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WZ Sge star

Alert Notice 714: TCP J21040470+4631129 to be observed with HST

Note: The HST observations of TCP-J21040470+4631129 have been scheduled for

Sep 12, 2020 07:16:37 to 13:07:28 UT

For the HST observations to take place, it is essential to have a positive observation 24 hours before this time showing the system in quiescence, so the night of September 10-11 UT is crucial.  -  Elizabeth O. Waagen, 31 August 2020

August 6, 2020

Alert Notice 614 : Monitoring of GW Lib to support XMM-Newton observation

February 12, 2018: Dr. Koji Mukai (NASA Goddard Space Flight Center) and colleagues have requested AAVSO observations of the WZ Sge type dwarf nova GW Lib in support of observations with the ESA XMM-Newton spaceobservatory scheduled for

2018 February 17  05:46:41 - 21:36:41 UT

Alert Notice 165: Rare outburst of 0846+58 BZ Ursae Majoris

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
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AAVSO ALERT NOTICE 165 (October 26, 1992)

RARE OUTBURST OF 0846+58 BZ URSAE MAJORIS

Special Notice #390: New possible WZ Sge variable ASASSN-14jv

November 10, 2014: Astronomer's Telegram (ATel) #6676 (B.J. Shappee et al. 2014) notes the discovery of ASASSN-14jv, a bright optical transient found at V=11.3 on 2014 November 9.19 (JD 2456970.69). This object is suspected to be a cataclysmic variable of the WZ Sge subtype. Shappee et al. note that the source is less than one arcsecond away from a g=19.1 magnitude source in the Kepler Input Catalog, suggesting a large amplitude typical of UGWZ stars.

Special Notice #14: BZ UMa Outburst

June 22, 2006: Based on the following observations, BZ UMa appears to be in outburst:

JUN 22.1986 V 11.36 +/- 0.02 GKA

JUN 22.8854 Unf. 11.5 (rough) VMT

Thanks to Keith Graham (GKA) for discovering the outburst, Tonny Vanmunster (VMT) for confirming it and Eddy Muyllaert (MUY) for bringing it to our attention.

Special Notice #377: Reported outburst of the WZ Sge star AL Comae

December 6, 2013: Observer Carlo Gualdoni reports via the cvnet-outburst mailing list that the WZ Sge-type dwarf nova AL Comae is in outburst, with a magnitude of V=12.74 on 2013 December 6.185 (JD 2456633.1185).  Gary Poyner notes on the BAAVSS mailing list that this is the first observed outburst of AL Com since October 2007.  Both visual observations and CCD time series are encouraged.

Alert Notice 349: Outburst of GW Lib

April 12, 2007

SUBJECT: OUTBURST OF THE CATACLYSMIC VARIABLE 1514-24 GW LIB

Object: 1514-24 GW LIB

Coordinates: R.A. 15h 19m 55.5s Dec. -25o 00' 25" (2000.0)

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