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dwarf nova

Special Notice #355: V1108 Her next HST COS target followed by BD Pav

May 31, 2013: Further to AAVSO Alert Notice 471 (http://www.aavso.org/aavso-alert-notice-471)and AAVSO Special Notice #354 (http://www.aavso.org/aavso-special-notice-354), HST/COS is scheduled to observe the WZ Sge-type cataclysmic variable V1108 Her:

V1108 Her  2013 June 6 09:32:19 through 13:42:14 UT

PLEASE NOTE THAT THE DATE HAS BEEN REVISED FROM SPECIAL NOTICE #354.

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 #343: GK Per outburst appears to be underway

March 18, 2013:  The old nova GK Per (N Per 1901), which has dwarf nova outbursts, appears to be going into outburst, according to observations submitted to the AAVSO International Database:

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