13406( 5) - 31-Jan-2014 13:50:03 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13406 Version: 5 Check-in Time: 31-Jan-2014 13:50:03 STScI Edit Number: 2 Title Hydrogen, Deuterium and Nitrogen in the Beta Pictoris disk ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Alain Lecavelier des Etangs CNRS, Institut d'Astrophysique de Paris Y CoI: Dr. Alfred Vidal-Madjar CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Herve Beust Universite de Grenoble I N CoI: Mr. Vincent Bourrier CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Jean-Michel Desert University of Colorado at Boulder N CoI: Dr. David Ehrenreich Observatoire de Geneve N CoI: Dr. Roger D. Ferlet CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Guillaume Hebrard CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Flavien Kiefer CNRS, Institut d'Astrophysique de Paris N CoI: Dr. Anne-Marie Lagrange Universite de Grenoble I N ------------------------------------------------------------------------------------ Abstract The Beta Pictoris system is a young planetary system (about 10 million years old), likely at the end of the telluric planets formation phases. It is embedded in a disk which is the prototype of debris disks where both gas and dust are continuously replenished via collision and evaporation of planetesimals and comet-like bodies. Because of its edge-on inclination, the gas component of the disk can be observed in great details through absorption spectroscopy. FUSE far UV observations allowed the discovery that the Beta Pictoris debris disk is extremely carbon rich. This unexpected carbon over-abundance is due to either a peculiar composition of the original protoplanetary system, to radiation forces blowing-out radiation-sensitives species, or to condensation/evaporation processes. Fortunately, hydrogen, deuterium and nitrogen are key volatiles sensitive to the radiation, condensation and evaporation processes. They can serve as diagnostics of the still puzzling gaseous disk history. Using COS far-UV capabilities, we propose to search for those species, which have up to now never been observed in this system. We will measure the HI, DI, and NI column density to trace the gas disk origin and provide constraints on its dynamics. The measurement of N/C ratio will also provide key information for the understanding of the observed carbon excess. These observations will bring new informations on the physical processes taking place in this active system during the last stages of the planet formation. ------------------------------------------------------------------------------------ Observations Description ------------------------ In the first orbit, we will observe using the G130M/1291A setup with the target Beta Pictoris centered in the aperture. The second orbit will be used to obtain a T-Tag image of the Lyman-alpha airglow contamination by observing off-target (1 arcmin), just one orbit after the first orbit. The exposures have been ajusted to obtain the same exposures (same FP-Split positions) for the off-target offset position as for the on-target AT THE SAME ORBITAL POSITION OF THE TELESCOPE to correctly map the 13406( 5) - 31-Jan-2014 13:50:03 - [ 2] airglow contamination. A single on-target (FP-Split position=1) is required at the beginning of orbit #2 : - (1) to obtain the off-target exposures of orbit #2 at the same telescope's orbital position as for the on-target exposures of orbit #1 - (2) obtain additional science exposure on the target Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- Beta Pictoris is at opposition near December 15. The observations should be scheduled close to the opposition in order to reduce the Airglow contamination. In that purpose, we used the time constraints defined by the Period (365.25 days), Zero Phase (2456658.5 = 1 Jan 2014) and Phase Constraints of the 1st exposure (Phase 0.833 = 1 Nov to 0.165 = 28 Feb) for the observations to be scheduled within 2.5 months from opposition. The "auto-adjust" has not be used to keep the observation for the off-target offset position as for the on-target AT THE SAME ORBITAL POSITION, and to keep the total time below 54 minutes per orbit (and to schedulable in February 2014). ------------------------------------------------------------------------------------ 13406( 5) - 