! File: 1100C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:01:41:25 coverpage: title_1: EVOLUTION OF THE NUCLEI OF PLANETARY NEBULAE sci_cat: STELLAR ASTROPHYSICS sci_subcat: SUBLUMINOUS STARS proposal_for: GTO/HSP longterm: 3 pi_fname: ROBERT pi_mi: C. pi_lname: BLESS pi_inst: WISCONSIN, UNIVERSITY OF pi_country: USA pi_phone: (608)262-1715 keywords_1: PLANETARY NEBULAE, STELLAR EVOLUTION, WHITE DWARFS. hours_pri: 30.00 num_pri: 2 realtime: X ! end of coverpage abstract: line_1: The nuclei of planetary nebulae represent a central link in the late stages of line_2: stellar evolution, the connection between the asymptotic giant branch and the line_3: white dwarfs. In this picture, the core gradually increases in temperature and line_4: contracts after expelling the planetary nebula, eventually reaching the white line_5: dwarf cooling sequence. The agreement between models of this process and line_6: observations rests on assumptions about nebular distance scales, bolometric line_7: corrections and reddening. We propose to use the high-speed photometer to line_8: measure the luminosity variation of a central star directly. The evolutionary line_9: time scale and temperature changes will be observed utilizing the stability and line_10: precision of the photometer in combination with the angular resolution of Space line_11: Telescope. line_12: Revision History: Received on RPS 9/1/89; Added to SCCS 9/5/89 line_13: RPSS V7.2 remote & local; removed extraneous comments; fixed small syntax line_14: errors; Added coordinate uncertainty to target 5 & 6 - SALM 9/13/89 line_15: Added comments about acq. on repeat visits - SALM 9/28/89; Move NGC40 to line_16: cycle2, delete 1 UV filter, reduce repeat obs, do obs on VIS - SALM 3/5/90 line_17: Move NGC1360 to cycle 2 - SALM 3/19/90. ! ! end of abstract general_form_proposers: lname: VAN CITTERS fname: G. mi: W. inst: NATIONAL SCIENCE FOUNDATION country: USA ! lname: BLESS fname: ROBERT mi: C. inst: WISCONSIN, UNIVERSITY OF 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: The program central star (P) and 2 comparison stars (C1, C2) will each be line_2: observed in 3 filters during one orbit. The sequence is P, C1, P, C2. This line_3: is to be repeated for 3 orbits on each of 2 central stars. Stars should be line_4: reobserved at 1-month intervals. This request covers only Cycles 1 & 2. line_5: Further time will be requested as GO time based on results of these line_6: observations. During Cycle 1, NGC 40 should be observed for 5 months (total of line_7: 5 hours); NGC 1360 is also Cycle 1. line_9: The attached target list contains more stars than will be observed to allow for line_10: uncertainty of launch date and uncertainty about presence of suitable line_11: comparison stars. ! question: 4 section: 1 line_1: The differential technique has been used from the ground to obtain results at line_2: the 0.001 mag. level on stars near the main sequence. To detect the changes line_3: expected in these hot stars, access to the ultraviolet (where the nuclei will line_4: be brighter and brightness change more pronounced) and the photometric line_5: stability and repeatable image size and