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.
April 9, 2013: In AAVSO Special Notice #346 (http://www.aavso.org/aavso-special-notice-346), IU Leo was said to have a close companion about 2 arcsec to the NE. This is not correct - it is IY UMa that has this close companion.
We extend sincere apologies to Dr. Szkody for misquoting her and to our readers for the error.
This AAVSO Special Notice was compiled by Elizabeth O. Waagen.
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March 25, 2013: Further to AAVSO Alert Notice 471 (http://www.aavso.org/aavso-alert-notice-471) and AAVSO Special Notice #342 (http://www.aavso.org/aavso-special-notice-342), HST/COS is scheduled to observe the eclipsing SU UMa-type dwarf nova IY UMa:
IY UMa 2013 March 29 23:43:52 through March 30 02:18:13 UT
March 18, 2013: Further to AAVSO Alert Notice 471 (http://www.aavso.org/aavso-alert-notice-471), HST/COS is scheduled to observe the SU UMa-type dwarf nova PU CMa:
PU CMa 2013 March 22 00:00:43 through 02:36:08 UT
The HST observations of PU UMa may be cancelled/postponed, as PU CMa is currently in outburst, according to observations reported to the AAVSO:
2013 March 17.02097 UT, 15.24 V +/-0.08, Shawn Dvorak, Clermont, FL;
