6469( 35) - 08/26/99 12:51 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6469 Version: 35 Check-in Date: 26-Aug-1999 12:50:41 1.Proposal Title: Pyramid Imaging of Circumstellar Material About Nearby Stars ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 6 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Alfred Schultz Computer Sciences Corporation CoI: Fred Bruhweiler Catholic University of America N CoI: Kwang-Ping Cheng California State University Fullerton N CoI: Mike DiSanti Catholic University of America N CoI: Helen Hart Computer Sciences Corporation N CoI: Kent Reinhard Doane College N CoI: Glenn Schneider Steward Observatory, Tucson N ------------------------------------------------------------------------------------ 5. Abstract We propose to use the WFPC2 pyramid as a coronagraph to detect circumstellar material about five nearby stars. Two orbits will be devoted to each target. Each target star will be acquired in PC1. The first orbit will be used for an INTACQ to position the core of the stellar PSF off the edge of PC1 in WF2 followed by 4 thirty second F850LP observations, while the second orbit will be used to image the expected circumstellar disk material in PC1. Four ten minute exposures with the F555W filter will be obtained, reaching a limiting magnitude V~26. This imaging technique is only possible with the WFPC2 onboard HST. ------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 2] Observations Description ------------------------ We propose high resolution PC1 observations with the F555W and F850LP filters of the selected targets. The stellar PSF for each target star will be positioned off the edge of PC1, isolating the effects of overexposure (saturation and blooming) to adjacent CCD frame WF2. A total of 4 ten minute exposures with the F555W filter and 4 thirty second exposures with the F850LP filter will be obtained for each target. A real-time acquisition will be necessary to position the core of the stellar PSF in CCD frame WF2. We list the observational properties of the selected targets. Target Properties Target & Name & v sin i & dis.(pc) & type & mv & F(25 Mu)J & F(60 Mu)J------------------ --------------------------------------------------- HD 216956 & Formalhaut & 100 & 6.7 & A3V & 1.17 & 4.81 & 9.02 HD 22049 & Eta Eri & 17 & 3.3 & K2V & 3.73 & 2.65 & 1.66 HD 102647 & Beta Leo & 121 & 12 & A3V & 2.14 & 2.11 & 1.18 HD 158643 & 51 Oph & - & 28 & A0V & 4.80 & 10.19 & 1.06 HD 139006 & Alpha CrB & 133 & 24 & A0V & 2.21 & 1.73 & 0.57 CAL Target---------- HD230321 & 98 Aqr & - & 34 & K0 & 3.95 & - & - HD115892 & Iota Cen & 85 & 22 & A2V & 2.75 & 0.97 & 0.40L Each visit to a target star will follow a 2-orbit sequence. First orbit: Interactive Acquisition (INT ACQ) one short (~0.7 sec) exposure with F343N will be sent to the ground, and target star centroid. Offsets will be calculated to position the target off the edge of PC1 into WF2, at X=-19.5", Y=0.0" from center of PC1. Slews sent up to spacecraft. Decision time should be shorten to allow FOUR 30 second F850LP filter observations following the INT ACQ and to fill the first orbit. The exposure line for "Exposure_Number: 5" has been commented out due to RPS2 does not allow the user to shorten the decision exposure time. If possible, the overhead for the fourth 30 sec exposure should be hidden in earth occultation. The four 30 sec F850LP exposures will be grouped into pairs of observations, with the second pair dithered by +0.25,+0.25 arcseconds. Second orbit: Two 20 minute exposures (CR-SLPIT, four 600 sec exposures) with F555W. Real Time Justification ----------------------- Two requirements are necessary to image successfully the outer regions of a circumstellar disk about a nearby star: 1) positioning of each star ~2" off the edge of PC1, and 2) CLOCKS should be on. A real-time acquisition (INTACQ) is required to correctly position the core of the stellar PSFs on the same pixel in the WF2 frame. Positioning in the CCD frame is critical such that there are no overexposure effect in PC1 (in which a portion of a circumstellar disk is to be imaged). Unlike WFPC1, WFPC2 CCDs are clocked in Multi-Phased Pinning (MPP) mode, greatly reducing the effects of charge migration which can lead to column bleeding. This is an added advantage that was not available with WFPC1. From analysis of our cycle 5 images of Beta Pictoris obtained during the first set of INTACQs, it was possible to position the core of the PSF for Alpha & Beta Pic within the same WF4 pixel. We discovered by trail-and-error that subpixel shifting of the Alpha Pic image to match the Beta Pic image was sufficient, and necessary, for subtracting out most of the diffraction spikes. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 3] Data Distribution Paper Products: NO Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD22049 STAR, K V-IV RA=03H 32M 55.85S +/- 0.01S, J2000 V=+16.7 V = 3.726 DEC=-09D 27' 29.7" +/- 0.01" B-V = +0.881 Comments: ETA ERI proper motion, parallax, V-magnitude, color index B-V, spectral type=K2V, and radial velocity obtained from The Hipparcos Input Catalogue, EAS SP- 1136. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000.0 -0.065828 0.021 0.303 2 HD230321 STAR, K III-I RA=23H 22M 58.22S +/- 0.40S, J2000 V=-6.5 V = 3.957 DEC=-20D 6' 1.9" +/- 10.0" B-V = +1.082 Comments: 98 Aqr proper motion, parallax, V-magnitude, color index B-V, spectral type=K1V, and radial velocity obtained from The Hipparcos Input Catalogue, EAS SP- 1136. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000.0 -0.0085188 -0.096 0.029 3 HD102647 STAR, A0-A3 V-IV RA=11H 49M 3.58S +/- 0.01S, J2000 V=-0.2 V = 2.136 DEC=14D 34' 19.3" +/- 0.01" B-V = +0.090 Comments: BETA LEO proper motion, parallax, V-magnitude, color index B-V, spectral type=A3Vvar, and radial velocity obtained from The Hipparcos Input Catalogue, EAS SP- 1136. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000.0 -0.034234 -0.114 0.076 4 HD115892 STAR, A0-A3 V-IV RA=13H 20M 35.82S +/- 0.01S, J2000 V=+0.1 V = 2.750 DEC=-36D 42' 44.3" +/- 0.01" B-V = +0.038 Comments: IOTA CEN proper motion, parallax, V-magnitude, color index B-V, spectral type=A2V, and radial velocity obtained from The Hipparcos Input Catalogue, EAS SP- 1136. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000.0 -0.028358 -0.085 0.045 5 HD139006 STAR, A0-A3 V-IV RA=15H 34M 41.27S +/- 0.01S, J2000 V=+1.7 V = 2.221 DEC=26D 42' 52.9" +/- 0.01" B-V = -0.015 Comments: ALPHA CrB proper motion, parallax, V-magnitude, color index B-V, spectral type=A0V, and radial velocity obtained from The Hipparcos Input Catalogue, EAS SP- 1136. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000.0 0.0090306 -0.089 0.043 6 HD158643 STAR, A0-A3 V-IV RA=17H 31M 24.96S +/- 0.01S, J2000 V=-12.0 V = 4.803 DEC=-23D 57' 45.6" +/- 0.01" B-V = +0.016 Comments: 51 Oph proper motion, parallax, V-magnitude, color index B-V, spectral type=A0V, and radial velocity obtained from The Hipparcos Input Catalogue, EAS SP- 1136. 6469( 35) - 08/26/99 12:51 - [ 5] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000.0 0.0002918 -0.026 0.033 7 HD216956 STAR, A0-A3 V-IV RA=22H 57M 39.05S +/- 0.01S, J2000 V=+6.1 V = 1.166 DEC=-29D 37' 20.1" +/- 0.01" B-V = +0.088 Comments: Fomalhaut proper motion, parallax, V-magnitude, color index B-V, spectral type=A3V, and radial velocity obtained from The Hipparcos Input Catalogue, EAS SP- 1136. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000.0 0.025537 -0.165 0.144 6469( 35) - 08/26/99 12:51 - [ 6] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD22049 (Eta Eri) in PC1, determine the centroid of the PSF and offsets to position Eta Eri 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. INT ACQ decision time should be shortened to allow four 30 sec exposures during first orbit following INT ACQ. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD22049 WFPC2 IMAGE PC1 F343N 1 1.6 S INT ACQ FOR 2-7 SEQ 1-5 NON-INT Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD22049 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD22049 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 2 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD22049 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S POS TARG 0.25, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD22049 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 4 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD22049 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 2 NO SPLIT SEQ 6-7 NON-INT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 7 HD22049 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 6 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 8] Visit: 02 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD230321 (98 Aqr) in PC1, determine the centroid of the PSF and offsets to position 98 Aqr 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1.INT ACQ decision time should be shortened to allow four 30 sec exposures during first orbit following INT ACQ. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD230321 WFPC2 IMAGE PC1 F343N 1 1.0 S INT ACQ FOR 2-7 SEQ 1-5 NON-INT GS ACQ SCENARIO SINGLE Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD230321 WFPC2 IMAGE PC1 F850LP 1 30 S Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD230321 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 2 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD230321 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S POS TARG 0.25, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD230321 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 4 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD230321 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 2 NO SPLIT SEQ 6-7 NON-INT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 9] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 7 HD230321 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 6 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 10] Visit: 03 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD102647 (beta Leo) in PC1, determine the centroid of the PSF and offsets to position beta Leo 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. INT ACQ decision time should be shortened to allow four 30 sec exposures during first orbit following INT ACQ. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD102647 WFPC2 IMAGE PC1 F343N 1 0.11 S INT ACQ FOR 2-7 SEQ 1-5 NON-INT GS ACQ SCENARIO SINGLE Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD102647 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD102647 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 2 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD102647 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S POS TARG 0.25, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD102647 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 4 Comments: Short exposure V image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD102647 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 2 NO SPLIT SEQ 6-7 NON-INT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 11] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 7 HD102647 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 6 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 12] Visit: 04 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD115892 (Iota Cen) in PC1, determine the centroid of the PSF and offsets to position Iota Cen 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. INT ACQ decision time should be shortened to allow four 30 sec exposures during first orbit following INT ACQ. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD115892 WFPC2 IMAGE PC1 F343N 1 0.2 S INT ACQ FOR 2-7 SEQ 1-5 NON-INT Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD115892 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD115892 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 2 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD115892 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S POS TARG 0.25, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD115892 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 4 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD115892 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 2 NO SPLIT SEQ 6-7 NON-INT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 13] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 7 HD115892 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 6 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 14] Visit: 05 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD139006 (Alphecca) in PC1, determine the centroid of the PSF and offsets to position Alphecca 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. INT ACQ decision time should be shortened to allow four 30 sec exposures during first orbit following INT ACQ. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD139006 WFPC2 IMAGE PC1 F343N 1 0.11 S INT ACQ FOR 2-7 SEQ 1-5 NON-INT GS ACQ SCENARIO SINGLE Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD139006 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD139006 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 2 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD139006 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S POS TARG 0.25, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD139006 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 4 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD139006 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 2 NO SPLIT SEQ 6-7 NON-INT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 15] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 7 HD139006 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 6 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 16] Visit: 06 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD158643 (51 Oph) in PC1, determine the centroid of the PSF and offsets to position 51 Oph 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. INT ACQ decision time should be shortened to allow four 30 sec exposures during first orbit following INT ACQ. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD158643 WFPC2 IMAGE PC1 F343N 1 1.0 S INT ACQ FOR 2-7 SEQ 1-5 NON-INT Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD158643 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD158643 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 2 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD158643 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S POS TARG 0.25, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD158643 WFPC2 IMAGE PC1 F850LP CLOCKS=YES 1 30 S SAME POS AS 4 Comments: Short exposure I image to search in close for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD158643 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 2 NO SPLIT SEQ 6-7 NON-INT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 17] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 7 HD158643 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M SAME POS AS 6 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 18] Visit: 07 Visit Priority: Visit Requirements: ORIENT 3D TO 5D On Hold Comments: Additional Comments: The first observation in this series will be used to center HD216956 (Fomalhaut) in PC1, determine the centroid of the PSF and offsets to position Fomalhaut 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. ORIENT required to position the disk into PC1. The first set of images should be sent to the ground for analaysis. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 HD216956 WFPC2 IMAGE PC1 F343N ATD-GAIN=15 1 0.11 S RT ANALYSIS SAVE OFFSET OFF07 POS TARG -10.0, 0.0 Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 20 HD216956 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S NEW ALIGNMENT POS TARG -10.0, 0.0 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 30 HD216956 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG -9.75, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 40 HD216956 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG -10.0, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 50 HD216956 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG -9.75, 0.00 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 60 HD216956 WFPC2 IMAGE PC1 F1042M CLOCKS=YES,CR-SPLIT=NO 3 100 S NO SPLIT POS TARG -10.0, 0.0 Comments: Long exposure 1.042 micron image to search for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 19] Visit: 08 Visit Priority: Visit Requirements: SAME ORIENT AS 07 AFTER 07 BY 3 Orbits TO 5 Orbits On Hold Comments: Additional Comments: REUSE TARGET OFFSET required to position target HD216956 (Fomalhaut) into WF2 about 2" off the edge of PC1. The core of the PSF should be midway along the edge of PC1. ORIENT required to position the disk into PC1. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD216956 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M USE OFFSET OFF07 NO SPLIT SEQ 1-2 NON-INT POS TARG -10.0, 0.0 Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 2 HD216956 WFPC2 IMAGE PC1 F555W CLOCKS=YES,CR-SPLIT=NO 1 10 M USE OFFSET OFF07 NO SPLIT POS TARG -10.0, 0.0 Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD216956 WFPC2 IMAGE PC1 F555W CLOCKS=YES,CR-SPLIT=NO 1 500 S USE OFFSET OFF07 NO SPLIT POS TARG -10.0, 0.0 Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 20] Visit: 09 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD22049 (Eta Eri) in PC1, determine the centroid of the PSF and offsets to position Eta Eri 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. ORIENT required to position the disk into PC1. The first set of images should be sent to the ground for analysis. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD22049 WFPC2 IMAGE PC1 F343N 1 1.6 S RT ANALYSIS SAVE OFFSET OFF09 Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD22049 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S NEW ALIGNMENT Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD22049 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG 0.25, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD22049 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG 0.00, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD22049 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG 0.25, 0.00 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD22049 WFPC2 IMAGE PC1 F1042M CLOCKS=YES,CR-SPLIT=NO 3 100 S NO SPLIT Comments: Long exposure 1.042 micron image to search for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 21] Visit: 10 Visit Priority: Visit Requirements: SAME ORIENT AS 09 AFTER 09 BY 3 Orbits TO 5 Orbits On Hold Comments: Additional Comments: REUSE TARGET OFFSET required to position target HD22049 (ETA-ERIDANI) into WF2 about 2" off the edge of PC1. The core of the PSF should be midway along the edge of PC1. ORIENT required to position the disk into PC1. