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Near prediscovery brightness limit and follow-up photometry of PNV J00430954+4115399

ATel #5468; K. Hornoch, P. Kusnirak (Astronomical Institute, Ondrejov, Czech Republic), J. Vrastil (Astronomical Institute, Charles U., Prague, Czech Republic)
on 14 Oct 2013; 04:26 UT
Credential Certification: Allen W. Shafter (aws@nova.sdsu.edu)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 5475, 5503

On Oct. 9.300 UT a possible nova in M31 (with unfiltered magnitude 18.8 mag) was discovered by the Lick Observatory Supernova Search (LOSS). The object was designated PNV J00430954+4115399 and announced here . The object is not visible down to R = 21.1 mag on our co-added 1260-s R-band CCD frame taken on Oct. 8.734 UT using the 0.65-m telescope at Ondrejov. This near prediscovery non-detection significantly reduces the uncertainty in the time of optical outburst of the possible nova, which is important for determination of its SSS turn-on time in case it becomes a supersoft X-ray source.

In addition, We report the following R-band magnitudes which were obtained using the 0.65-m telescope at Ondrejov:

2013 Oct. 11.899 UT, 17.5 ± 0.2; 13.718, 17.45 ± 0.1.