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 between epoch 73 and 78. AR Pav has a period of 604.5 days
22″ f/3.8 Telescope “Infinity”
Latest outbursts detected
June 22, 2019
CARV436 190621.430 146 outburst
CENV342 190621.428 160 outburst
CMISV 190621.350 132 outburst
HYAV392 190621.425 143 outburst
HYIVW 190621.416 130 outburst
INDTU 190621.440 143 outburst
INDCS 190621.435 128 outburst
NORHP 190621.362 138 outburst
OPHV699 190621.410 149 outburst
PAVAS 190621.407 152 outburst
PAVGS 190621.435 148 outburst
PAVV344 190621.404 150 superoutburst
PUPUY 190621.349 145 outburst
PUPCL 190621.353 140 outburst
SCOV893 190621.377 120 outburst
SERRY 190621.440 149 outburst
SERUZ 190621.438 132 outburst
SGRV730 190621.436 146 outburst
SGRV1089 190621.437 152 outburst
TELKK 190621.441 138 outburst
VIRTW 190621.426 128 outburst
CTCV J1940-4724 190621.442 144 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!
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