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.
MR Ser: a polar cataclysmic [Observed: 16 April, 17, 18 July 2014]
Photometric observations of the polar cataclysmic MR Ser are presented and compared
with the ephemeris.
V1432 Aql: 2012 observations [Observed: 1 Jun, 18, 25, 30 Jul, 7, 17 Aug, 14 Sep, 14, 15, 19 Nov 2012]
New observations of this asynchronous polar confirm the 2007-2011
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.
VX Hya (2011-2012 season) [Observed: 21, 22, 27 Feb, 13 Mar 2012]
Time-series are presented for this pulsating star, after its sudden
pulsation change in 2008 and after the 2010-2011 season observations.
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.
UX Mon: time keeping and modelling of a binary [Observed: 13 Dec 2007, 11-16, 18 Feb, 8, 13, 14 March, 1, 4, 25, 29]
Time series of this eclipsing binary system with extra variability
are presented. The O-C analysis suggests the presence of a third star.
The observations are modelled with BinaryMaker3 and parameters of the
system are derived.