019-12-27 | 2020-01-02 | 0.0054 | galaxy | - | 2
Gaia19ftw | SN2019yxp | IC995 | 2019-12-27 | 2020-01-02 | 0.010 | Ib | post maximum | 3
(1) The Afosc spectrum shows Balmer and He I absorptions at rest wavelength and a very blue continuum. There is a weak emission core in the Halpha absorption. The object is most likely a Galactic CV.
(2) At the given position there is no stellar transient brighter than g~18.5 mag.
(3) Several broad Helium features are clearly detected.
The classification was performed using the GELATO (Harutyunyan et al. 2008, A&A, 488, 383)
and SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools.
The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.
