! $Id: 5181,v 11.1 1994/12/07 20:55:55 pepsa Exp $ coverpage: title_1: DOPPLER IMAGING OF THE CHROMOSPHERES AND TRANSITION REGIONS title_2: OF COOL STARS: AB DORADUS, CYCLE 4 sci_cat: STELLAR ASTROPHYSICS sci_subcat: COOL STARS proposal_for: GTO/HRS cont_id: 1208 pi_fname: FREDERICK pi_mi: M. pi_lname: WALTER pi_inst: STATE UNIVERSITY OF NEW YORK AT STONY BROOK pi_country: USA pi_phone: (516)632-8232 keywords_1: STELLAR CHROMOSPHERES, STELLAR TRANSITION REGIONS, keywords_2: DOPPLER IMAGING, STELLAR ACTIVITY hours_pri: 14.98 num_pri: 1 pi_position: ASSISTANT PROFESSOR ! end of coverpage abstract: line_1: AB Dor (HD 36705) is one the most active single early K line_2: dwarfs known. It is very rapidly-rotating with a period of line_3: 0.514 days and vsini=100 km/s. It has been suggested that line_4: AB Dor is still contracting to the main sequence, on the line_5: basis of a strong Li I absorption line and Pleiades space line_6: motions. The phenomena exhibited by this star include line_7: flares, a large starspot, saturated emission line fluxes, line_8: bright nonthermal radio emission, and a co-rotating disk line_9: (or ring) located at two stellar radii that is identified line_10: from H-alpha emission. We propose to monitor AB Dor, which line_11: is in the continuous viewing zone, continuously for one line_12: rotation period to produce Doppler images of the lower line_13: chromosphere and the transition region in the light of line_14: Mg II, C IV, Si IV, O IV, C II, N V, Si III], and C III], line_15: with phase resolution of 0.05 at Mg II and 0.08 in the line_16: transition region. We will use these data to produce a 3-D line_17: model of the outer atmosphere of this star, using the line_18: density-sensitive line ratios and the measured emission line line_19: fluxes to infer the total nonradiative heating rate. We will line_20: obtain coordinated x-ray, radio, and optical observations. ! ! end of abstract general_form_proposers: lname: BRANDT fname: JOHN inst: COLORADO, UNIVERSITY OF country: USA ! lname: BROWN fname: ALEXANDER inst: COLORADO, UNIVERSITY OF country: USA ! lname: CARPENTER fname: KEN inst: GODDARD SPACE FLIGHT CENTER country: USA ! lname: DUNCAN fname: DOUGLAS inst: STSCI country: USA ! lname: LINSKY fname: JEFFREY mi: L. inst: COLORADO, UNIVERSITY OF country: USA ! lname: WALTER fname: FREDERICK mi: M inst: SUNY-STONY BROOK country: USA ! lname: VILHU fname: OSMI inst: HELSINKI, UNIVERSITY OF country: FINLAND ! ! end of general_form_proposers block general_form_text: ! question: 3 section: 1 line_1: AB Dor is in the continuous viewing zone. We will observe line_2: during an uninterrupted window of 13.8 hours. During that line_3: time we will cycle through observations with G160M, G200M, line_4: and ECH-B. Medium resolution observations of the transition line_5: region lines suffices to obtain about 12 resolution elements line_6: over the rotationally broadened line profile. line_7: All data will be obtained through the LSA. line_9: We will observe the star for about 1.1 rotational cycles. line_10: The overlap is necessary to begin to separate true line_11: rotational modulation from secular variability. This is line_12: the bare minimum needed to provide some confidence in the line_13: repeatability of the surface features: 2 full rotation would line_14: be preferable, but are unfeasible on both operational and line_15: time-requirement grounds. line_17: We will supplement the medium dispersion spectra with a pair line_18: of deep G140L exposures to get a complete view of the line_19: transition region diagnostics. These exposures (lines 40 and line_20: 41) can be dropped if side 1 is not operating. ! question: 4 section: 1 line_1: Stellar transition regions can only be observed in the line_2: ultraviolet. ! question: 5 section: 1 line_1: ! question: 6 section: 1 line_1: This is a time critical observation. We require 13.77 hours line_2: of uninterrupted time. The target is in the continuous line_3: viewing zone, and this time can be scheduled between SAA line_4: passages. We need uninterrupted coverage to study the line_5: changes in line profile over the 12.5 hour stellar rotation line_6: period. Earth occultations and reacquisitions would cut our line_7: observing efficiency down to about 30%, which is unacceptable line_8: for such a rapidly rotating star. line_9: The length of the observation is dictated by the 12.5 hour line_10: stellar rotation period. during that time we will obtain line_11: about 0.05 phase resolution at Mg II, and somewhat lower line_12: in the transition region lines. ! ! question: 8 section: 1 line_1: We need advance notice of the scheduling in order to arrange line_2: for ground-based supporting photometry and spectroscopy. We line_3: will request radio observations, and expect to line_4: request contemporaneous ROSAT observations. ! question: 9 section: 1 line_1: GTO programs 1208,1210. Data are being analyzed. The line_2: preliminary analysis of the 1210 observations was presented