! $Id: 5506,v 4.1 1994/07/27 18:44:40 pepsa Exp $ coverpage: title_1: THE DEUTERIUM ABUNDANCE IN MODERATE REDSHIFT QSO SYSTEMS sci_cat: QUASARS & AGN sci_subcat: QUASAR ABSORPTION proposal_for: GO pi_fname: JOHN pi_lname: WEBB pi_inst: 5436 pi_country: FRANCE pi_phone: 33-1-43-20 14 25 hours_pri: 19.94 num_pri: 1 hrs: Y off_fname: ALAIN off_lname: OMONT off_title: DIRECTOR off_inst: 5436 off_addr_1: 98 BIS BVD ARAGO off_city: PARIS off_zip: 75014 off_country: FRANCE off_phone: 33-1-43-20 14 25 ! end of coverpage abstract: line_1: Observations of the light element abundances play a fundamental role line_2: in our undertanding of the standard homogenous big bang model. line_3: Of all the light elements, deuterium is of particular importance as the line_4: predicted abundance depends most sensitively on the universal density line_5: parameter. Since deuterium is readlily destroyed in stellar cycles, line_6: but manufactured only in the big bang, any deuterium detected is line_7: generally interpreted as being of primordial origin. line_8: Whilst important progress has been made with Galactic observations, line_9: extragalactic observations of highly redshifted QSO absorption systems line_10: are imperative as the offer the chance of measuring D/H in gaseous line_11: systems at a much earlier epoch with a range of metal abundances. line_12: These have been attempted, but so far no successful measurements have line_13: been made, partly due to difficulties associated with making the line_14: measurement at high redshift. For the first time we now have the line_15: possibility of measuring D/H moderate redshift (z=0.5 - 1) QSO line_16: absorption systems using GHRS on HST. We have selected 1 bright QSO line_17: with a foreground absorber which is an excellent candidate for line_18: making this fundamental measurement. ! ! end of abstract general_form_proposers: lname: WEBB fname: JOHN inst: 5436 country: FRANCE esa: Y ! lname: BERGERON fname: JACQUELINE inst: 5436 country: FRANCE esa: Y ! lname: CARSWELL fname: BOB inst: 8014 country: ENGLAND esa: Y ! lname: FERLET fname: ROGER inst: 5436 country: FRANCE esa: Y ! lname: LEMOINE fname: MARTIN inst: 5436 country: FRANCE esa: Y ! lname: VIDAL-MADJAR fname: ALFRED inst: 5436 country: FRANCE esa: Y ! lname: BOWEN fname: DAVID inst: STSCI country: USA esa: N ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Quasar 0454-220 has V=16 and may need to be ACQuired in dark time. 9 sec line_2: exposure time with a SEARCH-SIZE=3 is adopted from previous observations, and line_3: should be adequate for a post-COSTAR ACQ. We have asked for three grating line_4: positions, two of which use the G160M, the other the G200M. Individual line_5: wavelength positions are calculated to cover several lines of interest, line_6: assuming that a grating will cover a minimum of 33A or more. ACCUM exposures line_7: have COMB and FP-SPLIT chosen to optimize the quality of the data for a faint line_8: target. STEP-PATT is chosen to obtain 2 pixels/diode, again because the count line_9: rate will be low. Exposure times are set at 20 mins, which for FP-SPLIT of 4 line_10: gives 5 mins individual exposures, as suggested in the GHRS handbook. line_12: Each exposure is preceded by a WAVE calibration, since the line_13: wavelength positions of lines relative to each other is very important. This line_14: means SEQ 1.1-1.2, 2.1-2.2 and 3.1-3.2 should be NO GAP. ! question: 3 section: 2 line_1: ! question: 4 section: 1 line_1: ! question: 5 section: 1 line_1: Previous GHRS observations of 16th mag QSOs have been executed with line_2: ACQ in dark time. We ask that this QSO also be acquired in dark line_3: time unless it becomes clear that COSTAR changes ACQs significantly. ! question: 6 section: 1 line_1: An important