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Gaia15agc and Gaia15agh transients confirmed by Mercator imaging

ATel #7594; R. I. Anderson (Physics and Astronomy Department, The Johns Hopkins University, Baltimore, MD, USA), L. Palaversa, N. Mowlavi, L. Eyer (Department of Astronomy, University of Geneva, Switzerland
on 5 Jun 2015; 16:33 UT
Credential Certification: Lovro Palaversa (lovro.palaversa@unige.ch)

Subjects: Optical, Supernovae, Transient, Variables

We report confirmation of Gaia Science Alerts transients Gaia15agc and Gaia15agh. Images were obtained in U, G, and R bands of the Maia instrument mounted to the Flemish 1.2m Mercator Telescope at Roque de los Muchachos observatory, La Palma, Canary Islands, Spain, on 2015 June 04 ca. 21UT.

Gaia15agc is located within a cluster of galaxies NSC J121821+353735. The source is not present in the archival 2MASS, DSS and SDSS images.

Gaia15agh is located in the spiral arms of galaxy SDSS J120405.42+140355.9 . This galaxy is listed as belonging to a cluster of galaxies in SIMBAD. The location of the transient in the spiral arms of the galaxy renders it a likely supernova candidate.

MAIA: MAIA G band 400x400 pixel cut-out images are provided (N is up, E is left and scale is 0.276"/pix).

Gaia15agc Gaia15agh
MJD U G R U G R
57,177.9 ~19.8 ~18.1 ~17.8 ~18.4 ~17.2 ~17.2


The photometric calibrations were obtained using the Cambridge Photometric Calibration Server (CPCS), designed and maintained by Sergey Koposov and Lukasz Wyrzykowski.