6518( 3) - 02/16/96 12:22 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6518 Version: 3 Check-in Date: 16-Feb-1996 11:36:30 1.Proposal Title: High spatial resolution polarization mapping of the nebula around Eta Carinae ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle INTERSTELLAR MEDIUM GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Jeremy Walsh Space Telescope European Coordinating Facility CoI: Prof. John Meaburn Department of Astronomy, University of N Manchester CoI: Dr. Nancy Ageorges Max-Planck Institute for Extra-Terrestrial N Physics ------------------------------------------------------------------------------------ 6. Abstract The ejecta from Eta Car (LBV, most luminous star in the Galaxy, pre-SN?) comprise the Homunculus nebula, a dense dusty bipolar-shaped, predominantly reflection, nebula surrounded by a fast-moving fragmented shell. The velocity vectors of these fragments point back to Eta Car and indicate an ejection in the middle of the last century. Why a single star should eject mass in a clearly non-spherically symmetric way is not understood, but a deeper understanding can only follow from the 3-D geometry of the ejection nebula, the Homunculus. A novel method of exploring the 3-D shape of the Homunculus through imaging polarimetry is proposed to resolve the controversy on its real shape. By imaging the sub-arcsec knots and filaments in the Homunculus in polarized light, their position along the line of sight can be determined using a geometrical model with dust scattering for the nebula. By observing at a number of wavelengths, a detailed model of the scattering properties of the dust in the Homunculus can be made and then applied to determine the geometry. Careful selection of the filter passbands in which to perform polarimetry will allow the effect of emission lines on continuum scattering to be assessed, especially for the knots in the close vicinity of Eta Car. The result will be a clearer picture of the geometry of the ejection nebula from a massive star, thus enabling the fundamental questions of ejection mechanisms to be addressed. ------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 2] Observations Description ------------------------ The Homunculus nebula and Eta Carinae will be imaged with the WFC+PC chips in five filters together with the Polarizer POLQ filter to map the polarization structure at 0.1'' scales. The filters have been chosen with regard to wide wavelength coverage (to enable a good model of the dust scattering function to be determined) and low contamination of scattered continuum by emission lines. For each filter and position of the Polarizer POLQ, short (order a few sec) and longer 100 -- 800s exposures (depending on filter - detector efficiency and nebula surface brightness) would be obtained to give the core unsaturated and deep images of the nebulosity. In addition images without the Polarizer QUAD are to be obtained in order to precisely register the polarizer images, since the peak position in polarized light may not correspond to the peak in total flux on account of scattering in the source. Additional exposures without the Polarizer in filters F218W and F953N were added to fill unused target visibility. These are very useful probes of the scattering efficiency at short and long wavelengths respectively. The F953N data will be used to match the HST observations to ground based adaptive optics observations in the near-IR, scheduled on the ESO 3.6m in March 1996. In calculating exposure times, the WFPC2 images of the Homunculus (PI Sparks) have been examined, with allowance made for the Polarizer. For example, for the F375N filter, an exposure time of 800s per POLQ position angle will result in about 170 ADU's per 0.1''^2 pixel in the faintest outer regions, allowing a percentage polarization accuracy of ~4% per pixel (neglecting systematics). We have adopted strategy 1a of the WFPC2 Science Report 95-01 although the calibration results are not yet known with accuracy. Images with POLQ and the filters are taken in the PC1, followed by WF2, WF3 and WF4 all with the same orient. The aim is for polarization accuracy of 4% or better and a spatial resolution of 0.2''. The former figure is realistic given the high polarization in the Homunculus and the latter figure allows some spatial degradation concomitant on sequential placing of the target on the CCD's. The lowest polarization (over Eta Car) is ~3% and the highest ~40%. From the available polarization modelling, typical differences in the polarization of the near and far sides of the shell would be 10-20% so that errors of ~5% would enable the science to be done, although our polarimetric experience shows that very high signal ensures that only systematics dominate. