AAVSO Alert Notice

Alert Notice 842: AB Aur monitoring requested for HST observations

November 15, 2023
 
Notes: In the original version of this Alert Notice, the Rc magnitude of the CHECK star was in error. The correct Rc magnitude for the CHECK star is 11.382.  -  Elizabeth O. Waagen, December 12, 2023
 
A webinar on AB Aur and this campaign took place on November 19, 2023. See below under "What to Expect" for details.

Alert Notice 841: VY Scl coverage needed now for HST ToO observations

Notes: HST will not be able to observe VY Scl at this time, so the observations have been canceled. However, the data being obtained by you continue to be extremely valuable to the astronomers, and continuing coverage is requested until after VY Scl has returned to its bright state. Thank you!  -  Elizabeth O. Waagen, January 31, 2024

Alert Notice 839: BF Eri monitoring requested in support of HST observations this week

Note: HST was not able to observe BF Eri in November. It may be rescheduled for 2024 - stay tuned to the forums below for updates. An Alert Notice will also be sent when/if BF Eri is scheduled again.  -  Elizabeth O. Waagen, December 5, 2023

November 4, 2023

Alert Notice 837: Photometry of sigma Gem requested in support of TESS and CHARA observations

October 18, 2023

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
 - Campaigns and Observing Reports: https://www.aavso.org/sigma-gem-campaign

Please subscribe to this thread if you are participating in the campaign so you may be updated by the astronomer and by HQ. Join in the discussion or ask questions there!

Alert Notice 836: AAVSO and SNEWS partner in campaign to monitor bright supernova progenitors

October 13, 2023

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
 - Campaigns and Observing Reports: https://www.aavso.org/snews-campaign-forum

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