Will Fischer ODYSSEUS Meeting Nov 11 2021 Survey Stars Observed to Date Fall 2020 13 stars observed in Orion OB1 and σ Ori SpringSummer 2021 18 stars observed Star Region ECha J084427833 ID: 930325
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Slide1
ULLYSES Program Update
Charting Young Stars’ Ultraviolet Light with Hubble
Will Fischer
ODYSSEUS Meeting– Nov 11 2021
Slide2Survey Stars Observed to Date
Fall 2020: 13 stars observed in Orion OB1 and
σ
OriSpring/Summer 2021: 18 stars observed
StarRegionECha J0844.2-7833η Cha2MASS J11432669-7804454Cha ICHX 18NCha IHn 5Cha IIN ChaCha ISz 10Cha ISz 45Cha IXX ChaCha I
StarRegionSSTc2d J160000.6-422158LupusSz 66LupusSz 69LupusSz 71LupusSz 72LupusSz 75LupusSz 76LupusSz 77LupusSz 111LupusSz 130Lupus
Observations were coordinated with TESS when possible
HST had high failure rates during much of the spring and summer, so several stars were repeated. The entire COS+STIS sequence was repeated if any individual visit failed, so there’s unexpected time coverage in some cases.
SSTc2d J161344.1-373646 was planned during the June-July HST downtime and never rescheduled; may be attempted in 2022
Slide3Winter 2021-22 Survey Stars
Phase IIs have been implemented and observations are being scheduled
Windows reflect ground-based availability
Star
RegionWindowNoteRX J0438.6+1546Taurus10 Nov – 21 DecWTTSV505 Oriσ Ori13 Nov – 16 JanRepeat of low S/N Fall 2020 targetRECX 5η Cha28 Dec – 20 MarRECX 6η Cha28 Dec – 20 Mar
WTTSRECX 9η Cha29 Dec – 20 MarSY ChaCha I23 Jan – 6 MaySz 19Cha I24 Jan – 11 MayVZ ChaCha I24 Jan – 14 MayWZ ChaCha I24 Jan – 14 MayHD 104237Eε Cha5 Feb – 23 May
Windows really open once COS and STIS are back up
Slide4Spring/Summer 2022 Survey Stars
Phase IIs are being implemented; consider these more tentative
These are expected to be the last survey stars
Star
RegionRX J1556.1-3655LupusSSTc2d J161243.8-381503LupusSz 82LupusSz 84LupusSz 97
LupusSz 98LupusSz 99LupusSz 100LupusSz 103LupusStarRegionSz 104LupusSz 110Lupus
Sz
114
Lupus
Sz
115
Lupus
Sz
117
Lupus
Sz 129LupusRX J1842.9-3532Corona AustralisRX J1852.3-3700Corona Australis
Observing Windows
Lupus: 26 Mar – 29 Jul
Corona Australis: 1 May – 4 Sep
Slide5Monitoring stars
Goal: 12 visits over 3 consecutive rotations
Last 5 GM
Aur
visits were lost due to ongoing HST downtimeInstruments are being brought back up one by one; ACS is already operational5 new GM Aur visits will run once COS is back up; tentatively planned to start between Dec 4 and Dec 10 and occur about once per dayEpoch 1 (2021)DatesCoordinationGood VisitsTW Hya29 Mar – 8 AprTESS, Chandra11 of 12RU Lup10 Aug – 21 AugXMM10 of 12BP Tau20 Aug – 12 SepXMM12 of 12GM Aur13 Oct – 30 Oct
TESS7 of 12Epoch 2 (2022)Approx. DatesTW Hya7 Mar – 16 AprRU Lup10 Aug – 28 SepBP Tau10 Aug – 18 SepGM Aur6 Sep – 5 Nov