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 3] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ETA-CARINAE ISM; REFLECTION NEBULA; RA=10H 45M 03.65S +/- 0.05S, J2000 Z=+7 V = 8.2+/-0.1 BIPOLAR OUTFLOW DEC=-59D 41' 03.5" +/- 0.5" B-V = 0.5+/-0.1 F(5500)=16+/-3e-13 SURF-CONT(5500)=10+/-5e-15 Comments: Point source with emission lines embedded in a reflection nebula of size about 17x10 arcsec with major axis at PA 130D 6518( 3) - 02/16/96 12:22 - [ 5] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ETA-CARINAE WFPC2 IMAGE PC1 F375N CR-SPLIT=NO,ATD 1 10S POS TARG +8.0,+8.0; MAX DUR 10S -GAIN=15 Comments: F375N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 2 ETA-CARINAE WFPC2 IMAGE PC1 F375N,POL CR-SPLIT=NO,ATD 1 60S SAME POS AS 1; MAX DUR 60S Q -GAIN=15 Comments: F375N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 3 ETA-CARINAE WFPC2 IMAGE PC1 F375N,POL CR- 1 800S SAME POS AS 1 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F375N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 4 ETA-CARINAE WFPC2 IMAGE PC1 F469N CR-SPLIT=NO,ATD 1 4S SAME POS AS 1; MAX DUR 4S -GAIN=15 Comments: F469N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 5 ETA-CARINAE WFPC2 IMAGE PC1 F469N,POL CR-SPLIT=NO,ATD 1 12S SAME POS AS 1; MAX DUR 12S Q -GAIN=15 Comments: F469N short exposure with POLQ for Eta Car unsaturated. ------------------------------------------------------------------------------------------------------------------------------------ 6 ETA-CARINAE WFPC2 IMAGE PC1 F469N,POL CR- 1 800S SAME POS AS 1 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F469N long exposure with POLQ for Houmunulus ------------------------------------------------------------------------------------------------------------------------------------ 7 ETA-CARINAE WFPC2 IMAGE PC1 F487N CR-SPLIT=NO,ATD 1 2S SAME POS AS 1; MAX DUR 2S -GAIN=15 Comments: F487N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 8 ETA-CARINAE WFPC2 IMAGE PC1 F487N,POL CR-SPLIT=NO,ATD 1 6S SAME POS AS 1; MAX DUR 6S Q -GAIN=15 Comments: F487N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 ETA-CARINAE WFPC2 IMAGE PC1 F487N,POL CR- 1 400S SAME POS AS 1 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F487N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 10 ETA-CARINAE WFPC2 IMAGE PC1 F502N CR-SPLIT=NO,ATD 1 4S SAME POS AS 1; MAX DUR 4S -GAIN=15 Comments: F502N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 11 ETA-CARINAE WFPC2 IMAGE PC1 F502N,POL CR-SPLIT=NO,ATD 1 10S SAME POS AS 1; MAX DUR 10S Q -GAIN=15 Comments: F502N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 12 ETA-CARINAE WFPC2 IMAGE PC1 F502N,POL CR- 1 400S SAME POS AS 1 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F502N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 13 ETA-CARINAE WFPC2 IMAGE PC1 F673N CR-SPLIT=NO,ATD 1 2S SAME POS AS 1; MAX DUR 2S -GAIN=15 Comments: F673N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 14 ETA-CARINAE WFPC2 IMAGE PC1 F673N,POL CR-SPLIT=NO,ATD 1 4S SAME POS AS 1; MAX DUR 4S Q -GAIN=15 Comments: F673N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 15 ETA-CARINAE WFPC2 IMAGE PC1 F673N,POL CR-SPLIT=NO,ATD 1 160S SAME POS AS 1 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 16 ETA-CARINAE WFPC2 IMAGE PC1 F673N,POL CR-SPLIT=NO,ATD 1 160S SAME POS AS 1 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 101 ETA-CARINAE WFPC2 IMAGE WF2 F375N CR-SPLIT=NO,ATD 1 4S MAX DUR 4S -GAIN=15 Comments: F375N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 102 ETA-CARINAE WFPC2 IMAGE WF2 F375N,POL CR-SPLIT=NO,ATD 1 20S SAME POS AS 101; MAX DUR 20S Q -GAIN=15 Comments: F375N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 103 ETA-CARINAE WFPC2 IMAGE WF2 F375N,POL CR- 1 800S SAME POS AS 101 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F375N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 104 ETA-CARINAE WFPC2 IMAGE WF2 F469N,POL CR-SPLIT=NO,ATD 1 4S SAME POS AS 101; MAX DUR 4S Q -GAIN=15 Comments: F469N short exposure with POLQ for Eta Car unsaturated. ------------------------------------------------------------------------------------------------------------------------------------ 105 ETA-CARINAE WFPC2 IMAGE WF2 F469N,POL