Spectroscopic classification of Gaia16bba and Gaia16bbk with the Nordic Optical Telescope
ATel #9421; N. Elias-Rosa (INAF-Padova), S. Mattila (Turku), P. Lundqvist (Stockholm), M. Stritzinger (Aarhus U), S. Benetti (INAF-Padova), E. Cappellaro (INAF-Padova), N. Blagorodnova (Caltech), S. Davis (FSU), S. Dong (KIAA-PKU), M. Fraser (IoA), C. Gall (Aarhus U), J. Harmanen (Turku), D. Harrison (IoA), S. Hodgkin (IoA), E. Y. Hsiao (FSU), P. Jonker (SRON), T. Kangas (Turku), E. Kankare (QUB), H. Kuncarayakti (MAS, DAS), Z. Kostrzewa-Rutkowska (Warsaw/SRON), M. Nielsen (Aarhus U), P. Ochner (INAF-Padova), A. Pastorello (INAF-Padova), J. L. Prieto (UDP, MAS), T. Reynolds (Turku, NOT), C. Romero-Canizales (MAS, UDP), K. Stanek (OSU), F. Taddia (OKC), L. Tartaglia (INAF-Padova), G. Terreran (INAF-Padova/QUB), L. Tomasella (INAF-Padova), L. Wyrzykowski (Warsaw Observatory)
on 28 Aug 2016; 11:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: N. Elias-Rosa (nancy.elias@oapd.inaf.it)
Subjects: Optical, Supernovae
The NOT Unbiased Transient Survey (NUTS; ATel #8992) collaboration reports the spectroscopic
classification of Gaia16bba and Gaia16bbk. The candidates were discovered by the 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).
Survey Name | IAU Name | Host galaxy | Discovery (UT) | Discovery mag | Observation (UT) | Redshift | Type | Phase | Notes
Gaia16bba | SN 2016fbo | anonymous | 2016-07-17.29 | 17.3 | 2016-08-27.12 | 0.034 | SN Ia | -5d | (1)
Gaia16bbk | SN 2016fca | GALEXASC J011945.39+095344.2 | 2016-07-17.29 | 18.9 | 2016-08-27.13 | 0.027 | SN Ia | around max | (2)
(1) The best match is with the Type Ia SN 2002er and SN 2003du about one week before B-band maximum light. Using the redshift 0.034 (suggested by SNID), from the position of the minimum of the Si II 635nm feature, we infer an expansion velocity of ~10900 km/s for the ejected material.
(2) The best match is with the Type Ia SN 2003du around maximum light. Using the redshift 0.027 (suggested by SNID), from the position of the minimum of the Si II 635nm feature, we infer an expansion velocity of ~11000 km/s for the ejected material.
We acknowledge ESA Gaia (http://cosmos.esa.int/gaia), and the DPAC Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts/alertsindex) (Rixon et al, 2014, ATel #6593).
