AAVSO Alert Notice 741 announces a campaign on several Southern T Tauri stars in support of HST and TESS observations. Please see the notice for details and observing instructions.
There are threads for this campaign under the following forums:
- Campaigns and Observation Reports: https://www.aavso.org/hst-ulysses-southern-t-tauri-campaign-01
- Young Stellar Objects: https//www.aavso.org/hst-ulysses-southern-t-tauri-campaign
Please subscribe to these threads if you are participating in the campaign so you can be updated by the astronomer and by HQ. Join in the discussion or ask questions there!
The tables below contain the targets. They will be updated as HST times are added or revised, so please check them frequently! Also, be sure to read the Alert Notice to see Notes pertaining to these targets.
Table 1: Scheduled Southern Targets
****Note 5/25/21: The targets NSV 20468 (Sz 130) and NSV 20520 (Sz 111) have been scheduled for HST. They have been moved from Table 2 to Table 1.
Note: The HST dates for HM Lup and GQ Lup have been switched by HST. The revised dates are below.
| Primary Name | Alternate Name | RA (2000) | DEC (2000) | Range (VSX) | Mean V (not midpoint) | HST (2021 UT) | TESS (2021 UT) |
| CHX 18N | 2MASS J11114632-7620092 [Cha] | 11 11 46.34 | 76 20 08.9 | 11.76 - 12.82 V | 11.9 | Apr 29 14:30-23:37 | Apr 28-May 24 |
| HM Lup | Sz 72 | 15 47 50.63 | -35 28 35.4 | 14.45 - 14.95 V | 14.8 | May 4 11:30-23:00 | Apr 28-May 25 |
| GQ Lup | Sz 75 | 15 49 12.11 | -35 39 05.1 | 11.3 - 14.3 V | 11.4 | May 3 13:00-01:30 | Apr 28-May 25 |
| GW Lup | Sz 71 | 15 46 44.73 | -34 30 35.7 | 13.54 - 14.39 V | 13.5 | May 5 11:00-23:30 | Apr 28-May 25 |
| NSV 20416 | Sz 77 [Lup] | 15 51 46.96 | -35 56 44.1 | 12.2 - 13.7 V | 13.3 | May 7 10:30-22:30 | Apr 28-May 25 |
| Sz 76 | 2MASS J15493074-3549514 [Lup] | 15 49 30.74 | -35 49 51.4 | 15.1 (0.1) V | 15.2 | May 10 09:00-20:00 | Apr 28-May 25 |
| NSV 20359 | Sz 66 [Lup] | 15 39 28.28 | -34 46 18.1 | 15.3: - 15.7 V | 15.0 | May 24 03:30-16:00 | Apr 28-May 25 |
| NSV 18716 | Sz 45 [Cha] | 11 17 36.98 | -77 04 38.1 | 11.8: - 14.1V | 13.5 | May 25 03:00-14:00 | Apr 28-Jun 24 |
| XX Cha | 11 11 39.67 | -76 20 15.0 | 13.1 - 15.3 V | 15.3 | May 29/30 00:00-11:30 | Apr 28-Jun 24 | |
| GX Cha | Hn 5 | 11 06 41.79 | -76 35 49.1 | 15.8: - 17.2: V | 15.6 | May 31 00:00-09:30 | May 26-Jun 24 |
| IN Cha | 11 12 09.83 | -76 34 36.5 | 15.8 - 16.6 V | 16.5 | Jun 5/6 21:00-07:00 | May 26-Jun 24 | |
| T Cha | 11 57 13.52 | -79 21 31.5 | 10.09 - 14.5 V | 11 | ----- | Apr 28-Jun 24 | |
| NSV 20468 | Sz 130 [Lup] | 16 00 31.04 | -41 43 37.0 | 13.9 - 15.1 V | 14.7 | June 20 | May 26-Jun 24 |
| NSV 20520 | Sz 111 [Sco] | 16 08 54.68 | -39 37 43.1 | 14.1 - 14.6 V | 14.0 | June 20 | May 26-Jun 24 |
Table 2: Southern Targets - HST times to be scheduled (these targets will be moved to Table 1 as they are scheduled)
| Primary Name | Alternate Name | RA (2000) | DEC (2000) | Range (VSX) | Mean V (not midpoint) | HST (2021 UT) | TESS (2021 UT) |
| SZ Cha | 10 58 16.75 | -77 17 17.2 | 11.7 - 13.8 V | 12.7 | May-Jun | Apr 28-Jun 24 | |
| TW Cha | 10 59 01.06 | -77 22 40.9 | 12.3 - 14.0 V | 13.4 | late Apr-Jun | Apr 28-Jun 24 | |
| SSTc2d J160000.6-422158 | 2MASS J16000060-4221567 [Nor] | 16 00 00.60 | -42 21 56.8 | 16.4 - 16.7 V | 15.9 | Jun 19-23 | May 26-Jun 24 |
| RU Lup | 15 56 42.31 | -37 49 15.5 | 9.8 - 12.9 V | 10 | 10 Aug - 2 Sep | ----- |
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ
Is there still a need to continue observations of the stars in the list?
Regards,
Josch
HST is observing two targets from this campaign TONIGHT or TOMORROW. AAVSO Alert Notice 748 gives information for the two targets (NSV 20468 (= Sz 130) [Lup] and SSTc2d J160000.6-422158 [Nor]). Please see the notice for observing instructions.
Many thanks, and good observing,
Elizabeth O. Waagen, AAVSO HQ