CR- 1 800S SAME POS AS 101 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F469N long exposure with POLQ for Houmunulus ------------------------------------------------------------------------------------------------------------------------------------ 106 ETA-CARINAE WFPC2 IMAGE WF2 F487N,POL CR- 1 400S SAME POS AS 101 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F487N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 107 ETA-CARINAE WFPC2 IMAGE WF2 F487N,POL CR-SPLIT=NO,ATD 1 2S SAME POS AS 101; MAX DUR 2S Q -GAIN=15 Comments: F487N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 108 ETA-CARINAE WFPC2 IMAGE WF2 F502N,POL CR-SPLIT=NO,ATD 1 4S SAME POS AS 101; MAX DUR 4S Q -GAIN=15 Comments: F502N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 109 ETA-CARINAE WFPC2 IMAGE WF2 F502N,POL CR- 1 400S SAME POS AS 101 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F502N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 110 ETA-CARINAE WFPC2 IMAGE WF2 F673N CR-SPLIT=NO,ATD 1 1S SAME POS AS 101; MAX DUR 1S -GAIN=15 Comments: F673N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 111 ETA-CARINAE WFPC2 IMAGE WF2 F673N,POL CR-SPLIT=NO,ATD 1 2S SAME POS AS 101; MAX DUR 2S Q -GAIN=15 Comments: F673N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 112 ETA-CARINAE WFPC2 IMAGE WF2 F673N,POL CR-SPLIT=NO,ATD 1 100S SAME POS AS 101 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 113 ETA-CARINAE WFPC2 IMAGE WF2 F673N,POL CR-SPLIT=NO,ATD 1 100S SAME POS AS 101 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 201 ETA-CARINAE WFPC2 IMAGE WF3 F375N CR-SPLIT=NO,ATD 1 4S MAX DUR 4S -GAIN=15 Comments: F375N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 202 ETA-CARINAE WFPC2 IMAGE WF3 F375N,POL CR-SPLIT=NO,ATD 1 20S SAME POS AS 201; MAX DUR 20S Q -GAIN=15 Comments: F375N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 203 ETA-CARINAE WFPC2 IMAGE WF3 F375N,POL CR- 1 800S SAME POS AS 201 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F375N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 204 ETA-CARINAE WFPC2 IMAGE WF3 F469N,POL CR-SPLIT=NO,ATD 1 4S SAME POS AS 201; MAX DUR 4S Q -GAIN=15 Comments: F469N short exposure with POLQ for Eta Car unsaturated. ------------------------------------------------------------------------------------------------------------------------------------ 205 ETA-CARINAE WFPC2 IMAGE WF3 F469N,POL CR- 1 800S SAME POS AS 201 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F469N long exposure with POLQ for Houmunulus ------------------------------------------------------------------------------------------------------------------------------------ 206 ETA-CARINAE WFPC2 IMAGE WF3 F487N,POL CR-SPLIT=NO,ATD 1 2S SAME POS AS 201; MAX DUR 2S Q -GAIN=15 Comments: F487N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 9] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 207 ETA-CARINAE WFPC2 IMAGE WF3 F487N,POL CR- 1 400S SAME POS AS 201 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F487N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 208 ETA-CARINAE WFPC2 IMAGE WF3 F502N,POL CR-SPLIT=NO,ATD 1 4S SAME POS AS 201; MAX DUR 4S Q -GAIN=15 Comments: F502N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 209 ETA-CARINAE WFPC2 IMAGE WF3 F502N,POL CR- 1 400S SAME POS AS 201 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F502N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 210 ETA-CARINAE WFPC2 IMAGE WF3 F673N CR-SPLIT=NO,ATD 1 1S SAME POS AS 201; MAX DUR 1S -GAIN=15 Comments: F673N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 211 ETA-CARINAE WFPC2 IMAGE WF3 F673N,POL CR-SPLIT=NO,ATD 1 2S SAME POS AS 201; MAX DUR 2S Q -GAIN=15 Comments: F673N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 212 ETA-CARINAE WFPC2 IMAGE WF3 F673N,POL CR-SPLIT=NO,ATD 1 100S SAME POS AS 201 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 213 ETA-CARINAE WFPC2 IMAGE WF3 F673N,POL CR-SPLIT=NO,ATD 1 100S SAME POS AS 201 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 300 ETA-CARINAE WFPC2 IMAGE WF4 F218W CR-SPLIT=NO,ATD 1 30S MAX DUR 30S -GAIN=15 Comments: F218W short exposure for Eta Car in UV ------------------------------------------------------------------------------------------------------------------------------------ 301 ETA-CARINAE WFPC2 IMAGE WF4 F375N CR-SPLIT=NO,ATD 1 4S SAME POS AS 300; MAX DUR 4S -GAIN=15 Comments: F375N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 302 ETA-CARINAE WFPC2 IMAGE WF4 F375N,POL