Special Notice #391: Targets Remaining in Northern Dwarf Novae Campaign

December 2, 2014: AAVSO Alert Notice 505 (http://www.aavso.org/aavso-alert-notice-505) announced the campaign on several northern dwarf novae by Deanne Coppejans and colleagues. This campaign, searching for radio jets in dwarf novae, has been moving very quickly! Thanks to your observations and timely notifications, three of the five sets of VLA observations available for the targets have been used on Z Cam, RX And, and YZ Cnc. The PI is extremely appreciative and thanks you all for your excellent work. She is presently analyzing the VLA data on these stars.

The two remaining sets of observations are being reserved for U Gem in outburst and SU UMa in superoutburst. Please concentrate your campaign efforts on these two targets.

Please observe these systems NIGHTLY and report all observations as soon as possible. In the event of an outburst, please report your observations as quickly as you can via WebObs, and also notify Dr. Matthew Templeton and Elizabeth Waagen at AAVSO Headquarters and Deanne Coppejans (matthewt@aavso.org, eowaagen@aavso.org, d.coppejans@astro.ru.nl). Please also post outburst detections to the Campaigns and Observation Reports forum (http://www.aavso.org/forums/variable-star-observing/campaigns-observation-reports).

Visual magnitude estimates are a fast and effective means of monitoring these dwarf novae. CCD observations are also useful; time series are not required. Please reduce your frames and report your data as soon as possible following an observing run.

Coordinates (2000) and Range
Name     R.A.               Dec.              Max            Min        Type     Date last outburst 2014
U Gem    07 55 05.21  +22 00 04.8    8.9    vis    15.4 V     UGSS   May 22 (2456799)
SU UMa   08 12 28.28  +62 36 22.3    10.9 vis    14.9 vis   UGSU   Jul 02 (2456840)

Finder charts with sequences for U Gem and SU UMa may be created using the AAVSO Variable Star Plotter (VSP, http://www.aavso.org/vsp).

Please report your observations to the AAVSO International Database using the names U GEM and SU UMA.

Thank you for your continued efforts on behalf of this campaign - your observations and swift notifications are crucial to its success!

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.


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