15396( 4) - 17-Oct-2017 15:41:19 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15396 Version: 4 Check-in Time: 17-Oct-2017 15:41:19 STScI Edit Number: 1 Title Observing the beta Pic Hill Sphere Transit in the far-UV ------------------------------------------------------------------------------------ Type Cycle GO/DD 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Paul A. Wilson Universiteit Leiden Y CoI: Dr. Alain Lecavelier des Etangs CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Alfred Vidal-Madjar CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Carlo F. Manara European Southern Observatory - Germany N CoI: Dr. Ernst de Mooij Dublin City University N CoI: Mr. Jason J. Wang University of California - Berkeley N CoI: Dr. Flavien Kiefer CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Paul George Kalas University of California - Berkeley N CoI: Dr. Ignas Snellen Universiteit Leiden N ------------------------------------------------------------------------------------ Abstract The Hill sphere of the directly-imaged planet Beta Pic b is currently transiting its host-star, Beta Pic. During this event, material in the Hill sphere (e.g. left-over debris from planet formation, rings, gas torus around satellites, etc.) could transit the star. With the Cycle 24 HST/COS observations of the first half of the Hill sphere transit from April to August 2017, we detected a significant flux decrease in the blue and red wings of the HI Ly-alpha emission line and the 1334.53 CII absorption line. This is consistent with the first ever detection of an extended envelope of hydrogen and carbon surrounding Beta Pic b. We propose to monitor the second half of the Hill sphere transit, which will take place in October-November 2017, using the same instrument setup and observation strategy. As with the previous 2017 observations, we will again use the "Airglow Virtual Motion" technique, which is an extremely powerful technique to observe Lyman-alpha with COS. This is a very unique opportunity to monitor the transit of the environment of a ~20 million years old young planet that has been directly imaged orbiting a 4th magnitude star; the next such transit will not happen again for another 20 years. The aims for this proposal are to 1) probe the shape and the dynamics of the gas in the Hill sphere 2) continue to probe the composition of the gas in the Hill sphere, and 3) Track the compositional variations as a function of Hill sphere radius. ------------------------------------------------------------------------------------ Observations Description ------------------------ We have a total of two visits scheduled. Each visit consists of three orbits. Each visit has an identical observing strategy. For each visit: Orbit 1: Observe target centered in the aperture Orbit 2: The target (Beta Pictoris) is to be offset -1.1 arcseconds in the dispersion direction 15396( 4) - 17-Oct-2017 15:41:19 - [ 2] Orbit 3: The target (Beta Pictoris) is to be offset +1.1 arcseconds in the dispersion direction The 1.1 arcsecond offsets shifts are important for the detection of hydrogen, nitrogen and oxygen which are all affected by airglow contamination. An increase in the off-axis target distance along the dispersion axis effectively shifts the line emission feature in wavelength relative to the airglow emission. ------------------------------------------------------------------------------------ 15396( 4) - 17-Oct-2017 15:41:19 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 -BET-PIC STAR, A4-A9 V-IV, RA=05H47M17.0877S +/- 0.003", J2000 V = 3.861 CIRCUMSTELLAR MATTER, DEC=-51D03'59.44" +/- 0.004" DISK, EXTRA-SOLAR PLANET Reference Frame: Other: SIMBAD Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 4.933023647591619E-4 0.0831 0.051 ------------------------------------------------------------------------------------------------------------------------------------ 15396( 4) - 17-Oct-2017 15:41:19 - [ 4] Visit: 01 (Visit 1) Visit Requirements: SCHED 90%; BEFORE 31-OCT-2017:00:00:00 On Hold Comments: Additional Comments: Orbit 1: Observe target centered in the aperture Orbit 2: The target (Beta Pictoris) is to be offset -1.1 arcseconds in the dispersion direction Orbit 3: The target (Beta Pictoris) is to be offset +1.1 arcseconds in the dispersion direction 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 -BET-PIC COS/FUV ACQ/PEA PSA G130M 1327 NUM-POS=1, LIFETIME-POS=LP3 1 1.4 S (1.4 SEQ 1-3 NON-INT KXD S) ------------------------------------------------------------------------------------------------------------------------------------ 2 -BET-PIC COS/FUV ACQ/PEA PSA G130M 1327 CENTER=DEF, NUM-POS=5, 1 1.4 S (1.4 KD STEP-SIZE=0.9, S) LIFETIME-POS=LP3 ------------------------------------------------------------------------------------------------------------------------------------ 3 -BET-PIC COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=250, FLASH=YES, 1 534 S G FP-POS=ALL, LIFETIME-POS=LP3 see below (1776 S) Comments: The strength of the Stellar Lyman-alpha line has been set to an conservative upper limit to calculate the Buffer-time and check the Bright Objects Limit (FWHM=5 Angstrom, Flux=1e-11). ------------------------------------------------------------------------------------------------------------------------------------ 4 -BET-PIC COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=250, FLASH=YES, 1 534 S POS TARG -1.1, null; SEQ G FP-POS=ALL, LIFETIME-POS=LP3 see below 4 NON-INT (2152 S) Comments: The strength of the Stellar Lyman-alpha line has been set to an conservative upper limit to calculate the Buffer-time and check the Bright Objects Limit (FWHM=5 