Note: Some of the targets below are being re-assessed for continued coverage. For the present, please continue to observe all targets. - Elizabeth O. Waagen, September 30, 2024
The Alert Notice text below has been revised from the original version issued April 18, 2024. - Elizabeth O. Waagen, April 19, 2024
Note: The Alert Notice text below has been revised from the original version issued April 18, 2024. - Elizabeth O. Waagen, April 19, 2024
Observers are also reminded that it is essential to use the comparison and check stars indicated for the photometry target. If they are too far apart to fit into the same field of view as the target, use PEP-style observing, that is, alternate images of variable, comp, and check.
April 22, 2024 REVISED VERSION
Note: The target table was edited to add the range. - Elizabeth O. Waagen, 18 June 2020
June 17, 2020
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/test-exposures-for-symbiotic-binary-candidates-campaign
Adrian B. Lucy (Columbia University) requests the assistance of AAVSO observers, and writes:
In the April 2014 Newsletter we published an article on variable stars with close companion causing problems with their photometry.
In this page we give more information and updated tables so you can be aware of the stars that are causing problems or have caused problems in the past.
We will be updating this information with more stars in the future.
If you find a problem similar to those described in the Newsletter article, please let us know.
