! File: 3684C.PROP ! Database: PEPDB ! Date: 19-FEB-1994:16:12:12 coverpage: title_1: GLOBULAR CLUSTERS 47 TUC AND NGC6752 sci_cat: STELLAR POPULATIONS sci_subcat: GLOBULAR CLUSTERS proposal_for: AUG/OS cont_id: 1279 pi_title: PROF. pi_fname: IVAN pi_mi: R. pi_lname: KING pi_inst: UNIVERSITY OF CALIFORNIA, BERKELEY pi_country: USA pi_phone: (510)642-2206 keywords_1: GLOBULAR CLUSTER hours_pri: 13.00 hours_par: 13.00 num_pri: 13 num_par: 13 wf_pc: Y foc: Y pi_position: PROF. OF ASTRONOMY ! end of coverpage abstract: line_1: This proposal is devoted completely to globular clusters. It line_2: studies the two clusters NGC104 (47 Tuc) and NGC6752 in B and V, line_3: down to below 24th magnitude. Fields at the center and at 1 and 3 line_4: core radii will allow determination of the luminosity function and line_5: its variation with radial position. This will in turn allow a line_6: determination of the degree of equipartition, which cannot be line_7: observed from the ground. At the same time the WFC will concentrate line_8: on a single field in each cluster in V and I, reaching a limit of line_9: about 26th magnitude, for the faint luminosity function at a radius line_10: of 6.5 arcmin. In addition, a far-UV image is taken of the center line_11: of NGC6752, to study the distribution of extremely blue objects. ! ! end of abstract general_form_proposers: lname: KING fname: IVAN title: PROF. mi: R. inst: UNIV. OF CALIFORNIA country: U.S.A. ! lname: MACCHETTO fname: DUCCIO title: DR. inst: STSCI country: U.S.A. esa: Y ! lname: GREENFIELD fname: PERRY title: DR. mi: S. inst: STSCI country: U.S.A. ! ! end of general_form_proposers block general_form_text: question: 3 section: 0 line_1: For NGC104(47 Tuc) and NGC6752, pairs of 60m FOC96 exposures with line_2: F430W and F480LP. In each cluster, fields at the center, at one core line_3: radius, and at 3 core radii. 47 Tuc will need 4ND at the center, 3ND line_4: for the next field, and none for the outer one. IN NGC 6752, the line_5: center will get 2ND and the next field 1ND. (These figures are based line_6: on existing images of 47 Tuc, along with relative surface line_7: brightnesses observed from the ground.) In addition, during the FOC line_8: exposures on all 3 fields, the WFC will remain on the same outer line_9: field, taking parallel exposures. Its time is at present planned to line_10: be divided equally between F555W and F785LP. line_12: In addition, exposures are taken of NGC6752 with FOC96+F175W, again line_13: with parallel WFC in the visible. ! question: 4 section: 0 line_1: With ground-based resolution, the centers of globular clusters are line_2: just a saturated blur. Even in looser clusters, where the brighter line_3: stars are resolvable, the fainter stars can still not be reached. line_4: Only the resolution of HST makes it possible to probe the centers of line_5: globular clusters to faint limits. ! question: 5 section: 0 line_1: FOC experience shows that a 2400s exposure in F430W detects B=24.5 line_2: (P. Jakobsen, private communication). A 3600s total goes a little line_3: fainter and makes more efficient use of the two orbits needed. (The line_4: ND's required by the high surface brightness reduce this line_5: considerably in the centers.) Since the main-sequence turnoffs line_6: are at V=18 to 19, these exposures reach far enough down the main line_7: sequence to get mass differentiation. line_9: The WFC material will stack 6 single-orbit observations and thus go line_10: a magnitude fainter than one single-orbit exposure. With the line_11: greater sensitivity of the WFC at these wavelengths, comparison with line_12: the FOC figures predicts limiting magnitudes of 26.5 or fainter. ! question: 6 section: 1 line_1: Note that all FOC exposures have parallel WFC exposures (so that the line_2: true efficiency of HST usage is much higher than indicated by the line_3: percentage quoted in Phase I.) At Phase II, ORIENT will be a line_4: requirement on all primary exposures. No guide-star limitations are line_5: anticipated for these clusters. ! question: 6 section: 2 line_1: It is assumed that PSF's will be available without the need to add line_2: observations to this program to secure them. ! question: 7 section: 0 line_1: At Berkeley we have a VMS cluster and a Sun cluster. I have a line_2: Microvax II GPX and a Sun IPC with a gigabyte disk. For software we line_3: have been using Vista, DAOPHOT, and IRAF/STSDAS. Although it is an line_4: unhappy fact that no one has yet arrived at the ideal method of line_5: doing stellar photometry on HST images, I am doing at least as well line_6: as anyone else and am in contact with most of those who are making line_7: efforts in this direction. line_9: Greenfield and Macchetto, at STScI, have access to all the resources line_10: of the Institute in general, and of the FOC group in particular. line_12: Djorgovski also has a Microvax GPX, so that that part of our line_13: software is completely interchangeable. He is also adept at line_14: Maximum-Entropy deconvolutions with MEMSYS-3 (for which a Convex is line_15: available), and he already has used it on collapsed-core clusters. ! question: 8 section: 0 line_1: A related proposal is being submitted by Shara, to observe blue line_2: stragglers in the centers of several globular clusters. (I am a line_3: Co-I.) It differs from the present proposal in that it works in the line_4: far UV, to select blue objects. The exposures of that program will line_5: not serve the purposes of the present program. Similarly, the line_6: proposal of Rich (again I am a Co-I) is far-UV and will not work line_7: here. The post-collapse-core proposal by Djorgovski (I am a line_8: Co-I) does not overlap with this one, since this one no longer line_9: includes a collapsed-core part. ! question: 9 section: 1 line_1: Previous HST observing time: line_3: SAO-3121, MORPHOLOGY OF FAINT GALAXIES - PART II line_4: GTO-1277, IMAGING OF M31-GROUP GALAXIES line_5: GTO-1278, SPECTROSCOPY OF THE CENTERS OF M31, M32, AND NGC 205 line_6: GTO-1279, STRUCTURE OF GLOBULAR CLUSTERS line_7: GTO-1280, COLLAPSED CORES OF GLOBULAR CLUSTERS line_8: GTO-1281, THE FAINT POPULATION IN BAADE'S WINDOW line_9: GTO-1282, IMAGING OF HIGH-REDSHIFT FIELD GALAXIES AND CLUSTERS line_10: GTO-3217, (continuation of 1280) line_11: GTO-3218, (continuation of 1279) line_12: GTO-3219, (continuation of 1277) line_13: GTO-3325, (continuation of 1279, 3218) line_15: 1279 is closely related to this proposal, which is intended to line_16: bring the aggregate up to a critical mass. ! question: 9 section: 2 line_1: Main results from previous related programs: line_3: 3121 produced a report that I am told was quite useful to the Cycle line_4: 1 Re-TAC, and also the publication below. line_6: Otherwise all I have gotten up to now is a pair of exposures on the line_7: center of Omega Centauri, which are in the early stages of line_8: reduction, as well as the center of M32 and of the collapsed-core line_9: globular cluster NGC7099,likewise under reduction. line_11: In Cycle 1 I have put all of 1281 and all of the 1279 exposures on