AAVSO Alert Notice

Alert Notice 785: Monitoring of V452 Vul = HD 189733 requested (backup copy)

Notes: Please continue observations at least through the 2024 observing season.  -  Elizabeth O. Waagen, July 2, 2024

HST observations were postponed. Please continue to monitor V452 Vul as instructed below until further notice.  -  Elizabeth O. Waagen, October 25, 2022

July 5, 2022

Alert Notice 750: T CrB photometry and spectroscopy requested for HST and XMM-Newton observations (backup copy)

Note: Ongoing observations of T CrB are extremely important as the eruption predicted for 2024 draws closer. See HERE for more information.  -  Elizabeth O. Waagen, July 5, 2023, July 2, 2024

Please continue to monitor T CrB until further notice.  -  Elizabeth O Waagen, February 9, 2023

Alert Notice 752: Rare Outburst of Recurrent Nova RS Ophiuchi (backup copy)

Notes: Post-outburst observations continue to be valuable and of interest. Please continue to observe RS Oph.  -  Elizabeth O. Waagen, July 2, 2024, September 30, 2024

Please continue to observe RS Oph, although the 2021 outburst is over. It returned to a fainter magnitude than before the outburst, so ongoing follow-up observations will be very valuable.  -  Elizabeth O. Waagen, April 4, 2022

August 9, 2021