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD22049 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M USE OFFSET OFF09 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 2 HD22049 WFPC2 IMAGE PC1 F555W CLOCKS=YES,CR-SPLIT=NO 1 10 M USE OFFSET OFF09 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD22049 WFPC2 IMAGE PC1 F555W CLOCKS=YES,CR-SPLIT=NO 1 500 S USE OFFSET OFF09 NO SPLIT Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 22] Visit: 11 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: The first observation in this series will be used to center HD230321 (98 Aqr) in PC1, determine the centroid of the PSF and offsets to position 98 Aqr 2" off the edge of PC1 in WF2. The core of the PSF should be midway along the edge of PC1. ORIENT required to position the disk into PC1. The first set of images should be sent to the ground for analysis. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD230321 WFPC2 IMAGE PC1 F343N 1 1.0 S RT ANALYSIS POS TARG -10, 0 SAVE OFFSET OFF11 Comments: This is the F343N real-time acquisition. Observation used to determine the position of the target in PC1. Offsets will be calculated to position the target off the edge of PC1 at X=-19.5", Y=0.0". ------------------------------------------------------------------------------------------------------------------------------------ 2 HD230321 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S NEW ALIGNMENT POS TARG -10, 0 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD230321 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG -9.75, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 4 HD230321 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG -10.00, 0.25 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 5 HD230321 WFPC2 IMAGE PC1 F1042M CLOCKS=YES 2 30 S POS TARG -9.75, 0.00 Comments: Short exposure I image to search in close for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 6 HD230321 WFPC2 IMAGE PC1 F1042M CLOCKS=YES,CR-SPLIT=NO 3 100 S NO SPLIT POS TARG -10, 0 Comments: Long exposure 1.042 micron image to search for faint companions and circumstellar material. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 23] Visit: 12 Visit Priority: Visit Requirements: SAME ORIENT AS 11 AFTER 11 BY 3 Orbits TO 5 Orbits On Hold Comments: Additional Comments: REUSE TARGET OFFSET required to position target HD230321 (98 Aqr) in PC1. The core of the PSF should be midway along the edge of PC1. ORIENT required to position the disk into PC1. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD230321 WFPC2 IMAGE PC1 F555W CLOCKS=YES 1 20 M USE OFFSET OFF11 NO SPLIT POS TARG -10, 0 Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 2 HD230321 WFPC2 IMAGE PC1 F555W CLOCKS=YES,CR-SPLIT=NO 1 10 M USE OFFSET OFF11 NO SPLIT POS TARG -10, 0 Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 3 HD230321 WFPC2 IMAGE PC1 F555W CLOCKS=YES,CR-SPLIT=NO 1 500 S USE OFFSET OFF11 NO SPLIT POS TARG -10, 0 Comments: Long exposure V image to search in the far field for faint companions and circumstellar material with the core of the PSF just off the edge of PC1. ------------------------------------------------------------------------------------------------------------------------------------ 6469( 35) - 08/26/99 12:51 - [ 24] Summary Form for Proposal 6469 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CLOCKS=YES ATD-GAIN=15 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements INT ACQ FOR 2-7 SEQ 1-5 NON-INT SAME POS AS 2 POS TARG 0.25, 0.25 SAME POS AS 4 SAME POS AS 2 NO SPLIT SEQ 6-7 NON-INT SAME POS AS 6 NO SPLIT INT ACQ FOR 2-7 SEQ 1-5 NON-INT GS ACQ SCENARIO SINGLE ORIENT 3D TO 5D RT ANALYSIS SAVE OFFSET OFF07 POS TARG -10.0, 0.0 NEW ALIGNMENT POS TARG -10.0, 0.0 POS TARG -9.75, 0.25 POS TARG -10.0, 0.25 POS TARG -9.75, 0.00 NO SPLIT POS TARG -10.0, 0.0 SAME ORIENT AS 07 AFTER 07 BY 3 Orbits TO 5 Orbits USE OFFSET OFF07 NO SPLIT SEQ 1-2 NON-INT POS TARG -10.0, 0.0 USE OFFSET OFF07 NO SPLIT POS TARG -10.0, 0.0 RT ANALYSIS SAVE OFFSET OFF09 NEW ALIGNMENT POS TARG 0.00, 0.25 POS TARG 0.25, 0.00 NO SPLIT SAME ORIENT AS 09 AFTER 09 BY 3 Orbits TO 5 Orbits USE OFFSET OFF09 NO SPLIT RT ANALYSIS POS TARG -10, 0 SAVE OFFSET OFF11 NEW ALIGNMENT POS TARG -10, 0 POS TARG -10.00, 0.25 NO SPLIT POS TARG -10, 0 SAME ORIENT AS 11 AFTER 11 BY 3 Orbits TO 5 Orbits USE OFFSET OFF11 NO SPLIT POS TARG -10, 0 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F343N F850LP F555W F1042M ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD22049 HD230321 HD102647 HD115892 HD139006 HD158643 HD216956 ------------------------------------------------------------------------------------------------------------------------------------