! File: 4034C.PROP ! Database: PEPDB ! Date: 20-FEB-1994:04:41:17 coverpage: title_1: GRAVITATIONAL LENSES PART I sci_cat: QUASARS & AGN proposal_for: GTO/HSP longterm: 3 cont_id: 3250 pi_fname: ROBERT pi_mi: C. pi_lname: BLESS pi_inst: WISCONSIN, UNIVERSITY OF pi_country: USA pi_phone: (608)262-1715 keywords_1: GRAVITATIONAL LENSES; BLACK HOLES; HUBBLE CONSTANT hours_pri: 25.85 num_pri: 4 ! end of coverpage abstract: line_1: Photometric and polarimetric observations will be line_2: made of systems whose properties are ascribed to the line_3: effect of a gravitational lens. The similarity of line_4: the images in the previously unobserved UV region of line_5: the spectrum, both photometrically and line_6: polarimetrically, is necessary for these objects to line_7: be gravitational lens systems; any differences found line_8: will be carefully studied to determine what line_9: constraints they put on the system. Systems whose line_10: properties appear consistent with a point mass line_11: deflector (i.e., a black hole) will be monitored to line_12: determine whether photometric or polarimetric line_13: variability exists in the images. The distance to line_14: the deflecting mass in this case can be related to line_15: the path length difference between the two image line_16: paths from the imaged quasar to the observer. The line_17: path length difference can be derived directly from line_18: the time difference between the same variation line_19: occurring in each image. The parallaxes of objects line_20: at E+3 Mpc distances are of obvious importance to a ! ! end of abstract general_form_proposers: lname: VAN CITTERS fname: G. mi: W. inst: NATIONAL SCIENCE FOUNDATION country: USA ! lname: ROBINSON fname: EDWARD mi: L. inst: TEXAS, UNIVERSITY OF country: USA ! lname: WHITE fname: RICHARD mi: L. inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA ! lname: BLESS fname: ROBERT mi: C. inst: WISCONSIN, UNIVERSITY OF country: USA ! lname: ELLIOT fname: JAMES mi: L. inst: MASSACHUSETTS INSTITUTE OF TECHNOLOGY country: USA ! lname: DOLAN fname: JOSEPH mi: F. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: The operational method of determing Delta T would be line_2: to: - determine if the quasar image more distant line_3: from the deflecting mass varies photometrically or line_4: polarimetrically; - if so, detect some line_5: characteristic signature in the variation; line_6: (Timescales on the order of weeks are the optimum line_7: ones sought for the purpose of this program.) - line_8: monitor the other image until the variation with line_9: this characteristic signature is detected; then - line_10: observe the second image well enough to identify the line_11: variation as identical to the one previously line_12: observed in the first image. Note: STScI had to line_13: divide this program into two program, 1096 and line_14: 1391. ! question: 4 section: 1 line_1: (1) Observations in the UV, accessible only to ST, line_2: will effectively double the frequency range over line_3: which the similarity of the images' broad-band line_4: spectral and polarimetric properities can be line_5: examined. (2) The reliable identification of line_6: individual variations requires accurate photometry line_7: or polarimetry. The images are faint enough that the line_8: increased signal to noise available with ST/HSP over line_9: ground-based photmetry (polarimetry) may make the line_10: difference between identifying an individual line_11: variation and remaining uncertain to whether a line_12: variation seen in one image is really identical to line_13: that observed in the other. ! question: 7 section: 1 line_1: Standard data reduction procedures will be applied line_2: to both the photometric and polarimetric data. line_3: Measurements of any photmetric quantity or line_4: normalized Stokes parameter will be compared to the line_5: same quantity measured at a different time, i.e., line_6: relative and not