! File: 1103C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:01:51:19 coverpage: title_1: VISIBLE AND ULTRAVIOLET LIGHT CURVES OF SHORT PERIOD RR LYRAE-TYPE title_2: (RRS) VARIABLE STARS sci_cat: STELLAR ASTROPHYSICS proposal_for: GTO/HSP pi_fname: ROBERT pi_mi: C. pi_lname: BLESS pi_inst: WISCONSIN, UNIVERSITY OF pi_country: USA pi_phone: (608)262-1715 keywords_1: PULSATING STARS, STELLAR ATMOSPHERES, HYDRODYNAMICS hours_pri: 6.26 num_pri: 4 ! end of coverpage abstract: line_1: Almost all studies of short-period RR Lyrae stars line_2: have mentioned the possibility of small-scale line_3: fluctuations in light curves or short time-scale line_4: changes in absorption line strengths. While careful line_5: examination of high signal-to-noise ratio visible line_6: light curves has failed to confirm such behavior, line_7: fluctuations may still be detectable in the line_8: ultraviolet region. These would reflect such line_9: phenomena as shock waves generated by the pulsation line_10: in the outer stellar envelope. We propose high time line_11: resolution, high signal-to noise ratio observations line_12: of a sample of such stars to characterize the line_13: ultraviolet pulsation and investigate the pulsation line_14: effects in the upper atmosphere. Revision History: line_15: Defer to Cycle 2--BJW 12/24/91; Added comment lines line_16: concerning deferment of test until PRISM mode line_17: calibration--BJW 3/18/92; ! ! end of abstract general_form_proposers: lname: BLESS fname: ROBERT mi: C. inst: WISCONSIN, UNIVERSITY OF country: USA ! lname: VAN CITTERS fname: G. mi: W. inst: NATIONAL SCIENCE FOUNDATION country: USA ! lname: DOLAN fname: JOSEPH mi: F. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! lname: ELLIOT fname: JAMES mi: L. inst: MASSACHUSETTS INSTITUTE OF TECHNOLOGY country: USA ! lname: ROBINSON fname: EDWARD mi: L. inst: TEXAS, UNIVERSITY OF country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: High time resolution, high signal to noise ratio line_2: light curves of short period RR Lyrae stars will be line_3: obtained in both visible and ultraviolet line_4: wavelengths. The HSP/PRISM mode will be used at 5 line_5: second time resolution. ! question: 4 section: 1 line_1: See Section 2 ! question: 13 section: 1 line_1: Almost all studies of short-period RR Lyrae stars line_2: have mentioned the possibility of small-scale line_3: fluctuations in light curves or short time-scale line_4: changes in absorption line strengths. These would line_5: reflect such phenomena as shock waves generated by line_6: the pulsation in the outer stellar envelope. We line_7: propose high time resolution, high signal-to-noise line_8: ratio observations of a sample of such stars to line_9: characterize the ultraviolet pulsation and line_10: investigate the pulsation effects in the upper line_11: atmosphere. ! !end of general form text general_form_address: lname: BLESS fname: ROBERT mi: C. category: PI inst: UNIVERSITY OF WISCONSIN addr_1: WASHBURN OBSERVATORY addr_2: 475 N. CHARTER STREET city: MADISON state: WI zip: 53706 country: USA phone: (608)262-1715 telex: 265452-UOFWISC-MDS ! lname: VAN CITTERS fname: G. mi: W. category: CON inst: NATIONAL SCIENCE FOUNDATION addr_1: DIV. OF ASTRONOMICAL SCI. addr_2: 1800 G STREET, N.W. city: WASHINGTON state: DC zip: 20550 country: USA phone: (202)357-9793 telex: 982-438 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: AI-VEL name_2: SAO 219640 descr_1: RRS pos_1: RA = 08H 14M 05.230S +/- 0.5", pos_2: DEC = -44D 34' 29.931" +/- 0.5" equinox: 2000 comment_1: POSREF = SAO CATALOG, WITH PM fluxnum_1: 1 fluxval_1: V=6.4 ! targnum: 2 name_1: SX-PHE name_2: SAO 231773 descr_1: ^ pos_1: RA = 23H 46M 32.728S +/- 0.5", pos_2: DEC = -41D 34' 47.064" +/- 0.5" equinox: 2000 comment_1: POSREF = SAO CATALOG, WITH PM fluxnum_1: 1 fluxval_1: V=6.7 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 0.500 targname: AI-VEL config: HSP/VIS opmode: ACQ num_exp: 1 time_per_exp: 4S priority: 1 param_1: DATA-FORMAT=ANALOG, req_1: CYCLE 2 / .5-1.0; req_2: ONBOARD ACQ FOR 1; ! linenum: 1.000 targname: AI-VEL config: HSP/VIS opmode: PRISM aperture: 1.0 sp_element: F551W/F240W num_exp: 1 time_per_exp: 3H fluxnum_1: 1 priority: ^ param_1: SAMPLE-TIME=5, comment_1: PROPOSAL MAY HAVE TO BE comment_2: MODIFIED DEPENDING UPON STATE comment_3: OF PRISM MODE CALIBRATION. ! linenum: 1.500 targname: SX-PHE config: HSP/VIS opmode: ACQ num_exp: 1 time_per_exp: 4S fluxnum_1: 1 priority: ^ param_1: DATA-FORMAT=ANALOG, req_1: CYCLE 2 / 1.5-2.0; req_2: ONBOARD ACQ FOR 2; ! linenum: 2.000 targname: SX-PHE config: HSP/VIS opmode: PRISM aperture: 1.0 sp_element: F551W/F240W num_exp: ^ time_per_exp: 2H fluxnum_1: 1 priority: ^ param_1: SAMPLE-TIME=5, comment_1: INTERRUPTIONS BY EARTH OCCULTATIONS comment_2: SHOULD BE MINIMIZED FOR ALL comment_3: EXPOSURES. comment_4: PROPOSAL MAY HAVE TO BE comment_5: MODIFIED DEPENDING UPON STATE comment_6: OF PRISM MODE CALIBRATION. ! ! end of exposure logsheet ! No scan data records found