AAVSO Alert Notice
Alert Notice 744: V1117 Her observations requested
June 8, 2021
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/fade-v1117-her (goes to YSO forum thread)
- Young Stellar Objects (YSO): https://www.aavso.org/fade-v1117-her
Alert Notice 743: V603 Aql photometry and spectroscopy requested
May 11, 2021
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/v603-aql-campaign
- Novae: https://www.aavso.org/v603-aql-campaign-01
- Spectroscopy: https://www.aavso.org/v603-aql-campaign-02
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 740: Nova in Scorpius: V1710 Sco = N Sco 2021 = ASASSN-21fh = PNV J17091000-3730500
April 14, 2021
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Time Sensitive Alerts: https://www.aavso.org/asassn-21fh-possible-nova-mag-104-scorpius-0
- Novae: https://www.aavso.org/asassn-21fh-possible-nova-mag-104-scorpius
Alert Notice 739: Nova in Sagittarius: N Sgr 2021 No. 2 = PNV J17581670-2914490 [V6595 Sgr]
Note: N Sgr 2021 No. 2 has been given the permanent GCVS name V6595 Sgr.
April 6, 2021
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Time Sensitive Alerts: https://www.aavso.org/pnv-j17581670-2914490-possible-nova-sagittarius
- Novae: https://www.aavso.org/n-sgr-2021-no-2-pnv-j17581670-2914490
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 737: HST observing schedule for TW Hya - final set of observations
April 2, 2021
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/hsttess-observations-tw-hya-37-42-2021-01
- Young Stellar Objects (YSO): https://www.aavso.org/hsttess-observations-tw-hya-37-42-2021
Alert Notice 736: Nova in Sagittarius: V6594 Sgr = N Sgr 2021 = TCP J18490521-1902054 = ASASSN-21eh
March 30, 2021
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Time Sensitive Alerts: https://www.aavso.org/tcp-j18490521-1902054-asassn-21eh-nova-sgr
- Novae: https://www.aavso.org/nova-sagittarii-2021-mag-10