V884 Her: an improved ephemeris [Observed: 2 sessions in 2018, 3 in 2017, 6 in 2016, 6 in 2015 ]
Photometric observations of the cataclysmic polar V884 Her are
presented. An improved ephemeris for the eclipses is obtained.
FO Aqr: 2017 season and a new fading [Observed: 7 June, 28 July, 21, 22 Aug, 12, 14, 24 Sep, 5, 14, 26 Oct]
Observations of the intermediate polar FO Aqr are presented for 2017.
They show that the object is fading.
OV Boo rare outburst [Observed: 15, 16, 29 Mar, 7, 20 Apr 2017]
Time-series at the outburst of March-April 2017 are reported.
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.
FO Aqr 2016 low state and recovery [Observed: 10 Jul, 31 Oct, 6, 8 Nov, 26 Dec 2015, 28 Jun, 3, 9, 18, 28]
In 2016, the intermediate polar FO Aqr has been observed in an
unusual low state and slowly recovering. The O-C are compared with those from my previous observations.
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.
V884 Her: a polar [Observed: 11, 19 Feb, 6, 12 Mar, 6 Apr, 27 May 2015]
The linear polarization of this cataclysmic polar is detected,
and the orbital minima are found to be way off from the 1993 ephemeris.
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.
NSV 02026 [Observed: 10, 11, 12, 19 Feb, 5, 12 Mar 2015]
Photometric observations of NSV 02026, a candidate UGSU, are presented.
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.
AE Aqr [Observed: 13, 16, 17 Jun 2012]
Time-series of this unusual cataclysmic star were obtained with B and V
filters. Flares were observed, with the object becoming bluer.
SDSS J015543.40+002807.2 (FL Cet) low state [Observed: 28 Sep, 15, 16, 17, 18 Nov 2011]
This cataclysmic polar with deep, narrow eclipses has dropped by 2 magnitudes since September 2011.
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.
EX Hya [Observed: 9 Feb 2011]
A light curve for this cataclysmic star, classified as both IP and NL,
is presented and compared with the ephemeris, after its May 2010 outburst.
EX Hya outburst [Observed: 22, 24 May 2010]
A light curve of this cataclysmic system in outburst is reported.
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.
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.
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,
RXJ0944.5+0357 (VZ Sex) outburst [Observed: 1 Jan 2008]
Time series for this intermediate polar in outburst are presented.
VV Pup: polar variations [Observed: 13 Jan, 2, 15, 20 Feb, 30 Nov 2007]
This cataclysmic polar was observed in low state at the beginning
of 2007. It was back to its usual level in November.
V1309 Ori: an eclipsing polar [Observed: 26 Dec 2006, 15 Feb, 7 Nov 2007]
A phase plot of this eclipsing polar is presented. I try to model it
V1432 Aql: an asynchronous polar [Observed: 7, 12, 13, 14, 15 July, 5, 18 Aug, 5, 15 Sept 2007]
Light curves for this magnetic cataclysmic system are presented.
They show the eclipses and the spin modulation.
V1193 Ori, a flickering cataclysmic [Observed: 18 Nov, 13, 14 Dec 2006]
This cataclysmic system is observed flickering
BT Mon: no more hump [Observed: 13, 15 Dec 2006]
At the end of 2005, I observed this eclipsing cataclysmic system with a hump.
This hump is no longer present.
SDSS J040714.78-064425.1: an eclipsing cataclysmic [Observed: 30 Nov, 13, 14, 22, 23, 24, 25 Dec 2006, 12, 13 Jan 2007]
Time series for this deeply eclipsing cataclysmic
system are presented.
EG Aqr superoutburst [Observed: 14, 18 Nov 2006]
Time series for this cataclysmic star are presented during its 2006 (super)outburst.
V603 Aql: a flickering nova remnant [Observed: 2, 23 July 2006]
Light curves for this cataclysmic variable, the remnant of a 1918 nova, are presented.
VV Pup the polar [Observed: 25, 31 Jan, 1 Feb 2006]
Light curves for this cataclysmic polar are presented.
BT Mon: eclipser with a hump [Observed: 26 Oct, 1 Nov, 24 Dec 2005, 19 Jan 2006]
Light curves of this cataclysmic star are presented. They show
the eclipse with a large hump. They are modelled with BinaryMaker3.
RX J1039.7-0507 [Observed: 1 Feb, 29 March, 3 Apr 2006]
Observations of this faint, large amplitude cataclysmic star
with a small telescope are presented.
LQ Peg [Observed: 30 Sept, 10 Oct 2005]
Light curves for this anti-dwarf nova are presented.
AE Aqr flares (and HX Aqr) [Observed: 29, 30, 31 Aug 2005]
Time-series of this unusual cataclysmic star were obtained with
B and V filters. Flares were observed, with strong color changes.
V442 Oph [Observed: 2, 8, 18, 25 June, 5, 16, 17 July, 5 August 2005]
Time-series for this anti-dwarf nova are presented.
EX Hya [Observed: 19, 23, 24, 29 May, 6 June 2004]
Light curves for this cataclysmic star, classified as both IP and NL, are presented and compared with the ephemeris.
CN Ori [Observations: 11, 14, 15 Jan 2005]
Light curves for this UGZ cataclysmic star are presented.
SW Sex observation and BinaryMaker3 model [Observations: 10, 11, 14, 15 January 2005]
SW Sex is an accreting binary with deep, non symmetrical eclipses.
The observations are modelled with the BinaryMaker3 program.
HQ Mon activity [Observations: 4, 7, 8, 9January 2005]
Light curves for this poorly known cataclysmic variable are presented.
BF Eri flickering [Observations: October, November 2004]
The cataclysmic dwarf nova BF Eri is observed by differential photometry.
The light curves are searched for periodicities.
V2400 Oph [Observations: several sessions between July and Sept 2004]
V2400 Oph is an IP, discless cataclysmic star. It is observed (the data are not very good)
to flicker and that the color is V-R=0.3+/-0.1.
17 Sept 2004: TY PsA superoutburst [Observations: Sept ,Oct 2004]
TY PsA was 4 magnitudes brighter than usual in September 2004.