! File: 4135C.PROP ! Database: PEPDB ! Date: 20-FEB-1994:10:06:40 coverpage: title_1: BINARIES IN GLOBULAR CLUSTERS (FOS 37) AUGMENTATION: title_2: FUTURE-CYCLE OBSERVATIONS sci_cat: STELLAR ASTROPHYSICS proposal_for: AUG/FOS cont_id: 3651 pi_title: PROF. pi_fname: BRUCE pi_lname: MARGON pi_inst: WASHINGTON, UNIVERSITY OF pi_country: USA pi_phone: 206-543-0089 hours_pri: 2.92 num_pri: 2 fos: Y ! end of coverpage abstract: line_1: The FOS GTO program includes a systematic study of degenerate stars line_2: in binary systems, both in the field and in globular clusters, plus a handful line_3: of related objects. The GTO program for the globular cluster systems line_4: involves WF/PC or FOC images to locate candidates for cluster X-ray sources line_5: (selection based on UV-excess in multicolor HST images), followed by confirming line_6: FOS spectroscopy. Even 1 or 2 new close binaries identified line_7: through this program will be extremely important, as these line_8: systems are thought to dominate the kinetic energy budget of line_9: globular clusters, yet virtually none are currently known. line_10: This program is for spectroscopic follow-up of candidates in line_11: NGC5139 (Omega-Cen), obtained from WFPC images acquired line_12: in earlier cycles. ! ! end of abstract general_form_proposers: lname: MARGON fname: BRUCE inst: UNIVERSITY OF WASHINGTON country: USA ! lname: HARMS fname: RICHARD title: PI mi: J. inst: APPLIED RESEARCH CORPORATION country: USA ! lname: BOHLIN fname: RALPH inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA ! lname: ANGEL fname: J. ROGER mi: P. inst: UNIVERSITY OF ARIZONA country: USA ! lname: BARTKO fname: FRANK inst: UNIVERSITY OF CALIFORNIA, SAN DIEGO country: USA ! lname: BEAVER fname: EDWARD inst: UNIVERSITY OF CALIFORNIA, SAN DIEGO country: USA ! lname: BURBIDGE fname: E. MARGARET inst: UNIVERSITY OF CALIFORNIA, SAN DIEGO country: USA ! lname: DAVIDSEN fname: ARTHUR mi: F. inst: JOHNS HOPKINS UNIVERSITY country: USA ! lname: FORD fname: HOLLAND mi: C. inst: JOHNS HOPKINS UNIVERSITY country: USA ! lname: HARTIG fname: GEORGE mi: F. inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA ! lname: ANDERSON fname: SCOTT mi: F. inst: UNIVERSITY OF WASHINGTON country: USA ! lname: DOWNES fname: RONALD mi: A. inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA ! lname: ALLEN fname: RICHARD mi: P. inst: UNIVERSITY OF ARIZONA country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: ! question: 3 section: 1 line_1: FOS spectra of globular cluster interacting binary candidates line_2: will be obtained for candidates selected from WFPC images line_3: obtained in cycle 2. If no interesting candidates are found in line_4: the cycle 2 images, no followup spectra will be taken. If an line_5: interesting looking candidate is found, then the specific line_6: FOS gratings to be used will be determined by the quality of the line_7: candidate. ! question: 4 section: 0 line_1: For this program, it is the high angular resolution of the line_2: HST which is most essential, although the UV capability is line_3: also exploited. WFPC images obtained in cycle 2 will be used line_4: to search relatively crowded regions of Omega-Cen with the aim of line_5: optically selecting (via UV excess) a candidate for the line_6: globular cluster X-ray source. This proposal is for the follow-up line_7: FOS spectroscopy if a suitable candidate is found. ! question: 5 section: 1 line_1: The previous cycle PC data in the COND IF will be used line_2: to select which of the FOS exposures will be executed. line_3: We will need to set the REJLIM parameter based on the true line_4: magnitude of the candidate star obtained from the PC images. ! question: 7 section: 1 line_1: Data reduction will be performed at the ST ScI, and the analysis will be line_2: performed using FOS IDT computer facilities. ! question: 8 section: 1 line_1: Candidates for spectroscopy will all appear in WFPC images line_2: obtained in cycle 2. If identical guide stars happen to be line_3: available for both observations, FOS acquisition could be line_4: significantly faster and more reliable. If not, we will offset from line_5: an arbitrary anonymous bright star in field, selected from the line_6: previously acquired PC images. ! question: 