! File: 3289C.PROP ! Database: PEPDB ! Date: 19-FEB-1994:01:37:57 coverpage: title_1: PLANETARY NEBULAR STRUCTURE (WF/PC-03): title_2: CYCLE 3 AND FUTURE-CYCLE CONTINUATION 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) 356-4900 keywords_1: PLANETARY NEBULAE, MASS LOSS, EVOLUTION, NEBULA hours_pri: 2.30 num_pri: 6 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. Structure at the level of E+14 cm is seen in only one line_3: planetary NGC7293, Helix nebula. It is in the size range from E+14 to E+15 cm line_4: that the origin of long lived condensation is expected. Are the features seen line_5: in the Helix common to most planetaries? Do these condensations result in line_6: shadowing that can explain the ionization structure? line_7: The other objective of this program is to repeat the measurements on a few line_8: years baseline in order to study the temporal variations of well defined line_9: condensation. This may provide distance determinations as well as dynamic line_10: information. ! ! 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: No real time or special scheduling required. ! 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 ! ! 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: NGC6164 descr_1: G, 502 pos_1: RA= 16H33M59.5S +/- 0.1S, pos_2: DEC= -48D09'06" +/- 1" equinox: 2000 comment_1: PLANETARY NEBULA ! targnum: 6 name_1: NGC7027 descr_1: G, 502 pos_1: RA= 21H07M00.2S +/- 0.1S, pos_2: DEC= 42D14'18" +/- 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 sequence_1: DEFINE sequence_2: PN targname: # config: WFC opmode: IMAGE aperture: WFALL sp_element: F656N num_exp: 1 time_per_exp: 2100S priority: # param_1: CR-SPLIT=0.5, param_2: PRE-FLASH=YES, param_3: CR-TOLERANCE=0.0 req_1: NON-INT / 1-6.5; req_2: GROUP 1-5 NO GAP; req_3: POS TARG 10,-10 / 1-5; req_4: SAME POS FOR 3-5 AS 1; req_5: SAME ORIENT FOR 3-5 AS 1; comment_1: CYCLE 3-9 VERSION: 3/24/92 ! linenum: 3.000 sequence_1: ^ targname: # config: WFC opmode: IMAGE aperture: WFALL sp_element: F469N num_exp: 1 time_per_exp: 2100S priority: # param_1: CR-SPLIT=NO, param_2: PRE-FLASH=YES ! linenum: 5.000 sequence_1: ^ targname: # config: WFC opmode: IMAGE aperture: WFALL sp_element: F658N num_exp: 1 time_per_exp: 2100S priority: # param_1: CR-SPLIT=NO, param_2: PRE-FLASH=YES comment_1: THIS SEQUENCE IS INTENDED TO FIT comment_2: INTO THREE ORBITS, ONE PER LINE. comment_3: ADJUST EXPOSURE TIMES +/- 20 PERCENT comment_4: TO FIT. ! linenum: 6.500 sequence_1: DEFINE sequence_2: PNALPH targname: # config: WFC opmode: IMAGE aperture: WFALL sp_element: F656N num_exp: 1 time_per_exp: 2100S priority: # param_1: CR-SPLIT=NO, param_2: PRE-FLASH=YES req_3: POS TARG 10,-10; comment_1: ONE ORBIT. ADJUST TIME +/- 20 PERCENT comment_2: TO FIT. ! linenum: 7.000 sequence_1: USE sequence_2: PN targname: NGC7293 priority: 1 req_1: CYCLE 3 / 7-13; ! linenum: 10.000 sequence_1: USE sequence_2: PN targname: NGC246 priority: 2 ! linenum: 11.000 sequence_1: USE sequence_2: PN targname: NGC1360 priority: 2 ! linenum: 13.000 sequence_1: USE sequence_2: PNALPH targname: NGC7293 priority: 2 ! linenum: 15.000 sequence_1: USE sequence_2: PNALPH targname: NGC6853 priority: 3 req_1: CYCLE 4 / 15-16; req_2: COND IF TAC OK / 15-16; ! linenum: 16.000 sequence_1: USE sequence_2: PNALPH targname: NGC7027 priority: 1 comment_1: THIS EXPOSURE WAS PLACED IN comment_2: PROPOSAL 1108 TO LINK WITH OTHER comment_3: OTHER CYCLE N NGC 7027 EXPOSURES. ! ! end of exposure logsheet ! No scan data records found