16808( 2) - 28-Feb-2022 18:03:00 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16808 Version: 2 Check-in Time: 28-Feb-2022 18:03:00 STScI Edit Number: 0 Title ULLYSES SMC O3 Dwarfs - COS ------------------------------------------------------------------------------------ Type Cycle GO/DD 29 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Julia Christine Roman-Duval Space Telescope Science Institute Y CoI: Dr. Kenneth Sembach Space Telescope Science Institute N CoI: Dr. TalaWanda R. Monroe Space Telescope Science Institute Y CoI: Joanna Taylor Space Telescope Science Institute N CoI: Dr. Travis C Fischer Space Telescope Science Institute - ESA N CoI: Dr. William J. Fischer Space Telescope Science Institute N CoI: Dr. Alexander W. Fullerton Space Telescope Science Institute Y CoI: Dr. Alessandra Aloisi Space Telescope Science Institute N CoI: Christopher Britt Space Telescope Science Institute N CoI: Dr. Thomas M. Brown Space Telescope Science Institute N CoI: Ivo Busko Space Telescope Science Institute N CoI: Dr. Joleen Carlberg Space Telescope Science Institute N CoI: Dr. Gisella De Rosa Space Telescope Science Institute N CoI: Elaine M Frazer Space Telescope Science Institute N CoI: Dr. Svea S Hernandez Space Telescope Science Institute - ESA - N JWST CoI: Dr. Alec S. Hirschauer Space Telescope Science Institute N CoI: Dr. Bethan Lesley James Space Telescope Science Institute - ESA - N JWST CoI: Robert Jedrzejewski Space Telescope Science Institute N CoI: Sean Lockwood Space Telescope Science Institute N CoI: Dr. Cristina Oliveira Space Telescope Science Institute N CoI: Rachel Plesha Space Telescope Science Institute N CoI: Dr. Charles R. Proffitt Space Telescope Science Institute N CoI: Dr. I. Neill Reid Space Telescope Science Institute N CoI: Dr. Adric R. Riedel Space Telescope Science Institute N CoI: Allyssa Riley Space Telescope Science Institute N CoI: Dr. David J. Sahnow Space Telescope Science Institute N CoI: Dr. Ravi Sankrit Space Telescope Science Institute Y CoI: Dr. Richard Shaw Space Telescope Science Institute N CoI: Dr. Linda J. Smith Space Telescope Science Institute N CoI: Dr. Sangmo Tony Sohn Space Telescope Science Institute N CoI: Dr. Debopam Som Space Telescope Science Institute N CoI: Dr. Leonardo Ubeda Space Telescope Science Institute N CoI: Dr. Daniel E. Welty Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract The Space Telescope Science Institute (STScI) Director has decided to devote up to 1000 orbits of Director's Discretionary time in observing Cycles 27-29 to a new Hubble Ultraviolet Legacy program focused on star formation and associated stellar physics. This new program, ULLYSES (UV Legacy Library of Young Stars as Essential Standards), will provide a UV spectroscopic reference sample of young (< 10 Myr) 16808( 2) - 28-Feb-2022 18:03:00 - [ 2] high- and low-mass stars. It will target over ~150 OB stars in the Magellanic Clouds and lower metallicity galaxies in the Local Group, and ~40 T Tauri stars and brown dwarfs in the Milky Way. In addition, ULLYSES will monitor 4 typical T Tauri stars over different rotational phases through at least three rotation periods, and over timescales of months to years. The resulting library will provide template spectra of massive stars at metallicities substantially below the well studied, while the low mass sample will cover a wide range of ages, accretion rates, and masses, including objects down to well below 0.5 M_sun. The legacy of this large UV dataset on the first 10 Myr of stellar evolution will be enhanced by complementary datasets obtained by the scientific community. In addition to the core goals of the program related to stellar astrophysics of low and high mass stars, this data will also enable exciting science in the fields of ISM, CGM, jets, and