part of the data analysis will to be fit all three line_2: lines simultaneously. Since all three lines are observed serparately line_3: it is important to provide as accurate a wavelength calibration line_4: as possible. We therefore request that WAVEs be taken before each line_5: observation. ! ! question: 8 section: 1 line_1: ! question: 9 section: 1 line_1: ! question: 10 section: 1 line_1: ! !end of general form text general_form_address: lname: WEBB fname: John category: PI inst: 5436 addr_1: Institut d'Astrophysique addr_2: 98 bis Boulevard Arago city: Paris zip: 75014 country: FRANCE phone: 33-1-43-20 14 25 telex: 205671 IAUF, E-mail webb@iap.fr ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: 0454-220 descr_1: E, 313 pos_1: RA = 04H 56M 08.90S +/- 0.5", pos_2: DEC = -21D 59' 09.4" +/- 0.5" equinox: 2000.0 rv_or_z: Z = 0.534 fluxnum_1: 1 fluxval_1: V = 15.51 fluxnum_2: 2 fluxval_2: B-V=0.06 fluxnum_3: 3 fluxval_3: F-CONT(1400)=1.4E-14 fluxnum_4: 4 fluxval_4: F-CONT(1800)=1.2E-14 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: 0454-220 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 9S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=3, param_2: BRIGHT=RETURN req_1: CYCLE 4; req_2: ONBOARD ACQ FOR 1.1-1.2; req_3: DARK TIME; comment_1: QSO HAS V=16, comment_2: SO ACQ IN DARKTIME NEEDED? ! linenum: 1.100 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G160M wavelength: 1397 num_exp: 1 time_per_exp: DEF priority: 1 param_1: COMB=FOUR, param_2: STEP-PATT=4, param_3: DOPPLER=DEF req_1: CYCLE 4; req_2: CALIB FOR 1.2; req_3: SEQ 1.1-1.2 NO GAP; comment_1: WAVE FOR LY DELTA.... ! linenum: 1.200 targname: 0454-220 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1397 num_exp: 17 time_per_exp: 20M s_to_n: 5.6 fluxnum_1: 3 priority: 1 param_1: COMB=FOUR, param_2: FP-SPLIT=STD, param_3: STEP-PATT=4, param_4: DOPPLER=DEF req_1: CYCLE 4; comment_1: ...LY DELTA AT 1400, 1408A ! linenum: 2.000 targname: 0454-220 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 9S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=3, param_2: BRIGHT=RETURN req_1: CYCLE 4; req_2: ONBOARD ACQ FOR 2.1-2.2; req_3: DARK TIME; comment_1: QSO HAS V=16, comment_2: SO ACQ IN DARKTIME NEEDED? ! linenum: 2.100 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G160M wavelength: 1445 num_exp: 1 time_per_exp: DEF priority: 1 param_1: COMB=FOUR, param_2: STEP-PATT=4, param_3: DOPPLER=DEF req_1: CYCLE 4; req_2: CALIB FOR 2.2; req_3: SEQ 2.1-2.2 NO GAP; comment_1: WAVE FOR LY GAMMA.... ! linenum: 2.200 targname: 0454-220 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1445 num_exp: 16 time_per_exp: 20M s_to_n: 5.4 fluxnum_1: 3 priority: 1 param_1: COMB=FOUR, param_2: FP-SPLIT=STD, param_3: STEP-PATT=4, param_4: DOPPLER=DEF req_1: CYCLE 4; comment_1: ...LY GAMMA AT 1434, 1442A ! linenum: 3.000 targname: 0454-220 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 9S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=3, param_2: BRIGHT=RETURN req_1: CYCLE 4; req_2: ONBOARD ACQ FOR 3.1-3.2; req_3: DARK TIME; comment_1: QSO HAS V=16, comment_2: SO ACQ IN DARKTIME NEEDED? ! linenum: 3.100 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G200M wavelength: 1766 num_exp: 1 time_per_exp: DEF priority: 1 param_1: COMB=FOUR, param_2: STEP-PATT=4, param_3: DOPPLER=DEF req_1: CYCLE 4; req_2: CALIB FOR 3.2; req_3: SEQ 3.1-3.2 NO GAP; comment_1: WAVE FOR SIII... ! linenum: 3.200 targname: 0454-220 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G200M wavelength: 1766 num_exp: 16 time_per_exp: 20M s_to_n: 6.5 fluxnum_1: 4 priority: 1 param_1: COMB=FOUR, param_2: FP-SPLIT=STD, param_3: STEP-PATT=4, param_4: DOPPLER=DEF, req_1: CYCLE 4; comment_1: ...SIII AT 1760A ! ! end of exposure logsheet ! No scan data records found