FO Aqr time keeping [Observed: 49 sessions from 2004 to 2015]
Twelve seasons, from 2004 to 2015, of photometric monitoring of
the intermediate polar FO Aqr are presented and are compared with previous
observations. The ambiguities in the cycle counting can be lifted and
a new O-C diagram, spanning 34 y,r is presented, along with new ephemerides.
BG CMi time keeping [Observed: 2005-2016]
Twelve seasons, from 2005 to 2016, of photometric monitoring of the intermediate polar BG CMi are presented and are compared with previous observations. The spin up of the white dwarf is found to have undergone a major change between 1996 and 2005. There is also some evidence for sideband signals.
is also some evidence for sideband signals.
The asynchronous polar V1432 Aquilae and its path back to synchronism 
V1432 Aquilae is the only known eclipsing asynchronous polar. In this respect it is unique and therefore merits
our attention. We report the results of a 15-year campaign by the globally distributed Center for Backyard Astrophysics to observe V1432 Aql and investigate its return to synchronism. Originally knocked out of
synchrony by a nova explosion before observing records began, the magnetic white dwarf in V1432 Aql is
currently rotating slower than the orbital period but is gradually catching up. The fortuitously high inclination of
the binary orbit affords us the bonus of eclipses providing a regular clock against which these temporal changes
can be assessed. At the present rate, synchronism should be achieved around 2100. The continually changing trajectory of the accretion stream as it follows the magnetic field lines of the rotating white dwarf
produces a complex pattern of light emission which we have measured and documented, providing comprehensive
observational evidence against which physical models of the system can be tested.
AO Psc time keeping [Observed: 74 sessions from 2004 to 2014]
Eleven seasons, from 2004 to 2014, of photometric monitoring of the intermediate polar AO Psc are presented and are compared
with previous observations. The spin up of the white dwarf is found to be
slowing down. The amplitudes of the modulated and non-modulated components of the
brightness are found to have undergone a major change in 2007.
AR Ser: photometric observations of a Blazhko star [Observed: 2010-2014]
Photometric observations in 2010-2014 of the RR Lyrae star AR Serpentis are presented and analyzed. Two Blazhko modulations of comparable amplitude are detected, with the periods 89 and 108 days, and with evidence for irregularities.
KV Cnc 
Photometric observations of this Blazhko star are presented and analyzed.
V1432 Aql: 5 more years of observations [Observed: 28 sessions in 2007-2011.]
Photometry observations of the asynchronous polar V1432 Aql are presented.
Ephemerides for the orbital motion and for the spin are derived and are compared
with previous ephemerides. For the spin, there is some evidence for a secondary
derivative of the period.
(939) Isberga: a binary asteroid [Observed: 21, 22 Oct, 12, 13, 15 Nov 2011]
Light curves for this binary asteroid are presented, showing the
spin modulation and eclipses.
VX Hydrae: observation of a sudden change in a pulsating star [Observed: March 2005-April 2010]
Time-series of VX Hya from March 2005 to April 2010 are analyzed.
A period jump is discovered to happen in 2008 in all the pulsation modes,
being at its strongest for the overtone.
VZ Lib: a contact binary in a ternary system [Observed: 2007-2009, 14 sessions]
Time series of this eclipsing contact binary are reported and
times of minima (ToM) of the eclipses are measured. This system has a
third component. From the O-C analysis of the observed ToM and of those in
the literature, the orbital parameters of the third body can be
derived: the orbital period is 34.8 yr and the inclination is 11.5 °.
GRB 030913 
Analysis of images of GRB 030913, with a negative result.