Asiago spectroscopic observation of AT2016eqf and AT2016eqg
ATel #9360; A. Floers, S. Taubenberger (ESO), L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, G. Terreran, M. Turatto (INAF OAPd)
on 10 Aug 2016; 07:24 UT
Credential Certification: Lina Tomasella (email@example.com)
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of AT 2016eqf and AT 2016eqg, both discovered by the Gaia satellite. For AT2016eqf the Gaia Photometric Science Alerts programme reports a discovery magnitude of 17.51 on UT 2016-08-01.30 (after a non-detection on 2016-06-24), for AT2016eqg a discovery magnitude of 17.88 on 2016-08-02.27 (after a non-detection on 2016-04-23).
The observations were performed with the Asiago 1.82 m Copernico Telescope equipped with AFOSC (range 340-820 nm; resolution 1.4 nm).
Name | Gaia name | Host galaxy | Redshift | Discovery mag | Observation (UT) | Type | Notes
AT 2016eqf | Gaia16axt | - | - | 17.51 | 2016-08-09.09 | CV | (1)
AT 2016eqg | Gaia16axu | - | _ | 17.88 | 2016-08-08.96 | | (2)
(1) The blue spectrum shows broad absorption lines about a central emission core of Balmer lines at zero redshift, as well as He I 447.1 nm.
An absorption feature of NaD is also detected. The spectrum is consistent with those of a dwarf nova following outburst (cf. Liu et al. 1999, ApJSS 122, 243; ApJSS 122, 257; Liu et al. 2000 ApJSS 128, 387).
(2) The spectrum shows a blue continuum. The signal-to-noise ratio is not sufficient to identify spectral lines, except a signature of Hbeta at zero redshift. Classified as a CV in Atel#9358.
Padova-Asiago SN group