February 15, 2017: Dr. Elmé Breedt (University of Warwick) has requested AAVSO observers' assistance in monitoring the eclipsing cataclysmic variable 1SWASP J162117.36+441254.2 (=CSS_J162117.4+441254) beginning now in support of observations scheduled with the Hubble Space Telescope for late February - early March.
December 12, 2016: Roque Ruiz-Carmona (Ph.D. candidate, Institute of Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, The Netherlands) has requested AAVSO assistance with his campaign to observe a set of 21 cataclysmic variables (CVs) with the William Herschel Telescope (WHT) at La Palma on 2016 December 16.
November 9, 2016: Further to AAVSO Alert Notice 545, time series observations of the intermediate polar cataclysmic variable FO Aqr are requested to provide simultaneous coverage of XMM-Newton observations scheduled for 2016 November 13 19:43 UTC to November 14 8:13 UTC.
Note added September 27, 2016: Dr. Reynolds adds the following: "Visual observations would be useful in setting a baseline and understanding how variable the source is in a relative sense at the time of our HST observation."
September 20, 2016: Dr. Mark Reynolds (University of Michigan) and colleagues have requested AAVSO assistance in monitoring the cataclysmic variable GDS_J1701281-430612 in support of HST/COS observations scheduled for early October.
July 13, 2016: Dr. Colin Littlefield (University of Notre Dame) and colleagues Drs. Peter Garnavich (Notre Dame), Erin Aadland (Minnesota State), and Mark Kennedy (University College Cork) have requested AAVSO assistance in monitoring the intermediate polar cataclysmic variable FO Aqr beginning immediately.
Dr. Littlefield, who with his colleagues recently published ATel #9216 and #9225, writes:
Rod Stubbings reports via Daisaku Nogami/VSNET that the cataclysmic variable GW Lib is currently in outburst, at a visual magnitude of 13.8. Follow-up observations are urgently requested. The object is located at
Recent observations of the old nova intermediate polar magnetic catclysmic variable GK Per (Nova Per 1901) show the star brighter than minimum. However, it is too early to tell if an outburst is underway.
May 25, 2016: Roque Ruiz-Carmona, the principal investigator on the observing campaign on 20 CVs that was announced in AAVSO Alert Notice 543, reports that the campaign has been revised due to telescope issues. He writes: