AAVSO Spectroscopy Database (AVSpec)

Alert Notice 758: Monitoring requested for 11 dwarf novae in support of HST observations in 2021-2022

Note:  RY Ser was scheduled for May and for June but was in outburst or too close to outburst to be a safe target. It may be rescheduled. GP Com observations did take place.  -  Elizabeth O. Waagen, July 5, 2022

GP Com observations will take place April 29-30, 2022; coverage is needed until May 20. See Alert Notice 775.  -  Elizabeth O. Waagen, April 27, 2022

Alert Notice 752: Rare Outburst of Recurrent Nova RS Ophiuchi

Note: 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

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

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

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