NOT spectroscopic classification of supernovae Gaia15afx and Gaia15agd

ATel #7628; T. Reynolds (University of Turku), N. Blagorodnova (University of Cambridge), S. Mattila, J. Harmanen, T. Kangas (University of Turku), M. Fraser, S. Hodgkin, H. Campbell (University of Cambridge), L. Wyrzykowski (Warsaw University Observatory)
on 12 Jun 2015; 19:54 UT
Credential Certification: Seppo Mattila (seppo.mattila@utu.fi)

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We report the spectroscopic classification of supernovae Gaia15afx and Gaia15agd based on low-resolution spectra obtained on Jun. 11.9 UT with the Nordic Optical Telescope (+ ALFOSC; range 320-910 nm).

Gaia15afx and Gaia15agd were discovered by the Gaia Photometric Science Alerts programme at magnitudes of 18.9 and 18.4 on 2015 May 24.0 UT and May 29.3 UT, respectively. Gaia15afx is located ~2.8 arcsec from the centre of the galaxy SDSS J110931.09+040950.0 and Gaia15agd ~3.5 arcsec from the centre of the galaxy SDSS J112617.58+282159.6.

 
Name             | RA (J2000)  | Dec (J2000)  | Disc. Date | Disc Mag |  z    | Type    | Phase            | Notes 
 
Gaia15afx        | 11:09:31.15 | +04:09:47.4  | 2015-05-24 | 18.9     |~0.052 | SN Ia   | ~1 month past max| (1)  
Gaia15agd        | 11:26:17.38 | +28:22:02.0  | 2015-05-29 | 18.4     |~0.030 | SN II   | ~1 week past max | (2) 

(1) Matches found with several normal Type Ia SNe about one month after the max. light.

(2) Best match found with SN2004et about one week after the max. light.

The classifications were done with GELATO (Harutyunyan et al. 2008, A&A,488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024). We acknowledge ESA Gaia (http://cosmos.esa.int/gaia), and the DPAC Photometric Science Alerts Team (http://gaia.ac.uk/selected-gaia-science-alerts) (Rixon et al,2014, ATel #6593).