! File: 1017C.PROP ! Database: PEPDB ! Date: 15-FEB-1994:22:37:12 coverpage: title_1: STELLAR CONTENT OF NGC 6121 AND NGC 6397: FUTURE-CYCLE title_2: CONTINUATION sci_cat: STELLAR POPULATIONS proposal_for: GTO/OS pi_title: DR. pi_fname: JOHN pi_mi: N. pi_lname: BAHCALL pi_inst: INSTITUTE FOR ADVANCED STUDY pi_country: USA pi_phone: (609) 734-8054 keywords_1: GLOBULAR CLUSTER, GALACTIC, IMAGING, WHITE DWARF, keywords_2: DWARF, STELLAR POPULATION hours_pri: 3.00 num_pri: 2 wf_pc: X pi_position: PROF. JOHN BAHCALL off_fname: ALLEN off_lname: ROWE off_title: ASSOC DIR ADM/FIN off_addr_1: INSTITUTE FOR ADVANCED STUDY off_addr_2: OLDEN LANE off_city: PRINCETON off_state: NJ off_zip: 08540 off_country: USA off_phone: (609) 734-8205 off_telex: 837680 ! end of coverpage abstract: line_1: The stellar content of the cores of the globular clusters NGC 6121 and NGC line_2: 6397 will be determined using the WFC. Of special interest will be the line_3: observed numbers of white dwarfs, the other ultra-violet excess stars, and line_4: the faint red dwarfs. ST observations are needed in order to reach the line_5: required faint apparent magnitudes and to provide sufficient spatial resolution line_6: to allow accurate photometry. ! ! end of abstract general_form_proposers: lname: BAHCALL fname: JOHN mi: N. inst: INSTITUTE FOR ADVANCED STUDY country: USA ! 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 WFC will be used for one orbit (45 minute) exposures on the core of line_2: each globular cluster. The filters to be used are: F555W (30% V); F785LP (I); line_3: and F336M (U). line_5: Cycle 2 (7-18 months) = Exposures 1-3. line_6: Cycle 3+4 (months 19-30) = Exposures 4-5. ! question: 4 section: 1 line_1: ST observations are necessary in order to reach the required apparent line_2: magnitude limits and to provide sufficient spatial resolution to permit line_3: accurate photometry. ! question: 5 section: 1 line_1: Would like roll angle for exposures 1-3 t be the same so that can compare line_2: simply images on each of the exposures to determine colors. Similarly, want line_3: roll angles of exposures 4 and 5 to be the same. ! question: 6 section: 1 line_1: Dark time is required. The success of the program depends upon the line_2: ability to study faint stellar images with V>~ 26 mag. ! question: 7 section: 1 line_1: Data reduction and analysis will be performed jointly by John Bahcall (and line_2: collaborators) and members of the WF/PC team. ! question: 10 section: 1 line_1: Computing facilities and research associates will be provided as line_2: necessary. ! question: 13 section: 1 line_1: The stellar content of the cores of the globular clusters NGC 6121 and NGC line_2: 6397 will be determined using the WFC. Of special interest will be the line_3: observed numbers of white dwarfs, the other ultra-violet excess stars, and the line_4: faint red dwarfs. ! !end of general form text general_form_address: lname: BAHCALL fname: JOHN mi: N. title: DR. category: PI inst: INSTITUTE FOR ADVANCED STUDY addr_1: OLDEN LANE city: PRINCETON state: NJ zip: 08540 country: USA phone: (609) 734-8054 telex: 837680 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC6121 name_2: M4 descr_1: GALACTIC GLOBULAR CLUSTER pos_1: RA = 16H 20M 31.4S +/- 0.1S, pos_2: DEC = -26D 24' 36.4" +/- 1" equinox: 1950 pm_or_par: NO fluxnum_1: 1 fluxval_1: SURF(V) = 18.0, fluxval_2: E(B-V) = 0.35 ! targnum: 2 name_1: NGC6397 descr_1: GALACTIC GLOBULAR CLUSTER pos_1: RA = 17H 36M 37.1S +/- 0.1S, pos_2: DEC = -53D 38' 52.0" +/- 1" equinox: 1950 pm_or_par: N fluxnum_1: 1 fluxval_1: SURF(V) = 16.8, fluxval_2: E(B-V) = 0.18 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: NGC6397 config: WFC opmode: IMAGE aperture: ALL sp_element: F555W num_exp: 3 time_per_exp: 700S fluxnum_1: 1 priority: 3 param_1: PRE-FLASH=NO , param_2: CR-SPLIT=NO , param_3: CLOCKS=YES, param_4: PURGE=YES req_1: CYCLE 9 / 1-5 ; req_2: SEQ 3,3.1,2,1 NO GAP ; req_3: DARK TIME / 1-5 ; req_4: NON-INT / 1-5 comment_1: LINE 1 IS INTENDED TO comment_2: FIT INTO ONE ORBIT. ADJUST comment_3: 700S EXPOSURE TIME +/- 20 comment_4: PERCENT TO ACCOMPLISH. FINAL comment_5: PURGE ON BRIGHT SIDE AFTER comment_6: LAST EXPOSURE. ! linenum: 2.000 targname: NGC6397 config: WFC opmode: IMAGE aperture: ALL sp_element: F785LP num_exp: 5 time_per_exp: 450S fluxnum_1: 1 priority: 3 param_1: PRE-FLASH=YES , param_2: CR-SPLIT=NO, param_3: CLOCKS=YES, param_4: PURGE=YES comment_1: LINE 2 IS INTENDED TO comment_2: FIT INTO ONE ORBIT. ADJUST comment_3: 450S EXPOSURE TIME +/- 20 comment_4: PERCENT TO ACCOMPLISH. FINAL comment_5: PURGE ON BRIGHT SIDE AFTER comment_6: LAST EXPOSURE. ! linenum: 3.000 targname: NGC6397 config: WFC opmode: IMAGE aperture: ALL sp_element: F336W num_exp: 1 time_per_exp: 500S fluxnum_1: 1 priority: 3 param_1: PRE-FLASH=YES , param_2: CR-SPLIT=NO, param_3: CLOCKS=YES, param_4: PURGE=YES req_1: SAME ORIENT FOR 2-3.1 AS 1 ! linenum: 3.100 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 2000S fluxnum_1: 1 priority: ^ param_1: PRE-FLASH=YES , param_2: CR-SPLIT=NO, param_3: CLOCKS=YES, param_4: PURGE=YES comment_1: LINES 3-3.1 ARE INTENDED TO comment_2: FIT INTO ONE ORBIT. ADJUST comment_3: 2000S EXPOSURE TIME +/- 20 comment_4: PERCENT TO ACCOMPLISH. FINAL comment_5: PURGE ON BRIGHT SIDE AFTER comment_6: LAST EXPOSURE. ! linenum: 4.000 targname: NGC6121 config: WFC opmode: IMAGE aperture: ALL sp_element: F555W num_exp: 3 time_per_exp: 15M fluxnum_1: 1 priority: 2 ! linenum: 5.000 targname: NGC6121 config: WFC opmode: IMAGE aperture: ALL sp_element: F785LP num_exp: 6 time_per_exp: 7.5M fluxnum_1: 1 priority: 2 req_1: SAME ORIENT FOR 5 AS 4 ! ! end of exposure logsheet ! No scan data records found