angular resolution is required. ! question: 5 section: 1 line_1: Real time acquisition is requested for the first observation of each star to line_2: center it in aperture and be certain no contaminating sources are present in line_3: the UV. This is critical given the limits to which photometry is to be line_4: attempted. ! question: 13 section: 1 line_1: The nuclei of planetary nebulae represent a central link in the late stages of line_2: stellar evolution: the connection between the asymptotic giant branch and the line_3: white dwarfs. We propose to use the high-speed photometer to measure the line_4: luminosity variation of a central star directly. The evolutionary time scale line_5: and temperature changes will be observed utilizing the stability and precision line_6: of the photometer in combination with the angular resolution of Space line_7: Telescope. ! !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 ST. city: MADISON state: WI zip: 53706 country: USA phone: (608)262-1715 telex: 26542-UOFWISC-MDS ! lname: VAN CITTERS fname: G. mi: W. category: CON inst: NATIONAL SCIENCE FOUNDATION addr_1: DIVISION OF ASTRONOMICAL addr_2: 1800 G STREET, N.W. city: WASHINGTON state: DC zip: 20550 country: USA phone: (202)357-9793 telex: 892-438 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC40 descr_1: CENTRAL STAR OF PLANETARY NEBULA pos_1: RA = 00H 13M 1.06S +/- 0.5", pos_2: DEC = +72D 31' 19.0" +/- 0.5" equinox: 2000 acqpr_1: BKG comment_1: POSITION PUT IN BY RLW,1/31/89 fluxnum_1: 1 fluxval_1: V = 11.6 ! targnum: 2 name_1: NGC40-C1 descr_1: COMPARISON STAR pos_1: RA = 00H 08M 40.14S +/- 0.5", pos_2: DEC = +72D 24' 53.7" +/- 0.5" equinox: 1950 comment_1: POSITION PUT IN BY RLW,1/18/89 fluxnum_1: 1 fluxval_1: V = 11.6 ! targnum: 3 name_1: NGC40-C2 descr_1: COMPARISON STAR pos_1: RA = 00H 07M 55.26S +/- 0.5", pos_2: DEC = +72D 04' 39.3" +/- 0.5" equinox: 1950 comment_1: POSITION PUT IN BY RLW,1/18/89 fluxnum_1: 1 fluxval_1: V = 11.5 ! targnum: 4 name_1: NGC1360 descr_1: CENTRAL STAR OF PLANETARY NEBULA pos_1: RA = 03H 33M 14.64S +/- 0.5", pos_2: DEC = -25D 52' 18.7" +/- 0.5" equinox: 2000 acqpr_1: BKG comment_1: POSITION PUT IN BY RLW,1/31/89 fluxnum_1: 1 fluxval_1: V = +11.3 ! targnum: 5 name_1: NGC1360-C1 descr_1: COMPARISON STAR pos_1: RA = 03H 31M 0.1S +/- 0.5", pos_2: DEC = -26D 14' 42.4" +/- 0.5" equinox: 1950 fluxnum_1: 1 fluxval_1: V = +9.7 ! targnum: 6 name_1: NGC1360-C2 descr_1: ^ pos_1: RA = 03H 31M 38.2S +/- 0.5", pos_2: DEC = -26D 07' 39.1" +/- 0.5" equinox: 1950 fluxnum_1: 1 fluxval_1: V = +9.6 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 0.500 sequence_1: DEFINE sequence_2: ACQ targname: # config: HSP/VIS opmode: ACQ num_exp: 1 time_per_exp: 4S fluxnum_1: 1 priority: 3 ! linenum: 1.000 sequence_1: DEFINE sequence_2: PLAN targname: # config: HSP/VIS opmode: SINGLE aperture: 1.0 sp_element: F184W num_exp: 1 time_per_exp: 2M fluxnum_1: 1 priority: 3 param_1: SAMPLE-TIME=5, ! linenum: 3.000 sequence_1: ^ targname: ^ config: HSP/VIS opmode: ^ aperture: ^ sp_element: F551W num_exp: ^ time_per_exp: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 3.900 sequence_1: USE ACQ targname: NGC40 req_1: INT ACQ FOR 4,6,8,10,12,14; req_2: CYCLE 2 / 3.9-15; req_3: REPEAT 3.9-15 EVERY 60D +/- 5D req_4: FOR 7 MORE TIMES; comment_1: TARGETS MUST BE RE-ACQUIRED ON comment_2: REPEAT VISITS, UNTIL SYSTEM HAS comment_3: CAPABILITY TO RE-USE GUIDE STARS, comment_4: BUT AN INT ACQ IS NECESSARY FOR comment_5: ONLY THE FIRST VISIT - AFTERWARDS comment_6: USE ONBOARD ACQS. ! linenum: 3.910 sequence_1: USE ACQ targname: NGC40-C1 req_1: ONBOARD ACQ FOR 5,9,13; ! linenum: 3.920 sequence_1: USE ACQ targname: NGC40-C2 req_1: ONBOARD ACQ FOR 7,11,15; ! linenum: 4.000 sequence_1: USE PLAN targname: NGC40 req_1: SEQ 4-7 NO GAP; ! linenum: 5.000 sequence_1: USE PLAN targname: NGC40-C1 ! linenum: 6.000 sequence_1: ^ targname: NGC40 ! linenum: 7.000 sequence_1: USE PLAN targname: NGC40-C2 ! linenum: 8.000 sequence_1: ^ targname: NGC40 req_1: SEQ 8-11 NO GAP; req_2: AFTER 7 BY 95M +/- 10M; ! linenum: 9.000 sequence_1: USE PLAN targname: NGC40-C1 ! linenum: 10.000 sequence_1: ^ targname: NGC40 ! linenum: 11.000 sequence_1: ^ targname: NGC40-C2 comment_1: NEBULAR BACKGROUND IN APERTURE MUST comment_2: BE ESTIMATED FROM INT ACQ DATA SINCE comment_3: SKY MEASUREMENT OUTSIDE OF NEBULAE comment_4: WOULD NOT BE VALID. ! linenum: 12.000 sequence_1: USE sequence_2: PLAN targname: NGC40 req_1: SEQ 12-15 NO GAP; req_2: AFTER 11 BY 95M +/- 10M; ! linenum: 13.000 sequence_1: USE sequence_2: PLAN targname: NGC40-C1 ! linenum: 14.000 sequence_1: USE sequence_2: PLAN targname: NGC40 ! linenum: 15.000 sequence_1: USE sequence_2: PLAN targname: NGC40-C2 ! linenum: 15.900 sequence_1: USE ACQ targname: NGC1360 req_1: INT ACQ FOR 16,18,20,22,24,26; req_2: CYCLE 2 / 15.9-27; req_3: REPEAT 15.9-27 EVERY 60D +/- 5D req_4: FOR 7 MORE TIMES; comment_1: TARGETS MUST BE RE-ACQUIRED ON comment_2: REPEAT VISITS UNTIL SYSTEM HAS comment_3: THE CAPABILITY TO RE-USE GUIDE STARS, comment_4: BUT AN INT ACQ IS NECESSARY FOR ONLY comment_5: THE FIRST VISIT - AFTERWARDS USE comment_6: ONBOARD ACQS. ! linenum: 15.910 sequence_1: USE ACQ targname: NGC1360-C1 req_1: ONBOARD ACQ FOR 17,21,25; ! linenum: 15.920 sequence_1: USE ACQ targname: NGC1360-C2 req_1: ONBOARD ACQ FOR 19,23,27; ! linenum: 16.000 sequence_1: USE sequence_2: PLAN targname: NGC1360 req_1: SEQ 16-19 NO GAP; ! linenum: 17.000 sequence_1: USE sequence_2: PLAN targname: NGC1360-C1 ! linenum: 18.000 sequence_1: USE sequence_2: PLAN targname: NGC1360 ! linenum: 19.000 sequence_1: USE sequence_2: PLAN targname: NGC1360-C2 ! linenum: 20.000 sequence_1: USE sequence_2: PLAN targname: NGC1360 req_1: SEQ 20-23 NO GAP; req_2: AFTER 19 BY 95M +/- 10M; ! linenum: 21.000 sequence_1: USE sequence_2: PLAN targname: NGC1360-C1 ! linenum: 22.000 sequence_1: USE sequence_2: PLAN targname: NGC1360 ! linenum: 23.000 sequence_1: USE sequence_2: PLAN targname: NGC1360-C2 ! linenum: 24.000 sequence_1: USE sequence_2: PLAN targname: NGC1360 req_1: SEQ 24-27 NO GAP; req_2: AFTER 23 BY 95M +/- 10M; ! linenum: 25.000 sequence_1: USE sequence_2: PLAN targname: NGC1360-C1 ! linenum: 26.000 sequence_1: USE sequence_2: PLAN targname: NGC1360 ! linenum: 27.000 sequence_1: USE sequence_2: PLAN targname: NGC1360-C2 ! ! end of exposure logsheet ! No scan data records found