! File: 2840C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:18:00:00 coverpage: title_1: FIRST ORDER GRATING PHOTOCATHODE GRANULARITY title_2: TEST FOR HIGH S/N STABILITY sci_cat: CALIBRATION proposal_for: CAL/HRS pi_fname: RONALD pi_mi: L. pi_lname: GILLILAND pi_inst: ST SCI pi_country: USA pi_phone: (301)338-4454 keywords_1: HRS, CALIBRATION, CYCLE 1 hours_pri: 3.67 num_pri: 2 hrs: Y pi_position: GHRS INST SCI ! end of coverpage abstract: line_1: CYCLE 1 calibration of photocathode granularity for domains line_2: covered by G140L in SSA and LSA. The signal-to-noise line_3: attainable with GHRS in standard ACCUM modes will normally line_4: be limited to a few percent by uncalibrated sensitivity line_5: variations on the photocathodes. With prior calibration this line_6: limitation can be alleviated. line_7: This proposal covers only D1 for which the granularity is line_8: to be a severe limitation. line_11: A test of high S/N calibration stability is made in ECH-A line_12: at 1478 A in SSA , a region where independent line_13: GTO/OS observations will obtain high S/N (about 500) in line_14: a separate star. line_15: Region of photocathode ind. meas. for G140M ! ! end of abstract general_form_proposers: lname: GILLILAND fname: RONALD title: PI mi: L. inst: ST SCI country: USA ! lname: DUNCAN fname: DOUGLAS mi: K. inst: ST SCI country: USA ! lname: HULBERT fname: STEPHEN mi: J. inst: ST SCI country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: HD93521 line_2: for G140L will be observed over the full range of wavelength line_4: The spacing between wavelength line_5: settings in a WSCAN will be chosen such that vertical offsets line_6: of 50 microns on the photocathode will occur in order to map line_7: out both dimensions of granularity variation in a fully line_8: wavelength dependent sense. FPSPLITs will be used to line_9: determine the granularity at any wavelength setting. line_10: WSCANS on both sides will be taken with COMB=NO to calibrate line_11: diode-to-diode sensitivity. line_12: ETA UMA will be observed with Ech-A and G140M as S/N test ! question: 3 section: 2 line_1: NOTE to exposure log lines: Exposure time has the following line_2: derivation. This is exactly what we want implemented: line_4: STEP-PATT=5 => 4 bins on spectrum, repeat code=1 line_5: 2 bins on background, repeat code=8 line_6: ------ line_7: 34 integrations per pattern line_8: * 0.2 sec per integration line_9: ------ line_10: 6.8 sec per pattern line_11: * 4 patterns line_12: ------ line_13: 27.2 sec line_14: * 4 FP-SPLITS line_15: = 108.8 line_16: A single WSCAN without COMB-addition will be taken over the line_17: full wavelength range in order to define the diode-to-diode line_18: sensitivity. ! question: 5 section: 1 line_1: Exposure times reflect minimum time to complete a full line_2: ACCUM mode observation cycle with four bins and a full line_3: COMB and FP-SPLIT pattern. line_4: Multiples of basic pattern times sometimes needed for S/N. ! question: 7 section: 1 line_1: Over the FP-SPLITs the photocathode granularity will be line_2: manifested as fixed pattern noise that moves through the line_3: spectra at the SPLIT cadence. line_4: It is then possible to simultaneously solve for both line_5: the fixed pattern noise (granularity) and the stellar line_6: spectrum. ! question: 10 section: 1 line_1: Data Analysis line_2: Personnel ! !end of general form text general_form_address: lname: GILLILAND fname: RONALD mi: L category: PI inst: ST SCI addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA ! lname: DUNCAN fname: DOUGLAS mi: K. inst: ST SCI country: USA phone: 301-338-4454 ! lname: HULBERT fname: STEPHEN mi: J. inst: ST SCI country: USA phone: 301-338-8720 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD93521 name_2: GSC3009-2547 descr_1: SPECTROPHOTOMETRIC STANDARD pos_1: RA = 10H 48M 23.51S +/-0.03S, pos_2: DEC = 37D 34' 12.8" +/-0.5", pos_3: PLATE-ID=01R8 equinox: 2000 pm_or_par: Y pos_epoch_yr: 1950.00 ra_pm_val: 0.000333 ra_pm_unct: 0.000867 dec_pm_val: -0.0020 dec_pm_unct: 0.0090 fluxnum_1: 1 fluxval_1: V=7.04, TYPE=O9V fluxnum_2: 2 fluxval_2: B-V=-0.28 fluxnum_3: 3 fluxval_3: F(1300)=3.3E-10 ! targnum: 2 name_1: ETAUMA descr_1: BRIGHT UV STANDARD pos_1: RA=13H 47M 32.53S +/- 