! File: 3005C.PROP ! Database: PEPDB ! Date: 18-FEB-1994:09:54:30 coverpage: title_1: ISOTOPIC ABUNDANCES OF CARBON AND OXYGEN AND FRACTIONATION IN title_2: INTERSTELLAR CARBON MONOXIDE sci_cat: INTERSTELLAR MEDIUM proposal_for: SAT/OS pi_title: PROF. pi_fname: DAVID pi_mi: L. pi_lname: LAMBERT pi_inst: TEXAS, UNIVERSITY OF pi_country: USA pi_phone: 512-471-4461 keywords_1: INTERSTELLAR MOLECULES-CO. ABUNDANCES AND keywords_2: NUCLEOSYNTHESIS-ISOTOPES OF C AND O - MOLECULAR PROCESSES - FRACTIONATION hours_pri: 6.00 num_pri: 1 hrs: X time_crit: X pi_position: PROFESSOR ! end of coverpage abstract: line_1: HRS observations of the CO A-X system between 1250 and 1550 A will be acquired line_2: and analyzed to obtain abundances of 12C16O, 13C16O, 12C17O, and 12C18O, and to line_3: study the rotational excitation of the CO molecule. Additional observations of line_4: the weak inter-combination line of C II at 2324 A will provide the C+ abundance line_5: which plays an important role in chemical fractionation. line_7: Diffuse interstellar gas towards local stars (e.g. Zeta Per and Zeta Oph) will line_8: be observed for the C II lines and lines of the less abundant isotopic species line_9: of CO. A check on the Galactic gradient in the 12C/13C ratio will be attempted line_10: by observing stars about 1 kpc towards and away from the Galactic center. ! ! end of abstract general_form_proposers: lname: LAMBERT fname: DAVID mi: L. inst: TEXAS, UNIVERSITY OF country: USA ! lname: FEDERMAN fname: STEVEN mi: R. inst: JET PROPULSION LABORATORY country: USA ! lname: GILLILAND fname: RONALD mi: L. inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: High S/N HRS echelle spectra of bright slightly reddened stars at 2324 A line_2: (ECH-B) and several wavelengths between 1480 and 1230 A (ECH-A). Each exposure line_3: has been subdivided into 2 or 3 parts. Smaller intervals are assumed here in line_4: order to reduce fluctuations from photocathode granularity. Detailed procedure line_5: TBD following SV and full testing of HRS. line_10: comment continued from EL page 12, Line 38.000: additional targets may be line_11: substituted. These exposure sheets are a cumbersome way of defining real and line_12: plausible alternatives. ! question: 4 section: 1 line_1: For diffuse clouds, the ^12C/^13C ratio is just measurable from the ground via line_2: the CH^+ interstellar lines (see, in particular, Jura and BAAS, 1985). As line_3: discussed in 2., interpretation of isotopic ratios from dense clouds is line_4: confused by radiative transfer effects. The CO ultraviolet lines provide the line_5: only opportunity to measure ^12C/^13C and ^16O/^17O/^18O along several lines of line_6: sight. Copernicus and IUE lacked the necessary sensitivity. ! question: 6 section: 1 line_1: This program calls for high S/N spectra. Some observations should be scheduled line_2: in CYCLE1 to allow testing of techniques for high S/N, others to later cycles. line_3: Based on my experience with ground-based detectors, I suspect that a line_4: bright star will have to be observed in order to achieve an adequate line_5: calibration of the pixel-pixel variations: flat-fielding using a monochromatic line_6: lamp is unlikely to yield adequate accuracy. In the event that observation of line_7: a star is necessary, the observing time may be taken from that assigned to low line_8: priority stars. Note too that special techniques may be necessary to ensure line_9: high S/N: e.g., positioning the line on the optimum portion of the line_10: photocathode. It seems possible to describe their requests now. ! question: 7 section: 1 line_1: The spectra as reduced by the standard STScI software will be analyzed at UT line_2: and JPL. Synthetic CO profiles will be fitted to the observations to extract line_3: the CO column density, rotational temperature, the radial velocity, and the line_4: isotopic abundance ratios. line_5: Software developed at STScI will be used to optimally separate the stellar line_6: spectra from fixed-pattern noise. ! question: 10 section: 1 line_1: Departmental, Institute and University computing facilities will be used. ! question: 13 section: 1 line_1: HRS observations of the CO A-X system between 1250 and 1550 A will be acquired line_2: and analyzed to obtain abundances of 12C160, 13C160, 12C170, and 12C180, and to line_3: study the rotational ecitation of the CO molecule. Additional observations of line_4: the weak inter-combination line of C II at 2324 A will provide the C+ abundance line_5: which plays an important role in chemical fractionation. line_7: Diffuse interstellar gas towards local stars (e.g. Zeta Per and Zeta Oph) will line_8: be observed for the C II lines and lines of the less abundant isotopic species line_9: of CO. A check on the Galactic gradient in the 12C/13C ratio will be attempted line_10: by observing stars about 1 kpc towards and away from the Galactic center. ! !end of general form text general_form_address: lname: LAMBERT fname: DAVID mi: L. category: PI inst: TEXAS, UNIVERSITY OF ! lname: FEDERMAN fname: STEVEN mi: R. inst: JET PROPULSION LABORATORY addr_1: 4800 OAK GROVE AVENUE city: PASADENA state: CA zip: 91109 country: USA phone: 818-354-2274 telex: 910-588-3294 ! lname: GILLILAND fname: RONALD mi: L. category: CON inst: SPACE TELESCOPE SCIENCE INSTITUTE addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA phone: 301-338-4454 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD149757 name_2: ZETA-OPH descr_1: OB STAR BEHIND INTERSTELLAR CLOUD pos_1: RA = 16H 37M 09.53S +/- 0.01S, pos_2: DEC = -10D 34' 02.1" +/- 0.04", pos_3: PLATE-ID=006P equinox: 2000 pm_or_par: Y pos_epoch_bj: B pos_epoch_yr: 1950.00 ra_pm_val: 0.000800 ra_pm_unct: 0.000133 dec_pm_val: 0.0230 dec_pm_unct: 0.0010 an_prlx_val: 0.0030 an_prlx_unct: 0.0030 rv_or_z: V=-14 fluxnum_1: 1 fluxval_1: V=2.56, TYPE = 09.5 V, E(B-V)=0.32 fluxnum_2: 2 fluxval_2: F-CONT(2320)=1.2 +/- .2 E-9 fluxnum_3: 3 fluxval_3: F-CONT(1400)=4.0 +/- .4 E-9 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.100 sequence_1: DEFINE sequence_2: SNHIGH targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: # wavelength: 1.0 num_exp: 1 time_per_exp: 108.8S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 3 priority: # param_1: FP-SPLIT=STD param_2: STEP-PATT=7 req_1: POS TARG 0.5,0.0 ! linenum: 1.101 sequence_1: DEFINE sequence_2: SNHIGH targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: # wavelength: 1.0 num_exp: 1 time_per_exp: 108.8S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 3 priority: # param_1: FP-SPLIT=STD param_2: STEP-PATT=7 req_1: POS TARG -0.4,0.0 ! linenum: 1.102 sequence_1: DEFINE sequence_2: SNHIGH targname: # config: HRS opmode: ACCUM aperture: 2.0 sp_element: # wavelength: 1.0 num_exp: 1 time_per_exp: 108.8S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 3 priority: # param_1: FP-SPLIT=STD param_2: STEP-PATT=7 req_1: POS TARG 0.0,0.0 ! linenum: 2.000 targname: HD149757 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A1 num_exp: 1 time_per_exp: 144.5S s_to_n: 50 fluxnum_1: 1 priority: 1 param_1: FAINT=1500.0, param_2: SEARCH-SIZE=5, param_3: MAP=END-POINT req_1: ONBOARD ACQ FOR 5-18.502 ! linenum: 5.000 sequence_1: USE sequence_2: SNHIGH targname: HD149757 sp_element: ECH-A wavelength: X1476.6 time_per_exp: X4 priority: 1 comment_1: REGION CENTER, 1478, AT DIODE 340 ! linenum: 7.000 sequence_1: USE sequence_2: SNHIGH targname: HD149757 sp_element: ECH-A wavelength: X1419.0 time_per_exp: X7 priority: 1 ! linenum: 11.000 sequence_1: USE sequence_2: SNHIGH targname: HD149757 sp_element: ECH-A wavelength: X1283.3 time_per_exp: X4 priority: 1 req_1: CYCLE 0 / 1.100-18.502 ! linenum: 14.500 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1476.3 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 14.501 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1476.6 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 14.502 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1477.4 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 15.500 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1418.7 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 15.501 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1419.0 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 15.502 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1419.8 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 16.500 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1283.0 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 16.501 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1283.3 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 16.502 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1284.1 num_exp: 1 time_per_exp: 1088.0S s_to_n: 300 s_to_n_time: 20M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 17.500 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-A wavelength: 1476.6 num_exp: 1 time_per_exp: 108.8S s_to_n: 100 s_to_n_time: 2M priority: 1 param_1: STEP-PATT=7 ! linenum: 18.500 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 2325.4 num_exp: 1 time_per_exp: 217.6S s_to_n: 300 s_to_n_time: 10M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 18.501 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 2325.7 num_exp: 1 time_per_exp: 217.7S s_to_n: 300 s_to_n_time: 10M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! linenum: 18.502 targname: HD149757 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 2326.4 num_exp: 1 time_per_exp: 217.6S s_to_n: 300 s_to_n_time: 10M fluxnum_1: 2 priority: 1 param_1: FP-SPLIT=STD param_2: STEP-PATT=7 ! ! end of exposure logsheet ! No scan data records found