exoplanets. ULLYSES will be modeled after the Frontier Fields program: all data obtained will be non-proprietary. The implementation team at STScI is developing high-level science data products and a sophisticated database and website for disseminating data from the ULLYSES program and ancillary datasets for the ULLYSES target sample from space and ground-based facilities. ------------------------------------------------------------------------------------ Observations Description ------------------------ This proposal includes a subset of the massive ULLYSES stars being observed in the Magellanic clouds. Depending on target brightness, the main FUV spectral range will generally use either the STIS E140M setting or the combination of the COS c1291 + c1611 settings. Sufficiently bright stars without good FUSE data in the archive will also be observed with the COS c1096 setting to provide coverage at shorter wavelengths. Where time permits, stars of type O9 or later will also be observed with STIS E230M/1978, while for supergiants of spectral type B5 or later E230M/2707 may also be included. Where possible, targets of a given spectral type were selected to span both a range in extinction and in rotation rates to support a variety of stellar and ISM studies. Signal-to-noise requirements used to determine the desired exposures times were defined as follows: COS/G130M/c1096: 20 / nine-pixel resel at 1080 A COS/G130M/c1291: 30 / six-pixel resel at 1150 A COS/G160M/c1611: 30 / six-pixel resel at 1590 A COS/G185M/c1953: 30 / three-pixel resel at 1860 A COS/G185M/c1986: 30 / three-pixel resel at 1980 A STIS/E140M/c1425: 20 / two-pixel resel at 1200 A STIS/E230M/c1978: 20 / two-pixel resel at 1800 A STIS/E230M/c2707: 20 / two-pixel resel at 2800 A The actual implemented exposure times may be adjusted to efficiently use HST orbits, but should always provide at least 80% of the desired time as defined by the above requirements. Additional details about the scientific motivation and technical implementation strategy of the ULLYSES observations can be found at http://www.stsci.edu/stsci-research/research-topics-and-programs/ullyses. The ULLYSES program is based on the recommendations of a working group led by Sally Oey; the full text of that group's report can be found at 16808( 2) - 28-Feb-2022 18:03:00 - [ 3] http://www.stsci.edu/files/live/sites/www/files/home/stsci-research/research-to pics-and-programs/ullyses/_documents/HSTUV-report-ULLYSES.pdf. ------------------------------------------------------------------------------------ 16808( 2) - 28-Feb-2022 18:03:00 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SK183 STAR, MAIN SEQUENCE O, RA=01H29M24.5483S +/- 0", J2000 V = 13.82 SpT=O3 V((f*))z; E(B-V)=0.05; OF DEC=-73D33'16.34" +/- 0" U=12.51; B=13.59; V=13.82; F1160=1.030e-12; F1360=5.720e-13; F1700=3.650e-13 Reference Frame: ICRS Extended: NO Comments: SK183 : SMCSGS-FS-231, SK 183 Previous name : [SMCSGS-FS]-231 Input file: ULLYSES_Cycle29_MassiveStar_ProgramInput_v5.csv SpT = O3 V((f*))z Note: Some exptime deducted due to outside program(s). COS/G130M/c1096 : rn(PoWR-OB-new(PoWR_46000_4.00_m6.74_Z0.14.fits, smc-ob-i 46-40, Z=0.140 solar, Teff=46000, log_lum=5.78, log_g=4.00, log_mdot=-6.74) (extinction smcbar=0.050), flux1160 +- 2.0A flux=1e-12 Flam) Coordinate pedigree: Gaia DR2 Calculation performed 2021-10-25T00:54:31, v0.9 ----------------------------------------------------------- -------------------- tstatus; SK183; P/COS ready for internal review; S/ins not started; P/RS 18/02/22; S/xx DD/MM/YY tcheck; APT/SIMBAD target names: ; SK183 'SK 183' tcheck; Target info verification status?; ok tcheck; Coordinates & P.M. verified, epoch checked?; yes tcheck; Adopted SED compared to Observations?; yes ... one IUE SWP observation closely matches PoWR SED SK183_COS_G130M_c1096_sed.fits but STIS and two other SWP observations match each other but are about 20% lower than the model SED ... therefore we scale the original SED by 0.8 which we name SK183_new_c1096_scaleflux_0pt8_sed.fits and use that for confirming signal to noise ... The original model was used for BOT clearance (cos.sp.1682711). Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 2.1099540493449775E-4 -0.001351 0 ------------------------------------------------------------------------------------------------------------------------------------ 16808( 2) - 28-Feb-2022 18:03:00 - [ 5] Visit: 1C (SK183-COS) Visit Requirements: SCHED 100% On Hold Comments: Additional Comments: vstatus; 1C; SK183; P/COS approved for submission; P/RS 18/02/22 ; intrev: complete ; P/AF 24/02/22 vcheck; Enter targ name & Inst. & Resp. Sci.; SK183 ; COS ; RS vcheck; ETC numbers entered in APT?; yes vcheck; Any screening violations?; no ... warning for variable sources which is not relevant here vcheck; S/N ETC calcs done & documented?; yes vcheck; Field images checked & saved?; yes vcheck; Selected ACQ strategy?; yes ... NUV Imaging ACQ MIRROR A BOA the exposure time was calculated for the normalized spectrum and with S/N increased to 45 in order to ensure sufficient time for acquisition vcheck; Possible ACQ or Sci spoilers?; no vcheck; Field BOT clear?; yes ... GALEX throws warning for BOA in the science exposure but that is due to extended diffuse gas from nearby cluster of stars while O5V is assumed vcheck; Visual BOT check for stars not in catalog?; ok ... two bright stars beyond the PSA radius for BOA acquisition are B1.5IV and B2V (Ramachandran et al 2019) with V=15.41 and 15.85 (Massey et al 2002) vcheck; Orbit packing finalized?; yes vcheck; Buffer times optimized?; yes vcheck; Verify visit grouping correct; N/A vcheck; Is visit ready for int. review?; yes Allocated COS orbits = 1 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SK183 COS/NUV ACQ/IMA BOA MIRRORA 1 10.0 S (10 GE S) Comments: Exposure time calculated for S/N=45 in case target is slightly fainter than expected. ------------------------------------------------------------------------------------------------------------------------------------ 16808( 2) - 28-Feb-2022 18:03:00 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 2 SK183 COS/FUV TIME-TA PSA G130M 1096 BUFFER-TIME=162.0, FP-POS=ALL 1 434 S G (1736 S) Comments: rn(PoWR-OB-new(PoWR_46000_4.00_m6.74_Z0.14.fi ts, smc-ob-i 46-40, Z=0.140 solar, Teff=46000, log_lum=5.78, log_g=4.00, log_mdot=-6.74) (extinction smcbar=0.050), flux1160 +- 2.0A flux=1e-12 Flam); cos, fuv, g130m, c1096, psa, mjd#59670; fp-pos=None, segment=None) From file ULLYSES_Cycle29_MassiveStar_ProgramInput_v5.c sv Spectral type: O3 V((f*))z SED = SK183_COS_G130M_c1096_sed.fits For exptime=1708.8 s, spectral region: 1080.0 +- 0.5 A achieves SNR=20.0/resel global countrate (brightest segment): 10975.8 cts/s/segment brightest pixel: 0.208 cts/s/pix at 1225.5 A Calculation performed 2021-10-25T00:54:37, v0.9 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ SK183 1 COS/NUV ACQ/IMA BOA MIRRORA none none none none 1 N/A GE SK183 2 COS/FUV TIME-TA PSA G130M 1096 none none none 1 1 N/A G SK183 2 COS/FUV TIME-TA PSA G130M 1096 none none none 2 1 N/A G SK183 2 COS/FUV TIME-TA PSA G130M 1096 none none none 3 1 N/A G SK183 2 COS/FUV TIME-TA PSA G130M 1096 none none none 4 1 N/A G 16808( 2) - 28-Feb-2022 18:03:00 - [ 7] Summary Form for Proposal 16808 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures BOA, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=162.0, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names SK183 ------------------------------------------------------------------------------------------------------------------------------------