Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical detection of the rapidly spinning white dwarf in V1460 Her   Accreting magnetic white dwarfs offer an opportunity to understand the
interplay between spin-up and spin-down torques in binary systems. Monitoring
of the white dwarf spin may reveal whether the white dwarf spin is currently in
a state of near-equilibrium, or of uni-directional evolution towards longer or
shorter periods, reflecting the recent history of the system and providing
constraints for evolutionary models. This makes the monitoring of the spin
history of magnetic white dwarfs of high interest. In this paper we report the
results of a campaign of follow-up optical photometry to detect and track the
39 sec white dwarf spin pulses recently discovered in Hubble Space Telescope
data of the cataclysmic variable V1460 Her. We find the spin pulsations to be
present in g-band photometry at a typical amplitude of 0.4%. Under favourable
observing conditions, the spin signal is detectable using 2-meter class
telescopes. We measured pulse-arrival times for all our observations, which
allowed us to derive a precise ephemeris for the white dwarf spin. We have also
derived an orbital modulation correction that can be applied to the
measurements. With our limited baseline of just over four years, we detect no
evidence yet for spin-up or spin-down of the white dwarf, obtaining a lower
limit of |P/Pdot|> 4e7 years, which is already 4 to 8 times longer than the
timescales measured in two other cataclysmic variable systems containing
rapidly rotating white dwarfs, AE Aqr and AR Sco.

20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin