! File: 2750C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:11:00:11 coverpage: title_1: OTA BAFFLE REJECTION MEASUREMENT proposal_for: SV/OLT pi_fname: PIERRE pi_lname: BELY pi_inst: ST SCI pi_country: USA pi_phone: (301)338-4780 hours_pri: 3.00 num_pri: 5 wf_pc: Y time_crit: Y ! end of coverpage abstract: line_1: Test Objective: line_3: Measure the effectiveness of the HST OTA baffle system in line_4: rejecting light of nearby bright objects. Verify that the line_5: stray light tolerance (23rd magnitude/square arcsec at the line_6: focal plane) is met with the present viewing limits line_7: established for the sun (>50 degrees), moon (>15 degrees) line_8: and the bright earth limb (>80 degrees) from the line_9: OTA axis. ! ! end of abstract general_form_proposers: lname: BELY fname: PIERRE inst: ST SCI country: USA esa: Y ! lname: LUPIE fname: OLIVIA inst: ST SCI country: USA ! lname: STOCKMAN fname: PETER inst: ST SCI country: USA esa: Y ! lname: JAYROE fname: ROBERT inst: MSFC country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: ****Test Description: line_3: In order to realize the full potential of HST for the line_4: detection of faint astronomical sources, stray light must be line_5: negligible. Extensive study and modelling resulted in the line_6: state of the art baffling system on HST. Testing the effectiveness line_7: of the system is not practical on the ground prior to launch. This line_8: test will measure the overall effectiveness of the off-axis line_9: rejection capability of bright sources at large angles line_10: while in orbit and verify the 'level-1' stray light requirement. line_12: Estimated test duration: line_13: Total exposure time= 3 hours, Total w/overhead= 5.5 hours. ! question: 3 section: 1 line_1: Use WFC in 2x2 SUM mode as an area photometer to measure the line_2: scattered light background in several filters and at several line_3: distances from the full moon and at 50 degrees from the sun line_4: but 3 different roll orientations. line_5: 1) OFFSETS FROM THE FULL MOON: A series of exposures in combinations of line_6: filters VUV,U,V,and R filters at each of four offset line_7: pointings: 4,8,20, and 30 degrees. line_8: 2) OFFSETS FROM NEW MOON (two weeks later): at SAME POINTING as (1), line_9: repeat the 20 and 30 degree exposures for background subtraction. line_10: No background exposures are needed for the line_11: 4 and 8 degree offsets because of the brightness of the stray light. line_12: 3) OFFSET FROM THE SUN - A single pointing but at three different line_13: roll angles in each of the filters VUV,U,V,R. The pointing line_14: is to be 50 degrees from the sun and at the same time 90 degrees line_15: from the moon and 95 from the bright earth limb. ! question: 3 section: 2 line_1: WFC CCDs must be preflashed before all low light-level exposures. line_2: WPC UV flooding is required prior to the start of the test but line_3: not during any portion of the test. The quantum efficiency line_4: during this test should be worse than 90% that at the time of the line_5: flood. Purges are included for those frames with t_exp => 1000S line_6: for possible over-exposure by spurious stars. Special line_7: Requirement SEQ NO GAP is used for those groups of exposures line_8: containing a purge to insure the purge line_9: occurs at end of sequence; otherwise 'GROUP' is acceptable. ! question: 3 section: 3 line_1: *****TEST STEPS - Easy to Read summary of Exposures: line_2: WFPC Configuration: IMAGE,ALL,2x2 SUM Mode. line_4: ***SEQUENCE 1 - OFFSETS FROM FULL MOON ***** line_6: Exp line 10: Preflash, 4 deg, VUV F284W, exp time 200s. line_7: Exp line 11: 4 deg, UV F336W, exp time 140s. line_8: Exp line 12: 4 deg, V F569W, exp time 10s. line_9: Exp line 13: 4 deg, R F675W, exp time 10s. line_10: Exp line 20: Preflash, 8 deg, VUV F284W, exp time 400s. line_11: Exp line 21: 8 deg, UV F336W, exp time 100s. line_12: Exp line 22: 8 deg, V F569W, exp time 60s. line_13: Exp line 23: 8 deg, R F675W, exp time 30s. line_15: Exp line 30: Preflash, 20 deg, R F675W, exp time 200s. line_16: Exp line 31: Preflash, 20 deg, V F569W, exp time 400s. line_17: Exp line 32: Preflash, 20 deg, UV F336W, exp time 1000s, Purge. line_18: Exp line 40: Preflash, 30 deg, V F569W, exp time 1600s, Purge. ! question: 3 section: 4 line_1: SEQUENCE 2 NEW MOON BACKGROUNDS line_3: Exp line 50: Preflash, 20 deg, R F675W, exp time 200s. line_4: Exp line 51: Preflash, 20 deg, V F569W, exp time 400s. line_5: Exp line 52: Preflash, 20 deg, UV F336W, exp time 1000s,purge. line_6: Exp line 60: Preflash, 30 deg, V F569W, exp time 1600s,purge. line_7: SEQUENCE 3 OFFSET FROM SUN line_9: POINTING 50 DEGREES FROM SUN line_11: Exp line 70: Preflash, Nominal roll, VUV F284W, exp time 350s line_12: Exp line 71: Preflash, Nominal roll, UV F336W, exp time 200s line_13: Exp line 72: Nominal roll, V F569W, exp time 230s line_14: Exp line 73: Nominal roll, R F675W, exp time 100s ! question: 4 section: 1 line_1: Submitted as an Observatory Level Test ! question: 5 section: 1 line_1: SCHEDULING REQUIREMENTS: line_3: 1 - GYRO Tracking. line_4: 2 - Off nominal roll orientations required for lines 80-93. line_5: - Verification of HST off-nominal roll pointing. If off-nominal line_6: roll untested or not operational, delete only those effected line_7: portions of the test. line_8: 3 - UV FLOOD Required prior to test; WFC quantum efficiency 90% that line_9: at time of UV flood. line_10: 4 - Because of long exposures, schedule test after TEC turn-on. line_11: 5 - Exp Lines 10-40 require Full Moon (+/- 0.4 days) line_12: 6 - Exp Lines 50-60 require New Moon (+/- 1.0 days). Perform line_13: within two weeks of lines 10-40. line_14: 7 - Exp Lines 70-73 require pointing of 50 degrees from Sun, line_15: 95 deg from nearest bright earth point, and 90 deg from the moon. line_16: 8 - Order of Sequences 1 and 2 may be interchanged to line_17: accommodate lunar phase requirements. line_18: 9 - No observations during SAA passage. line_19: 10 - FGS to WFPC not required; lambda/8 acceptable. ! question: 6 section: 1 line_1: Test Repetition: none. ! question: 7 section: 1 line_1: Real Time Data Analysis Requirements: line_2: Not anticipated at this time. line_3: Offline Data Analysis Plans: line_4: Dedicated STSDAS programs to determine the incident line_5: flux attenuation factors as a function of the line_6: off-axis angle and wavelength. Description of line_7: procedures are available in internal STScI documentation. ! question: 8 section: 1 line_1: ***SIGNIFICANT AMOUNTS OF STRAY LIGHT IN FOCAL PLANE line_2: DURING THIS OLT.