CH UMa

Alert Notice 758: Monitoring requested for 11 dwarf novae in support of HST observations in 2021-2022

Note: GP Com is being observed with HST on January 21, 2022.   YZ LMi observations are no longer needed.  -  Elizabeth O. Waagen, January 3, 2022

YZ LMi is to be observed with HST on December 30, 2021. CH UMa observations are no longer needed.  -  Elizabeth O. Waagen,  December 21, 2021

October 26, 2021

Alert Notice 210: 1147+49 BC Ursae Majoris in outburst AND Reminders on 0409-71 VW Hydri and 2138+43 SS Cygni AND Current activity on some cataclysmic variables

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
INTERNET: aavso@aavso.org
Tel. 617-354-0484 FAX 617-354-0665

AAVSO ALERT NOTICE 210 (July 7,1995)

1147+49 BC URSAE MAJORIS IN OUTBURST

The dwarf nova-type cataclysmic variable (SU UMa subclass) BC UMa is undergoing an
outburst, as indicated by the following observations: