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OGLE-IV Transient Search report 11.March 2013

ATel #4875; L. Wyrzykowski, A. Udalski, S. Kozlowski (Warsaw University Astronomical Observatory, Poland), on behalf of the OGLE team
on 11 Mar 2013; 04:19 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Lukasz Wyrzykowski (wyrzykow@ast.cam.ac.uk)

Subjects: Optical, Supernovae, Transient

The OGLE-IV Transient Search (Wyrzykowski et al. ATEL #4495, Kozlowski et al. 2013) reports the discovery of two on-going supernova candidates, near their peaks or on the rise, in the magnitude range 19-19.5 in the I-band. All candidates are located next to apparent galaxies and their light curves clearly resemble those of supernovae.

Name RA(J2000.0) Dec(J2000.0) discovery_JD
OGLE-2013-SN-018 4:39:13.81 -67:23:36.4 2456360.58480
OGLE-2013-SN-019 2:27:33.91 -75:08:16.0 2456361.51401 (1)

(1)The light curve shows additional small amplitude outburst about 170 days prior to the main peak, however, the photometric data from 2011 and 2012 show no sign of variability in this galaxy. This could still be an indication of AGN-like activity, however, the supernova-like outburst occurred at least 2 pixels (0.5 arcsec) away from the centre of the galaxy visible there.

Photometric and spectroscopic follow-up is strongly encouraged.

Finding charts and light curves are available here.