! File: 4768C.PROP ! Database: PEPDB ! Date: 23-FEB-1994:02:31:04 coverpage: title_1: DYNAMICS AND ENERGY BALANCE IN STELLAR TRANSITION REGIONS title_2: - REPEAT FOR HOPR#66 sci_cat: STELLAR ASTROPHYSICS sci_subcat: COOL STARS proposal_for: RPT/HRS cont_id: 1176 pi_fname: JEFFREY pi_mi: L. pi_lname: LINSKY pi_inst: COLORADO, UNIVERSITY OF pi_country: USA pi_phone: (303)492-7838 keywords_1: STELLAR CHROMOSPHERES, STELLAR TRANSITION REGIONS, F-M keywords_2: DWARF STARS, G-K GIANT STARS, STELLAR ACTIVITY hours_pri: 2.02 num_pri: 1 pi_position: ASTROPHYSICIST ! end of coverpage abstract: line_1: We propose to study the dynamics of stellar transition regions by measuring the line_2: redshifts, indicative of downflows, in lines of C III, C IV, Si IV, and O line_3: IV.The energy balance and heating rates in stellar chromospheres and transition line_4: regions will be derived from an emission measure analysis of emission line line_5: fluxes and densities inferred from density sensitive line ratios. Stars of line_6: interest include dwarf stars of spectral type F-M, active G and K giants, and line_7: RS CVn binary systems. ! ! end of abstract general_form_proposers: lname: BROWN fname: ALEXANDER inst: COLORADO, UNIVERSITY OF country: USA ! lname: LINSKY fname: JEFFREY mi: L. inst: COLORADO, UNIVERSITY OF country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: We intend to observe 9 stars with the HRS with 2 grating settings each at line_2: low dispersion and 4 grating settings each at moderate dispersion. Two targets line_3: (HR 1099 and Capella) are spectroscopic binary systems and are to be observed line_4: at 1 or 2 phases each. HR 1099 is to be observed at a PHI = 0.75 quadrature. line_5: Capella is to be observed at a conjunction (PHI = 0.0 or 0.5) and at a PHI = line_6: 0.25 quadrature. Ephermerides for PHI = 0.0 are line_8: HR 1099: JD (helio) = 2,442,766.069 + 2d.83782E line_9: Capella: JD (helio) = 2,442,039.4 + 104d.0204E line_11: Cycle 1, 2 and 3. ! question: 4 section: 1 line_1: Stellar transition regions can only be observed in the ultraviolet. ! question: 5 section: 1 line_1: Many of these targets are in common with our GTO program "Local line_2: Interstellar Medium and D/H Ratio" or the program "Coronal Flares" for which S. line_3: Maran is the PI. Since these targets are variable and the data from each line_4: program supports the other, we request that observations of the same target for line_5: both programs be contiguous in time with few data gaps. The observations of HR line_6: 1099 and Capella at conjunction and quadrature are to use the orbital radial line_7: velocity differences to seperate the spectra of the component stars. ! question: 7 section: 1 line_1: We have developed extensive computer programs to analyze these spectra line_2: using emission measure and model atmosphere techniques. ! question: 10 section: 1 line_1: Computer analysis codes and postdoctoral research associates to be funded line_2: by the HST GTO program. ! question: 12 section: 1 line_1: The total exposure time for this program assumes the following overhead line_2: times: line_4: ALPHA-CMI 345s line_5: BETA-CET 375s line_6: ALPHA-CEN A 285s line_7: EPSILON-ERI 285s line_8: HR 1099 255s line_9: ALPHA-AUR 690s (total for the two phases) line_10: BETA-DRA 435s line_11: AU-MIC 255s line_12: LAMBDA-AND 255s ! question: 13 section: 1 line_1: We propose to study the dynamics of stellar transition regions by line_2: measuring the redshifts, indicative of downflows, in lines of C III, Si III, C line_3: IV, Si IV, and O IV. The energy balance and heating rates in stellar line_4: chromospheres and transition regions will be derived from an emission measure line_5: analysis of emission line fluxes and densities inferred from density sensitive line_6: line ratio. Stars of interest include dwarf stars of spectral type F-M, line_7: active G and K giants, and RS CVn binary systems. ! !end of general form text general_form_address: lname: LINSKY fname: JEFFREY mi: L. category: PI inst: JILA, UNIVERSITY OF COLORADO addr_1: CAMPUS BOX 440 city: BOULDER state: CO zip: 80309 country: USA phone: 303-492-7838 telex: 755842JILA ! ! end of general_form_address records fixed_targets: targnum: 7 name_1: HD159181 name_2: BETA-DRA descr_1: A,138 pos_1: RA=17H29M18.01S+/-.01S, pos_2: DEC=+52D20'15.65"+/-.1" equinox: 1950 pm_or_par: Y pos_epoch_bj: B pos_epoch_yr: 1950.00 ra_pm_val: -0.002400 ra_pm_unct: 0.000067 dec_pm_val: 0.0130 dec_pm_unct: 0.0010 an_prlx_val: 0.0130 rv_or_z: V=-20 comment_1: RA_PM_VAL CHANGED TO FIT STSCI comment_2: SOFTWARE INACCURACY (NOV 91) fluxnum_1: 1 fluxval_1: V=2.79 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: HD159181 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 5S priority: 2 param_1: SEARCH-SIZE=3 param_2: FAINT=150 req_1: ONBOARD ACQ FOR 2; req_2: CYCLE 1/ 1-12; req_3: GROUP 1-12 NO GAP; req_4: SEQ 1-2 comment_1: STEP TIME = 0.2 SEC comment_2: FAINT UPDATED NOV 91. ! linenum: 2.000 targname: HD159181 config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S fluxnum_1: 1 priority: 2 req_1: ONBOARD ACQ FOR 9-12; comment_1: STEP-TIME=1.6SEC comment_2: CENTER IN LSA AFTER NEW DEFCAL ! linenum: 9.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G160M wavelength: 1550 num_exp: 1 time_per_exp: 56S priority: 2 param_1: STEP-PATT=5 req_1: CALIB FOR 10 NO SLEW; req_2: SEQ 9-10 NON-INT; ! linenum: 10.000 targname: HD159181 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1550 num_exp: 3 time_per_exp: 300S priority: 1 param_1: STEP-PATT=5 ! linenum: 11.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G160M wavelength: 1400 num_exp: 1 time_per_exp: 56S priority: 2 param_1: STEP-PATT=5 req_1: CALIB FOR 12 NO SLEW; req_2: SEQ 11-12 NON-INT; ! linenum: 12.000 targname: HD159181 config: ^ opmode: ^ aperture: 2.0 sp_element: G160M wavelength: 1400 num_exp: 6 time_per_exp: 300S priority: ^ param_1: ^ ! ! end of exposure logsheet ! No scan data records found