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Special Notice #423: RX And observations needed urgently now

October 11, 2016: Further to AAVSO Alert Notice 549, observations of the dwarf nova RX And are urgently requested immediately. The system *may* be going into outburst, and confirmation is essential in order to know whether to trigger ToO observations with Chandra and other instrumentation.

Dr. Christian Knigge (University of Southampton) and colleagues need to catch RX And as early in this outburst as possible. It would be the first narrow outburst following a wide outburst, so would meet their criteria for ToO observations.

Please observe RX And as soon just as soon as it is in your viewing reach and report your observations immediately to the AAVSO using WebObs.

Coordinates (2000.0):  R.A. 01 04 35.52  Dec. +41 17 57.8

Charts: Charts with a comparison star sequence for RX And may be created using the AAVSO Variable Star Plotter (VSP).

Please submit observations to the AAVSO International Database using the name RX AND.

This campaign is being monitored on the AAVSO Observing Campaigns webpage at and is being followed on the Campaigns and Observation Reports Forum at

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


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