line_12: NGC6624. ! question: 9 section: 3 line_1: "The Current Ability of HST to Reveal Morphological Structure in line_2: Medium-Redshift Galaxies", King, I.R., et al. (8 other authors), line_3: Astron. J. 102, 1553, 1992. ! question: 10 section: 0 line_1: Hardware/software as above. Postdoc + RA's. GTO funding (from line_2: NASA). ! !end of general form text general_form_address: lname: KING fname: IVAN mi: R. title: PROF. category: PI inst: UNIVERSITY OF CALIFORNIA, BERKELEY addr_1: ASTRONOMY DEPARTMENT addr_2: UNIVERSITY OF CALIFORNIA city: BERKELEY state: CA zip: 94720 country: U.S.A. phone: (510)642-2206 telex: (910)366-7114 from_date: 15-MAR-92 to_date: 31-DEC-99 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC104 name_2: 47 TUC descr_1: C,201 pos_1: RA = 00H 21M 52.3S +/- 0.1S, pos_2: DEC = -72D 21' 27" +/-1" equinox: 1950 ! targnum: 2 name_1: NGC6752 descr_1: C,201 pos_1: RA = 19H 06M 27.3S +/- 0.1S, pos_2: DEC = -60D 03' 51" +/- 1" equinox: 1950 comment_1: THE FOLLOWING ARE PARALLEL TARGETS ! targnum: 3 name_1: NGC104-OUTER descr_1: C,201,911 pos_1: RA = 00H 21M 52.3S, pos_2: DEC = -72D 21' 27", pos_3: REGION, pos_4: R = 7' equinox: 1950 ! targnum: 9 name_1: NGC6752-OUTER descr_1: C,201,911 pos_1: RA = 19H 06M 27.3S, pos_2: DEC = -60D 03' 51", pos_3: REGION, pos_4: R = 7' equinox: 1950 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: STD targname: # config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: # num_exp: 1 time_per_exp: 67.8M priority: # ! linenum: 2.000 sequence_1: DEFINE sequence_2: WFL targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: # num_exp: 1 time_per_exp: 67.8M priority: # param_1: CR-SPLIT=NO, param_2: PRE-FLASH=NO ! linenum: 3.000 sequence_1: USE sequence_2: STD targname: NGC104 sp_element: F430W,F4ND priority: 1 req_1: ORIENT 250.0D +/-40D; req_2: GROUP 3,5 NO GAP; req_3: CYCLE 2 /3-28 ! linenum: 4.000 sequence_1: USE sequence_2: WFL targname: NGC104-OUTER sp_element: F555W priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 3 ! linenum: 5.000 sequence_1: USE sequence_2: STD targname: NGC104 sp_element: F480LP,F4ND priority: 1 req_1: SAME ORIENT FOR 5 AS 3; req_2: SAME POS FOR 5 AS 3 ! linenum: 6.000 sequence_1: USE sequence_2: WFL targname: NGC104-OUTER sp_element: F785LP priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 5 ! linenum: 7.000 sequence_1: USE sequence_2: STD targname: NGC104 sp_element: F430W,F2ND,F1ND priority: 1 req_1: POS TARG -3.0,27.9; req_2: ORIENT +4.1D +/-0.05D FROM 3; req_3: GROUP 7,9 NO GAP comment_1: POSITION OF FOC/96 IS OFFSET FROM comment_2: LINE 3 BY 28.1", IN A DIRECTION SUCH comment_3: THAT RELATIVE ORIENTATION SHOULD comment_4: THEN PLACE WFC IN SAME POSITION FOR comment_5: LINE 8 AS FOR LINE 4. ! linenum: 8.000 sequence_1: USE sequence_2: WFL targname: NGC104-OUTER sp_element: F555W priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 7 ! linenum: 9.000 sequence_1: USE sequence_2: STD targname: NGC104 sp_element: F480LP,F2ND,F1ND priority: 1 req_1: SAME ORIENT FOR 9 AS 7; req_2: SAME POS FOR 9 AS 7 ! linenum: 10.000 sequence_1: USE sequence_2: WFL targname: NGC104-OUTER sp_element: F785LP priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 9 ! linenum: 11.000 sequence_1: USE sequence_2: STD targname: NGC104 sp_element: F430W priority: 1 req_1: POS TARG -14.8,82.9; req_2: ORIENT +12.3D +/-0.05D FROM 5; req_3: AFTER 5; req_4: GROUP 11,13 NO GAP comment_1: POSITION OF FOC/96 IS OFFSET FROM comment_2: LINE 3 BY 84.2", IN A DIRECTION SUCH comment_3: THAT RELATIVE ORIENTATION SHOULD comment_4: THEN