! File: 1133C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:02:59:08 coverpage: title_1: URANUS SATELLITE AND RING SEARCH (WF/PC-29): title_2: CYCLE 3 AND FUTURE-CYCLE CONTINUATION sci_cat: SOLAR SYSTEM 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: SATELLITES, URANUS, RINGS hours_pri: 0.80 num_pri: 1 time_crit: X pi_position: PROFESSOR OF PLANETA ! end of coverpage abstract: line_1: The narrow rings of Uranus have been discovered and observed by occulations of line_2: stars. Images of the individual rings have not been achieved. These line_3: observations are an attempt at direct imaging of the individual rings. line_5: The narrow rings of Uranus, according to theory, are constrained by shepherding line_6: satellites. The observations will be searched for shepherding satellites line_7: brighter than 22nd magnitude and a completeness survey of inner satellites of line_8: Uranus down to that magnitude will be performed. The short exposures will line_9: provide accurate positions of the known satellites and a means of determining line_10: the positions of the faint discovery satellites with respect to Uranus. ! ! 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: 2 section: 1 line_1: The narrow rings of Uranus have been discovered and observed by occultations of line_2: stars. Images of the individual rings have not been achieved. These line_3: observations are an attempt at direct imaging of the individual rings. line_5: The narrow rings of Uranus, according to theory are constrained by shepherding line_6: satellites. The observations will be searched for shepherding satellites line_7: brighter than 22nd magnitude and a completeness survey of inner satellites of line_8: Uranus down to that magnitude will be performed. The short exposures will line_9: provide accurate positions of the known satellites and a means of determining line_10: the positions of the faint discovery satellites with respect to Uranus. ! question: 3 section: 1 line_1: The Space Telescope should be pointed so that Uranus is just off the corner of line_2: the Wide Field camera field-of-view. A sequence of exposures is taken. Then line_3: the pointing is changed so that Uranus is just off another corner of the Wide line_4: Field camera field-of-view, and a sequence of exposures is taken. This line_5: procedure is continued to take a series of four pointings around Uranus and line_6: then another complete cycle of four pointings around Uranus is made. line_8: Observations to be made in Cycle 9. ! question: 5 section: 1 line_1: Observe near opposition (June 11, 1986, June 16, 1987, June 20, 1988). Need to line_2: accurately place Uranus off edge of field (see diagram on exposure logsheet). ! question: 13 section: 1 line_1: A series of exposures will be made around Uranus with one filter to attempt to line_2: obtain direct images of the narrow rings and to search for faint satellites. ! !end of general form text general_form_address: lname: SEIDELMANN fname: P. mi: K. category: CON inst: US NAVAL OBSERVATORY addr_1: NAUTICAL ALMANAC OFFICE city: WASHINGTON state: DC zip: 20390 country: USA phone: (202) 653-1545 ! lname: GUNN fname: JAMES mi: E. category: CON inst: PRINCETON UNIVERSITY addr_1: ASTROPHYSICAL SCIENCE addr_2: PEYTON HALL city: PRINCETON state: NJ zip: 08540 country: USA phone: (609) 452-3802 ! lname: FABER fname: SANDRA mi: M. category: CON inst: UC SANTA CRUZ - LICK OBSERVATORY addr_1: NATURAL SCIENCE II, BLDG. 160 city: SANTA CRUZ state: CA zip: 95064 country: USA phone: (408) 429-2944 ! lname: WESTPHAL fname: JAMES mi: A. title: PROF. category: PI inst: CALTECH addr_1: M/2 170-25 addr_2: DIVISION OF GEOLOGICAL addr_3: & PLANETARY SCIENCES city: PASADENA state: CA zip: 91125 country: USA phone: (818) 356-4900 ! ! end of general_form_address records ! No fixed target records found solar_system_targets: targnum: 1 name_1: URANUS descr_1: OTHER URANIAN SATELLITES lev1_1: STD = URANUS ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: URSAT targname: # config: WFC opmode: IMAGE aperture: WFALL sp_element: F606W num_exp: 1 time_per_exp: 2S priority: # param_1: CR-SPLIT=NO, param_2: PRE-FLASH=YES, param_3: CLOCKS=YES req_1: SEQ 1-2 NO GAP; req_2: NON-INT / 1-13; comment_1: CYCLE 3-9 VERSION; comment_2: JEG/RML 3/25/92 17:10. ! linenum: 2.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: 120S priority: ^ param_1: CR-SPLIT=NO, param_2: PRE-FLASH=YES, param_3: CLOCKS=YES, param_4: PURGE=YES ! linenum: 4.000 sequence_1: USE sequence_2: URSAT targname: URANUS priority: 2 req_1: POS TARG 11.0,-9.0; req_2: SEQ 4-5 WITHIN 96M; req_3: SEQ 4-13 WITHIN 300M; req_4: CYCLE 3 / 4-13; comment_1: REQUESTED TOLERANCE IN POS TARG: comment_2: +/-0.1"(X) AND +/-0.1"(Y), 4-13 comment_3: REQ: AT 7-JUL-1992 +/- 20D; ! linenum: 5.000 sequence_1: ^ targname: ^ priority: ^ req_1: POS TARG 9.0,-11.0; ! linenum: 8.000 sequence_1: ^ targname: ^ priority: ^ req_1: POS TARG 11.0,-9.0; req_2: SEQ 8-9 WITHIN 96M; req_3: AFTER 4 BY 96M +/- 10M; ! linenum: 9.000 sequence_1: ^ targname: ^ priority: ^ req_1: POS TARG 9.0,-11.0; ! linenum: 12.000 sequence_1: ^ targname: ^ priority: ^ req_1: POS TARG 11.0,-9.0; req_2: SEQ 12-13 WITHIN 96M; req_3: AFTER 4 BY 192M +/- 10M; ! linenum: 13.000 sequence_1: ^ targname: ^ priority: ^ req_1: POS TARG 9.0,-11.0; ! ! end of exposure logsheet ! No scan data records found