! File: 3372C.PROP ! Database: PEPDB ! Date: 19-FEB-1994:05:21:29 coverpage: title_1: GHRS POINT SPREAD FUNCTION DETERMINATION proposal_for: CAL/HRS pi_fname: RONALD pi_mi: L. pi_lname: GILLILAND pi_inst: SPACE TELESCOPE SCIENCE INSTITUTE pi_country: USA pi_phone: 301-338-4454 keywords_1: CALIBRATION keywords_2: SPECTROSCOPY, UV hours_pri: 7.70 num_pri: 1 ! end of coverpage abstract: line_1: Knowledge of the point-spread-function (PSF) for large (LSA) aperture GHRS line_2: is essential for any quantitative analysis of spectra taken through the line_3: LSA. With the determination that the GHRS has better far UV response than line_4: the FOS, coupled with simulations showing that the LSA is superior to the line_5: SSA for detection of weak, unresolved features, the need for good PSFs has line_6: increased in importance. This is independent of any deconvolution issues. line_7: Deconvolution, which may in some cases be a useful procedure to apply to line_8: LSA spectra, also requires knowledge of the PSF. Good SSA PSFs can be line_9: derived using calibration lamp spectra and simple modelling. Unfortunately, line_10: GHRS LSA maps have not proven sufficient to derive point-spread-functions line_11: (only N1 picks off the full beam). The SAO observations of CHI LUPI were line_12: justified as a test of GHRS resolving power, LSA degradation and deconvolution line_13: testing. Analysis of this data, coupled with many simulations, has shown line_14: that the best approach to deriving the relative PSF difference between the line_15: LSA and SSA is by direct least-squares solution for the PSF relating spectra line_16: acquired through the two apertures. With a vsini < 1.2 km/sec, CHI LUPI is line_17: an ideal target to define PSFs over the full range of spectral elements. ! ! end of abstract general_form_proposers: lname: GILLILAND fname: RON inst: ST SCI country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Knowledge of the point-spread-function (PSF) for large (LSA) aperture GHRS line_2: is essential for any quantitative analysis of spectra taken through the line_3: LSA. With the determination that the GHRS has better far UV response than line_4: the FOS, coupled with simulations showing that the LSA is superior to the line_5: SSA for detection of weak, unresolved features, the need for good PSFs has line_6: increased in importance. This is independent of any deconvolution issues. line_10: will be obtained in the echelle and gratings. ! question: 5 section: 1 line_1: Exposure times are selected to yield S/N about 100 for LSA, line_2: and 70, or greater, for SSA. These are levels required for line_3: adequate extraction of the relative PSF relating the two line_4: apertures. line_6: To achieve the best SSA throughput for these observations, they should line_7: be scheduled at least 6 weeks after completion CAL/HRS 3999. ! question: 7 section: 1 line_1: line_4: Data will be analysed at the ST ScI using fully developed and line_5: tested software. (See abstract for brief discussion.) ! question: 13 section: 1 line_1: line_3: High signal-to-noise spectra will be obtained through both GHRS line_4: apertures at three basic wavelengths chosen to: 1) well span the line_5: full UV wavelength range accessible to the GHRS, and 2) provide line_6: scientifically valuable spectra. ! !end of general form text general_form_address: lname: GILLILAND fname: RONALD mi: L. category: PI inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA phone: 301-338-4454 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD141556 name_2: CHI-LUP descr_1: J,704 pos_1: RA=15H 47M 46.468S +/- 0.2", pos_2: DEC=-33D 28' 35.36" +/- 0.2" equinox: 1950 pm_or_par: Y pos_epoch_yr: 1950.00 ra_pm_val: -0.000600 ra_pm_unct: 0.000667 dec_pm_val: -0.0320 dec_pm_unct: 0.0100 rv_or_z: V=+5 comment_1: BP HG MN STAR fluxnum_1: 1 fluxval_1: V=3.95+/-.05, TYPE=BP fluxnum_2: 2 fluxval_2: F-CONT(1362)=1.8 E-10 fluxnum_3: 3 fluxval_3: F-CONT(1868)=1.9 E-10 fluxnum_4: 4 fluxval_4: F-CONT(2682)=1.0 E-10 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: HD141556 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 5.0S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5, param_2: FAINT=1900, req_1: ONBOARD ACQ FOR 1.001; req_2: CYCLE 1/ 1-17; ! linenum: 1.001 targname: HD141556 config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S s_to_n: 10 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 1.002-11.00; ! linenum: 1.002 targname: HD141556 config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 102.4S s_to_n: 10 fluxnum_1: 4 priority: 1 param_1: NX=32, param_2: NY=16, param_3: DELTA-X=2, param_4: DELTA-Y=4, ! linenum: 2.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B21 wavelength: 2682 num_exp: 1 time_per_exp: 326.4S s_to_n: 96 fluxnum_1: 4 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD req_1: SEQ 2-17 NO GAP comment_1: SENS=1.19E12 comment_2: S/N=SQRT(FLUX*SENS*NUM_EXP comment_3: *TIME_PER_EXP*0.94/4) ! linenum: 3.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 2.0 sp_element: ECH-B30 wavelength: 1868 num_exp: 3 time_per_exp: 435.2S s_to_n: 95 fluxnum_1: 3 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD comment_1: SENS=1.56E11 ! linenum: 4.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G270M wavelength: 2688 num_exp: 1 time_per_exp: 108.8S s_to_n: 110 fluxnum_1: 4 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD comment_1: SENS=4.70E12 ! linenum: 5.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G200M wavelength: 1860 num_exp: 1 time_per_exp: 326.4S s_to_n: 113 fluxnum_1: 3 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD comment_1: SENS=8.80E11 ! linenum: 6.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1860 num_exp: 1 time_per_exp: 435.2S s_to_n: 102 fluxnum_1: 3 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD comment_1: SENS=5.40E11 ! linenum: 7.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1360.5 num_exp: 1 time_per_exp: 435.2S s_to_n: 104 fluxnum_1: 2 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD comment_1: SENS=5.82E11 ! linenum: 11.000 targname: HD141556 config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S s_to_n: 10 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 12.00-17.00 comment_1: STEP-TIME=1.6 SEC ! linenum: 12.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B21 wavelength: 2682 num_exp: 2 time_per_exp: 435.2S s_to_n: 90 fluxnum_1: 4 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD comment_1: LSA/SSA(2682)=3.0 ! linenum: 13.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B30 wavelength: 1868 num_exp: 6 time_per_exp: 435.2S s_to_n: 71 fluxnum_1: 3 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD comment_1: LSA/SSA(1868)=3.6 ! linenum: 14.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2688 num_exp: 1 time_per_exp: 217.6S s_to_n: 90 fluxnum_1: 4 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD ! linenum: 15.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G200M wavelength: 1860 num_exp: 2 time_per_exp: 435.2S s_to_n: 97 fluxnum_1: 3 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD ! linenum: 16.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G160M wavelength: 1860 num_exp: 4 time_per_exp: 435.2S s_to_n: 108 fluxnum_1: 3 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD ! linenum: 17.000 targname: HD141556 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G160M wavelength: 1360.5 num_exp: 4 time_per_exp: 435.2S s_to_n: 100 fluxnum_1: 2 priority: 1 param_1: STEP-PATT=5, param_2: FP-SPLIT=STD comment_1: LSA/SSA(1360)=4.2 ! ! end of exposure logsheet ! No scan data records found