Dwarf novae observations requested for VLA campaign

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Dwarf novae observations requested for VLA campaign

文章 PTS » 週三 02 3月, 2016 06:12

AAVSO Alert Notice 539
March 1, 2016

Dwarf novae observations requested for VLA campaign

Ms. Deanne Coppejans (PhD candidate, Radboud University Nijmegen
(Netherlands) and University of Cape Town) and colleagues have
requested AAVSO observer assistance in monitoring several northern
dwarf novae in support of their campaign to observe them with
the Very Large Array (VLA) in their ongoing radio jet research.
Their research on radio jets in dwarf novae has been discussed in
AAVSO Alert Notice 505 (https://www.aavso.org/aavso-alert-notice-505).

Observers are asked to keep an eye on RX And, U Gem, YZ Cnc,
SU UMa, and Z Cam over the next few months. High-cadence monitoring
is not needed; nightly observations are sufficient to determine
whether the source is in outburst or quiescence when a VLA
observation is taken. In this campaign, the VLA observations are not
triggered by the PI, so there is no way to predict when the VLA will
observe the sources. Observers will be notified whenever VLA
observations are obtained, but no modification of observing
instructions is expected.

Nightly visual or V observations are requested beginning now and
continuing through June 2016.

Coordinates (2000) and Ranges
Name R.A. Dec. Max Min Type
RX AND 01 04 35.52 +41 17 57.8 10.8 vis 15.5 vis ZCAM
U GEM 07 55 05.21 +22 00 04.8 8.9 vis 15.4 V UGSS
YZ CNC 08 10 56.65 +28 08 33.2 10.4 vis 15.7 V UGSU
SU UMA 08 12 28.28 +62 36 22.3 10.9 vis 14.9 vis UGSU
Z CAM 08 25 13.20 +73 06 39.2 10.4 vis 13.8 vis ZCAM

Charts with comparison stars for these stars may be created using
the AAVSO Variable Star Plotter (VSP, http://www.aavso.org/vsp).

Please report observations to the AAVSO International Database
using the names above.

An AAVSO observing campaign discussion thread on the topic "Northern
dwarf novae campaign" has been initiated under the Campaigns &
Observation Reports forum at

This campaign is being followed on the AAVSO Observing Campaigns
page at https://www.aavso.org/observing-campaigns.

This AAVSO Alert Notice was prepared by Elizabeth O. Waagen.


Information on submitting observations to the AAVSO may be found at:


An Alert Notice archive is available at the following URL:

Subscribing and Unsubscribing may be done at the following URL:
https://www.aavso.org/observation-notif ... ertnotices


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