>WHT classification of Gaia-discovered transient candidates
ATel #7005; P. G. Jonker (SRON/CfA/RU Nijmegen), M. Fraser, S. T. Hodgkin, H. Campbell (IoA Cambridge), M. Torres (SRON/RU Nijmegen), T. Wevers (RU Nijmegen), S. van Velzen (JHU), G. Rixon, S. Koposov, N. Walton (IoA Cambridge), L. Wyrzykowski, Z. Kostrzewa-Rutkowska (Warsaw Observatory)
on 29 Jan 2015; 12:11 UT
Distributed as an Instant Email Notice Transients
Credential Certification: P.G. Jonker (p.jonker@sron.nl)
Subjects: Optical, Transient
We report on low to intermediate resolution optical spectra of
Gaia-discovered transients obtained with the William Herschel
Telescope + ISIS + R300B/R158R on the night of 2015 January
3. Candidates were obtained during the Gaia Photometric Science Alerts
validation phase (http://gaia.ac.uk/selected-gaia-science-alerts).
The column called Gaia provides the Gaia-discovery date and Gaia
G-band magnitude of the transient source.
Name RA Dec Gaia Comment
GAIA14aaq 11:15:55.33 +49:23:15.9 22-09-14, 18.43 Stellar, M-star TiO bands
GAIA14acr 03:58:51.38 +14:11:15.2 08-10-14, 18.26 Stellar, K-star CaII and Halpha
GAIA14adu 07:59:14.91 +31:37:15.7 03-12-14, 18.98 Early type galaxy?
GAIA14ady 08:08:46.92 +23:01:45.5 26-11-14, 18.94 Early type galaxy at z=0.1
GAIA14aeb 10:54:51.61 -18:08:54.0 21-11-14, 17.54 Stellar, K-star CaII and Halpha
GAIA15aac 22:18:18.75 +41:42:44.9 25-11-14, 17.95 Stellar, K-star CaII and Halpha
GAIA15aaf 16:16:30.75 +07:35:21.2 29-12-14, 18.85 Type II SN
The candidates classified as "Stellar" are most likely active
stars. The nature of the variability of the early type galaxies is
unknown.
We acknowledge ESA Gaia (http://cosmos.esa.int/gaia), and the DPAC
Photometric Science Alerts Team
(http://gaia.ac.uk/selected-gaia-science-alerts).
