! $Id: 5344,v 7.1 1994/07/27 16:53:03 pepsa Exp $ coverpage: title_1: SEARCH FOR OPTICAL COUNTERPARTS OF GLOBULAR CLUSTER X-RAY SOURCES title_2: CYCLE4MEDIUM sci_cat: HOT STARS sci_subcat: X-RAY BINARIES proposal_for: GO pi_fname: CHARLES pi_mi: D pi_lname: BAILYN pi_inst: YALE UNIVERSITY pi_country: USA pi_phone: (203) 432 3022 hours_pri: 2.30 num_pri: 2 wf_pc: Y off_fname: SUZANNE K. off_lname: POLMAR off_title: DIRECTOR off_addr_1: GRANTS AND CONTRACTS ADMINISTRATION off_addr_2: 12 PROSPECT PLACE off_city: NEW HAVEN off_state: CT off_zip: 06511 off_country: USA off_phone: (203) 432 2460 ! end of coverpage abstract: line_1: Our previous HST WFPC imaging uncovered 3 promising candidate optical line_2: counterparts for low luminosity X-ray sources in the nearby globular line_3: cluster NGC 6397. Identification of these sources is essential to line_4: determine their nature, evolution, and contribution to the dynamics line_5: of the clusters. Here we propose to use WFPC2 to search for line_6: counterparts to X-ray sources in two other clusters (NGC 6752 and line_7: M22 = NGC 6656) in which high spatial resultion ROSAT imaging has line_8: been carried out. Our procedure is the same as previously: we will line_9: image the cluster cores in H-alpha, R and B filters, and identify line_10: blue H-alpha bright objects. Particular aims of this study include line_11: identifying any differences in X-ray source populations which line_12: correlate with the different dynamical states of the target clusters, line_13: and exploring the possibility that some fo the sources may be line_14: quiescent neutron stars. ! ! end of abstract general_form_proposers: lname: BAILYN ! lname: COOL fname: ADRIENNE inst: CFA, 60 GARDEN ST. CAMBRIDGE, MA 02138 ! lname: GRINDLAY fname: JOSH inst: CFA, 60 GARDEN ST. CAMBRIDGE, MA 02138 ! lname: CALLANAN fname: PAUL inst: CFA, 60 GARDEN ST. CAMBRIDGE, MA 02138 ! lname: COHN fname: HALDAN inst: INDIANA UNIV. SAWIN, WEST 319, BLOOMINGTON, IN 47405 ! lname: LUGGER fname: PHYLLIS inst: INDIANA UNIV. SAWIN, WEST 319, BLOOMINGTON, IN 47405 ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: We adopt a plan for our observations which we used in our successful line_2: cycle 2 program. Each observation in each filter is divided into at line_3: least 2 long exposures (<=1200s), and a single exposure 10 times line_4: shorter than the individual long exposures. This procedure allows line_5: us to control for cosmic rays and saturated stars. The individual line_6: exposures for each traget are listed below: line_9: cluster H-alpha (=F656N) R (=F675W) B (=F439W) line_11: NGC 6752 5 x 1200s 2 x 180s 2 x 700s line_12: 1 x 120s 1 x 18s 1 x 70s line_14: M22 3 x 1100s 2 x 100s 2 x 400s line_15: (=NGC 6656) 1 x 120s 1 x 10s 1 x 40s ! question: 4 section: 1 line_1: The crowded conditions in the cluster center make faint objects line_2: impossible to observe from the ground, and indeed difficult to line_3: observe with HST prior to the refurbishment mission. ! question: 5 section: 1 line_1: none ! question: 6 section: 1 line_1: none ! ! question: 8 section: 1 line_1: For scheduling purposes it is worth noting that the coordinates line_2: of the NGC 6752 observation are the same as one of the fields line_3: requested for WFPC2 observations in proposal Z379 "Search for line_4: Main Sequence Binaries in the Globular Cluster NGC 6752" line_5: PI=Bailyn. ! question: 9 section: 1 line_1: Previous successful HST proposals include the following: line_2: GO-2555 "Cataclysmic Variables and Millisecond Pulsars in Globular line_3: Cluster Cusps", PI Grindlay; line_5: GO-2237 "HST Observations of the Eclipsing Millisecond Pulsar line_6: 1957+20", PI Bookbinder line_8: GO-3851 "Deep Search for CVs and Compact Binaries in the line_9: Collapsed Close Globular NGC 6397", PI Grindlay line_11: GO-4751 "Spectroscopic Identification of Candidate Optical Counterparts line_12: of X-ray Sources in the Nearby Collapsed Globular Cluster NGC 6397", line_13: PI Grindlay line_15: GO-4425 "Search for Optical Counterparts of X-ray Sources in Nearby line_16: Clusters", PI Bailyn line_18: AR-3793 "Comparison of HST Data on Globular Clusters with Other line_19: Data Sets", PI Bailyn line_21: AR/DD-4915 "Synergistic Ground and Space Based Observations of line_22: Globular Cluster Cores", PI Bailyn ! question: 10 section: 1 line_1: The Yale, Indiana and CfA astronomy programs each support a network line_2: of scientific workstations which will be used to reduce the data. line_3: The PI and Co-I's time is paid for by their respective institutions line_4: and by other grant sources, and is therefore not charged to this line_5: grant. The funding requested will support 1/2 year of a graduate line_6: student at Yale, and 1 summer of a graduate student at Indiana. ! !end of general form text general_form_address: lname: Bailyn fname: Charles mi: D category: PI addr_1: Dept. of Astronomy addr_2: Yale University addr_3: P.O. Box 6666 city: New Haven state: CT zip: 06511 country: USA phone: (203) 432 3022 telex: bailyn@binary.astro.yale.edu ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC6752 descr_1: C, 201 pos_1: RA= 19H10M51.8S +/- 0.1S, pos_2: DEC=-59D58'55" +/- 1" equinox: 2000 comment_1: THIS TARGET HAS THE SAME COORDINATE comment_2: AS THE FIRST TARGET IN THE PROPOSAL comment_3: Z379, "SEARCH FOR MAIN SEQUENCE comment_4: BINARIES...", PI BAILYN fluxnum_1: 1 fluxval_1: V=19.5 ! targnum: 2 name_1: NGC6656 name_2: M22 descr_1: C, 201 pos_1: RA= 18H36M24.2S +/- 0.1", pos_2: DEC=-23D54'12" +/- 1" equinox: 2000 fluxnum_1: 1 fluxval_1: V=19.5 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F439W num_exp: 1 time_per_exp: 70S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO req_1: CYCLE 4 / 1-16 comment_1: PLEASE IGNORE S/N REQUIREMENTS comment_2: EXPOSURE TIMES ESTIMATED FROM comment_3: PREVIOUS HST IMAGES. ! linenum: 2.100 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F439W num_exp: 1 time_per_exp: 700S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO req_1: SAME POS FOR 2.1-6.5 AS 1 ! linenum: 2.200 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F439W num_exp: 1 time_per_exp: 700S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 3.000 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F675W num_exp: 1 time_per_exp: 18S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 4.000 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F675W num_exp: 2 time_per_exp: 180S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 5.000 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 1 time_per_exp: 120S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 6.100 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 1 time_per_exp: 1200S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 6.200 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 1 time_per_exp: 1200S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 6.300 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 1 time_per_exp: 1200S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 6.400 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 1 time_per_exp: 1200S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 6.500 targname: NGC6752 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 1 time_per_exp: 1200S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 11.000 targname: NGC6656 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F439W num_exp: 1 time_per_exp: 40S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 12.000 targname: NGC6656 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F439W num_exp: 2 time_per_exp: 400S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO req_1: SAME POS FOR 12-16 AS 11 ! linenum: 13.000 targname: NGC6656 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F675W num_exp: 1 time_per_exp: 10S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 14.000 targname: NGC6656 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F675W num_exp: 2 time_per_exp: 100S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 15.000 targname: NGC6656 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 1 time_per_exp: 120S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! linenum: 16.000 targname: NGC6656 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F656N num_exp: 3 time_per_exp: 1100S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: CR-SPLIT=NO ! ! end of exposure logsheet ! No scan data records found