! File: 4992C.PROP ! Database: PEPDB ! Date: 23-FEB-1994:14:03:43 coverpage: title_1: CORONAL LINE SURVEY IN LATE-TYPE STARS: CYCLE 4 HIGH title_2: PRIORITY - EXPO sci_cat: STELLAR ASTROPHYSICS sci_subcat: COOL STARS proposal_for: GTO/HRS cont_id: 1159 pi_title: DR. pi_fname: STEPHEN pi_mi: P. pi_lname: MARAN pi_inst: NASA, GODDARD SPACE FLIGHT CENTER pi_country: USA pi_phone: (301) 286-8607 keywords_1: CORONAE, LATE-TYPE STARS, X-RAY STARS, CORONAL keywords_2: ACTIVITY hours_pri: 5.78 num_pri: 1 hrs: X pi_position: SENIOR STAFF SCIENTI ! end of coverpage abstract: line_1: This is the first survey of coronal lines in the ultraviolet spectra of line_2: late-type stars. The the target was chosen on the basis of large apparent line_3: X-ray fluxes and large ratio of hot-to-cool component in X-ray fluxes. The line_4: objectives are to detect and measure coronal lines, together with transition line_5: region and chromospheric lines that can be observed at the same HRS grating line_6: setting, to investigate the temperature, density distribution in the outer line_7: atmospheres of late-type stars, and to look for possible activity in the line_8: coronal lines, since even targets that are not recognized flare stars on the line_9: basis of present data on chromospheric and photospheric activity may produce line_10: detectable flares when observed in coronal lines. For maximum signal-to-noise line_11: in the coronal lines, assuming the corona is quiet, all of the observing time line_12: allocated per star is used at a single grating setting. However, brief line_13: exposures are made in repeat observation mode so that if the lines are bright, line_14: presumably due to flaring, variability information will be preserved. The line_15: results will be analyzed together with available X-ray data and other relevant line_16: observations from other facilities. ! ! end of abstract general_form_proposers: lname: BRANDT fname: JOHN mi: C. inst: COLORADO, UNIVERSITY OF country: USA ! lname: LINSKY fname: JEFFREY mi: L. inst: COLORADO, UNIVERSITY OF country: USA ! lname: SHINE fname: RICHARD inst: LOCKHEED PALO ALTO RES. LAB. country: USA ! lname: WALTER fname: FREDERICK mi: M. inst: COLORADO, UNIVERSITY OF country: USA ! lname: MARAN fname: STEPHEN mi: P. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! lname: WOODGATE fname: BRUCE mi: E. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! lname: CARPENTER fname: KENNETH mi: G. inst: NASA, GODDARD country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: line_4: The time is mostly devoted to a long series of equal, brief integrations line_5: at a single grating setting, in RAPID observation mode. The integrations line_6: series is bracketed by spectral calibration lamp observations, taken with line_7: the shutter closed on the large slit. line_8: We intend to coadd the many brief exposures off-line to attain adequate line_9: signal-to-noise in the coronal lines. The exposures are so brief because in line_10: flares or other activity, the lines can brighten by orders of magnitude in line_11: seconds and we wish to observe such phenomena, should they occur. Further, the line_12: bright lines of O I and C I, which are observed at the same grating setting, line_13: provide good signal-to-noise in short times and will constitute a significant, line_14: if less sensitive, index of stellar activity. ! question: 4 section: 1 line_1: Stellar coronae, other than that of the sun, can only be usefully studied in UV line_2: and X-rays. This program is to explore what can be learned from diagnostic line_3: lines in the UV. Among "existing" facilities, only the HST, as equipped with line_4: the HRS, can provide the spectral resolution and sensitivity necessary to line_5: detect these lines. ! question: 5 section: 1 line_1: As we plan supporting radio observations, please schedule line_2: the HRS observations when the targets are near the meridian line_3: at the Very Large Array (Socorro, N.M.). ! question: 7 section: 1 line_1: The data will be analyzed with SDAS at the ST Science Institute and with line_2: institutional computing facilities at the respective institutions of the line_3: investigators (GSFC, JILA, LASP, and Lockheed Palo Alto Research line_4: Laboratories). line_6: Shine is the lead Co-I for coadding the data and developing the set of measured line_7: line fluxes which will be input by various Co-Is to coronal modelling programs. line_8: Coronal models will be examined as a function of stellar type and information line_9: on the respective chromospheres and transition