!*NOTE* This file contains revised text written by the PI after the proposal ! was set to flight scheduling. There is no difference in the target list ! or exposure logsheet. Therefore, this file replaces the "old" file in PLIB. ! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 6137,v 14.1 1995/09/21 15:05:00 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: Christian Ready ! Phone: 410 338-4546 , E-mail: ready@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Date generated: Mon Dec 19 08:44:42 EST 1994 ! Proposal_Information ! Section 4 Title: A Search for Brown Dwarfs and Luminous Young Planets in the Hyades Proposal_Category: GO Scientific_Category: Cool Stars Cycle: 5 Investigators PI_name: Edward Rosenthal PI_Institution: IUE Observatory, Code 684.9, Bldg 21, Goddard Space Flight Center CoI_Name: Todd Henry CoI_Institution: Space Telescope Science Institute Contact: Y CoI_Name: Michael Skrutskie CoI_Institution: University of Massachusetts/Amherst Contact: N Abstract: ! Free format text (please update) We propose a photometric search for luminous, young, massive planets and very low-temperature (~ 1200 K) brown dwarfs as companions to 20 low-mass stars in the Hyades (during Cycle 5, we will observe the faintest 8 of these stars). Such massive planets and brown dwarfs in this cluster should be clearly distinguishable from very low-mass stars in both effective surface temperature and luminosity. The Planetary Camera will be used to obtain 1-Mum images of the primary stars in order to search for faint companions. We are undertaking a complementary project at the NASA IRTF involving imaging at J (1.2 Mum), H (1.6 Mum), and K (2.2 Mum) for a sample of 75 low-mass Hyades stars, including the 20 stars proposed here. The IRTF search will reach K=18, while this HST search will reach I=23-24. Cool substellar companions could have I-K >= 8, so the IRTF search will likely be more sensitive, but will also have much poorer spatial resolution. Since a large fraction of stellar companions are within 10 AU of their primary (Henry 1991), and at the distance of the Hyades 0."1 ~ 5 AU, the guaranteed 0."1 spatial resolution of the PC is crucial for this project. A very similar HST Cycle 4 SNAP program is already underway (PI: N. Reid) for I-band imaging of a sample of 35 low-mass Hyades stars to I=20. Our program will go deeper by 3-4 magnitudes, by using the 1-Mum (vs I- band) filter and by taking longer effective exposures. This push to fainter luminosities is substantial, especially considering the large uncertainties associated with current brown dwarf models. Questions ! Free format text (please update) Observing_Description: We propose to image the environments of 8 low-mass M dwarfs in the Hyades cluster. We will image using the Planetary Camera and the F1042M filter. Each target star will be imaged 3 times in a single orbit; the 8 target stars will require 8 orbits of HST observing time. Real_Time_Justification: None. Supporting ground-based observations have been obtained with the NASA IRTF, Mauna Kea, October 12-14, 1994 as part of an ongoing survey of ~75 low-mass Hyades stars. These images are in the near-infrared, at 1.2 Mum, 1.6 Mum, and 2.2 Mum. Because they will be closer to the peak of the spectral energy distribution of possible very cool companions, they will likely go deeper than the HST observations proposed here, but with a trade-off of much poorer spatial resolution. Since most companions are expected to fall within ~ 0."25 at the Hyades distance (Henry 1991), the diffraction-limited spatial resolution of HST is critical to the success of this program. Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Each target will take 1 orbit and will presumably be 1 SU for 8 SUs total. A link should be created separating the first SU from the 7 subsequent SUs by >= 1 month to allow the initial data to be evaluated before the remainder of the SUs execute. If at all possible, the first SU should execute during the first Cycle 5 visibility period (last 2 weeks of July 1995) so that initial data can be obtained in support of a Cycle 6 Phase I continuation proposal and for use in preparing for a NASA IRTF observing run during Fall 1995. A Scan_data form is included in this template for use in a spatial scan should that prove more efficient for the observations (of course it represents only one possibility for how a spatial scan could be done). Any spatial scan should be done as closely as possible to the POS TARG setups listed here. Three 10-min exposures/visit are preferable to the four 5-min ones listed here, but a further assessment is needed of how cosmic rays will impact the images and whether 3 vs 4 images/star will make a difference with the psf modeling. All coordinates should be double-checked before any SUs execute. There is a discrepancy in the Starview database in the coordinates for the planned vs executed exposures from the Reid 05353 proposal. All 8 of these targets are duplicated in the 05353 proposal. The coordinates listed here are the J2000 *planned* exposures from 05353 in Starview, which appear to be the precessed B1950 coordinates from Reid, 1992, MNRAS, 257, 257. Why some different coordinates are listed in Starview for the 05353 SUs that have already executed must be resolved. *** UPDATE *** 02 June 1995: coords should be OK. Also, this template now uses 3 10-min exposures. -- EDR Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: RHY047 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 04M 10.266S +/- 0.06S, DEC= +15D 48' 21.533" +/- 1.0" Equinox: J2000 RA_PM: 0.1280 +/- 0.0000 Dec_PM: -0.0190 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 18.42, B-V = 2.10 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 Target_Number: 2 Target_Name: RHY138 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 17M 31.783S +/- 0.06S, DEC= +16D 57' 0.859" +/- 1.0" Equinox: J2000 RA_PM: 0.1280 +/- 0.0000 Dec_PM: -0.0190 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 18.6, B-V = 2.10 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 Target_Number: 3 Target_Name: RHY230 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 26M 18.733S +/- 0.06S, DEC= +17D 03' 3.043" +/- 1.0" Equinox: J2000 RA_PM: 0.0990 +/- 0.0000 Dec_PM: -0.0210 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 18.00, B-V = 2.25 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 Target_Number: 4 Target_Name: RHY240 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 27M 6.138S +/- 0.06S, DEC= +16D 25' 47.859" +/- 1.0" Equinox: J2000 RA_PM: 0.1040 +/- 0.0000 Dec_PM: -0.0260 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 17.68, B-V = 2.22 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 Target_Number: 5 Target_Name: RHY281 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 30M 3.920S +/- 0.06S, DEC= +16D 04' 8.944" +/- 1.0" Equinox: J2000 RA_PM: 0.0820 +/- 0.0000 Dec_PM: -0.0390 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 18.15, B-V = 2.61 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 Target_Number: 6 Target_Name: RHY386 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 38M 58.221S +/- 0.06S, DEC= +15D 39' 42.775" +/- 1.0" Equinox: J2000 RA_PM: 0.1070 +/- 0.0000 Dec_PM: -0.0210 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 18.69, B-V = 2.11 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 Target_Number: 7 Target_Name: RHY390 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 39M 44.645S +/- 0.06S, DEC= +18D 05' 42.699" +/- 1.0" Equinox: J2000 RA_PM: 0.0990 +/- 0.0000 Dec_PM: -0.0210 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 18.10, B-V = 2.49 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 Target_Number: 8 Target_Name: RHY403 Alternate_Names: Description: STAR, M V-IV Position: RA=04H 40M 36.723S +/- 0.06S, DEC= +16D 38' 10.086" +/- 1.0" Equinox: J2000 RA_PM: 0.0840 +/- 0.0000 Dec_PM: -0.0240 +/- 0.0000 Epoch: B1994.00 Annual_Parallax: 0.0210 +/- 0.0020 Flux: V = 17.87, B-V = 1.92 Comments: from RHY sample; Cycle 4 SNAP proposal 05353 ! Scan_Data ! Appendix B ! Scan_Number: 1 ! FGS_Scan: ! Cont_or_Dwell: D ! Dwell_Points: 2 ! Dwell_Secs: 300 ! Scan_Width: 0.2500 ! Scan_Length: 0.2500 ! Sides_Angle: 270.0000 ! Number_Lines: 2 ! Scan_Rate: ! First_Line_PA: 90.0000 ! Scan_Frame: S/C ! 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: 01 Visit_Requirements: PCS MODE Fine ! Section 7.1 BETWEEN 01-JUL-95 AND 31-JUL-95 ! 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