line_3: at the 7th Cambridge Cool Stars Workshop (October 1991); line_4: premininary interpretation of the spectra from program 1208 line_5: were presented in February 1992 at the 10th International line_6: Colloquium on X-Ray and Ultraviolet Observations of line_7: Laboratory and Astrophysical Plasmas. ! question: 10 section: 1 line_1: SUNY will supply an office and electricity. I have computing line_2: capabilities here, and at GSFC. ! question: 13 section: 1 line_1: We propose to study the dynamics of stellar transition line_2: regions by measuring the redshifts, indicative of downflows, line_3: in lines of C III, Si III, CIV, Si IV, and O IV. The energy line_4: balance and heating rates in stellar chromospheres and line_5: transition regions will be derived from an emission measure line_6: analysis of emission line fluxes and densities inferred line_7: from density sensitive line ratios. ! !end of general form text general_form_address: lname: WALTER fname: FREDERICK mi: M. category: PI inst: STATE UNIVERSITY OF NEW YORK addr_1: DEPARTMENT OF EARTH AND SPACE SCIENCES city: STONY BROOK state: NY zip: 11794 country: USA phone: 516-632-8232 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD36705 name_2: AB-DORADUS descr_1: A,139,156,174 pos_1: RA = 5H 28M 44.80S +/- 0.03S, pos_2: DEC = -65D 26' 56.8" +/- 0.4", pos_3: PLATE-ID=02I7 equinox: J2000 pm_or_par: Y pos_epoch_bj: J pos_epoch_yr: 2000.00 ra_pm_val: 0.008400 ra_pm_unct: 0.009000 dec_pm_val: 0.1330 dec_pm_unct: 0.0090 an_prlx_val: 0.0333 rv_or_z: V=0 comment_1: THIS STAR IS GUIDE STAR 8887 1611, comment_2: WITH PLATE_ID=+056, comment_3: RA=05H28M44.83S+/-.07S, comment_4: DEC=-65D26'55.59"+/-0.6", comment_5: ALSO MEASURED ON PLATE_ID=06B0, comment_6: ALSO GUIDE STAR 8887 1285, comment_7: WITH PLATE_ID=02I7, comment_8: RA=05H28M45.75S+/-.10S, comment_9: DEC=-65D26'58.23"+/-3.6" fluxnum_1: 1 fluxval_1: V=6.9 +/- 0.4 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: ABDOR-DI targname: # config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 163.2S fluxnum_1: 1 priority: # req_1: SEQ 1-6.1 NO GAP; req_2: ONBOARD ACQ FOR 2-6.1; comment_1: STEP-TIME=1.6SEC comment_2: CENTER IN LSA AFTER NEW DEFCAL ! linenum: 2.000 sequence_1: DEFINE sequence_2: ABDOR-DI targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 30S priority: # param_1: STEP-PATT=2 req_1: CALIB FOR 2.1 NO SLEW ! linenum: 2.100 sequence_1: DEFINE sequence_2: ABDOR-DI targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 272S priority: # param_1: STEP-PATT=7 ! linenum: 3.100 sequence_1: DEFINE sequence_2: ABDOR-DI targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1400 num_exp: 4 time_per_exp: 326.4S priority: # param_1: STEP-PATT=5 ! linenum: 4.100 sequence_1: DEFINE sequence_2: ABDOR-DI targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 272S priority: # param_1: STEP-PATT=7 ! linenum: 5.100 sequence_1: DEFINE sequence_2: ABDOR-DI targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1550 num_exp: 4 time_per_exp: 326.4S priority: # param_1: STEP-PATT=5 ! linenum: 6.100 sequence_1: DEFINE sequence_2: ABDOR-DI targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 272S priority: # param_1: STEP-PATT=7 ! linenum: 20.000 targname: HD36705 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 1.8S priority: 1 param_1: SEARCH-SIZE=3 param_3: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 31; req_2: CYCLE 4/ 20-38.1; comment_1: STEP TIME = 0.2 SEC ! linenum: 31.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 req_2: SEQ 31-38.1 NO GAP comment_1: THIS SEQUENCE REQUIRES 13.77 HOURS comment_2: OF CONTINUOUS SPACECRAFT TIME. comment_3: THIS OBSERVATION MUST BE SCHEDULED comment_4: WHILE THE TARGET IS IN THE CVZ, comment_5: AND CANNOT BE INTERRUPTED BY SAA comment_6: PASSAGES. (CONTINUED LINE 31.100) ! linenum: 31.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1240 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 comment_1: (CONTINUED FROM 31.000) comment_2: TARGHET ACQUISITION (LINE 20) CAN comment_3: BE SCHEDULED DURING SAA ORBITS. comment_4: *PLEASE CONTACT THE PI IF 13.8 HOURS comment_5: *OF CONTINUOUS VIEWING TIME CAN NOT comment_6: *BE SCHEDULED. ! linenum: 32.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 comment_1: IT MAY BE NECESSARY TO UPDATE THE comment_2: MEMORY DURING THIS OBSERVATION. comment_3: I HAVE MADE NO PROVISION FOR comment_4: BREAKING THE OBSERVATION TO comment_5: INCLUDE A SECOND TARGET ACQUISITION. ! linenum: 32.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1335 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 33.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 33.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G200M wavelength: 1900 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 34.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 34.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1240 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 35.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 35.