Outburst of the UGWZ star UZ Bootis

[PTS]

AAVSO Special Notice #367

Outburst of the UGWZ star UZ Bootis
July 26, 2013

Carey Chiselbrook (CCY; Georgia, United States) reports via the AAVSO
Forums that the WZ Sge-type variable UZ Bootis is in outburst. It was
observed visually at magnitude 12.8 on 2013 Jul 26 02:00 UT (JD
2456499.58194). The outburst was confirmed by Walter MacDonald (MDW;
Ontario, Canada) imaged the field and found UZ Boo at V=12.69 03:25 UT
(JD 2456499.6394). Observations of UZ Bootis -- both visual estimates
and CCD time series -- are encouraged throughout the outburst.

As was noted by Gary Poyner on the BAAVSS-alert mailing list, the last
outburst of UZ Boo was in 2003. That outburst showed multiple
rebrightenings, and observers should continue monitoring the star even
after it appears to decline for the first time because it may reappear
several times. CCD observers may use a V filter or perform unfiltered
photometry when the source becomes faint. The star should exhibit
superhumps, and observers should keep integration times as short as
possible to achieve good S/N (preferably > 20-30).

UZ Boo is located at the following (J2000) coordinates:

RA: 14:44:01.21 , Dec: +22:00:54.7


Please promptly report all observations to the AAVSO using the name
"UZ BOO".

This AAVSO Special Notice was prepared by M. Templeton.

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