Angstrom, Flux=1e-11). ------------------------------------------------------------------------------------------------------------------------------------ 5 -BET-PIC COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=250, FLASH=YES, 1 534 S POS TARG 1.1, null; SEQ G FP-POS=ALL, LIFETIME-POS=LP3 see below 5 NON-INT (2152 S) Comments: The strength of the Stellar Lyman-alpha line has been set to an conservative upper limit to calculate the Buffer-time and check the Bright Objects Limit (FWHM=5 Angstrom, Flux=1e-11). ------------------------------------------------------------------------------------------------------------------------------------ 15396( 4) - 17-Oct-2017 15:41:19 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ -BET-PIC 1 COS/FUV ACQ/PEA PSA G130M 1327 none none none none 1 N/A KXD -BET-PIC 2 COS/FUV ACQ/PEA PSA G130M 1327 none none none none 1 N/A KD -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 1 1 444.0 S G -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 2 1 444.0 S G -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 3 1 444.0 S G -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 4 1 444.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 1 2 538.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 2 2 538.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 3 2 538.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 4 2 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 1 3 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 2 3 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 3 3 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 4 3 538.0 S G 15396( 4) - 17-Oct-2017 15:41:19 - [ 6] Visit: 02 (Visit 2) Visit Requirements: SCHED 90%; AFTER 01 BY 30 D TO 80 D On Hold Comments: Additional Comments: Orbit 1: Observe target centered in the aperture Orbit 2: The target (Beta Pictoris) is to be offset -1.1 arcseconds in the dispersion direction Orbit 3: The target (Beta Pictoris) is to be offset +1.1 arcseconds in the dispersion direction 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 -BET-PIC COS/FUV ACQ/PEA PSA G130M 1327 NUM-POS=1, LIFETIME-POS=LP3 1 1.4 S (1.4 GS ACQ SCENARIO BASE1B3; KXD S) SEQ 1-3 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 -BET-PIC COS/FUV ACQ/PEA PSA G130M 1327 CENTER=DEF, NUM-POS=5, 1 1.4 S (1.4 KD STEP-SIZE=0.9, S) LIFETIME-POS=LP3 ------------------------------------------------------------------------------------------------------------------------------------ 3 -BET-PIC COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=250, FLASH=YES, 1 534 S G FP-POS=ALL, LIFETIME-POS=LP3 see below (1776 S) Comments: The strength of the Stellar Lyman-alpha line has been set to an conservative upper limit to calculate the Buffer-time and check the Bright Objects Limit (FWHM=5 Angstrom, Flux=1e-11). ------------------------------------------------------------------------------------------------------------------------------------ 4 -BET-PIC COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=250, FLASH=YES, 1 534 S POS TARG -1.1, null; SEQ G FP-POS=ALL, LIFETIME-POS=LP3 see below 4 NON-INT (2152 S) Comments: The strength of the Stellar Lyman-alpha line has been set to an conservative upper limit to calculate the Buffer-time and check the Bright Objects Limit (FWHM=5 Angstrom, Flux=1e-11). ------------------------------------------------------------------------------------------------------------------------------------ 5 -BET-PIC COS/FUV TIME-TA PSA G130M 1327 BUFFER-TIME=250, FLASH=YES, 1 534 S POS TARG 1.1, null; SEQ G FP-POS=ALL, LIFETIME-POS=LP3 see below 5 NON-INT (2152 S) Comments: The strength of the Stellar Lyman-alpha line has been set to an conservative upper limit to calculate the Buffer-time and check the Bright Objects Limit (FWHM=5 Angstrom, Flux=1e-11). ------------------------------------------------------------------------------------------------------------------------------------ 15396( 4) - 17-Oct-2017 15:41:19 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ -BET-PIC 1 COS/FUV ACQ/PEA PSA G130M 1327 none none none none 1 N/A KXD -BET-PIC 2 COS/FUV ACQ/PEA PSA G130M 1327 none none none none 1 N/A KD -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 1 1 444.0 S G -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 2 1 444.0 S G -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 3 1 444.0 S G -BET-PIC 3 COS/FUV TIME-TA PSA G130M 1327 none none none 4 1 444.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 1 2 538.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 2 2 538.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 3 2 538.0 S G -BET-PIC 4 COS/FUV TIME-TA PSA G130M 1327 none none none 4 2 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 1 3 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 2 3 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 3 3 538.0 S G -BET-PIC 5 COS/FUV TIME-TA PSA G130M 1327 none none none 4 3 538.0 S G 15396( 4) - 17-Oct-2017 15:41:19 - [ 8] Summary Form for Proposal 15396 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAKD, ACQ/PEAKXD, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=250, CENTER=DEF, FLASH=YES, FP-POS=ALL, LIFETIME-POS=LP3, NUM-POS=1, NUM-POS=5, STEP-SIZE=0.9 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 30 D TO 80 D, BEFORE 31-OCT-2017:00:00:00, GS ACQ SCENARIO BASE1B3, POS TARG -1.1, null, POS TARG 1.1, null, SCHED 90%, SEQ 1-3 NON-INT, SEQ 4 NON-INT, SEQ 5 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M ------------------------------------------------------------------------------------------------------------------------------------ Target Names -BET-PIC ------------------------------------------------------------------------------------------------------------------------------------