0.5S, pos_2: DEC=+49D 18' 41.7" +/- 0.3", pos_3: PLATE-ID=008S equinox: 2000 pm_or_par: Y pos_epoch_yr: 1950.00 ra_pm_val: -0.010867 ra_pm_unct: 0.000067 dec_pm_val: -0.0360 dec_pm_unct: 0.0010 comment_1: ETAUMA IS ONE OF STSCI UV comment_2: SPECTROPHOTOMETRIC STANDARDS fluxnum_1: 1 fluxval_1: V=1.86 fluxnum_2: 2 fluxval_2: B-V=-0.19 fluxnum_3: 3 fluxval_3: F-CONT(1480)=1.3E-8 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 3.000 targname: HD93521 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N1 num_exp: 1 time_per_exp: 57.8S s_to_n: 100 fluxnum_1: 1 priority: 1 param_1: MAP=END-POINT, param_2: FAINT=14000, param_3: SEARCH-SIZE=5, param_4: LOCATE=YES req_1: ONBOARD ACQ FOR 3.001; req_2: CYCLE 1/3.000-5.001; ! linenum: 3.001 targname: HD93521 config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-N1 num_exp: 1 time_per_exp: 9.2S s_to_n: 100 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 3.002-5.001; ! linenum: 3.002 targname: HD93521 config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N1 num_exp: 1 time_per_exp: 102.4S s_to_n: 100 fluxnum_1: 1 priority: 1 param_1: NX=32 param_2: NY=16 param_3: DELTA-X=2 param_4: DELTA-Y=4 ! linenum: 4.000 targname: HD93521 config: HRS opmode: WSCAN aperture: 2.0 sp_element: G140L wavelength: 1170 - 1690 num_exp: 1 time_per_exp: 1088.0 S s_to_n: 300 fluxnum_1: 2 priority: 1 param_1: STEP-PATT=5, FP-SPLIT=STD, param_2: WAVE-STEP=52 ! linenum: 4.001 targname: HD93521 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G140L wavelength: 1347 num_exp: 1 time_per_exp: 108.8 S s_to_n: 300 fluxnum_1: 2 priority: 1 param_1: STEP-PATT=5, FP-SPLIT=DSFOUR, ! linenum: 4.002 targname: HD93521 config: HRS opmode: WSCAN aperture: 2.0 sp_element: G140L wavelength: 1170 - 1690 num_exp: 1 time_per_exp: 272.0S s_to_n: 300 fluxnum_1: 1 priority: 1 param_1: STEP-PATT=5, param_2: COMB=NO, param_3: WAVE-STEP=52 ! linenum: 4.500 targname: HD93521 config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-N1 num_exp: 1 time_per_exp: 9.2S s_to_n: 100 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 4.6-5.001; comment_1: PEAKUP IN LARGE APERTURE BEFORE comment_2: OFFSET TO SMALL APERTURE. ! linenum: 4.600 targname: HD93521 config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N1 num_exp: 1 time_per_exp: 102.4S s_to_n: 100 fluxnum_1: 1 priority: 1 param_1: NX=32 param_2: NY=16 param_3: DELTA-X=2 param_4: DELTA-Y=4 ! linenum: 5.000 targname: HD93521 config: HRS opmode: WSCAN aperture: 0.25 sp_element: G140L wavelength: 1170 - 1690 num_exp: 1 time_per_exp: 1088.0 S s_to_n: 300 fluxnum_1: 2 priority: 1 param_1: STEP-PATT=5, FP-SPLIT=STD, param_2: WAVE-STEP=52 ! linenum: 5.001 targname: HD93521 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G140L wavelength: 1347 num_exp: 1 time_per_exp: 108.8 S s_to_n: 300 fluxnum_1: 2 priority: 1 param_1: STEP-PATT=5, FP-SPLIT=DSFOUR, ! linenum: 17.000 targname: ETAUMA config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A1 num_exp: 1 time_per_exp: 57.8S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: MAP=END-POINT, param_2: FAINT=1700, param_3: SEARCH-SIZE=5, param_4: LOCATE=YES req_1: ONBOARD ACQ FOR 17.001; req_2: CYCLE 1/17.000-19.000; ! linenum: 17.001 targname: ETAUMA config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-A1 num_exp: 1 time_per_exp: 9.2S s_to_n: 100 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 17.002-19.000; req_2: CYCLE 1/3-5; ! linenum: 17.002 targname: ETAUMA config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-A1 num_exp: 1 time_per_exp: 102.4S s_to_n: 100 fluxnum_1: 1 priority: 1 param_1: NX=32 param_2: NY=16 param_3: DELTA-X=2 param_4: DELTA-Y=4 ! linenum: 18.000 targname: ETAUMA config: HRS opmode: WSCAN aperture: 0.25 sp_element: ECH-A wavelength: 1474.0 - 1484.0 num_exp: 1 time_per_exp: 2176.0S s_to_n: 300 s_to_n_time: 10M fluxnum_1: 3 priority: 1 param_1: FP-SPLIT=DSFOUR param_2: STEP-PATT=7 param_3: WAVE-STEP=2.0 ! linenum: 19.000 targname: ETAUMA config: HRS opmode: WSCAN aperture: 0.25 sp_element: G140M wavelength: 1202.6 - 1259.0 num_exp: 1 time_per_exp: 652.8S s_to_n: 300 s_to_n_time: 10M fluxnum_1: 3 priority: 1 param_1: FP-SPLIT=DSFOUR param_2: STEP-PATT=5 param_3: WAVE-STEP=9.4 ! ! end of exposure logsheet ! No scan data records found