American Association of Variable Star Observers (AAVSO)
Tue, 09/14/2021 - 16:15

AAVSO Alert Notice 754 announces an observing campaign on 15 VY Scl-type CVs in support of HST Target of Opportunity observations. Please see the notice for targets, details, and observing instructions.

There are threads for this campaign under the following forums:

- Campaigns and Observing Reports:
- Cataclysmic Variables:
- Spectroscopy:

Please subscribe to these threads if you are participating in the campaign so you can be updated by the astronomers and by HQ. Join in the discussion or ask questions there!

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (Belgium) (VVS)
Uploaded first observations

I have uploaded the first observations of a part of the targets from the Southern hemisphere. Will continue as weather permits.


Dear All, 

A huge thanks in…

Dear All, 

A huge thanks in advance for your help with this campaign over the next three years!

Feel free to reach out to us at any moment, we are happy to answer any questions/doubts related to this project. We are also preparing a web page with detailed information on the HST program, I'll share it here once it's ready.

Good luck to you all with the observations :)