! $Id: 5106,v 4.1 1994/07/27 15:10:53 pepsa Exp $ coverpage: title_1: PLANETARY NEBULAR STRUCTURE (WC03): title_2: CYCLE 4 sci_cat: INTERSTELLAR MEDIUM proposal_for: GTO/WFC pi_title: PROF. pi_fname: JAMES pi_mi: A. pi_lname: WESTPHAL pi_inst: CALTECH pi_country: USA pi_phone: 818-395-4900 keywords_1: PLANETARY NEBULAE, MASS LOSS, EVOLUTION, NEBULA hours_pri: 5.62 num_pri: 3 wf_pc: Y pi_position: PROFESSOR OF PLANETA ! end of coverpage abstract: line_1: Observations of planetary nebulae utilizing the WF/PC are based upon the high line_2: angular resolution achievable. Seeing limited images of NGC 7293 the Helix line_3: Nebula resolve structures down to the order of E+15 cm. At 0.1 arcsec line_4: resolution, structures as small as E+14 to E+15 cm should be resolvable in a line_5: number of planetary nebulae. At these dimensions velocities of a few km/sec line_6: correspond to transit times of less than 100 years yet some of these line_7: condensations occur as filaments some 10 to 100 times the narrow width. What line_8: accounts for these "long lived" condensations? Can they be explained as line_9: ionization structures, shock fronts or successive shell ejections? Is there a line_10: pattern of mass loss as polar plumes or equatorial disks or magnetic line_11: containment? The possibility of addressing these aspects of stellar mass loss line_12: are tremendously enhanced by the resolution possible with WF/PC. The other line_13: objective of this program is to repeat the measurements on a few years line_14: baseline in order to study the temporal variations of well defined line_15: condensation. This may provide distance determinations as well as dynamical line_16: information. The targets/filters are: NGC7293, NGC246 and NGC1360 with F656N line_17: and F658N which will isolate H-Alpha and [NII] respectively. NGC7293, line_18: NGC6853 and NGC 7027 are reobserved with F656N. ! ! end of abstract general_form_proposers: lname: WESTPHAL fname: JAMES mi: A. inst: CALTECH country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: The surface brightness is relatively low requiring long exposures. With the line_2: filters chosen to discriminate between shadowed and unshadowed regions exposure line_3: times of the order of an hour may be required. Since the identification and line_4: reality of small features is vital a short exposure to assist in identifying line_5: cosmic ray hits is taken. The cycle 0 or 1 observations also provide first line_6: epoch images for a study of motions in the nebulae. The first return to this line_7: imaging is planned for cycles 2, 3, or 4. Based on these results future line_8: observations may be considered. ! question: 5 section: 1 line_1: Second epoch of NGC7293 observations taken one year after line_2: first. If object must be split off to next cycle, the same line_3: positioning and orientation of the object is required and line_4: must be carried over. If so, a REQ UPDATE is needed for line_5: insertion of the correct ORIENT from the first observation. ! question: 8 section: 1 line_1: No supporting or coordinated observations required. ! question: 13 section: 1 line_1: Observations of nearby planetary nebulae will show structure if present on a line_2: scale of 10dex14 cm. Images will be obtained in H-alpha, HeII and NII in order line_3: to test current models of the nature of the condensations. It is also planned line_4: to repeat observations in order to measure proper motions of well defined line_5: condensations. ! !end of general form text general_form_address: lname: WESTPHAL fname: JAMES mi: A. title: PROF. category: PI inst: CALTECH addr_1: M/S 170-25 addr_2: DIVISION OF GEOLOGICAL & addr_3: PLANETARY SCIENCES city: PASADENA state: CA zip: 91125 country: USA phone: 818-395-4900 ! lname: CODE fname: ARTHUR mi: C. category: CON inst: UNIV. WISCONSIN addr_1: WASHBURN OBSERVATORY addr_2: 475 N. CHARTER ST. city: MADISON state: WI zip: 53706 country: USA phone: 608-262-9594 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC7293 name_2: HELIX-NEB. descr_1: G, 502 pos_1: RA= 22H29M36.1S +/- .1S, pos_2: DEC= -20D47'11" +/- 1" equinox: 2000 comment_1: PLANETARY NEBULA ! targnum: 2 name_1: NGC6853 descr_1: G, 502 pos_1: RA= 19H59M32.5S +/- .1S, pos_2: DEC= +22D43'11" +/- 1" equinox: 2000 comment_1: PLANETARY NEBULA ! targnum: 3 name_1: NGC246 descr_1: G, 502 pos_1: RA= 00H47M00.9S +/- 0.1S, pos_2: DEC= -11D52'37" +/- 1" equinox: 2000 comment_1: PLANETARY NEBULA ! targnum: 4 name_1: NGC1360 descr_1: G, 502 pos_1: RA= 03H33M13.7S +/- 0.1S, pos_2: DEC= -25D51'34" +/- 1" equinox: 2000 comment_1: PLANETARY NEBULA ! targnum: 5 name_1: NGC7027 descr_1: G, 502 pos_1: RA= 21H07M01.7S +/- 0.1S, pos_2: DEC= 42D14'10" +/- 1" equinox: 2000 comment_1: PLANETARY NEBULA ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: NGC7293 config: WFPC2 opmode: IMAGE aperture: WFALL sp_element: F656N num_exp: 1 time_per_exp: 2000S priority: 1 param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0 req_1: NON-INT / 1.0-14.0; req_2: GROUP 1.0-1.2 NO GAP; req_3: CYCLE 4 / 1.0-14.0 comment_1: CYCLE 4-5 VERSION: 6/4/93 ! linenum: 1.200 targname: NGC7293 config: WFPC2 opmode: IMAGE aperture: WFALL sp_element: F658N num_exp: 1 time_per_exp: 2000S priority: 1 param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0 req_1: SAME POS FOR 1.2 AS 1.0 comment_1: ORIGINALLY HAD NO CR-SPLIT ! linenum: 2.000 targname: NGC246 config: WFPC2 opmode: IMAGE aperture: WFALL sp_element: F656N num_exp: 1 time_per_exp: 2000S priority: 1 param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0 req_1: GROUP 2-2.2 NO GAP; ! linenum: 2.200 targname: NGC246 config: WFPC2 opmode: IMAGE aperture: WFALL sp_element: F658N num_exp: 1 time_per_exp: 2000S priority: 1 param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0 req_1: SAME POS FOR 2.2 AS 2.0; comment_1: ORIGINALLY HAD NO CR-SPLIT ! linenum: 3.000 targname: NGC1360 config: WFPC2 opmode: IMAGE aperture: WFALL sp_element: F656N num_exp: 1 time_per_exp: 2000S priority: 1 param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0 req_1: GROUP 3-3.2 NO GAP; comment_1: CYCLE 4-5 VERSION: 6/4/93 ! linenum: 3.200 targname: NGC1360 config: WFPC2 opmode: IMAGE aperture: WFALL sp_element: F658N num_exp: 1 time_per_exp: 2000S priority: 1 param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0 req_1: SAME POS FOR 3.2 AS 3.0 comment_1: ORIGINALLY HAD NO CR-SPLIT ! linenum: 14.000 targname: NGC7293 config: WFPC2 opmode: IMAGE aperture: WFALL sp_element: F656N num_exp: 1 time_per_exp: 2000S priority: 1 param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0 req_1: AFTER 1.0 BY 365D; req_2: SAME POS FOR 14 AS 1.0; ! ! end of exposure logsheet ! No scan data records found