! File: 5115C.PROP ! Database: PEPDB ! Date: 23-FEB-1994:21:13:57 coverpage: title_1: CIRCUMSTELLAR MATERIAL (WC15) title_2: CYCLE 4 sci_cat: STELLAR ASTROPHYSICS 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: CIRCUMSTELLAR MATERIAL, PROTO-PLANETARY DISCS time_crit: Y pi_position: PROFESSOR OF PLANETA ! end of coverpage abstract: line_1: The cold circumstellar material discovered around a number of nearby stars by line_2: IRAS will be examined to determine the spatial distribution of the material line_3: around the individual stars, including estimates of the amount of distributed line_4: mass as a function of distance from the star. Such studies should provide line_5: insight into the formation and evolution of the proto-planetary disc that once line_6: surrounded the Sun. ! ! 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: These data will be acquired through the wide filter F555W; the line_2: bright star will be placed just off the edge of the WF/PC pyramid. line_3: In order to place the PSF wings from the bright star in exactly line_4: the same place for the target and the PSF star, the pointing accuracy line_5: must be at least as good as 1 WFC pixel (0.1 arcseconds). To achieve line_6: this, we absolutely REQUIRE that the same guide stars/FGSs be used line_7: for the initial pointing picture and the actual target exposure 3 line_8: days later, for each of the two targets and the two complementary PSFs. line_9: Thus 4 sets of guide star pairs are needed. These GS pairs must be line_10: in such an orientation/position that a slew of 13-14 arcseconds off line_11: the edge of WFC chip 2 (in 2 cases) or WFC chip 4 (in the other 2 cases) line_12: will not force a new set of guide stars. ! question: 5 section: 1 line_1: These are very bright stars and we are trying to detect very faint material line_2: near them. The delay of 3 days between when an initial pointing picture is line_3: taken (to measure the center of the greatly-saturated star) and the final line_4: science picture (of either the target or the PSF) is needed to analyze the line_5: data. After three days, an offset will be calculated and the telescope line_6: motion needed to place the target or PSF just off the edge of the pyramid line_7: is to be uplinked to the spacecraft just before the second picture of the line_8: sequence is taken. This should give us repeatably fine (0.1 arcsec) pointings. line_9: It is suggested that all four of the short, initial pictures be taken at one line_10: time, and that the four long science exposures be taken similarly together line_11: three days later. ! question: 13 section: 1 line_1: The cold circumstellar material discovered around a number of nearby stars by line_2: IRAS will be examined to determine the spatial distribution of the material line_3: around the individual stars, including estimates of the amount of distributed line_4: mass as a function of distance from the star. Such studies should provide line_5: insight into the formation and evolution of the proto-planetay disc that once line_6: surrounded the Sun. ! !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: 818-356-4900 ! lname: SMITH fname: BRADFORD mi: A. category: CON inst: UNIVERSITY OF HAWAII addr_1: INSTITUTE FOR ASTRONOMY addr_2: 2680 WOODLAWN DRIVE city: HONOLULU state: HI zip: 96822 country: USA phone: 808-956-6196 ! lname: FABER fname: SANDRA mi: M. category: CON inst: UC SANTA CRUZ - LICK OBSERVATORY addr_1: NATURAL SCIENCE II city: SANTA CRUZ state: CA zip: 95064 country: USA phone: 408-459-2944 ! ! end of general_form_address records fixed_targets: targnum: 2 name_1: BETA-PIC name_2: HD 39060 descr_1: BRIGHT STAR pos_1: RA= 5H 47M 17.1S +/-0.1S, pos_2: DEC= -51D 04' 00" +/-1" equinox: 2000. ! targnum: 3 name_1: ALPHA-PIC name_2: YBS 2550 descr_1: BRIGHT STAR pos_1: RA= 6H 48M 11.4S +/-0.1S, pos_2: DEC= -61D 56' 31" +/-0.1" equinox: ^ ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: DISKWF targname: # config: WFPC2 opmode: IMAGE aperture: WFALL-FIX sp_element: F953N num_exp: 1 time_per_exp: 0.11S priority: # param_2: CR-SPLIT=NO, param_3: CLOCKS=NO, req_1: POS TARG -67.3,68.3; comment_1: THIS POS-TARG PUTS THE BRIGHT comment_2: STAR AT (700,700) ON W2. TO comment_3: BE USED TO SET SCIENCE EXP comment_4: POINTING TO DESIRED ACCURACY. comment_5: CYCLE 5 ONLY VERSION comment_6: JAW/RML 6/5/93 ! linenum: 2.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: F555W num_exp: 1 time_per_exp: 1200S priority: ^ param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0, req_1: SAME POS FOR 2 AS 1; req_2: SAME ORIENT FOR 2 AS 1; req_3: REQ UPLINK; req_4: AFTER 1 BY 3D +/- 0.5D comment_1: THE UPLINK IS NEEDED FOR A SIP comment_2: TO PLACE THE SCIENCE OBJECT comment_3: 3" OFF PYRAMID EDGE BEFORE comment_4: EXP; OFF (800,800) BY 13.6". comment_5: POSITION MUST BE REPEATABLE comment_6: TO 1 PIXEL (0.1") ACCURACY ! linenum: 3.000 sequence_1: DEFINE sequence_2: COMPWF targname: # config: WFPC2 opmode: IMAGE aperture: WFALL-FIX sp_element: F953N num_exp: 1 time_per_exp: 0.11S priority: # param_2: CR-SPLIT=NO, param_3: CLOCKS=NO, req_1: POS TARG -67.3,68.3; comment_1: THIS POS-TARG PUTS THE BRIGHT comment_2: STAR AT (700,700) ON W2. TO comment_3: BE USED TO SET SCIENCE EXP comment_4: POINTING TO DESIRED ACCURACY. ! linenum: 4.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: F555W num_exp: 1 time_per_exp: 900S priority: ^ param_1: CR-SPLIT=0.5, param_2: CR-TOLERANCE=0.0, req_1: SAME POS FOR 4 AS 3; req_2: SAME ORIENT FOR 4 AS 3; req_3: REQ UPLINK; req_4: AFTER 3 BY 3D +/- 0.5D comment_1: THE UPLINK IS NEEDED FOR A SIP comment_2: TO PLACE THE SCIENCE OBJECT comment_3: 3" OFF PYRAMID EDGE BEFORE comment_4: EXP; OFF (800,800) BY 13.6". comment_5: POSITION MUST BE REPEATABLE comment_6: TO 1 PIXEL (0.1") ACCURACY ! linenum: 11.000 sequence_1: USE sequence_2: DISKWF targname: BETA-PIC priority: 9 req_1: CYCLE 5 / 11-12; req_2: GROUP 11-12 WITHIN 4D; req_3: AT 15-OCT-95 +/- 10D comment_1: ALL EXPOSURES REQUIRE comment_2: ACCURATE AND RELIABLY comment_3: REPEATABLE POS TARGS. comment_4: ALL INITIAL PICS CAN BE comment_5: TAKEN TOGETHER, ALL comment_6: LONG EXPS CAN BE ALSO. ! linenum: 12.000 sequence_1: USE sequence_2: COMPWF targname: ALPHA-PIC priority: 1 comment_1: PLACES A STAR SIMILAR TO comment_2: BETA PIC IN EXACTLY THE comment_3: SAME POSITION OFF WF2 ! ! end of exposure logsheet ! No scan data records found