! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 5808,v 1.1 1994/12/14 19:28:26 pepsa Exp $ ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: n/a ! Phone: n/a , E-mail: n/a ! ! This partially completed template was generated from a Phase I proposal. ! Name of Phase I Proposal: plavec-042.prop ! Date generated: Wed Dec 14 14:28:19 EST 1994 ! Proposal_Information ! Section 4 Title: Symbiotic Binaries: Nature of the Hot Components Proposal_Category: AR Scientific_Category: Hot Stars Cycle: 5 Investigators PI_name: Mirek Plavec PI_Institution: University of California, Los Angeles CoI_Name: Charles Keyes CoI_Institution: Space Telescope Science Institute Contact: ! Y or N (designate at most one contact) CoI_Name: Ivan Hubeny CoI_Institution: USRA, NASA Goddard Space Flight Center, Greenbelt Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) We propose to rediscuss the existing HST observations of two symbiotic binaries, namely AG Pegasi and CI Cygni. These spectra were obviously taken for the purpose of studying the emission lines, typical for such systems; also, many spectra of AG Pegasi were obtained for calibration purposes. We propose to use this material primarily for an investigation of the continuous and absorption-line spectra, which should enable us to decide upon the nature of the hot components in these two binaries. This project parallels our own observing proposal, originally submitted for Cycle 3 and accepted by the TAC as supplemental (but not realized), and re-submitted now for Cycle 5 under the title ``Nature of the Hot Components of Symbiotic Binaries''. The spectra of AG Pegasi, taken for wavelength calibration, are of very good quality, and are usable for the study of the continuum and probably also of the absorption lines. We will attempt to extract as much information from all the existing spectra as we can for our modeling of the hot components. These can be either accreting white degenerate dwarfs, subdwarfs akin to the nuclei of planetary nebulae, or accretion disks surrounding non- degenerate low-mass stars. In the past, only indirect or insufficient clues have been used to resolve this question. We also plan to study the emission line profiles in order to understand their origin. We possess state-of-the-art modeling techniques for stellar atmospheres, accretion disks, and emission lines. Questions ! Free format text (please update) Observing_Description: Real_Time_Justification: Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number: Target_Name: Alternate_Names: Description: Position: ! Most common specification format is ! RA=0H 0M 0.00S +/- 0S, ! DEC=0D 0' 0.0" +/- 0", ! PLATE-ID=0000 Equinox: RV_or_Z: RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: ! Include at least V and B-V Comments: Solar_System_Targets ! Section 5.2 Target_Number: Target_Name: Description: Level_1: ! Satellite of Sun Level_2: ! Satellite of Level_1 Level_3: ! Satellite of Level_2 Window: Flux: ! Include at least V and B-V Comments: Generic_Targets ! Section 5.3 Target_Number: Target_Name: Description: Criteria: Flux: Comments: Scan_Data ! Appendix B Scan_Number: FGS_Scan: Cont_or_Dwell: Dwell_Points: Dwell_Secs: Scan_Width: Scan_Length: Sides_Angle: Number_Lines: Scan_Rate: First_Line_PA: Scan_Frame: Length_Offset: Width_Offset: ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits ! Section 6 Visit_Number: Visit_Requirements: ! Section 7.1 ! Uncomment or copy visit level special requirements needed ! Most of these requirements (including ORIENT) will limit scheduling ! PCS MODE [Fine | Gyro] ! GUIDing TOLerance ! ORIENTation TO ! ORIENTation TO FROM ! ORIENTation TO FROM NOMINAL ! SAME ORIENTation AS ! CVZ ! PARallel ! AFTER [BY [TO ]] ! AFTER ! BEFORE ! BETWEEN AND ! GROUP WITHIN