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IY UMa

Special Notice #347: Correction to AAVSO Special Notice #346

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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SUBMIT OBSERVATIONS TO THE AAVSO

Special Notice #344: IY UMa and MR UMa next HST/COS targets

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

Special Notice #342: PU CMa, then IY UMa and MR UMa next HST/COS targets

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:

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484