Pre-discovery photometry of kait-18P = SN 2018aoq in NGC 4151
ATel #11498; S. V. Nazarov, D. N. Okhmat (CrAO), K. V. Sokolovsky (ASC Lebedev/SAI MSU), D. V. Denisenko (SAI MSU)
on 3 Apr 2018; 17:27 UT
Credential Certification: Kirill Sokolovsky (kirx@scan.sai.msu.ru)
Subjects: Optical, Supernovae
Referred to by ATel #: 11526
The optical transient kait-18P = 2018aoq was discovered on
2018-04-01.4316 by Lick Observatory Supernova Search at
the unfiltered magnitude of 15.3 1'13" from the center of NGC 4151
(z=0.00332, 17 Mpc NED). Spectroscopic observations with the 1.5m
Kanata telescope classified the transient as a Type II supernova.
We identified the supernova on images obtained 0.47 days prior to
discovery with the 0.7m AZT-8 telescope of the Crimean
Astrophysical Observatory (CrAO) in the framework of the ongoing
AGN monitoring program. The aperture photometry of the supernova
relative to the nearby star UCAC4 647-049444 (assuming B=15.077,
V=14.411, R=14.075, I=14.179 transformed from APASS following
Jester et al. 2005, AJ, 130, 873) resulted in the following
magnitudes (not corrected for the host galaxy light and
Galactic reddening):
# Mid.Obs.JD Mid.Obs.UT Filter Mag. Err. Exp.
2458209.4617 2018-03-31.9617 B 15.45 0.04 5x36sec
2458209.4622 2018-03-31.9622 V 15.68 0.07 5x24sec
2458209.4626 2018-03-31.9626 R 15.57 0.11 5x18sec
2458209.4633 2018-03-31.9633 I 15.68 0.07 5x24sec
The images of SN 2018aoq obtained with AZT-8 on 2018-03-31 are
available atSN2018aoq/"> http://scan.sai.msu.ru/~kirx/ATel/SN2018aoq/
SN 2018aoq at the Transient Name Server