AAVSO Spectroscopy Database (AVSpec)

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

Satellite observations are being rescheduled; please continue to monitor T CrB until further notice.  -  Elizabeth O. Waagen, October 4, 2021

August 3, 2021

Alert Notice 742: V1405 Cas = N Cas 2021 brightening

Note: This nova continues to behave very unusually. Please continue to observe!  -  Elizabeth O. Waagen, July 6, 2021

V1405 Cas faded from its brightening and is now plateauing again around 7.8V. Please continue to observe this interesting nova!  -  Elizabeth O. Waagen, May 28, 2021
 

May 10, 2021

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):

Alert Notice 738: R Aqr monitoring needed in support of Chandra and HST observations

Note:  The minimum of R Aqr has passed; ongoing observations, especially in B and V, are essential. Please continue to observe R Aqr until further notice.  -  Elizabeth O. Waagen, July 5, 2022

The HST observations were successfully obtained. Please continue to observe R Aqr until further notice.  -  Elizabeth O. Waagen, July 6, 2021

The Chandra observations have been completed. The HST observations will take place 2021 May 13 10:57:01 - 18:08:28 UT.  -  Elizabeth O. Waagen, May 4, 2021