Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5700 Report Date: 10-Aug-95:14:59 Version: ********** Check-in Date: ********** 1.Proposal Title: DISKS AROUND MAIN SEQUENCE STARS: CYCLE 4 CARRYOVER ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID INTERSTELLAR MEDIUM GO/CAR 5244 Sub Category CIRCUMSTELLAR MATTER ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Christopher J. Burrows STSCI USA (410) 338-4913 ------------------------------------------------------------------------------------ 7. Abstract We propose to examine the circumstellar disk around Beta Pictoris in order to determine its radial profile, and hence (in combination with IRAS data) to fix its albedo and temperature profile. These observations will extend previous extensive ground based coronagraphic investigations, and modelling by the authors. The data will enable us to understand better the central clearing in the disk and whether it is caused by sublimation or possible planet formation. The observations will also constrain the geometric properties of the disk including its inclination angle, vertical thickness and radial profile. Such observations limit models for the dynamics of the disk, including its velocity dispersion and hence mass distribution, and radial mass transport mechanisms. If density waves or clear zones are observed, they will give indirect evidence for the presence of massive bodies (planets) in the disk. The observations involve a judicious use of roll deconvolution and PSF modelling in order to allow the central stellar image and associated scattered light to be subtracted. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 2.32 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ 12. Special sched req: Time Critical obs. ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5700 PI: Christopher J. Burrows Proposal Title: DISKS AROUND MAIN SEQUENCE STARS: CYCLE 4 CARRYOVER ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Pi Christopher J. Burrows STSCI USA X John E. Krist STSCI USA Pawel Artymowicz LICK OBSERVATORY USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. For Beta Pictoris, the observations are designed to give the clearest possible image of the disk. The basic observations are in reflected stellar light with the star in the corner of PC1 (near the OTA axis). This is done to avoid the scatter found to occur in WFPC2 due to the CCD electrode structure (documented in the WFPC2 Instrument Science Report 94-01). This type of scatter occurs only in the chip where the star is located. By using the proper orientations, we can detect the disk in WF4 and WF2, unaffected by such scatter (where scatter from the OTA dominates). To separate disk and instrument scatter, the observations will be taken at different roll angles (scatter structure will remain stationary while the disk rotates). ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. The observations must occur when the Beta Pictoris disk is aligned so that it is visible in the WF4 and WF2 cameras. The orientations are chosen to ensure that as much of the disk as possible is visible. All three roll angles should occur in the same visit, and the maximum roll offsets are preferred. The position angle of the disk is 31 degrees. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). The authors have workstations and already have written the relevant computer software to model the PSF, subtract the images, parameterize the disk, and fit it to thermal and mass equilibrium models. The authors will perform the data reduction and analysis. ------------------------------------------------------------------------------------ 11. Address Information Name: CHRISTOPHER J. BURROWS Category: PI Institution: STScI Address: SPACE TELESCOPE SCIENCE INSTITUTE 3700 SAN MARTIN DRIVE City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: 410-338-4913 Telex (or e-mail): ------------------------------------------------------------------------------------ Name: JOHN E. KRIST Category: CON Institution: STScI Address: 3700 San Martin Drive City: Baltimore State: MD Zip Code: 21218 Country: USA Telephone: (410) 338-5030 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5700 [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD39060 BETA A,124,904 RA = 5H 46M 5.935S +/- 0.1S, 1950 1 V=3.9,TYPE=A5V -PIC DEC = -51D 5' 1.75" +/- 0.1" 1 B-V=0.2 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) B 1950.00 0.0005 +/- 0.0000 0.0870 +/- 0.0000 0.0000 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5700 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F555W ATD-GAIN=15 1 1.0S 1 1 1 IMAGES1 CR-SPLIT=NO Comments: THIS EXPOSURE USED FOR REGISTRATION. ------------------------------------------------------------------------------------------------------------------------------------ 1.2 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F555W CLOCKS=YES 1 40.0S 1 1 1 IMAGES1 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 1.3 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F555W CLOCKS=YES 2 4.0M 1 1 1 IMAGES1 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 1.4 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F814W CLOCKS=YES 1 5.0M 1 1 1 IMAGES1 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 1.5 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F439W CLOCKS=YES 1 9.0M 1 1 1 IMAGES1 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 2.1 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F555W CLOCKS=YES 1 40.0S 1 1 1 IMAGES2 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 2.2 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F555W CLOCKS=YES 2 4.0M 1 1 1 IMAGES2 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 2.3 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F814W CLOCKS=YES 1 5.0M 1 1 1 IMAGES2 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 2.4 DEFINE HD39060 WFPC2 IMAGE PC1-FIX F439W CLOCKS=YES 1 9.0M 1 1 1 IMAGES2 ATD-GAIN=15 CR-SPLIT=NO Comments: STAR WILL BE SATURATED. ------------------------------------------------------------------------------------------------------------------------------------ 10 USE CYCLE 4 IMAGES1 SEQ 1.1-1.5 NO GAP ORIENT 297D +/- 5D POS TARG -14.1,- 14.3 GROUP 10-12 NO GAP Comments: ORIENT CAN ALSO BE 117D. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5700 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 USE CYCLE 4 IMAGES2 SEQ 2.1-2.4 NO GAP ORIENT 20D +/- 10D FROM 10 POS TARG -14.1,- 14.3 Comments: MUST OCCUR DURING SAME VISIT AS LINE 10. ------------------------------------------------------------------------------------------------------------------------------------ 12 USE CYCLE 4 IMAGES2 SEQ 2.1-2.4 NO GAP ORIENT -20D +/- 10D FROM 10 POS TARG -14.1,- 14.3 Comments: MUST OCCUR DURING SAME VISIT AS LINE 10. ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5700 [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 CR-SPLIT=NO CLOCKS=YES ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO/CAR ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 2.32 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category INTERSTELLAR MEDIUM ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category CIRCUMSTELLAR MATTER ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4; SEQ 1.1-1.5 NO GAP; ORIENT 297D +/- 5D; POS TARG -14.1,-14.3; GROUP 10-12 NO GAP SEQ 2.1-2.4 NO GAP; ORIENT 20D +/- 10D FROM 10; POS TARG -14.1,-14.3 ORIENT -20D +/- 10D FROM 10; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W F814W F439W ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD39060 BETA-PIC ------------------------------------------------------------------------------------------------------------------------------------