AAVSO Spectroscopy Database (AVSpec)

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

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

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

Note: Please continue to monitor these targets per the instructions below.  -  Elizabeth O. Waagen, October 31, 2022, August 6, 2024

September 14, 2021

Notes: LL Lyr was not observed in July 2024 due to technical issues with HST, but it may be observed in August so please continue observations. Also, CS Ind is planned to be observed in August 2024, so please observe it. More information on CS Ind's and LL Lyr's schedules will be issued when available. - Elizabeth O. Waagen, August 4, 2024

KZ Gem has been put on hold by HST, and likely won't be observed until next year, if at all.  -  Elizabeth O. Waagen, January 2, 2024

October 26, 2023