! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 5871,v 7.1 1995/09/13 18:37:44 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: Karla Peterson ! Phone: 410 338-4774, E-mail: peterson@stsci.edu ! ! This partially completed template was generated from your Phase I proposal. ! Proposal_Information ! Section 4 Title: Rapid UV Variability: The Contribution of Flare Heating in Active Dwarf Atmospheres Proposal_Category: GO Scientific_Category: Cool Stars Cycle: 5 Investigators PI_name: Dr. Steven Saar PI_Institution: Smithsonian Astrophysical Observatory CoI_Name: Dr. Jay Bookbinder CoI_Institution: Smithsonian Astrophysical Observatory Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) The question of the contribution of flares and microflares to the non-radiatively heated outer atmospheres of late-type stars has been studied with at best very limited success for over a decade using IUE, a variety of X--ray satellites, and ground-based studies. However, HST presents the possibility for being able to place a firm lower limit on the fraction of the transition region flux that is the direct result of short timescale events. Our analysis of HST data on one M dwarf shows that up to 60 percent attributable to stellar flares and microflares. This leaves little room for the traditional ``quiescent" emission. Such a result, if confirmed for other stars, promises to revitalize the study of these atmospheres, with the recognition that the atmospheres are far more dynamic than static. We are now proposing to observe 3 new targets, including a very youthful solar analog and a fully convective star. Questions ! Free format text (please update) Observing_Description: The GHRS G140L grating (LSA), centered at 1523 Angstrom, will be employed to study a series of both chromospheric lines and transition region lines. This setting will allow us to study variability in : chromospheric C I (1561 and 1657 Angstroms), and the Si IV (1400 Angstrom) and C IV (1550 Angstrom) and He II (1640 Angstrom) lines for the transition region. That C IV and Si IV are formed at very similar temperatures, can be used to help confirm our variability analysis. The G140L grating of the GHRS was selected primarily because of its higher sensitivity and lower scattered light below 1500 Angstrom, where most of the lines lie, enabling us to take shorter observations than had we used the FOS. IUE measurement have established fluxes at earth of f_ C IV = 1.9 * 10^-13 ergs cm^-2 s^-1 AA^-1 for HD 129333 (Dorren & Guinan 1994), 3.2 * 10^-13 ergs cm^-2 s^-1 AA^-1 for HD 82558 (Saar, unpublished) and 2.3 * 10^-13 ergs cm^-2 s^-1 AA^-1 for YZ CMi (Linsky et al. 1982). With an efficiency of 67* 10^11 counts s^-1 diode^ -1 per incident erg cm^-2 s^-1 at C IV for the G140L, we should obtain 1.3, 2.1, and 1.9 counts s^-1 at C IV for HD 129333, HD 82558, and YZ CMi, respectively. Since during flares this value can increase by a factor of 10 or more, we should have ample counts to study flares and microflares in these stars. Our request of 4, 6 and 6 orbits, respectively, should yield approximately 4.5, 4 and 4 hours, respectively, of on-target observations. Real_Time_Justification: Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: We plan an extensive suite of coordinated observations for our targets. Optical spectra of chromospheric diagnostics as well as photometry are planned. We will attempt doppler imaging of HD 129333, and magnetic doppler imaging (e.g., Saar et al. 1992) of HD 82558. Magnetic field measurements of YZ CMi will be carried out from the IRTF with their cryogenic IR echelle. Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: HD129333 Alternate_Names: EK-DRA,GSC4176-00540 Description: STAR,G V-IV Position: RA = 14H 39M 0.52S +/- 0.05S, DEC = 64D 17' 30.3" +/- 0.3", PLATE-ID = 00A9 Equinox: J2000 RV_or_Z: V = -31.0 RA_PM: -0.0236 ! Units are seconds of time per year Dec_PM: -0.007 ! Units are seconds of arc per year Epoch: 1983.291 Annual_Parallax: 0.032 +/- 0.005 Flux: V = 7.54 +/- 0.10 ! Include at least V and B-V B-V = 0.61 +/- 0.02 F-LINE(1550.0) = 1.9 +/- 1.0 E-13 W-LINE(1550.0) = 1.0 +/- 0.2 Comments: THIS IS A CVZ TARGET. Coordinates are from GSC Target_Number: 2 Target_Name: HD82558 Alternate_Names: LQ-HYA,GSC5464-00875 Description: STAR,K V-IV Position: RA = 09H 32M 25.86S +/- 0.04S, DEC = -11D 11' 5.7" +/- 0.6", PLATE-ID = 0447 Equinox: J2000 RV_or_Z: V = 14.0 RA_PM: -0.0184 ! Units are seconds of time per year Dec_PM: 0.026 ! Units are seconds of arc per year Epoch: 1983.198 Annual_Parallax: 0.080 +/- 0.012 Flux: V = 7.79 +/- 0.10 ! Include at least V and B-V B-V = 0.92 +/- 0.03 F-LINE(1550.0) = 3.2 +/- 1.0 E-13 W-LINE(1550.0) = 1.0 +/- 0.2 Comments: Coordinates are from GSC Target_Number: 3 Target_Name: YZ-CMI Alternate_Names: GL-285,GSC0183-02190 Description: STAR,M V-IV Position: RA = 07H 44M 40.50S +/- 0.01S, DEC = 03D 33' 15.3" +/- 0.2", PLATE-ID = 02V4 Equinox: J2000 RV_or_Z: V = 18.0 RA_PM: -0.0267 ! Units are seconds of time per year Dec_PM: -0.455 ! Units are seconds of arc per year Epoch: 1985.050 Annual_Parallax: 0.165 +/- 0.006 Flux: V = 11.2 +/- 0.20 ! Include at least V and B-V B-V = 1.59 +/- 0.05 F-LINE(1550.0) = 2.3 +/- 1.0 E-13 W-LINE(1550.0) = 1.0 +/- 0.2 Comments: Coordinates are from GSC Visits ! Section 6 Visit_Number: 01 Visit_Requirements: CVZ BETWEEN 15-JAN-1996 AND 15-JUL-1996 On_Hold_Comments: Visit_Comments: "BETWEEN" DATES NOT AN ABSOLUTE REQUIREMENT, BUT HIGHLY DESIREABLE FOR COORDINATION WITH GROUND-BASED OBSERVATIONS Exposure_Number: 10 ! Section 6.5 Target_Name: HD129333 Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-N1 Wavelength: Optional_Parameters: BRIGHT=RETURN, SEARCH-SIZE=3 Number_of_Iterations: 1 Time_Per_Exposure: 114.75S Special_Requirements: ONBOARD ACQ FOR 20-40; SEQ 10-40 NON-INT Comments: PLEASE NOTIFY P.I. WHEN DATES ARE SCHEDULED OR CHANGED (FOR COORDINATED OBSERVATIONS) IN ACQ EXPECT ABOUT 10 CTS/S, HENCE STEP-TIME 12.75 SEC Exposure_number: 20 Target_Name: HD129333 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G140L Wavelength: 1523.0 Optional_Parameters: SAMPLE-TIME=1.0 Number_of_iterations: 2 Time_Per_Exposure: 4796S Special_Requirements: Comments: THESE EXPOSURES SHOULD BE SCHEDULED WHEN THE TARGET IS IN THE CVZ. Exposure_number: 40 Target_Name: HD129333 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G140L Wavelength: 1523.0 Optional_Parameters: SAMPLE-TIME=1.0 Number_of_iterations: 2 Time_Per_Exposure: 4796S Special_Requirements: Comments: THESE EXPOSURES SHOULD BE SCHEDULED WHEN THE TARGET IS IN THE CVZ. Visits ! Section 6 Visit_Number: 02 Visit_Requirements: BETWEEN 20-OCT-1995 AND 10-NOV-1995 On_Hold_Comments: Visit_Comments: "BETWEEN" DATES NOT AN ABSOLUTE REQUIREMENT, BUT HIGHLY DESIREABLE FOR COORDINATION WITH GROUND-BASED OBSERVATIONS Exposure_Number: 10 ! Section 6.5 Target_Name: HD82558 Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-N2 Wavelength: Optional_Parameters: BRIGHT=RETURN, SEARCH-SIZE=3 Number_of_Iterations: 1 Time_Per_Exposure: 9S Special_Requirements: ONBOARD ACQ FOR 20 Comments: PLEASE NOTIFY P.I. WHEN DATES ARE SCHEDULED OR CHANGED (FOR COORDINATED OBSERVATIONS) IN ACQ EXPECT ABOUT 9500 CTS/S, HENCE STEP-TIME 1.0 SEC Exposure_number: 20 Target_Name: HD82558 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G140L Wavelength: 1523.0 Optional_Parameters: SAMPLE-TIME=1.0 Number_of_iterations: 5 Time_Per_Exposure: 2545S Special_Requirements: Comments: Visits ! Section 6 Visit_Number: 03 Visit_Requirements: BETWEEN 01-OCT-1995 AND 30-APR-1996 On_Hold_Comments: Visit_Comments: "BETWEEN" DATES NOT AN ABSOLUTE REQUIREMENT, BUT HIGHLY DESIREABLE FOR COORDINATION WITH GROUND-BASED OBSERVATIONS Exposure_Number: 10 ! Section 6.5 Target_Name: YZ-CMI Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-N2 Wavelength: Optional_Parameters: BRIGHT=RETURN, SEARCH-SIZE=3 Number_of_Iterations: 1 Time_Per_Exposure: 90S Special_Requirements: ONBOARD ACQ FOR 20 Comments: PLEASE NOTIFY P.I. WHEN DATES ARE SCHEDULED OR CHANGED (FOR COORDINATED OBSERVATIONS) IN ACQ EXPECT ABOUT 350 CTS/S, STEP-TIME = 10.0 SEC Exposure_number: 20 Target_Name: YZ-CMI Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G140L Wavelength: 1523.0 Optional_Parameters: SAMPLE-TIME=1.0 Number_of_iterations: 5 Time_Per_Exposure: 2545S Special_Requirements: Comments: Data_Distribution ! Defaults indicated; change if desired Medium: 8MM ! 8MM or 6250BPI or 1600BPI Blocking_Factor: 10 ! 10 or 1 ! Only astronomers with very old 9- ! track tape drives should consider ! a blocking factor of 1 Ship_To: PI_Address ! STSCI or PI_Address or ! PI Address from Phase I is: ! ! 60 Garden Street , Cambridge, ! MA 02138 ! ! Ship_Via: UPS ! UPS (2-day) or OVERNIGHT ! Overnight shipping done at PI expense Recipient_Email: ! Needed if Ship_To: is not PI_Address ! ! Let us know what you think of this template and software! ! Please send a list of your likes and dislikes to your Program Coordinator