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OGLE observations of Nova WISE J181834.00-284919.6

ATel #4296; Wyrzykowski Lukasz, Poleski Radoslaw, Udalski Andrzej on behalf of the OGLE team (Warsaw University Astronomical Observatory, Poland)
on 4 Aug 2012; 11:23 UT
Credential Certification: Lukasz Wyrzykowski (wyrzykow@ast.cam.ac.uk)

Subjects: Optical, Nova

We report on findings in the archival OGLE-III and OGLE-IV data for Nova J181834.00-284919.6 detected in WISE data (Scholz et al., ATel #4268) and confirmed spectroscopically by Cao et al. (ATel #4292) as FeII nova. The object was observed several times in 2001-2003 at its quiescence with mean magnitude of 19.7 in I-band. The baseline clearly exhibited some variability, but the data are too scarce to provide meaningful period measurement.

The region of the sky containing the Nova was then observed again since 2010 in the course of the OGLE-IV (http://ogle.astrouw.edu.pl), but the object itself was located at the edge of the field. Nevertheless, we were able to detect a bright object of about 11 mag in I-band on frames from 11 March 2010, indicating the outburst occurred in early 2010. The next available frames on 25 April 2010 and 27 May 2010 show a fainter object at about 13.8 mag. In October 2011 the Nova had about 17.5 mag in I-band, indicating very slow decline of its light curve. Detailed light curve might be produced on request.

Finding charts and light curve