BVRI Photometry of the Supernova Candidate Gaia16ath
ATel #9238; J. Vinko (Konkoly Obs., U Szeged, UT Austin), T. Feher, A. Gyurita, M. Redli, D. Sukolova (U Szeged)
on 12 Jul 2016; 01:24 UT
Credential Certification: Jozsef Vinko (vinko@astro.as.utexas.edu)
Subjects: Optical, Supernovae, Transient
We report confirmation and photometry of the recently discovered
Gaia Science Alerts transient
Gaia16ath.
CCD frames were taken with the 60/90 cm Schmidt telescope through Bessell B,V,R,I filters
at Konkoly Observatory, Piszkesteto, Hungary on July 11.01 UT.
The transient was detected with high significance (S/N > 20) in all bands.
A color image can be seen here.
Photometry was computed using local comparison stars tied to a
Landolt photometric sequence taken
on the same night during photometric conditions.
The following Vega-magnitudes have been obtained for Gaia16ath:
MJD B eB V eV R eR I eI
57580.01 18.76 0.07 18.53 0.04 18.38 0.08 18.60 0.11
Gaia16ath appears to be associated with the galaxy
SDSS J234930.88+172208.2,
which has a photometric redshift of z=0.075 +/- 0.017, implying a luminosity distance of 326 Mpc (assuming H0=73 km/s/Mpc). Adopting this distance and correcting for the interstellar
extinction within the Milky Way, the transient has a V-band absolute magnitude of -19.16 mag.
Both the observed blue color and the brightness suggest that Gaia16ath is a Type Ia
supernova near maximum light. Spectroscopic observations are encouraged.
We acknowledge ESA Gaia, DPAC and the Photometric Science Alerts Team
(http://gsaweb.ast.cam.ac.uk/alerts).
