AAVSO Spectroscopy Database (AVSpec)

Alert Notice 789: Photometry and spectroscopy requested for 9 TESS targets

August 22, 2022

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observing Reports: https://www.aavso.org/flare-stars-tess-campaign-2022-2023

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Alert Notice 779: Recurrent nova U Sco in surprise eruption needs long time series for the next month

Note: Please observe U Sco throughout the 2023 observing season.  -  Elizabeth O. Waagen, February 6, 2023

Please continue observations of U Sco through the end of the 2022 observing season and pick up again after conjunction.  -  Elizabeth O. Waagen, September 2, 2022

June 7, 2022

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