**** line_3: ***Possible saturation by background stars**** ! !end of general form text general_form_address: lname: LUPIE fname: OLIVIA category: CON inst: ST SCI addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA ! lname: PIERRE fname: BELY category: PI inst: ST SCI addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA ! ! end of general_form_address records ! No fixed target records found solar_system_targets: targnum: 1 name_1: MOON-04 descr_1: OFFSET TARGET 4 DEGREES descr_2: FROM MOON, NORTH. lev1_1: STD=EARTH lev2_1: STD=MOON lev3_1: TYPE = POS_ANGLE, lev3_2: RAD = 14400.0, lev3_3: ANG = 0.0, lev3_4: REF = NORTH comment_1: PHASE 0.0+/-0.01 fluxnum_1: 1 fluxval_1: SURF-CONT-BKG(5600)=74+/-10 E-17 ! targnum: 2 name_1: MOON-08 descr_1: OFFSET TARGET 8 DEGREES descr_2: FROM MOON, NORTH. lev1_1: STD=EARTH lev2_1: STD=MOON lev3_1: TYPE=POS_ANGLE, lev3_2: RAD = 28800.0, lev3_3: ANG = 0.0, lev3_4: REF = NORTH comment_1: PHASE 0.0+/-0.01 fluxnum_1: 1 fluxval_1: SURF-CONT-BKG(5600)=74+/-10 E-18 ! targnum: 3 name_1: MOON-20 descr_1: OFFSET TARGET 20 DEGREES descr_2: FROM MOON, NORTH. lev1_1: STD=EARTH lev2_1: STD=MOON lev3_1: TYPE=POS_ANGLE, lev3_2: RAD = 72000.0, lev3_3: ANG = 0.0, lev3_4: REF = NORTH comment_1: PHASE 0.0+/-0.01 fluxnum_1: 1 fluxval_1: SURF-CONT-BKG(5600)=74+/-10E-20 ! targnum: 4 name_1: MOON-30 descr_1: OFFSET TARGET 30 DEGREES descr_2: FROM MOON, NORTH. lev1_1: STD=EARTH lev2_1: STD=MOON lev3_1: TYPE=POS_ANGLE, lev3_2: RAD = 108000.0, lev3_3: ANG = 0.0, lev3_4: REF = NORTH comment_1: PHASE 0.0+/-0.01 fluxnum_1: 1 fluxval_1: SURF-CONT-BKG(5600)=74+/-10E-23 ! targnum: 5 name_1: SUN-50 descr_1: OFFSET TARGET 50 DEGREES descr_2: FROM SUN, NORTH. lev1_1: STD=SUN lev2_1: TYPE=POS_ANGLE, lev2_2: RAD = 180000.0, lev2_3: ANG = 0.0, lev2_4: REF = NORTH comment_1: TARGET MUST BE 90 DEGREES comment_2: FROM MOON AND 95 DEGREES comment_3: FROM NEAREST BRIGHT EARTH POINT. fluxnum_1: 1 fluxval_1: SURF-CONT-BKG(5600)=89+/-10E-18 ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE VUV targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F284W num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: SUM=2X2 ! linenum: 2.000 sequence_1: DEFINE UV targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F336W num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: SUM=2X2 ! linenum: 3.000 sequence_1: DEFINE V targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F569W num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: SUM=2X2 ! linenum: 4.000 sequence_1: DEFINE R targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F675W num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: SUM=2X2 ! linenum: 5.000 sequence_1: DEFINE sequence_2: VUV-PF targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F284W num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: SUM=2X2, param_2: PRE-FLASH=YES ! linenum: 6.000 sequence_1: DEFINE sequence_2: UV-PF targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F336W num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: # ! linenum: 7.000 sequence_1: DEFINE sequence_2: V-PF targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F569W wavelength: ^ num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: # ! linenum: 8.000 sequence_1: DEFINE sequence_2: R-PF targname: # config: WFC opmode: IMAGE aperture: ALL sp_element: F675W wavelength: ^ num_exp: 1 time_per_exp: 1S fluxnum_1: 1 priority: 1 param_1: SUM=2X2, param_2: PRE-FLASH=YES req_1: ^ ! linenum: 10.000 sequence_1: USE sequence_2: VUV-PF targname: MOON-04 time_per_exp: X200 req_1: GROUP 10-60 WITHIN req_2: 16D; CYCLE 0 /10-73; req_3: GROUP 10-13 NO GAP; req_4: PHASE 0.00 +/- 0.01; req_5: PERIOD 29.530589D req_6: +/- 0.000001D; req_7: ZERO-PHASE JD2446691.50 req_8: +/- 0.01D; ! linenum: 11.000 sequence_1: USE sequence_2: UV targname: MOON-04 time_per_exp: X140 req_1: PHASE 0.00 +/- 0.01 req_2: OF REF 10 ! linenum: 12.000 sequence_1: USE sequence_2: V targname: ^ time_per_exp: X10 req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 13.000 sequence_1: USE sequence_2: R targname: ^ time_per_exp: X10 req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 20.000 sequence_1: USE sequence_2: VUV-PF targname: MOON-08 time_per_exp: X400 req_1: GROUP 20-23 NO GAP; req_2: PHASE 0.00+/-0.01 req_3: OF REF 10 ! linenum: 21.000 sequence_1: USE sequence_2: UV targname: ^ time_per_exp: X100 req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 22.000 sequence_1: USE sequence_2: V targname: ^ time_per_exp: X60 req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 23.000 sequence_1: USE sequence_2: R targname: ^ time_per_exp: X30 req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 30.000 sequence_1: USE sequence_2: R-PF targname: ^ time_per_exp: X200 req_1: SEQ 30-40 NO GAP; req_2: PHASE 0.00+/-0.01 req_3: OF REF 10 ! linenum: 31.000 sequence_1: USE sequence_2: V-PF targname: ^ time_per_exp: X400 param_1: SUM=2X2,PRE-FLASH=YES, req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 32.000 sequence_1: USE sequence_2: UV-PF targname: MOON-20 time_per_exp: X1000 param_1: SUM=2X2,PRE-FLASH=YES, param_2: PURGE=YES req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 40.000 sequence_1: USE sequence_2: V-PF targname: MOON-30 time_per_exp: X1260 param_1: SUM=2X2,PRE-FLASH=YES, param_2: PURGE=YES req_1: PHASE 0.00+/-0.01 req_2: OF REF 10 ! linenum: 50.000 sequence_1: USE sequence_2: R-PF targname: ^ time_per_exp: X200 req_1: SEQ 50-60 NO GAP; req_2: PHASE 0.50+/-0.25 req_3: OF REF 10; SAME POS req_4: FOR 50 AS 30 comment_1: BACKGROUND OFFSET FROM NEW MOON ! linenum: 51.000 sequence_1: USE sequence_2: V-PF targname: ^ time_per_exp: X400 param_1: SUM=2X2,PRE-FLASH=YES req_1: PHASE 0.50+/-0.25 req_2: OF REF 10; SAME POS req_3: FOR 51 AS 31 comment_1: BACKGROUND OFFSET FROM NEW MOON ! linenum: 52.000 sequence_1: USE sequence_2: UV-PF targname: MOON-20 time_per_exp: X1000 param_1: SUM=2X2,PRE-FLASH=YES, param_2: PURGE=YES req_2: PHASE 0.50+/-0.25 req_3: OF REF 10; SAME POS req_4: FOR 52 AS 32 comment_1: BACKGROUND OFFSET FROM NEW MOON ! linenum: 60.000 sequence_1: USE sequence_2: V-PF targname: MOON-30 time_per_exp: X1260 param_1: SUM=2X2,PRE-FLASH=YES, param_2: PURGE=YES req_1: PHASE 0.50+/-0.25 req_2: OF REF 10; SAME POS req_3: FOR 60 AS 40 comment_1: BACKGROUND OFFSET FROM NEW MOON ! linenum: 70.000 sequence_1: USE sequence_2: VUV-PF targname: SUN-50 time_per_exp: X350 req_1: GROUP 70-73 NO GAP; comment_1: HST AT NOMINAL ROLL; comment_2: SEE GF QUEST 5 comment_3: FOR SCHEDULING CONSTRAINTS. comment_4: ARGET MUST BE 95 DEGREES FROM comment_5: NEAREST BRIGHT EARTH LIMB (NOT IMPLE- comment_6: MENTED IN MOSS WINDOW) ! linenum: 71.000 sequence_1: USE sequence_2: UV-PF targname: ^ time_per_exp: X200 param_1: SUM=2X2,PRE-FLASH=YES comment_1: HST AT NOMINAL ROLL; comment_2: SEE GF QUEST 5 comment_3: FOR SCHEDULING CONSTRAINTS. comment_4: ARGET MUST BE 95 DEGREES FROM comment_5: NEAREST BRIGHT EARTH LIMB (NOT IMPLE- comment_6: MENTED IN MOSS WINDOW) ! linenum: 72.000 sequence_1: USE sequence_2: V targname: ^ time_per_exp: X230 comment_1: HST AT NOMINAL ROLL; comment_2: SEE GF QUEST 5 comment_3: FOR SCHEDULING CONSTRAINTS. comment_4: ARGET MUST BE 95 DEGREES FROM comment_5: NEAREST BRIGHT EARTH LIMB (NOT IMPLE- comment_6: MENTED IN MOSSS WINDOW) ! linenum: 73.000 sequence_1: USE sequence_2: R targname: ^ time_per_exp: X100 comment_1: HST AT NOMINAL ROLL; comment_2: SEE GF QUEST 5 comment_3: FOR SCHEDULING CONSTRAINTS. comment_4: ARGET MUST BE 95 DEGREES FROM comment_5: NEAREST BRIGHT EARTH LIMB (NOT IMPLE- comment_6: PLEMENTED IN MOSS WINDOW) ! ! end of exposure logsheet ! No scan data records found