Targets Remaining in Northern Dwarf Novae Campaign

PTS

AAVSO Special Notice #391

December 2, 2014

Targets Remaining in Northern Dwarf Novae Campaign

AAVSO Alert Notice 505 (http://www.aavso.org/aavso-alert-notice-505)

announced the campaign on several northern dwarf novae byDeanne Coppejans and colleagues. This campaign, searching for radio jets indwarf novae, has been moving very quickly! Thanks to your observations andtimely notifications, three of the five sets of VLA observations available forthe targets have been used on Z Cam, RX And, and YZ Cnc. The PI is extremelyappreciative and thanks you all for your excellent work. She is presentlyanalyzing the VLA data on these stars.

The two remaining sets of observations are being reservedfor U Gem in outburst and SU UMa in superoutburst. Please concentrate yourcampaign efforts on these two targets.

Please observe these systems NIGHTLY and report allobservations as soon as possible. In the event of an outburst, please reportyour observations as quickly as you can via WebObs, and also notify Dr. MatthewTempleton and Elizabeth Waagen at AAVSO Headquarters and Deanne Coppejans ([email protected], [email protected], [email protected]). Please alsopost 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 meansof monitoring these dwarf novae. CCD observations are also useful; time seriesare not required. Please reduce your frames and report your data as soon aspossible following an observing run.

Coordinates (2000) and Range

Name     R.A.         Dec.                    Max                                     Min        Type  Date last outburst 2014

U Gem    07 5505.21  +22 00 04.8              8.9         vis                         15.4 V     UGSS  May 22 (2456799)

SU UMa   08 1228.28  +62 36 22.3             10.9 vis 14.9vis   UGSU   Jul 02 (2456840)

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

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

Thank you for your continued efforts on behalf of thiscampaign - your observations and swift notifications are crucial to itssuccess!

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

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