regions, rotation velocities line_10: where available, and other fundamental stellar parameters. ! question: 8 section: 1 line_1: If it appears that X-ray observations can be acquired of any of our targets in line_2: the general time frame of the HRS observations, we will solicit such line_3: observations, to determine the state of the stellar X-ray corona, which may line_4: vary. ! question: 10 section: 1 line_1: This research will be supported through the post-launch science budget of the line_2: HRS Science Team. GSFC will provide the services of the GSFC-employed line_3: investigators as well as support through miscellaneous institutional facilities line_4: and services. ! question: 12 section: 1 line_1: line_7: Kenneth Carpenter (301 286-3453) is an alternate contact if questions arise line_8: and the PI cannot be contacted. ! question: 13 section: 1 line_1: A survey for coronal lines in the ultraviolet spectra of late-type stars. line_2: Also, a limited search for evidence of flaring in the coronae of late-type line_3: stars, whether or not they are classified as flare stars from their line_4: photospheric and chromospheric spectra. ! !end of general form text general_form_address: lname: WALTER fname: FREDERICK mi: M. inst: UNIV OF COLORADO/CASA addr_1: CAMPUS BOX 391 city: BOULDER state: CO zip: 80309 country: USA phone: (303) 492-4062 ! lname: WOODGATE fname: BRUCE mi: E. inst: NASA, GODDARD SPACE FLIGHT CENTER addr_1: CODE 681 city: GREENBELT state: MD zip: 20771 country: USA phone: (301) 286-5401 ! lname: CARPENTER fname: KENNETH mi: G. inst: NASA, GODDARD SPACE FLIGHT CENTER addr_1: CODE 681 city: GREENBELT state: MD zip: 20771 country: USA phone: (301) 286-3453 ! lname: MARAN fname: STEPHEN mi: P. title: DR. category: PI inst: NASA, GODDARD SPACE FLIGHT CENTER addr_1: CODE 680 city: GREENBELT state: MD zip: 20771 country: USA phone: (301) 286-8607 ! lname: SHINE fname: RICHARD inst: LOCKHEED, PALO ALTO RESEARCH LAB. addr_1: 3251 HANOVER ST. city: PALO ALTO state: CA zip: 94304 country: USA phone: (415) 424-2858 ! ! end of general_form_address records fixed_targets: targnum: 2 name_1: HD22468 name_2: HR1099 descr_1: A,167 pos_1: RA = 03H 34M 13.133S+/-0.2", pos_2: DEC = +00D 25' 31.03"+/-0.2" equinox: 1950 pm_or_par: Y pos_epoch_bj: B pos_epoch_yr: 1963.01 ra_pm_val: 0.000200 ra_pm_unct: 0.000667 dec_pm_val: -0.1480 dec_pm_unct: 0.0100 an_prlx_val: 0.0320 an_prlx_unct: 0.0010 rv_or_z: V=-23. comment_1: K1IV + G5IV BINARY fluxnum_1: 1 fluxval_1: V=5.71 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: CORACQ targname: # config: HRS opmode: ACQ aperture: 2.0 sp_element: # num_exp: 1 time_per_exp: 5S priority: # param_1: BRIGHT=RETURN, param_2: SEARCH-SIZE=5 req_1: SEQ 1-1.1 NO GAP ! linenum: 1.100 sequence_1: DEFINE sequence_2: CORACQ targname: # config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: # num_exp: 1 time_per_exp: 20.4S priority: # comment_1: CENTER IN LSA AFTER NEW DEFCAL comment_2: STEP-TIME=200 MSEC ! linenum: 5.100 sequence_1: DEFINE sequence_2: CORONSEQ targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G160M wavelength: 1360 num_exp: 1 time_per_exp: 10S priority: # param_1: DOPPLER=OFF, STEP-PATT=2 req_1: CALIB FOR 5.3 NO SLEW; req_2: SEQ 5.1-5.4 NO GAP ! linenum: 5.300 sequence_1: DEFINE sequence_2: CORONSEQ targname: # config: HRS opmode: RAPID aperture: 2.0 sp_element: G160M wavelength: 1360 num_exp: 1 time_per_exp: 1685.0S priority: # param_1: SAMPLE-TIME=0.4 ! linenum: 5.400 sequence_1: DEFINE sequence_2: CORONSEQ targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G160M wavelength: 1360 num_exp: 1 time_per_exp: 10S priority: 1 param_1: DOPPLER=OFF, STEP-PATT=2 req_1: CALIB FOR 5.3 NO SLEW ! linenum: 7.000 sequence_1: USE sequence_2: CORACQ targname: HD22468 sp_element: MIRROR-N2 priority: 1 req_1: ONBOARD ACQ FOR 7.4-8.1; req_2: CYCLE 4 / 7-8.1; req_3: GROUP 7.0-8.1 WITHIN 24H ! linenum: 7.400 sequence_1: USE sequence_2: CORONSEQ targname: ^ priority: 1 ! linenum: 7.500 sequence_1: USE sequence_2: CORONSEQ targname: ^ priority: 1 ! linenum: 7.600 sequence_1: USE sequence_2: CORONSEQ targname: ^ priority: 1 ! linenum: 7.700 sequence_1: USE sequence_2: CORONSEQ targname: HD22468 priority: 1 ! linenum: 7.800 sequence_1: USE sequence_2: CORONSEQ targname: ^ priority: 1 ! linenum: 7.900 sequence_1: USE sequence_2: CORONSEQ targname: ^ priority: 1 ! linenum: 8.000 sequence_1: USE sequence_2: CORONSEQ targname: ^ priority: 1 ! linenum: 8.100 sequence_1: USE sequence_2: CORONSEQ targname: ^ priority: 1 ! ! end of exposure logsheet ! No scan data records found