Welcome to my
Variable Star Pages
The science of Astronomy is unique. A great deal of astronomical research depends on the work of highly skilled amateur astronomers that provide a pivotal role in the constant monitoring of variable stars.
I observe and monitor variable stars particularly the cataclysmic (explosive ) variable stars (CVs) for outbursts. Recorded observations are then sent to various variable star organizations which include, the American Association of Variable Star Observers (AAVSO), the research section of the Royal Astronomical Society of New Zealand, Variable Stars South (VSS) and the Variable Star Network (VSNET) a global professional-amateur network of researches in variable stars.
These pages tell my story, show a selection of light curves, links to articles, dramatic events, transient objects and cataclysmic variables (CVs).
300,000 Visual Variable Star Observations!
Article on my 300,000th visual variable star observation achieved on October 6, 2018, covering my observing career published by The British Astronomical Association Variable Star Section.
The current observations page will show my latest observations, outbursts detections, and activity on variable stars.
My visual light curve on the eclipsing symbiotic star AR Pav with a period of 604.5 days
22″ f/3.8 Telescope “Infinity”
Latest outbursts detected
February 1&2, 2019
ARABF 190202.710 152 outburst
CENNN 190201.542 142 outburst
CENV342 190202.511 150 outburst
HYACT 190201.503 161 outburst
HYAMM 190202.521 142 outburst
HYAV392 190201.551 148 outburst
LEOX 190201.560 132 outburst
LIBV362 190202.692 145 outburst
NORHP 190202.669 132 outburst
PICAR 190202.665 130 outburst
PUPCL 190202.640 143 outburst
PYXVZ 190201.493 131 outburst
SCOMM 190202.699 139 outburst
SERV386 190202.725 128 outburst
TRADV 190201.576 142 outburst
NSV 1440 190201.477 161 outburst
NSV 5031 190201.552 139 superoutburst
DDE 76 190201.574 157 outburst
The XMM-Newton space observatory will be observing the dwarf nova GW Librae on Aug.31 / Sept.1, 2017. The Space Telescope Science Institute (STScI) needs constant updates on the current state of GW Lib to make sure it is at a minimum. My latest observation sent at magnitude 16.5 shows it is around minimum.
GW Lib was discovered in 1983 as a 9th magnitude object. On April 12, 2007, I noticed GW Lib was rising to outburst, the first recorded outburst in 24 years since the discovery! GW Lib has had no further outbursts. My visual light curve of the 2007 outburst which lasted over 70 days. More here.
My paper was published with Peredur Williams, Institute for Astronomy, Royal Observatory, Edinburgh on ” Observation of a Deep Visual “Eclipse” in the WC9-Type Wolf-Rayet Star, WR 76 ” One of the deepest found so far in these types of stars. A real challenge visually as the eclipse is well below 17.0 magnitude.
My paper was published October 2016 with Mike Simonsen on UY Puppis – A New Anomalous Z Cam Type Dwarf Nova. UY Pup is now one of only four known anomalous Z Cam stars!
My paper published on the discovery of the first-ever recorded eclipse in the Wolf-Rayet star WR 53. After 5 years of constant monitoring, we now have a new variable star!
Wolf-Rayet Star WR 53 – Added to the International Variable Star Index July 2015.
My paper published on the first-ever standstill of OQ Carinae after 14 years of study.
Discovery story on OQ Carinae!
Amateur astronomers are making a unique contribution to science’s understanding of the universe, reports Marilyn Moore