absolute measurements will be made. line_7: An analysis will concentrate on the detection of line_8: characteristic signatures in any variability line_9: detected. The derivation of the parallax of the line_10: deflecting mass from an observed time delay is out line_11: lined in Sec. 2. above. ! question: 12 section: 1 line_1: The gravitational lens program is directly related line_2: to the third scientific objective of HSP listed in line_3: the CEI specifications: "Measurement of the time line_4: scales of fastest variablity of . . . Quasi-Stellar line_5: Objects (QSO's) to determine their characteristic line_6: dimensions", and also the fifth scientific line_7: objective, "Determination of the wavelength and time line_8: dependence of polarization in . . . QSO's active line_9: galactic nuclei, etc.". ! question: 13 section: 1 line_1: Photometric and polarimetric observations will be line_2: made of gravitational lens systems whose properties line_3: suggest that a black hole may be the deflecting line_4: mass. If the lensed quasar is variable, a line_5: characteristic signature in the variation will be line_6: sought and the delayed image monitored to determine line_7: the path length difference between images by a line_8: "time-of-flight" measurement. The parallax of the line_9: deflecting mass may then be determined. ! !end of general form text general_form_address: lname: BLESS fname: ROBERT mi: C. category: PI inst: UNIVERSITY OF WISCONSIN addr_1: SPACE ASTRONOMY LAB. addr_2: 1150 UNIVERSITY AVE. city: MADISON state: WI zip: 53706 country: USA phone: (608)262-1715 ! lname: DOLAN fname: JOSEPH mi: F. category: CON inst: NASA, GODDARD SPACE FLIGHT CENTER addr_1: CODE 681 city: GREENBELT state: MD zip: 20771 country: USA phone: (301)286-5920 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: QSO0023+171A descr_1: GRAVITATIONALLY LENSED QUASAR pos_1: RA-OFF= +0.14S +/- 0.01S, pos_2: DEC-OFF= -4.4" +/- 0.1", pos_3: FROM 2 equinox: J2000 comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: R=23.1 ! targnum: 2 name_1: QSO0023+171B descr_1: ^ pos_1: RA = 00H 25M 36.94S +/- 0.01S, pos_2: DEC = +17D 28' 04.6" +/- 0.1" equinox: J2000 comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: R=21.9 ! targnum: 3 name_1: QSO2345+007A descr_1: GRAVITATIONALLY LENSED QUASAR pos_1: RA = 23H 48M 19.6S +/- 0.1S, pos_2: DEC = +0D 57' 21" +/- 0.5" equinox: 2000 comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: V=18.8 ! targnum: 4 name_1: QSO2345+007B descr_1: GRAVITATIONALLY LENSED QUASAR pos_1: RA-OFF= -0.410S +/- 0.007S, pos_2: DEC-OFF= -3.9" +/- 0.1", pos_3: FROM 3 equinox: ^ comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: V=20.2 ! targnum: 5 name_1: KP1635+267A descr_1: GRAVITATIONALLY LENSED QUASAR pos_1: RA = 16H 37M 1.5S +/- 0.1S, pos_2: DEC = +26D 36' 4.9" +/- 1" equinox: 2000 comment_1: POSREF = AP.J.,V221,PP473,1978 fluxnum_1: 1 fluxval_1: V=18.5 ! targnum: 6 name_1: KP1635+267B descr_1: ^ pos_1: RA-OFF= -0.047S +/- 0.01S, pos_2: DEC-OFF= +3.72" +/- 0.1", pos_3: FROM 5 equinox: ^ comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: V=20.0 ! targnum: 7 name_1: KP1635+267BKG descr_1: SKY BACKGROUND LOCATION pos_1: RA-OFF= 0.0S +/- 0.01S, pos_2: DEC-OFF= -6.5" +/- 0.1", pos_3: FROM 5 equinox: ^ comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: V=22 ! targnum: 8 name_1: QSO2345+007BKG descr_1: SKY BACKGROUND LOCATION pos_1: RA-OFF= +0.0S +/- 0.01S, pos_2: DEC-OFF= -5.0" +/- 0.01", pos_3: FROM 3, equinox: ^ comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: V=22 ! targnum: 9 name_1: QSO0023+171BKG descr_1: SKY BACKGROUND LOCATION pos_1: RA-OFF = -0.35S +/- 0.01S, pos_2: DEC-OFF= -4.4" +/- 0.01", pos_3: FROM 2, equinox: ^ comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: V=22 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 0.500 sequence_1: DEFINE sequence_2: ACQP targname: # config: HSP/POL opmode: ACQ num_exp: 1 time_per_exp: 3M s_to_n: # fluxnum_1: 