31-Jan-2014 13:50:03 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 2 BETA-PIC-OFF CALIBRATION, RA-OFF=0S, DEC-OFF=60", FROM 1 J2000 V = 20 ~5e-13 erg /s/cm2/A at 1216A SET UNDESIGNATED (Earth airglow at Lyman-alpha) Comments: This is a background direction to measure the geocoronal airglow, off the science target. V -magnitude is arbitrarily set to 20 (required for "Bright Object Sensitive Detectors") ------------------------------------------------------------------------------------------------------------------------------------ 1 BETA-PIC STAR, A4-A9 V-IV, RA=05H47M17.0877S +/- 0.003", J2000 V = 3.861 CIRCUMSTELLAR MATTER, DEC=-51D03'59.44" +/- 0.004" DISK Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Target Coordinates and proper motion are from Hipparcos, the New Reduction (van Leeuwen, 2007) 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 ------------------------------------------------------------------------------------------------------------------------------------ 13406( 5) - 31-Jan-2014 13:50:03 - [ 4] Visit: 01 Visit Requirements: Period 365.25 D AND ZERO-PHASE HJD2456293.5; VISIBILITY INTERVAL 54 M 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 BETA-PIC COS/FUV ACQ/PEA PSA G130M 1291 1 1.6 S (1.6 PHASE 0.833 TO 0.165; KXD S) SEQ 1-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 BETA-PIC COS/FUV ACQ/PEA PSA G130M 1291 CENTER=DEF, NUM-POS=5, 1 1.6 S (1.6 KD STEP-SIZE=0.9 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 BETA-PIC COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=400, FLASH=YES, 1 220 S (220 G FP-POS=1 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 BETA-PIC COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=400, FLASH=YES, 1 400 S G FP-POS=ALL (1600 S) Comments: In the ETC run, the strength of the Stellar Lyman-alpha line has been set to an extremely conservative upper limit to calculate the Buffer-time and check the Bright Object Limit (FWHM=2 Angstrom., Flux=4e-12). ------------------------------------------------------------------------------------------------------------------------------------ 5 BETA-PIC COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=400, FLASH=YES, 1 649 S (649 SEQ 5-6 NON-INT G FP-POS=1 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 BETA-PIC-OF COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=400, FLASH=YES, 1 400 S FSET G FP-POS=ALL (1600 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 | ------------------------------------------------------------------------------------------------------------------------------------ BETA-PIC 1 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KXD BETA-PIC 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KD BETA-PIC 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G BETA-PIC 4 COS/FUV TIME-TA PSA G130M 1291 none none none 1 1 N/A G BETA-PIC 4 COS/FUV TIME-TA PSA G130M 1291 none none none 2 1 N/A G BETA-PIC 4 COS/FUV TIME-TA PSA G130M 1291 none none none 3 1 N/A G 13406( 5) - 31-Jan-2014 13:50:03 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ BETA-PIC 4 COS/FUV TIME-TA PSA G130M 1291 none none none 4 1 N/A G BETA-PIC 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G BETA-PIC-OFFSET 6 COS/FUV TIME-TA PSA G130M 1291 none none none 1 2 N/A G BETA-PIC-OFFSET 6 COS/FUV TIME-TA PSA G130M 1291 none none none 2 2 N/A G BETA-PIC-OFFSET 6 COS/FUV TIME-TA PSA G130M 1291 none none none 3 2 N/A G BETA-PIC-OFFSET 6 COS/FUV TIME-TA PSA G130M 1291 none none none 4 2 N/A G 13406( 5) - 31-Jan-2014 13:50:03 - [ 6] Summary Form for Proposal 13406 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAKD, ACQ/PEAKXD, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=400, CENTER=DEF, FLASH=YES, FP-POS=1, FP-POS=ALL, NUM-POS=5, STEP-SIZE=0.9 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PHASE 0.833 TO 0.165, Period 365.25 D AND ZERO-PHASE HJD2456293.5, SEQ 1-4 NON-INT, SEQ 5-6 NON-INT, VISIBILITY INTERVAL 54 M ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M ------------------------------------------------------------------------------------------------------------------------------------ Target Names BETA-PIC, BETA-PIC-OFFSET ------------------------------------------------------------------------------------------------------------------------------------