! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 6064,v 6.1 1995/11/21 14:53:42 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: Dustin Manning ! Phone: 410 338-4456 , E-mail: manning@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Date generated: Sun Dec 18 18:57:38 EST 1994 ! Proposal_Information ! Section 4 Title: Companions to Tc-Deficient S and MS Stars Proposal_Category: GO Scientific_Category: Cool Stars Cycle: 5 Investigators PI_name: Thomas B. Ake PI_Institution: Computer Sciences Corporation CoI_Name: Jeffery A. Brown CoI_Institution: University of Washington Contact: ! Y or N (designate at most one contact) CoI_Name: Hollis R. Johnson CoI_Institution: Indiana University Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) S and MS stars are peculiar red giant stars whose surface composition has been enriched in s-process elements and carbon. Most are thought to be asymptotic giant branch (AGB) stars that have undergone the third dredge-up. One subgroup of these, the objects without technetium, may instead be mass- transfer binaries where the abundance anomalies of the current red-giant primary may be due to accretion from the present secondary (a white dwarf) at an earlier epoch when the white dwarf was itself an AGB star. We propose to perform a survey of those objects whose previous IUE and He I Lambda10830 observations indicate that a hot source is definitely present. The HST data will allow us to distinguish between scenarios of enhanced far-UV photospheric emission from the red giant and hot white dwarf companions for these objects. Questions ! Free format text (please update) Observing_Description: The targets will be acquired using Side 2. Medium resolution exposures of Mg II will be taken in three pieces and coaligned to take out geomagnetic motions. Rapid read out exposures will be taken in low resolution from 1150-1575A. Real_Time_Justification: The low dispersion exposures will have counts near the detector limit and thus should be scheduled when HST is between +/-25D geomagnetic latitude to reduce the overall background noise. These exposures also cover the O I 1304A region and the geocoronal contamination to the lines needs to be minimized. If the UV excess in these objects arises from the chromosphere of the red giant, the stellar O I will be an important diagnostic as to the level of chromospheric contribution. Calibration_Justification: None. ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: HD191226 Alternate_Names: GSC2683-00716 Description: STAR,R N OR S TYPES Position: RA = 20H 07M 26.50S +/- 0.01S, DEC = 36D 34' 2.9" +/- 0.1", Equinox: J2000 RV_or_Z: RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: 2000.000 Annual_Parallax: Flux: V=7.19, B-V=1.80 ! Include at least V and B-V Comments: Coordinates are from Hipparcos INCA Target_Number: 2 Target_Name: HD49368 Alternate_Names: V613Mon,GSC0156-00001 Description: STAR,R N OR S TYPES Position: RA = 06H 48M 22.29S +/- 0.02S, DEC = 05D 32' 30.6" +/- 0.3", PLATE-ID = 03QX Equinox: 2000 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: V=7.30 +/- 0.41, B-V=1.78 ! Include at least V and B-V Comments: Coordinates are from GSC ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits ! Section 6 Visit_Number:1 Visit_Requirements:BETWEEN 25-JUL-95 AND 10-SEP-95 ! 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