0 Assigned ID: 405 ----- Attempting Submission 1 (Fri Apr 07 05:34:03 GMT 2017) ----- HST Phase I Proposal 405 (Tilvi_AGN_sub_v1.pdf.apt) successfully submitted. Receipt: # 405-1 ----- Attempting Submission 2 (Fri Apr 07 21:20:55 GMT 2017) ----- HST Phase I Proposal 405 (Tilvi_AGN_sub_v1.pdf.apt) successfully submitted. Receipt: # 405-2 ----- Attempting Submission 3 (Fri Apr 07 23:13:19 GMT 2017) ----- HST Phase I Proposal 405 (Tilvi_AGN_sub_v1.pdf.apt) failed submission. ----- Attempting Submission 4 (Fri Apr 07 23:13:58 GMT 2017) ----- ----- Attempting Submission 5 (Fri Apr 07 23:17:28 GMT 2017) ----- Integration time for parallel orbits now increased a little bit, using newer APT 25.4.1 -122900656 ----- Attempting Submission 1 (Thu Jul 20 21:39:01 GMT 2017) ----- ----- Attempting Submission 2 (Wed Dec 27 05:02:29 GMT 2017) ----- Confirmation of the Most Distant Quasar We propose for 8-orbit G141 grism observations to confirm the AGN nature of a z=7.51 galaxy, currently the most distant quasar candidate identified via NV line detection using deep G102 grism observations. The AGN evidence is further supported by a weak line detection in the ground-based MOSFIRE spectrum. Here we request grism observations to better understand the physical processes occurring in this unique galaxy, and confirm its AGN nature via additional lines: CIV, HeII and CIII. Detection of CIV alone will unambiguously confirm its AGN nature. Currently, WFC3 grism is the most efficient instrument for observing these lines as our recent work shows that the flux loss from ground-based slit-spectrographs is significant (>4x) compared with the grism measurements. Furthermore, the CIII line falls on to a bright atmospheric line making it nearly impossible to observe from the ground. Confirmation of the AGN nature of our target will be a tremendous achievement because this discovery implies that the black hole accretion was already in place within the first few million years after the big bang. This also means that at least some fraction of Lyman-break selected galaxies host AGNs, which can enhance the escape of ionizing radiation and thus contribute to the reionization of the intergalactic medium (IGM). Currently there are no observations of faint quasars, M(UV)>-23.2 mag, at z>7. Our proposed observations will push the discoveries to fainter limits, which consequently will start building an excellent base-sample for James Webb Space Telescope for studying the physical nature of sources responsible for reionizing the universe. This program is an 8-orbit G141 observing program to target a z=7.51 galaxy (AGN) in the GOODS-N field (GN1) of the FIGS survey (PID:13779). Observing strategy: We are splitting 8-orbits in to 4x2 orients with first 2 visits (visit 01 and visit 02) in Orient(U3)=78.5 and remaining 2 visits (visit 03 and visit 04) at Orient (U3)=9.5. The first orient is same as in FIGS, and the second orient is close to one of the other orients in FIGS. These orients were chosen because Lya line was detected in these orients in the FIGS G102 observations. Exposures: In a given orbit, we are taking one F140W image followed by four G141 dispersed images. POS TARG: We apply some offset, using which we also provide small dithers, same as applied in the FIGS program. Coordinated parallel: Wherever possible, we have added coordinated parallels (ACS imaging). Our main science program does not depend on the coordinated parallels. Galaxies and the IGM 6 false false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY QUASAR J2000 J2000 H=25.6 WFC3/IR Spectroscopic No No G141 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15187 :visit-id "01" :proposal-version -1 :trans-version "20171009" :date "26-Dec-2017 10:38:24.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 3696000 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15187 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15187 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3071 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15187 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3121 :al-overhead-at-end 0 :internal-dur-at-end 866 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15187 :visit-id "02" :proposal-version -1 :trans-version "20171009" :date "26-Dec-2017 10:38:38.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 3696000 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15187 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15187 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3071 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15187 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3121 :al-overhead-at-end 0 :internal-dur-at-end 866 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15187 :visit-id "03" :proposal-version -1 :trans-version "20171009" :date "26-Dec-2017 10:38:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 3713408 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15187 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15187 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3071 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15187 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3171 :al-overhead-at-end 0 :internal-dur-at-end 866 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15187 :visit-id "04" :proposal-version -1 :trans-version "20171009" :date "26-Dec-2017 10:38:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 3730816 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15187 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15187 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3071 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15187 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3221 :al-overhead-at-end 0 :internal-dur-at-end 866 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3471 :pcs-gap 0 ) true 2 0