CR-SPLIT=NO,ATD 1 20S SAME POS AS 300; MAX DUR 20S Q -GAIN=15 Comments: F375N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 10] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 303 ETA-CARINAE WFPC2 IMAGE WF4 F375N,POL CR- 1 800S SAME POS AS 300 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F375N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 304 ETA-CARINAE WFPC2 IMAGE WF4 F469N,POL CR-SPLIT=NO,ATD 1 4S SAME POS AS 300; MAX DUR 4S Q -GAIN=15 Comments: F469N short exposure with POLQ for Eta Car unsaturated. ------------------------------------------------------------------------------------------------------------------------------------ 305 ETA-CARINAE WFPC2 IMAGE WF4 F469N,POL CR- 1 800S SAME POS AS 300 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES,CR- TOLERANCE=0.2 Comments: F469N long exposure with POLQ for Houmunulus ------------------------------------------------------------------------------------------------------------------------------------ 306 ETA-CARINAE WFPC2 IMAGE WF4 F487N,POL CR-SPLIT=NO,ATD 1 2S SAME POS AS 300; MAX DUR 2S Q -GAIN=15 Comments: F487N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 307 ETA-CARINAE WFPC2 IMAGE WF4 F487N,POL CR- 1 400S SAME POS AS 300 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F487N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 308 ETA-CARINAE WFPC2 IMAGE WF4 F502N,POL CR-SPLIT=NO,ATD 1 4S SAME POS AS 300; MAX DUR 4S Q -GAIN=15 Comments: F502N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 309 ETA-CARINAE WFPC2 IMAGE WF4 F502N,POL CR- 1 400S SAME POS AS 300 Q SPLIT=DEF,ATD- GAIN=15,CLOCKS= YES Comments: F502N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 310 ETA-CARINAE WFPC2 IMAGE WF4 F673N CR-SPLIT=NO,ATD 1 1S SAME POS AS 300; MAX DUR 1S -GAIN=15 Comments: F673N exposure without polaroid for position reference. ------------------------------------------------------------------------------------------------------------------------------------ 311 ETA-CARINAE WFPC2 IMAGE WF4 F673N,POL CR-SPLIT=NO,ATD 1 2S SAME POS AS 300; MAX DUR 2S Q -GAIN=15 Comments: F673N short exposure with POLQ for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 11] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 312 ETA-CARINAE WFPC2 IMAGE WF4 F673N,POL CR-SPLIT=NO,ATD 1 100S SAME POS AS 300 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 313 ETA-CARINAE WFPC2 IMAGE WF4 F673N,POL CR-SPLIT=NO,ATD 1 100S SAME POS AS 300 Q - GAIN=15,CLOCKS= YES Comments: F673N long exposure with POLQ for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 314 ETA-CARINAE WFPC2 IMAGE WF4 F953N CR-SPLIT=NO,ATD 1 4S SAME POS AS 300 -GAIN=15 Comments: F953N short exposure without polaroid for Eta Car unsaturated ------------------------------------------------------------------------------------------------------------------------------------ 315 ETA-CARINAE WFPC2 IMAGE WF4 F953N CR-SPLIT=NO,ATD 1 80S SAME POS AS 300 -GAIN=15 Comments: F953N exposure without polaroid for Homunculus ------------------------------------------------------------------------------------------------------------------------------------ 6518( 3) - 02/16/96 12:22 - [ 12] Summary Form for Proposal 6518 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ATD-GAIN=15 CLOCKS=YES CR-SPLIT=DEF CR-TOLERANCE=0.2 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category INTERSTELLAR MEDIUM ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements POS TARG +8.0,+8.0; MAX DUR 10S SAME POS AS 1; MAX DUR 60S SAME POS AS 1 SAME POS AS 1; MAX DUR 4S SAME POS AS 1; MAX DUR 12S SAME POS AS 1; MAX DUR 2S SAME POS AS 1; MAX DUR 6S SAME POS AS 1; MAX DUR 10S SAME POS AS 101; MAX DUR 20S SAME POS AS 101 SAME POS AS 101; MAX DUR 4S SAME POS AS 101; MAX DUR 2S SAME POS AS 101; MAX DUR 1S SAME POS AS 201; MAX DUR 20S SAME POS AS 201 SAME POS AS 201; MAX DUR 4S SAME POS AS 201; MAX DUR 2S SAME POS AS 201; MAX DUR 1S MAX DUR 30S SAME POS AS 300; MAX DUR 4S SAME POS AS 300; MAX DUR 20S SAME POS AS 300 SAME POS AS 300; MAX DUR 2S SAME POS AS 300; MAX DUR 1S ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F375N F375N,POLQ F469N F469N,POLQ F487N F487N,POLQ F502N F502N,POLQ F673N F673N,POLQ F218W F953N ------------------------------------------------------------------------------------------------------------------------------------ Target Names ETA-CARINAE ------------------------------------------------------------------------------------------------------------------------------------