15286( 2) - 10-Jul-2017 12:39:54 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15286 Version: 2 Check-in Time: 10-Jul-2017 12:39:54 STScI Edit Number: 0 Title Unobstructed Observations of the Intrinsic Lyman-alpha Emission of Low-mass Stars ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Adam Schneider Arizona State University Y CoI: Dr. Evgenya L. Shkolnik Arizona State University N CoI: R. O. Parke Loyd University of Colorado at Boulder N CoI: Dr. Travis Stuart Barman University of Arizona N ------------------------------------------------------------------------------------ Abstract Recent discoveries of potentially habitable planets around low-mass stars have highlighted the need for a comprehensive understanding of the radiation environments in which such planets reside. Of particular importance is knowledge of the FUV radiation, as low-mass stars are typically much more active than solar-type stars and the proximity of their habitable zones (HZs) can be one tenth the distance. Such radiation has the potential to strip away a planet's atmosphere and alter its photochemistry. The vast majority of the flux emitted by low-mass stars at FUV wavelengths occurs in the Lyman-alpha line at 1216 Angstroms. However, measuring a low-mass star's direct Lyman-alpha emission is almost always impossible because of the contaminating effects of interstellar hydrogen and geocoronal airglow. By focusing on two stars with very large radial velocities (>150 km/s), emission due to Lyman-alpha will be Doppler shifted away from the contaminating sources allowing for rare opportunities to measure the intrinsic Lyman-alpha emission for K and M stars. Such observations will be vital for empirically guiding UV upper-atmosphere models of low-mass stars and for informing us how accurate reconstructed Lyman-alpha emission and correlations from other UV diagnostic lines are for known planet hosts. We have identified the only K and M dwarfs for which a complete and accurate measurement of Lyman-alpha line profile is possible. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will use HST/STIS to observe unobstructed Lyman-alpha emission from two low-mass stars, Ross 825 (K3) and Ross 1044 (M2), with exceptionally large radial velocities (>150 km/s). For each target, we will first perform a STIS target acquisition sequence (ACQ/SEARCH and ACQ/IMAGE), which take # seconds. We will then use the STIS/G140M grating to observe the Lyman-alpha wavelength region with the 52" x 0.1" slit centered at 1222 Angstroms, settings used successfully in the past for K and M dwarfs. ------------------------------------------------------------------------------------ 15286( 2) - 10-Jul-2017 12:39:54 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ROSS-825 STAR, K V-IV RA=21H11M17.6566S +/- 0.000131", J2000 V = 11.92 NUV = 18.85 DEC=+33D31'29.69" +/- 0.000222" Reference Frame: ICRS Extended: NO Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015 0.04021988181642871 0.15915100000000001 0.01006 ------------------------------------------------------------------------------------------------------------------------------------ 2 ROSS-1044 STAR, M V-IV RA=15H03M23.6699S +/- 0.000277", J2000 V = 12.063 NUV = 21.59 DEC=+03D47'7.74" +/- 0.000253" Reference Frame: ICRS Extended: NO Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015 -0.05979713039165687 0.717 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 15286( 2) - 10-Jul-2017 12:39:54 - [ 3] Visit: 01 (Ross825-1) Visit Requirements: On Hold Comments: Additional Comments: 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 ROSS-825 STIS/CCD ACQ F25ND3 MIRROR 1 1.3 S (1.3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ROSS-825 STIS/CCD ACQ/PEA 0.2X0.05N MIRROR 1 2.0 S (2 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 1709 S -MAMA G (1709 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2988 S -MAMA G (2988 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2988 S -MAMA G (2988 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ROSS-825 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A ROSS-825 2 STIS/CCD ACQ/PEA 0.2X0.05 MIRROR none none none none 1 N/A K ND ROSS-825 3 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 1 N/A -MAMA G ROSS-825 4 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 2 N/A -MAMA G ROSS-825 5 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 3 N/A -MAMA G 15286( 2) - 10-Jul-2017 12:39:54 - [ 4] Visit: 02 (Ross825-2) Visit Requirements: On Hold Comments: Additional Comments: 