9 section: 0 line_1: Partial data from about a dozen different FOS/GTO programs (and many line_2: OV and SV proposals) have been obtained to date. This proposal includes line_3: augmentation time related to the following FOS/GTO and SAO proposals line_4: 1053, 3002, 3003, 3198, 3282 (Binaries in Globular Clusters); line_5: Among these related programs, data have been taken for SAO line_6: observations of M14 (proposals 3002 and 3003), and NGC6712 (proposal line_7: 1053). One relevant refereed paper has been published in ApJ Let. ! question: 10 section: 1 line_1: Data analysis, research assistant support, and funding will be provided under line_2: NASA's FOS GTO contract(s). The FOS IDT support includes a total of roughly line_3: 30 Ph.D. astronomers and graduate students at 5 different institutions. At line_4: each institution one or more workstations (typically Sparc 2's or the line_5: equivalent), plus one or more Microvaxes (or equivalent) are essentially line_6: devoted to processing of HST data. ! question: 13 section: 1 line_1: Multicolor WF/PC images obtained earlier in cycle 2 will be used to search line_2: for the optical counterparts of both central and noncentral X-ray sources. line_3: Objects identified through unusual colors in those WFPC images will be line_4: observed here with the FOS. ! !end of general form text general_form_address: lname: MARGON fname: BRUCE category: PI inst: UNIVERSITY OF WASHINGTON addr_1: ASTRONOMY DEPARTMENT, FM-20 city: SEATTLE state: WA zip: 98195 country: USA phone: 206 543-0089 telex: 4740096 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC5139-OFFSET descr_1: C,201,I,605 pos_1: TBD-EARLY, pos_2: RA = 13H 26M 15.3S+/-4S, pos_3: DEC = -47D 06' 58"+/-60" equinox: 1950 comment_1: POSITION WILL BE UPDATED comment_2: BASED ON CYCLE 2 IMAGES fluxnum_1: 1 fluxval_1: V = 15 +/- 3 ! targnum: 2 name_1: NGC5139-STAR descr_1: C,201,I,605 pos_1: TBD-EARLY, pos_2: RA-OFF = 0S +/-5.88S, pos_3: DEC-OFF = 0" +/- 60", pos_4: FROM 1 equinox: 1950 acqpr_1: COMP fluxnum_1: 1 fluxval_1: SURF(V) = 16.7 +/-0.5 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: OFFSET targname: # config: FOS/RD opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 2.1S fluxnum_1: 1 priority: 1 param_1: BRIGHT=33000, param_2: FAINT=660 comment_1: ACQUIRE OFFSET STAR. comment_2: THE EXPOSURE TIME AND POSITION comment_3: WILL BE UPDATED ONCE THE OBJECT comment_4: IS FOUND ON THE WF/PC IMAGE. ! linenum: 2.000 sequence_1: DEFINE sequence_2: IDGOOD targname: # config: FOS/RD opmode: ACCUM aperture: 0.5 sp_element: G650L num_exp: 1 time_per_exp: 7500S fluxnum_1: 1 priority: 1 comment_1: ID CERTAIN. ! linenum: 3.000 sequence_1: DEFINE sequence_2: IDBAD targname: # config: FOS/RD opmode: ACCUM aperture: 0.5 sp_element: PRISM num_exp: 1 time_per_exp: 5000S fluxnum_1: 1 priority: 1 comment_1: ID UNCERTAIN. ! linenum: 101.000 sequence_1: USE sequence_2: OFFSET targname: NGC5139-OFFSET req_1: ONBOARD ACQ FOR 102; req_2: SELECT 1 OF 101-102 OR 102.5-103; req_3: COND IF PREVIOUS CYCLE DATA OBTAINED AND req_4: UNAMBIGUOUS CANDIDATE FOUND / 101-102; req_5: REQ UPDATE; comment_1: BLIND OFFSET TO OBJECT. comment_2: COND ON IDENTIFICATION OF comment_3: UNAMBIGUOUS CANDIDATE FROM comment_4: CYCLE 2 PC IMAGES. GTO TO comment_5: CHOOSE BETWEEN 101-102 AND comment_6: 102.5-103 AND NOTIFY STSCI. ! linenum: 102.000 sequence_1: USE sequence_2: IDGOOD targname: NGC5139-STAR req_1: CYCLE 3 / 101-103 comment_1: REJLIM WILL NEED TO BE SET comment_2: BASED ON THE TRUE MAG OF THE STAR. comment_3: COND IF UNAMBIGUOUS CANDIDATE comment_4: FOUND IN CYCLE 2 PC IMAGES (SEE GF5) ! linenum: 102.500 sequence_1: USE sequence_2: OFFSET targname: NGC5139-OFFSET req_1: ONBOARD ACQ FOR 103; req_2: COND IF PREVIOUS CYCLE DATA OBTAINED AND req_3: AMBIGUOUS CANDIDATE FOUND / 102.5-103; req_4: REQ UPDATE; comment_1: BLIND OFFSET TO OBJECT. comment_2: COND ON IDENTIFICATION OF comment_4: AMBIGUOUS CANDIDATE FROM comment_5: CYCLE 2 PC IMAGES. ! linenum: 103.000 sequence_1: USE sequence_2: IDBAD targname: NGC5139-STAR comment_1: REJLIM WILL NEED TO BE SET comment_2: BASED ON THE TRUE MAG OF THE STAR. comment_3: COND IF AMBIGUOUS CANDIDATE comment_4: FOUND IN CYCLE 2 PC IMAGES (SEE GF5) ! ! end of exposure logsheet ! No scan data records found