! $Id: 5191,v 4.1 1994/07/27 15:50:20 pepsa Exp $ coverpage: title_1: HIGH RESOLUTION UV OBSERVATIONS OF 47TUC sci_cat: COOL STARS sci_subcat: OLD CLUSTERS proposal_for: SMC/ERO pi_title: DR. pi_fname: FRANCESCO pi_lname: PARESCE pi_inst: SPACE TELESCOPE SCIENCE INSTITUTE pi_country: USA pi_phone: 410-338-4823 hours_pri: 4.00 num_pri: 1 foc: Y ! end of coverpage abstract: line_1: M15 is the archetype of the post collapse globular cluster with a very dense line_2: core unresolvable from the ground and power law surface brightness radial line_3: profile. It also exhibits a central cusp in the velocity dispersion radial line_4: profile. All this indicates that the cluster has most likely experienced core line_5: collapse. It is not clear yet what state it finds itself in now but it seems line_6: likely that it may be rebounding from its approach to the singularity either line_7: because of the production of energy producing hard binaries or of a black hole. line_8: Early HST observations of the core of M15 have been inconclusive in this regard line_9: in that the specific character of core collapse is impressed on the stellar line_10: density radial profile within 1" or so from the gravity center, well within the line_11: aberrated wings of the PSF. WF/PC observations in the U band indicate a core of line_12: radius 2.2"=0.13pc due to an unresolved stellar component fainter than U=18. line_13: Multicolor FOC observations show that there is a significant population of line_14: UV-bright stars in this area. The only way to measure this crucial radius and line_15: thus determine unambiguosly the evolutionary status of this object is to resolve line_16: the faint stars in the core with the highest possible resolution and line_17: sensitivity. Only the FOC F/96 relay with COSTAR can do this job properly, with line_18: tremendous scientific impact brought by the first measurement of a collapsed line_19: core, possible indications of a black hole, a new population of blue objects and line_20: the first observations of white dwarfs. ! ! end of abstract general_form_proposers: lname: PARESCE fname: FRANCESCO title: DR. inst: STSCI country: USA esa: Y ! lname: SPARKS fname: WILLIAM title: DR. mi: B inst: STSCI country: USA ! ! end of general_form_proposers block ! No records found general_form_address: lname: PARESCE fname: FRANCESCO title: DR. category: PI inst: SPACE TELESCOPE SCIENCE INSTITUTE addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA phone: 410-338-4823 telex: 410-338-4767 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC104 descr_1: C,201 pos_1: RA = 00H 24M 6.0S +/- 0.03S, pos_2: DEC = -72D 04' 52.7" +/- 0.5" equinox: 2000 pm_or_par: N ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 0.500 targname: NGC104 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F253M num_exp: 1 time_per_exp: 10M priority: 1 param_1: PIXEL=50X25 req_1: INT ACQ FOR 1-5; req_2: CYCLE 4; ! linenum: 1.000 targname: NGC104 config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: F253M num_exp: 2 time_per_exp: 30M priority: 1 req_1: CYCLE 4; req_2: GROUP 1-5 NO GAP ! linenum: 2.000 targname: NGC104 config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: F342W,F4ND num_exp: 1 time_per_exp: 20M priority: 1 req_1: CYCLE 4 ! linenum: 3.000 targname: NGC104 config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: F346M,F4ND num_exp: 1 time_per_exp: 10M priority: 1 req_1: CYCLE 4 ! linenum: 4.000 targname: NGC104 config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: F346M,F1ND num_exp: 2 time_per_exp: 15M priority: 1 req_1: CYCLE 4 ! linenum: 5.000 targname: NGC104 config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: F195W num_exp: 2 time_per_exp: 20M priority: 1 req_1: CYCLE 4 ! ! end of exposure logsheet ! No scan data records found