[vsnet-alert 21605] ASASSN-17pb: superhump period and another period?
tkato at kusastro.kyoto-u.ac.jp
Tue Nov 21 10:37:30 JST 2017
ASASSN-17pb: superhump period and another period?
Tonny Vanmunster, Ian Miller and Kyoto U. team have
reported observations. On the most recent two nights,
this object showed well-established superhumps
as Tonny reported. The data, however, could not be
expressed by a single period. It was likely that
there was stage A-B transition between Nov. 18 and 19.
Miller's data on Nov. 16 showed short-period variations,
which might have been growing phase of superhumps.
The data, however, could not be expressed by
the superhump period or its harmonic.
An independent analysis gave a period of 0.0170(2) d
with an amplitude of 0.14 mag. Let's see whether this
is the second period of this object and may appear
again (such as in an intermediate polar).
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