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.
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.
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.
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 °.
CoRoT-1: observations of the exoplanet transits [Observed: 28 Dec 2008, 18, 21 Mar 2009]
Amateur observations of this transiting exoplanet
are presented and are modelled with BinaryMaker3.
WASP-2: possible detection of the exoplanet transit [Observed: 5 Aug, 11 Oct 2008]
Amateur observations of this transiting exoplanet are presented
and are modelled with BinaryMaker3.
VX Hya (2008-2009) phase variations [Observed: 24, 27, 28 Dec 2008, 29, 30 Jan, 17, 19, 22, 23 Mar 2009]
The strong phase shift that I detected in 2008 is confirmed with
IQ Eri: a cataclysmic in outburst [Observed: 27, 28 Dec 2008]
Time series for this cataclysmic variable in outburst are presented.
SDSS J213122.40-003937.0: a new cataclysmic [Observed: 23, 24, 27 Dec 2008]
Photometric measurements and a light curve for this newly discovered
variable are presented.
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.
V1432 Aql time keeping [Observed: 28 June, 22 July, 6, 30 August 2008]
Light curves for this asynchronous polar are presented. They show
the eclipses and the spin modulation. They are compared with ephemerides.
1RXS J180834.7+101041: a new cataclysmic variable with a nearby RRAB variable [Observed: 2, 3, 5 Aug 2008]
Time-series for this recently discovered cataclysmic variable and
for a nearby RR Lyrae variable are presented.
VX Hya (2008) free fall? [Observed: 7-13 Feb 2008]
Time-series for this pulsating star with multiple oscillations
are obtained. They are compared with the ephemeris of Fitch (1966): they
are too early by 3.7 hours. This is a strong change from previous, recent
HV Vir outburst [Observed: 14, 15 Feb 2008]
This UGWZ cataclysmic was reported as being in outburst.
Time-series of the beginning of the outburst, showing double peaks,
WX Eri / V1241 Tau: an eclipsing semi-detached binary system [Observed: 15 Oct, 29, 30 Nov, 13, 16 Dec 2007, 1, 23 Jan 2008]
Light curves of this eclipsing, semi-detached binary system
with a period of 0.8d are presented and are modeled with BinaryMaker3. No evidence
for a pulsating star in this system is found.
RXJ0944.5+0357 (VZ Sex) outburst [Observed: 1 Jan 2008]
Time series for this intermediate polar in outburst are presented.