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 ROSS-825 STIS/CCD ACQ F25ND3 MIRROR 1 1.3 S (1.3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ROSS-825 STIS/CCD ACQ/PEA 0.2X0.05N MIRROR 1 2.0 S (2 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 1709 S -MAMA G (1709 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2988 S -MAMA G (2988 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2988 S -MAMA G (2988 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ROSS-825 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A ROSS-825 2 STIS/CCD ACQ/PEA 0.2X0.05 MIRROR none none none none 1 N/A K ND ROSS-825 3 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 1 N/A -MAMA G ROSS-825 4 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 2 N/A -MAMA G ROSS-825 5 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 3 N/A -MAMA G 15286( 2) - 10-Jul-2017 12:39:54 - [ 5] Visit: 03 (Ross825-3) Visit Requirements: On Hold Comments: Additional Comments: 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 ROSS-825 STIS/CCD ACQ F25ND3 MIRROR 1 1.3 S (1.3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ROSS-825 STIS/CCD ACQ/PEA 0.2X0.05N MIRROR 1 2.0 S (2 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 1709 S -MAMA G (1709 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ROSS-825 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2988 S -MAMA G (2988 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ROSS-825 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A ROSS-825 2 STIS/CCD ACQ/PEA 0.2X0.05 MIRROR none none none none 1 N/A K ND ROSS-825 3 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 1 N/A -MAMA G ROSS-825 4 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 2 N/A -MAMA G 15286( 2) - 10-Jul-2017 12:39:54 - [ 6] Visit: 04 (Ross1044-1) Visit Requirements: On Hold Comments: Additional Comments: 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 ROSS-1044 STIS/CCD ACQ F25ND3 MIRROR 1 0.8 S (0.8 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ROSS-1044 STIS/CCD ACQ/PEA 0.2X0.05N MIRROR 1 2.0 S (2 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ROSS-1044 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 1673 S -MAMA G (1673 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ROSS-1044 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2950 S -MAMA G (2950 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 ROSS-1044 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2950 S -MAMA G (2950 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ROSS-1044 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A ROSS-1044 2 STIS/CCD ACQ/PEA 0.2X0.05 MIRROR none none none none 1 N/A K ND ROSS-1044 3 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 1 N/A -MAMA G ROSS-1044 4 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 2 N/A -MAMA G ROSS-1044 5 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 3 N/A -MAMA G 15286( 2) - 10-Jul-2017 12:39:54 - [ 7] Visit: 05 (Ross1044-2) Visit Requirements: On Hold Comments: Additional Comments: 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 ROSS-1044 STIS/CCD ACQ F25ND3 MIRROR 1 0.8 S (0.8 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ROSS-1044 STIS/CCD ACQ/PEA 0.2X0.05N MIRROR 1 2.0 S (2 K D S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ROSS-1044 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 1673 S -MAMA G (1673 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ROSS-1044 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2950 S -MAMA G (2950 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 ROSS-1044 STIS/FUV TIME-TA 52X0.1 G140M 1222 BUFFER-TIME=2000 1 2950 S -MAMA G (2950 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ROSS-1044 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A ROSS-1044 2 STIS/CCD ACQ/PEA 0.2X0.05 MIRROR none none none none 1 N/A K ND ROSS-1044 3 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 1 N/A -MAMA G ROSS-1044 4 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 2 N/A -MAMA G ROSS-1044 5 STIS/FUV TIME-TA 52X0.1 G140M 1222 none none none none 3 N/A -MAMA G 15286( 2) - 10-Jul-2017 12:39:54 - [ 8] Summary Form for Proposal 15286 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.05ND, 52X0.1, F25ND3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ, ACQ/PEAK, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=2000 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names ROSS-1044, ROSS-825 ------------------------------------------------------------------------------------------------------------------------------------