Spectroscopic classification of Gaia, ASAS-SN and TOCP transients with the WHT+ISIS
ATel #7641; H. Campbell (University of Cambridge), T. Wevers (RU Nijmegen), M. Fraser (University of Cambridge), P. G. Jonker (SRON & RU Nijmegen), L. Wyrzykowski (Warsaw Observatory), S. Hodgkin, N. Blagorodnova (University of Cambridge)
on 16 Jun 2015; 15:09 UT
Credential Certification: Morgan Fraser (mf@ast.cam.ac.uk)
Subjects: Optical, Cataclysmic Variable, Star, Supernovae, Transient
We report spectroscopic confirmation and classifications for reported Gaia Photometric Science Alerts (http://gaia.ac.uk/selected-gaia-science-alerts), together with targets from the All-Sky Automated Survey for Supernovae (ASAS-SN; Shappee et al. 2014) and the TOCP list. All spectra were taken with the 4.2m William Herschel Telescope on La Palma, over the nights of 11 to 12 June. Low resolution spectra were taken using ISIS with the R158R and R300B gratings. The classifications were done with SNID (Blondin and Tonry 2007, ApJ, 666, 1024).
Name RA Dec Date Classification Comments
Gaia15agj 03:11:11.50 +37:58:2.10 2015-06-11 SN Ia At max, z=0.04 (also classified in ATEL 7623)
Gaia15ada 11:41:02.05 +65:02:33.3 2015-06-11 SN IIP Normal IIP mid-plateau, z=0.04 (aka PS15ye)
Gaia15agh 12:04:05.11 +14:04:04.9 2015-06-11 SN Ia +2 weeks, z=0.04
Gaia15adt 14:01:14.96 +44:18:29.8 2015-06-11 SN Ia +2 months, z=0.06
Gaia15adn 14:17:00.71 +62:54:42.9 2015-06-11 SN Ia +2 months, z=0.04
Gaia15adh 17:12:30.88 +48:28:11.9 2015-06-11 SN Ia +3 months, z=0.06
Gaia15aew 22:43:02.60 +49:54:49.0 2015-06-11 Stellar Balmer absorption
Gaia15aeq 23:31:29.42 +24:16:34.7 2015-06-11 SN Ia +1.5 months, z=0.07
Gaia15aez 23:31:27.58 +22:50:58.4 2015-06-11 SN II z=0.07 (Broad H alpha emission seen in low S/N spectrum)
Gaia15aeu 11:00:37.85 -11:56:47.6 2015-06-12 Stellar Red with strong narrow Na D absorption.
ASASSN-15ku 10:44:22.06 +18:34:59.5 2015-06-12 CV Broad wing Halpha absorption, with filled in core from narrow emission
Gaia15agc 12:18:23.70 +35:35:24.0 2015-06-12 SN Ia +2 weeks, z=0.04
Gaia15adl 16:41:16.95 +39:17:28.7 2015-06-12 CCSN Broad nebular emission lines, including [Ca] and [O] at z=0.03 (consistent with MCG +7-34-134)
Gaia15afr 23:29:33.60 +39:34:22.7 2015-06-12 SN II Broad Halpha emission, z=00.03
Gaia15agf 22:02:29.36 -20:19:46.0 2015-06-12 SN Ia +2 weeks, z=0.06
ASASSN-15kw 17:19:37.10 +04:31:23.8 2015-06-12 CV Strong Halpha in emission, FWHM ~1200km\s from Lorentzian fit. Also HeII emission at 5876
PSN J14372160+3634018 14:37:21.60 +36:34:01.8 2015-06-12 SN II Shows broad Halpha, consistent with a Type II SN soon after explosion.
We acknowledge ESA Gaia (cosmos.esa.int/gaia), and the DPAC Photometric Science Alerts Team (http://gaia.ac.uk/selected-gaia-science-alerts).
