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TW Hya

Alert Notice 774: TW Hya being observed by HST now - observations needed

March 31, 2022

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observing Reports: https://www.aavso.org/odysseus-viii-southern-targets-marchapril-01
- Young Stellar Objects (YSO): https://www.aavso.org/odysseus-viii-southern-targets-marchapril

Tags
AAVSO Alert Notice
TW Hya
YSO
young stellar object
HST
AAVSO International Database

Alert Notice 770: 4 T Tau stars to be observed by HST - EL Cha observations needed urgently now

February 28, 2022

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observing Reports: https://www.aavso.org/odysseus-viii-southern-targets-marchapril-01
- Young Stellar Objects (YSO): https://www.aavso.org/odysseus-viii-southern-targets-marchapril

Tags
AAVSO Alert Notice
EL Cha
DI Cha
SY Cha
TW Hya
T Tau star
HST
AAVSO International Database

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

Tags
AAVSO Alert Notice
TW Hya
T Tau star
HST
AAVSO International Database

Alert Notice 731: Monitoring needed for TW Hya for HST and TESS observations

February 24, 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

Tags
AAVSO Alert Notice
TW Hya
T Tau variable
HST
TESS
AAVSO International Database

Special Notice #209: Nightly monitoring of TW Hya in support of HST observations

May 17, 2010: Dr. Michael Sitko (U. Cincinnati) requests observations of the young stellar object TW Hya in support of upcoming Hubble Space Telescope observations. TW Hya is believed to be a T Tauri star that varies between magnitudes 10.5 and 12.2. TW Hya will be observed with the HST STIS instrument as part of a larger program to study the properties of potentially planet-forming disks around young stars. The star will be observed in the ultraviolet to search for time-variability in the gas in the inner accretion disk.
Tags
TW Hya
HST
AAVSO Special Notice
AAVSO International Database
YSO
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