AAVSO International Database

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 741: Southern T Tau Stars campaign in support of HST and TESS observations

Note:  HST will be observing Sz 76 again on August 8  from 11:27:38 through 18:56:12 UT. Please add this target to your observing queue if practical. Dr. Walter remarks that there will be no TESS data, so frequent (at least nightly) BVRI observations will be helpful for setting the context for the HST spectra.  -  Elizabeth O. Waagen, August 2, 2021

 

The HST observations of NSV 20468 (Sz 130) and SSTc2d J160000.6-422158 have been scheduled as follows:

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

Alert Notice 734: HM Sge monitoring needed for HST and SOFIA observations

Note: Please continue observing HM Sge until further notice.  -  Elizabeth O. Waagen, May 2, 2022

SOFIA observations are planned in 2021 for June/July and November/December, so please continue to observe HM Sge throughout the observing season.  -  Elizabeth O. Waagen, May 3, 2021

March 15, 2021