1 priority: # ! linenum: 5.000 sequence_1: DEFINE sequence_2: POL targname: # config: HSP/POL opmode: STAR-SKY aperture: POL0 sp_element: F277M num_exp: 1 time_per_exp: 200S s_to_n: 100 fluxnum_1: 1 priority: # param_1: # req_1: SEQ 5-11 NO GAP; ! linenum: 7.000 sequence_1: ^ targname: # config: ^ opmode: ^ aperture: POL90 sp_element: ^ num_exp: ^ time_per_exp: 200S s_to_n: 100 fluxnum_1: 1 priority: # param_1: # ! linenum: 9.000 sequence_1: ^ targname: # config: ^ opmode: ^ aperture: POL45 sp_element: ^ num_exp: ^ time_per_exp: 200S s_to_n: 100 fluxnum_1: 1 priority: # param_1: # ! linenum: 11.000 sequence_1: DEFINE sequence_2: POL targname: # config: HSP/POL opmode: STAR-SKY aperture: POL135 sp_element: F277M num_exp: 1 time_per_exp: 200S s_to_n: 100 fluxnum_1: 1 priority: # param_1: # ! linenum: 39.000 sequence_1: USE ACQP targname: QSO2345+007A time_per_exp: X2 s_to_n: 10 s_to_n_time: 0.9S priority: 1 req_1: ONBOARD ACQ FOR 41-41.5; req_2: REPEAT 39-44.5 EVERY 14D +/- 1D req_3: FOR 1 MORE TIMES; req_4: CYCLE 3 / 39-90; req_5: PCS MODE F / 39-90; ! linenum: 41.000 sequence_1: USE POL targname: ^ time_per_exp: X5 priority: ^ param_1: SAMPLE-TIME=1, param_2: SKY-SAMPLE=0.3, param_3: SPOILER-ANGLE=21, param_4: SPOILER-SPREAD=10, req_1: SEQ 39-44.5 NO GAP; comment_1: OTHER SPOILER-ANGLES ARE 34, 101, comment_2: 119, 279 AND 296. comment_3: AFTER GTO OBSERVATION BY 14D +/- 1D. ! linenum: 41.500 sequence_1: USE sequence_2: POL targname: QSO2345+007A time_per_exp: X5 priority: ^ param_1: SAMPLE-TIME=1, param_2: SKY-SAMPLE=0.3, param_3: SPOILER-ANGLE=21, param_4: SPOILER-SPREAD=10, comment_1: OTHER SPOILER-ANGLES ARE 34, 101, comment_2: 119, 279 AND 296. ! linenum: 44.000 sequence_1: USE POL targname: QSO2345+007B time_per_exp: X5 priority: 1 param_1: SAMPLE-TIME=1, param_2: SKY-SAMPLE=0.3, param_3: SPOILER-ANGLE=83, param_4: SPOILER-SPREAD=10, comment_1: OTHER SPOILER-ANGLES ARE 200, 241, comment_2: 252, 315 AND 336. ! linenum: 44.500 sequence_1: USE sequence_2: POL targname: QSO2345+007B time_per_exp: X5 priority: 1 param_1: SAMPLE-TIME=1, param_2: SKY-SAMPLE=0.3, param_3: SPOILER-ANGLE=83, param_4: SPOILER-SPREAD=10, comment_1: OTHER SPOILER-ANGLES ARE 200, 241, comment_2: 252, 315 AND 336. ! linenum: 55.000 sequence_1: USE ACQP targname: KP1635+267A time_per_exp: X2 s_to_n: 10 s_to_n_time: 0.9S priority: 3 req_1: ONBOARD ACQ FOR 57-57.005; ! linenum: 57.000 sequence_1: USE sequence_2: POL targname: KP1635+267A time_per_exp: X5 priority: 3 param_1: SPOILER-ANGLE=340.5, param_2: SPOILER-SPREAD=10, req_1: SEQ 55-57.024 NO GAP; comment_1: FIRST USE OF 57 IS 14D +/- 1D comment_2: AFTER GTO OBSERVATION. ! linenum: 57.005 sequence_1: USE sequence_2: POL targname: ^ time_per_exp: X5 priority: ^ param_1: SPOILER-ANGLE=340.5, param_2: SPOILER-SPREAD=10, ! linenum: 57.015 sequence_1: USE sequence_2: POL targname: KP1635+267B time_per_exp: X5 priority: ^ ! linenum: 57.024 sequence_1: USE sequence_2: POL targname: ^ time_per_exp: X5 priority: ^ ! linenum: 57.050 sequence_1: USE ACQP targname: KP1635+267A time_per_exp: X2 s_to_n: 10 s_to_n_time: 0.6S priority: 3 req_1: ONBOARD ACQ FOR 57.1-57.105; ! linenum: 57.100 sequence_1: USE sequence_2: POL targname: KP1635+267A time_per_exp: X5 priority: 3 param_1: SPOILER-ANGLE=340.5, param_2: SPOILER-SPREAD=10, req_1: AFTER 57 BY 14D +/- 1D; req_2: SEQ 57.050-57.124 NO GAP; ! linenum: 57.105 sequence_1: USE sequence_2: POL targname: ^ time_per_exp: X5 priority: ^ param_1: SPOILER-ANGLE=340.5, param_2: SPOILER-SPREAD=10, ! linenum: 57.115 sequence_1: USE sequence_2: POL targname: KP1635+267B time_per_exp: X5 priority: ^ ! linenum: 57.124 sequence_1: USE sequence_2: POL targname: KP1635+267B time_per_exp: X5 priority: 3 ! linenum: 90.000 targname: QSO0023+171B config: FOC/96 opmode: IMAGE aperture: 512X512 sp_element: F320W num_exp: 1 time_per_exp: 1800S priority: 1 comment_1: SEARCH FOR FAINTER LENS IMAGES. ! ! end of exposure logsheet ! No scan data records found