0 Assigned ID: 2592 ----- Attempting Submission 1 (Thu Sep 30 15:01:17 GMT 2021) ----- This target is not used in this proposal. This target is not used in this proposal. Added the visit (#10) of the new target, J1327. This new visit is the replacement of J2218_slitpos1 (#7) and J0950 (#9), which have no visibility. 1835291620 ----- Attempting Submission 1 (Mon Nov 29 22:16:57 GMT 2021) ----- HST Phase II Proposal 16887 successfully submitted. Receipt: # 16887-1 ----- Attempting Submission 2 (Tue Nov 30 19:53:34 GMT 2021) ----- ----- Attempting Submission 3 (Sat Feb 19 17:24:46 GMT 2022) ----- HST Phase II Proposal 16887 successfully submitted. Receipt: # 16887-3 ----- Attempting Submission 4 (Wed Feb 23 03:25:26 GMT 2022) ----- Those two targets, J0950 and J2218_slitpos1, have no visibility. VODKA-STIS: Varstrometry for Off-nucleus and Dual (sub)Kpc Active Galactic Nuclei Close dual quasars are expected to be common in the hierarchical universe. However, very few confirmed dual quasars are known at <5 kpc at 1<z<3, in stark contrast to naive theoretical expectations. We propose STIS (G750L) slit spectroscopy to systematically discover close (<5 kpc) dual or strong gravitationally lensed quasars at redshifts 1<z<3. Our sample probes a new regime at higher redshifts, higher luminosities, and smaller merger separations than previous work. This poorly explored regime is crucial for understanding the effects of mergers in triggering quasar activity at cosmic noon. Our targets are selected using a new astrometric technique: when two close-by AGN vary stochastically, their combined light centroid shifts, which is detectable by Gaia. Follow-up dual-band HST imaging of Gaia-selected targets has recently uncovered multiple-cored morphology with small angular separations of ~0.4"-0.6", subsequent to the most recent proposal deadline. The proposed STIS spectroscopy will unambiguously identify the targets as high-redshift close dual or lensed quasars and reject interlopers from chance superpositions with foreground stars/quasars. It will demonstrate the new astrometry technique and identify suitable targets for detailed JWST IFU follow ups. The program will provide a systematic pilot effort to fill the gap in our knowledge about the demographics of dual supermassive black holes on <5 kpc scales at cosmic noon. This program will perform STIS (G750L) slit spectroscopy for six double-core quasars and one quadruple-core quasar to spectrally and spatially resolve the double/multiple cores to study their physical nature. We will use the 52x0.2" slit and the G750L aperture. The slit will be placed across both cores to obtain the spectrum for both components. The separation between the two cores is typically 0.3-0.6 arcsec, and we will use the point-source mode for acquisition. The conversion between the PA of the two cores and the ORIENT parameter is: ORIENT=PA+45.35 or ORIENT=PA+225.35 according to Table 11.2 of the STIS Instrument Handbook. Each visit, except for J2218-3322, consists of 1 orbit, with one acquisition exposure followed by the science exposure, and the CCD flats. Two orbits are used for the quad-core quasar, J2218-3322, with one orbit for each slit position. Dr. Liu has expertise in HST data reduction for STIS, the prime instrument used in the proposed observations. She is an expert in dual AGN and has more than a dozen papers published in the past decade on the general topic of merging supermassive black holes; she has led four past HST observing programs with five papers published based on the HST observations. Dr. Shen is an expert in quasars and supermassive black holes; he has led six past HST observing programs and has extensive experiences in the analysis of quasar spectra that will be required to analyze and interpret the data. Dr. Zakamska is an expert in quasars; she has led multiple past HST programs and has extensive experiences in the analysis of quasar spectra. Mr. Chen's PhD thesis focuses on the study of binary and dual AGN; he works with Dr. Liu. Dr. Hwang is PI of the ongoing HST/WFC3 imaging program that just recently discovered the double-core quasars being proposed as the STIS targets. Supermassive Black Holes and Active Galaxies 3 false true false false false true false SUPPORTED GALAXY QSO QUASAR J2000 J2000 GALAXY QSO QUASAR J2000 J2000 GALAXY QSO QUASAR J2000 J2000 GALAXY QSO QUASAR J2000 J2000 GALAXY QSO QUASAR J2000 J2000 GALAXY QSO QUASAR J2000 J2000 GALAXY QSO QUASAR No visibility at fix PA. J2000 J2000 GALAXY QSO QUASAR J2000 J2000 GALAXY QSO QUASAR No visibility at fix PA. J2000 GALAXY QSO QUASAR PA = 246.6 J2000 J2000 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G750L 7751 POS-TARG DITHER 1.0 LINE false false 2 90.0 STIS-ALONG-SLIT 1 false The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /private/var/folders/93/qpcql6s14wv_89rp0l30wbj80000gn/T/OPVisit7092329422778450076.xml (Tic-Visit :proposal-id 16887 :visit-id "01" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 18:51:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2842 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /Users/ycchen/Documents/OP-cache/STIS_16887-v10.xml (Tic-Visit :proposal-id 16887 :visit-id "10" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 16:32:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "10" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2582 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /private/var/folders/93/qpcql6s14wv_89rp0l30wbj80000gn/T/OPVisit5050616767290002560.xml (Tic-Visit :proposal-id 16887 :visit-id "02" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 18:53:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "02" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2842 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /private/var/folders/93/qpcql6s14wv_89rp0l30wbj80000gn/T/OPVisit10004283888195333257.xml Visit is only schedulable when the autofill option is turned off (i.e., leaving 30s unused visibility). (Tic-Visit :proposal-id 16887 :visit-id "03" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 18:54:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "03" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2722 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /private/var/folders/93/qpcql6s14wv_89rp0l30wbj80000gn/T/OPVisit3869853076169678736.xml Had to shorten the exposure time (by ~5%) by enforcing schedulability to be >60 to get the visit schedulable. (Tic-Visit :proposal-id 16887 :visit-id "04" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 18:55:14.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "04" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2662 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3055 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /private/var/folders/93/qpcql6s14wv_89rp0l30wbj80000gn/T/OPVisit8941902404093393536.xml (Tic-Visit :proposal-id 16887 :visit-id "05" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 18:56:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "05" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2762 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /private/var/folders/93/qpcql6s14wv_89rp0l30wbj80000gn/T/OPVisit5640288267358176808.xml Had to shorten the exposure time (by ~10%) by enforcing schedulability to be >70 to get the visit schedulable. (Tic-Visit :proposal-id 16887 :visit-id "06" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 18:57:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "06" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2614 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3009 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 30.1. CASM was run in Phase II mode. /private/var/folders/93/qpcql6s14wv_89rp0l30wbj80000gn/T/OPVisit10573517636232428944.xml (Tic-Visit :proposal-id 16887 :visit-id "08" :proposal-version -1 :trans-version "20211222" :date "22-Feb-2022 18:58:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 129232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16887 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16887 :visit-id "08" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2786 :al-overhead-at-end 0 :internal-dur-at-end 640 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 1 0