In:
Publications of the Astronomical Society of Japan, Oxford University Press (OUP), Vol. 54, No. 6 ( 2002-12-25), p. 987-997
Abstract:
GK Per is a unique cataclysmic variable star which has shown a nova explosion as well as dwarf nova-type outbursts, and has an intermediate-polar nature. We carried out $V$-band time-resolved photometry and $B$-band monitoring during the 1996 outburst. This outburst lasted for about 60 d, and was divided into three parts: a slow-rise branch for 35 d, a gradual-decay branch with a decay rate of $20.0 \,\mathrm{d} \,\mathrm{mag}^{-1}$ for $\sim 16 \,\mathrm{d}$, and a rapid-decline branch with a rate of $5.6 \,\mathrm{d} \,\mathrm{mag}^{-1}$ for $\sim 10 \,\mathrm{d}$. The $B-V$ color became bluest ($B-V \sim 0.18$) at about 10 d before the outburst maximum, which supports an idea that the outburst in GK Per is of the inside-out type. The spin pulse, 440-s quasi periodic oscillations (QPOs), and $\sim 5000$-s QPOs were detected in our light curve, as previously seen in X-ray and optical observations. In addition, we report on the discovery of an $\sim 300$-s periodicity, which is shorter than the spin period.
Type of Medium:
Online Resource
ISSN:
0004-6264
,
2053-051X
DOI:
10.1093/pasj/54.6.987
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2002
detail.hit.zdb_id:
2206640-8
detail.hit.zdb_id:
2083084-1
SSG:
16,12
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