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.
GSC 318-805 / V551 Vir: a Blazhko star [Observed: 42 sessions from 2009 to 2015]
Photometric observations of the RR Lyrae star GSC 318-905/V551
Vir are presented and analyzed. They show a Blazhko modulation with a
period of 53.9 days and evidence for irregularities. An animation showing
the Blazhko modulation is presented.
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.
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.
RV Cet: a Blazhko pulsating star [Observed: 26 sessions in 2009-2011]
Photometry observations of this RRAB pulsating star are presented,
with a GIF animation
showing the Blazhko modulation.
SDSS J015543.40+002807.2 (FL Cet): a cataclysmic polar with deep eclipses [Observed: 6, 8 Oct 2010]
Light curves for this cataclysmic polar with deep, narrow eclipses
are presented. The eclipse times are in agreement with the 2006 ephemeris.
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.
Occultation by asteroid (429) Lotis [Observed: 8 Aug 2010]
The minor planet 429 Lotis was observed occulting a 11.3 mag star:
the size of the shadow flying over my location was 19 +/- 5 km.
EX Hya outburst [Observed: 22, 24 May 2010]
A light curve of this cataclysmic system in outburst is reported.
V1412 Aql: a simulation 
A Monte Carlo simulation which may be useful to search for eclipses