PLACE WFC IN SAME POSITION FOR comment_5: LINE 12 AS FOR LINE 4. ! linenum: 12.000 sequence_1: USE sequence_2: WFL targname: NGC104-OUTER sp_element: F555W priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 11 ! linenum: 13.000 sequence_1: USE sequence_2: STD targname: NGC104 sp_element: F480LP priority: 1 req_1: SAME ORIENT FOR 13 AS 11; req_2: SAME POS FOR 13 AS 11 ! linenum: 14.000 sequence_1: USE sequence_2: WFL targname: NGC104-OUTER sp_element: F785LP priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 13 ! linenum: 15.000 sequence_1: USE sequence_2: STD targname: NGC6752 sp_element: F430W,F2ND priority: 1 req_1: ORIENT 40D +/-30D; req_2: GROUP 15,17 NO GAP ! linenum: 16.000 sequence_1: USE sequence_2: WFL targname: NGC6752-OUTER sp_element: F555W priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 15 ! linenum: 17.000 sequence_1: USE sequence_2: STD targname: NGC6752 sp_element: F480LP,F2ND priority: 1 req_1: SAME ORIENT FOR 17 AS 15; req_2: SAME POS FOR 17 AS 15 ! linenum: 18.000 sequence_1: USE sequence_2: WFL targname: NGC6752-OUTER sp_element: F785LP priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 17 ! linenum: 19.000 sequence_1: USE sequence_2: STD targname: NGC6752 sp_element: F430W,F1ND priority: 1 req_1: POS TARG -3.2,29.9; req_2: ORIENT +4.4D +/-0.05D FROM 15; req_3: AFTER 15; req_4: GROUP 19,21 NO GAP comment_1: POSITION OF FOC/96 IS OFFSET FROM comment_2: LINE 15 BY 30.1", IN A DIRECTION SUCH comment_3: THAT RELATIVE ORIENTATION SHOULD comment_4: THEN PLACE WFC IN SAME POSITION FOR comment_5: LINE 20 AS FOR LINE 16. ! linenum: 20.000 sequence_1: USE sequence_2: WFL targname: NGC6752-OUTER sp_element: F555W priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 19 ! linenum: 21.000 sequence_1: USE sequence_2: STD targname: NGC6752 sp_element: F480LP,F1ND priority: 1 req_1: SAME ORIENT FOR 21 AS 19; req_2: SAME POS FOR 21 AS 19 ! linenum: 22.000 sequence_1: USE sequence_2: WFL targname: NGC6752-OUTER sp_element: F785LP priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 21 ! linenum: 23.000 sequence_1: USE sequence_2: STD targname: NGC6752 sp_element: F430W priority: 1 req_1: POS TARG -16.6,88.7; req_2: ORIENT +13.2D +/-0.05D FROM 15; req_3: AFTER 15; req_4: GROUP 23,25 NO GAP comment_1: POSITION OF FOC/96 IS OFFSET FROM comment_2: LINE 15 BY 90.2", IN A DIRECTION SUCH comment_3: THAT RELATIVE ORIENTATION SHOULD comment_4: THEN PLACE WFC IN SAME POSITION FOR comment_5: LINE 24 AS FOR LINE 16. ! linenum: 24.000 sequence_1: USE sequence_2: WFL targname: NGC6752-OUTER sp_element: F555W priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 23 ! linenum: 25.000 sequence_1: USE sequence_2: STD targname: NGC6752 sp_element: F480LP priority: 1 req_1: SAME ORIENT FOR 25 AS 23; req_2: SAME POS FOR 25 AS 23 ! linenum: 26.000 sequence_1: USE sequence_2: WFL targname: NGC6752-OUTER sp_element: F785LP priority: 1 req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 25 ! linenum: 27.000 targname: NGC6752 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F175W num_exp: 1 time_per_exp: 60M priority: 1 param_1: PIXEL=50X25 req_1: SAME ORIENT FOR 27 AS 15; req_2: AFTER 15; comment_1: ORIENTATION SHOULD PLACE comment_2: WFC IN SAME POSITION FOR LINE 28 comment_3: AS FOR LINE 16. ! linenum: 28.000 targname: NGC6752-OUTER config: WFC opmode: IMAGE aperture: ALL sp_element: F785LP num_exp: 1 time_per_exp: 60M priority: 1 param_1: CR-SPLIT=NO, param_2: PRE-FLASH=NO req_1: PAR comment_1: INTENDED TO BE PARALLEL WITH 27 ! ! end of exposure logsheet ! No scan data records found