9679( 2) - 06/20/02 10:19 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9679 Version: 2 Check-in Date: 20-Jun-2002 10:19:10 1.Proposal Title: The Structure of Eta Carinae's Central Core ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO/DD 10 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Ed Nelan Space Telescope Science Institute CoI: Ms. Debra Wallace Georgia State University N CoI: Mr. Russell Makidon Space Telescope Science Institute N CoI: Dr. Douglas Gies Georgia State University N CoI: Dr. Todd Henry Georgia State University N CoI: Dr. Anthony Moffat University of Montreal N CoI: Dr. Nino Panagia Space Telescope Science Institute N CoI: Dr. Nolan Walborn Space Telescope Science Institute N CoI: Dr. Mark Clampin Space Telescope Science Institute N CoI: Dr. Antonella Nota Space Telescope Science Institute N ------------------------------------------------------------------------------------ 5. Abstract We return to Eta Carinae. The extreme luminous blue variable Eta Carinae is one of the most studied yet mysterious astronomical objects. In March 2002 we observed it at a higher angular resolution that ever before with HST's FGS1r. A high quality interferogram was obtained of the object's central core. The data are best modeled as TWO point sources embedded in significant nebulosity. The sources differ in brightness by less than one magnitude and have a projected angular separation of about 33 mas. The goal of this DD proposal is to re-observe Eta Carinae with HST/FGS1r but at different, yet specific, spacecraft roll angles. This will change the projection angle of Eta Car within the FGS and will allow us to confirm and refine our two point source model of Eta Car's central core. ------------------------------------------------------------------------------------ 9679( 2) - 06/20/02 10:19 - [ 2] Observations Description ------------------------ Transfer Mode observations of Eta Carinae will be made at two specific spacecraft orientations. Each visit will be one orbit. Due to the brightness of the target, the F5ND attenuator will be used. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9679( 2) - 06/20/02 10:19 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD93308 STAR RA=10H 45M 3.591S +/- 1S, DEC=- J2000 V = 6.21+/-0.1 59D 41' 4.300" +/- 1" Coordinate Source: GUIDE_STAR_CATALOG Comments: LBV, Eta Carinae 9679( 2) - 06/20/02 10:19 - [ 4] Visit: 01 Visit Priority: Visit Requirements: SCHED 100% BETWEEN 11-Jul-2002 AND 15-Jul-2002 ORIENT 121D TO 122D GROUP 01, 02 WITHIN 1 D 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 HD93308 FGS TRANS 1 F5ND STEP-SIZE=0.5,SCANS=23 1 1480 S POS TARG 0.0, 0.0 SEQ 10-20 NON-INT Comments: scan length = 1.3" ------------------------------------------------------------------------------------------------------------------------------------ 20 HD93308 FGS TRANS 1 F5ND STEP-SIZE=2.5,SCANS=4 1 240 S SAME POS AS 10 Comments: scan length = 6.0" ------------------------------------------------------------------------------------------------------------------------------------ 9679( 2) - 06/20/02 10:19 - [ 5] Visit: 02 Visit Priority: Visit Requirements: SCHED 100% ORIENT 151D TO 152D 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 HD93308 FGS TRANS 1 F5ND STEP-SIZE=0.5,SCANS=23 1 1480 S POS TARG 0.0, 0.0 SEQ 10-20 NON-INT Comments: scan length = 1.3" ------------------------------------------------------------------------------------------------------------------------------------ 20 HD93308 FGS TRANS 1 F5ND STEP-SIZE=2.5,SCANS=4 1 240 S SAME POS AS 10 Comments: scan length = 6.0" ------------------------------------------------------------------------------------------------------------------------------------ 9679( 2) - 06/20/02 10:19 - [ 6] Summary Form for Proposal 9679 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations FGS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TRANS ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters STEP-SIZE=0.5 SCANS=23 SCANS=4 STEP-SIZE=2.5 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO/DD ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100% BETWEEN 11-Jul-2002 AND 15-Jul-2002 ORIENT 121D TO 122D GROUP 01, 02 WITHIN 1 D POS TARG 0.0, 0.0 SEQ 10-20 NON-INT SAME POS AS 10 SCHED 100% ORIENT 151D TO 152D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F5ND ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD93308 ------------------------------------------------------------------------------------------------------------------------------------