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1335 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 36.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 36.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G200M wavelength: 1900 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 37.100 targname: ^ config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 163.2S fluxnum_1: 1 priority: ^ req_1: ONBOARD ACQ FOR 37.2; comment_1: STEP-TIME=1.6SEC comment_2: CENTER IN LSA AFTER NEW DEFCAL ! linenum: 37.200 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 30S priority: 1 param_1: STEP-PATT=2 req_1: CALIB FOR 37.3 NO SLEW; req_2: SEQ 37.2-37.3 NO GAP; ! linenum: 37.300 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 272S priority: ^ param_1: STEP-PATT=7 ! linenum: 37.400 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1400 num_exp: 4 time_per_exp: 326.4S priority: ^ param_1: STEP-PATT=5 ! linenum: 38.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 272S priority: 2 param_1: STEP-PATT=7 ! linenum: 40.000 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G140L wavelength: 1300 num_exp: 3 time_per_exp: 299.2S priority: 3 param_1: STEP-PATT=5 req_1: CYCLE 4/ 40-41 comment_1: LINES 40 AND 41 ARE NOT CRUCIAL TO comment_2: THE SUCCESS OF THIS PROPOSAL, AND CAN comment_3: BE DROPPED IF SIDE 1 IS INOPERATIVE. ! linenum: 41.000 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G140L wavelength: 1570 num_exp: 3 time_per_exp: 299.2S priority: ^ param_1: STEP-PATT=5 ! linenum: 70.000 targname: HD36705 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 1.8S priority: 1 param_1: SEARCH-SIZE=3 param_3: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 81; req_2: CYCLE 4/ 70-88.1; comment_1: STEP TIME = 0.2 SEC ! linenum: 81.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 req_2: SEQ 81-88.1 NO GAP comment_1: THIS SEQUENCE REQUIRES 13.77 HOURS comment_2: OF CONTINUOUS SPACECRAFT TIME. comment_3: THIS OBSERVATION MUST BE SCHEDULED comment_4: WHILE THE TARGET IS IN THE CVZ, comment_5: AND CANNOT BE INTERRUPTED BY SAA comment_6: PASSAGES. (CONTINUED LINE 81.100) ! linenum: 81.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1240 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 comment_1: (CONTINUED FROM 81.000) comment_2: TARGHET ACQUISITION (LINE 20) CAN comment_3: BE SCHEDULED DURING SAA ORBITS. comment_4: *PLEASE CONTACT THE PI IF 13.8 HOURS comment_5: *OF CONTINUOUS VIEWING TIME CAN NOT comment_6: *BE SCHEDULED. ! linenum: 82.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 comment_1: IT MAY BE NECESSARY TO UPDATE THE comment_2: MEMORY DURING THIS OBSERVATION. comment_3: I HAVE MADE NO PROVISION FOR comment_4: BREAKING THE OBSERVATION TO comment_5: INCLUDE A SECOND TARGET ACQUISITION. ! linenum: 82.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1335 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 83.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 83.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G200M wavelength: 1900 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 84.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 84.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1240 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 85.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 85.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1335 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 86.000 sequence_1: USE sequence_2: ABDOR-DI targname: HD36705 priority: 1 ! linenum: 86.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G200M wavelength: 1900 num_exp: 4 time_per_exp: 326.4S priority: 1 param_1: STEP-PATT=5 ! linenum: 87.100 targname: ^ config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 163.2S fluxnum_1: 1 priority: ^ req_1: ONBOARD ACQ FOR 87.2; comment_1: STEP-TIME=1.6SEC comment_2: CENTER IN LSA AFTER NEW DEFCAL ! linenum: 87.200 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 30S priority: 1 param_1: STEP-PATT=2 req_1: CALIB FOR 87.3 NO SLEW; req_2: SEQ 87.2-87.3 NO GAP; ! linenum: 87.300 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 272S priority: ^ param_1: STEP-PATT=7 ! linenum: 87.400 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1400 num_exp: 4 time_per_exp: 326.4S priority: ^ param_1: STEP-PATT=5 ! linenum: 88.100 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B wavelength: 2798 num_exp: 1 time_per_exp: 272S priority: 2 param_1: STEP-PATT=7 ! linenum: 90.000 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G140L wavelength: 1300 num_exp: 3 time_per_exp: 299.2S priority: 3 param_1: STEP-PATT=5 req_1: CYCLE 4/ 90-91 comment_1: LINES 40 AND 41 ARE NOT CRUCIAL TO comment_2: THE SUCCESS OF THIS PROPOSAL, AND CAN comment_3: BE DROPPED IF SIDE 1 IS INOPERATIVE. ! linenum: 91.000 targname: HD36705 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G140L wavelength: 1570 num_exp: 3 time_per_exp: 299.2S priority: ^ param_1: STEP-PATT=5 ! ! end of exposure logsheet ! No scan data records found