! File: 4234C.PROP ! Database: PEPDB ! Date: 20-FEB-1994:18:30:50 coverpage: title_1: DYNAMICS AND ENERGY BALANCE IN STELLAR TRANSITION REGIONS - AU MIC sci_cat: STELLAR ASTROPHYSICS sci_subcat: COOL STARS proposal_for: GTO/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: 4.54 num_pri: 2 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: 8 name_1: AU-MIC name_2: GL803 name_3: GSC7457-0641 descr_1: M 1.6E V STAR; FLARE STAR pos_1: RA = 20H 45M 08.95S +/- 0.3", pos_2: DEC = -31D 20' 17.8" +/- 0.3" equinox: 2000 pm_or_par: Y pos_epoch_bj: B pos_epoch_yr: 1974.50 ra_pm_val: 0.021133 ra_pm_unct: 0.001400 dec_pm_val: -0.3480 dec_pm_unct: 0.0210 comment_1: COORDINATES ARE FROM GUIDE STAR comment_2: CATALOG comment_3: RA_PM_VAL CHANGED TO FIT STSCI comment_4: SOFTWARE INACCURACY (NOV 91) fluxnum_1: 1 fluxval_1: V = 8.75 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 4.700 targname: AU-MIC config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 5S priority: 1 param_1: FAINT=240.0, param_2: SEARCH-SIZE=5, req_1: CYCLE 1; req_2: ONBOARD ACQ FOR 42; req_4: AT 8-SEP-92 +/- 4D; comment_1: GS CATALOG SHOW MAG. 10.15 STAR comment_2: 0.54 TIME SEC EAST AND 8.7 comment_3: ARCSEC SOUTH OF TARGET. comment_4: EXPECT ABOUT 1100 CTS/200 MS FOR comment_5: AU MIC IN MODE N2 ! linenum: 42.000 targname: AU-MIC config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 73.6S fluxnum_1: 1 priority: 2 req_1: ONBOARD ACQ FOR 43-46; req_2: GROUP 42-46 NO GAP; req_3: CYCLE 1/42-46; req_4: SEQ 42-43 comment_1: TARGET SHOULD NOT BE SCHEDULED UNLESS comment_2: ALREADY ACQUIRED BY GO/HRS PROGRAM comment_3: 4214. LINES 42-46 (COMPLETE OBS comment_4: OF AU MIC) SHOULD IMMEDIATELY FOLLOW comment_5: GO 4214 OBSERVATIONS. STEP-TIME=1.6SEC comment_6: CENTER IN LSA AFTER NEW DEFCAL ! linenum: 43.000 targname: AU-MIC config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 96.8S priority: 2 comment_1: TAKE MAP AFTER CENTERING comment_2: 200 MSEC INTEGRATIONS ! linenum: 44.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-B wavelength: 2800 num_exp: 1 time_per_exp: 55S priority: 2 req_1: CALIB FOR 45 NO SLEW; req_2: SEQ 44.000-45.000 NON-INT ! linenum: 45.000 targname: AU-MIC config: ^ opmode: ^ aperture: 2.0 sp_element: ^ wavelength: ^ num_exp: 6 time_per_exp: 164S priority: ^ param_1: STEP-PATT=7 ! linenum: 45.500 targname: ^ config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1400 num_exp: 22 time_per_exp: 164S priority: 2 param_1: STEP-PATT=5 ! linenum: 46.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: G160M wavelength: 1550 num_exp: 17 time_per_exp: 164S priority: ^ param_1: ^ ! ! end of exposure logsheet ! No scan data records found