AAVSO Alert Notice
Alert Notice 859: Photometry and spectroscopy requested for bright binaries being observed with CHARA - Revised
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
Alert Notice 858: SS Cyg monitoring requested
April 2, 2024
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/ss-cyg-campaign-2024
- Cataclysmic Variables: https://www.aavso.org/ss-cyg-campaign-2024-01
Alert Notice 857: SDSS J080846.19+313106.0 being observed this week with HST
April 1, 2024
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observing Reports: https://www.aavso.org/hst-campaign-dwarf-novae-2023-2024
- Cataclysmic Variables: https://www.aavso.org/hst-campaign-dwarf-novae-2023-2024-01
Alert Notice 856: Nova in Ophiuchus: N Oph 2024 = V4370 Oph = TCP J17395720-2627410
March 14, 2024
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Time Sensitive Alerts: https://www.aavso.org/n-oph-2024-v-4370-oph-tcp-j-17395720-2627410
- Novae: https://www.aavso.org/node/90814
Alert Notice 855: V711 Tau monitoring requested in support of XRISM spectroscopy observations
February 29, 2024
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns & Observation Reports: https://www.aavso.org/v-711-tau-observing-campaign
Please subscribe to this thread if you are observing this star so you can be updated by the astronomers and by HQ. Join in the discussion or ask questions there!
Alert Notice 854 - AB Aur HST exact times schedule for March 04 and 05
Note: AB Aur was successfully observed with HST, and that phase of the campaign is over. Dr. Biddle requests that observers continue to observe AB Aur through the remainder of the 2024 observing season until it becomes too close to solar conjunction.
Alert Notice 853: Monitoring requested for AT 2000ch (LMi)
February 20, 2024
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns & Observation Reports: https://www.aavso.org/at-2000-ch-2024
- Cataclysmic Variables: https://www.aavso.org/at-2000-ch-2024-01
Alert Notice 852: AB Aur coverage needed now for HST observations this week
February 20, 2024
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns & Observation Reports: https://www.aavso.org/ab-aur-campaign-2023
- Young Stellar Objects: https://www.aavso.org/ab-aur-campaign-2023-01