ULLYSES LOW-Z

Low-Metallicity Galaxy OB Stars

Observations of the six ULLYSES high-mass stars in the low-metallicity galaxies Sextans A and NGC 3109 will be obtained during HST cycles 27-29 with COS/G140L/800.

For each star, the table below gives the galaxy name; star designation; the target names as they appear in the MAST archive, with the name adopted by the ULLYSES team in bold; the stellar position (generally from Gaia DR2 or 2MASS); the adopted spectral type; V magnitude; and total E(B-V) (i.e., Galactic plus the external galaxy’s); and photometry for 5 WFC3 filters listed in units of STmag (errors are of order of 0.05-0.1mag). Three additional columns will be populated (when the information exists), giving the proposal ID, the science configuration (indicating which instruments and channels will be used), and the date of the first observation of that target. Further information about each visit can be found by clicking on the row for the target of interest. An additional table will appear that will contain the visit ID, the scheduling status of that visit, a more detailed science configuration (including grating and central wavelength), and the observation date for each visit.

Additional information is available in the .csv file available for download here.

Galaxy Star MAST Star Name RA(J2000) DEC(J2000) SpType V E(B-V) F225W F275W F336W F475W F814W Proposal ID Science Configuration First Observation Date
NGC3109 NGC-3109 EBU 07 NGC-3109-EBU-07 10h 02m 54.69s -26d 08m 59.64s B0-1Ia1 18.691 0.091 16.25 16.62 17.23 18.27 20.12 16511 COS/FUV Jun 16 2021
Proposal ID Visit ID Visit Status Science Configuration Observation Date
16511 1C Scheduled COS/FUV: G140L/800 Jun 16 2021
NGC3109 NGC-3109 EBU 20 NGC-3109-EBU-20 10h 03m 03.22s -26d 09m 21.41s O8I1 19.331 0.171 17.04 17.35 17.90 18.91 20.67 16511 COS/FUV Jun 15 2021
Proposal ID Visit ID Visit Status Science Configuration Observation Date
16511 2C Scheduled COS/FUV: G140L/800 Jun 15 2021
16511 3C Scheduled COS/FUV: G140L/800 Jun 18 2021
NGC3109 NGC 3109 EBU 34 NGC-3109-EBU-34 10h 03m 14.24s -26d 09m 16.96s O8I(f)1 19.611 0.11 16.99 17.40 18.03 19.16 21.07 16511 COS/FUV Jun 19 2021
Proposal ID Visit ID Visit Status Science Configuration Observation Date
16511 4C Scheduled COS/FUV: G140L/800 Jun 19 2021
Sextans A Sextans A GHF s4 SEXTANS-A-GHF-S4 10h 10m 57.89s -04d 43m 10.2s O6z2 20.92 0.052
Proposal ID Visit ID Visit Status Science Configuration Observation Date
Sextans A Sextans A GHF s2 SEXTANS-A-GHF-S2 10h 10m 58.59s -04d 43m 28.9s O3-5Vz2 20.82 0.222
Proposal ID Visit ID Visit Status Science Configuration Observation Date
Sextans A Sextans A GHF s8 SEXTANS-A-GHF-S8 10h 11m 05.69s -04d 42m 13.6s B0 I3 19.73 0.053
Proposal ID Visit ID Visit Status Science Configuration Observation Date

1 2007ApJ...659.1198E
2 2019MNRAS.484..422G
3 Garcia, priv. comm.

Last Updated: Jun 11, 2021

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