OGLE-IV Transient Search report 07 August 2015

ATel #7883; L. Wyrzykowski, Z. Kostrzewa-Rutkowska, A. Udalski, S. Kozlowski, R. Poleski, G. Pietrzynski, M. Sitek (Warsaw University Astronomical Observatory, Poland), on behalf of the OGLE team
on 7 Aug 2015; 09:29 UT
Credential Certification: Lukasz Wyrzykowski (wyrzykow@ast.cam.ac.uk)

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The OGLE-IV Transient Detection System (Wyrzykowski et al. 2014, AcA,64,197; Kozlowski et al. 2013) reports the discovery of 10 new transients. Most of them appeared near or on top of apparent galaxies and their light curves resemble those of supernovae near or after their peak brightness. Some hostless transients disappeared in the next observation and therefore the most likely are dwarf novae without their progenitor visible (fainter than I~22 mag).

Name RA(J2000.0) Dec(J2000.0) discovery_JD discovery_Imag Notes
OGLE15ed 5:47:35.21 -61:31:04.8 2457146.51709 20.200 old transient, probably gone now
OGLE15ee 0:22:46.27 -69:41:52.8 2457218.86884 18.572 independent duplicate detection of OGLE15dw, nuclear transient (<0.8'')
OGLE15ef 23:32:06.00 -70:05:29.7 2457220.85712 19.130 likely CV, already gone
OGLE15eg 1:25:39.66 -69:21:51.1 2457221.86253 19.036
OGLE15eh 4:04:07.01 -65:09:46.5 2457226.91438 18.368 likely CV, already gone
OGLE15ei 2:41:59.17 -70:27:08.6 2457228.90125 19.332
OGLE15ej 2:45:21.25 -73:39:23.6 2457228.90547 18.927
OGLE15ek 3:00:05.21 -68:52:33.1 2457228.92467 19.925
OGLE15el 3:52:02.67 -64:59:27.6 2457230.88500 18.689
OGLE15em 0:05:20.63 -65:55:36.1 2457230.83231 19.228 CV or a very fast transient (<9days) next to a galaxy
OGLE15en 0:47:37.95 -65:04:12.3 2457230.78279 20.633

Photometric and spectroscopic follow-up is strongly encouraged.

Finding charts and light curves are available here.