0.052-day variability of CSS160603:162117+441254.2
ATel #9138; E. P. Pavlenko, A. A. Sosnovskij, O. I. Antonyuk (Crimean Astrophysical Observatory)
on 10 Jun 2016; 19:18 UT
Credential Certification: Elena Pavlenko (eppavlenko@gmail.com)
Subjects: Optical, Binary, Cataclysmic Variable, Star, Variables
Referred to by ATel #: 9141
We report a result of unfiltered photometric observations of
CSS160603:162117+441254.2 = 1SWASP J162117.36+441254.2 =
2MASS J16211735+4412541 (ATel #9112, #9113, #9122, #9132;
vsnet-alert 19861, 19862, 19865) during UT 2016 June 5.30-5.52,
7.31-7.54, 8.35-8.54, 9.32-9.54
with the Cassegrain 38-cm telescope + CCD APOGEE E47 of
the Crimean astrophysical observatory. The exposure time
was 30s for the data of June 5,7,8 and 45s for the
data of June 9.
We found a 0.052106(30)-day (4502 s) variability with amplitude
of ~0.1 mag superposed on the out-of
eclipse light curve (see periodogram for all data after extracting the data of eclipse and removing trend corresponding
to the nightly light curve). This variability is highly coherent for
data of UT 2016 June 5, 7, 9 and is practically absent in data of
June 8 (see the phased light curves).
We suppose that this short period potentially may have relation to
the magnetic pole/poles of a white dwarf and so this system could
be a candidate to the intermediate polars. Further observations
are needed to confirm or refute our supposition.
