second submission -2007122312 Assigned ID: 1470 ----- Attempting Submission 1 (Mon Apr 05 14:46:46 GMT 2021) ----- HST Phase I Proposal 1470 successfully submitted. Receipt: # 1470-1 ----- Attempting Submission 2 (Thu Apr 08 19:17:42 GMT 2021) ----- HST Phase I Proposal 1470 successfully submitted. Receipt: # 1470-2 ----- Attempting Submission 3 (Thu Apr 08 19:18:04 GMT 2021) ----- This target is not used in this proposal. First submission, note the use of Blade A put visit 8 on hold Visit 8 target swapped to X Vul as per HOPR 92148 please move to schedule -1295224333 ----- Attempting Submission 1 (Fri Jul 23 17:50:40 GMT 2021) ----- ----- Attempting Submission 2 (Mon Jul 26 19:43:30 GMT 2021) ----- Your proposal could not be saved. Submission aborted. ----- Attempting Submission 3 (Tue Jan 18 19:58:59 GMT 2022) ----- Visit 8 updated, please move to schedule A 1% Calibration of the Distance Ladder from Cepheids Using High Precision Cluster Parallaxes to Reveal the Origin of the Hubble Tension Observations of Cepheids with HST show the Universe is expanding significantly faster than expected under the assumption of LCDM calibrated with measurements from the early Universe. The significance of this remarkable result has reached 4-6 sigma and passed numerous tests of robustness. Improving the measurement of the Hubble constant now can move us beyond merely detecting this discrepancy to identifying its origin. We propose to obtain HST photometry of Cepheids hosted by open clusters in the Milky Way whose large number of stars provide the highest parallax precision available in Gaia EDR3, a factor of more than three better than what is possible for individual Cepheids. To fully exploit these Cepheids to calibrate the distance ladder we propose to observe these Cluster Cepheids with spatial scanning and the same WFC3 three-band photometric system used for extragalactic Cepheids to nullify the effects of photometric zeropoint errors along the distance ladder. This program will surpass the best available calibration of the distance ladder to enable a 1% measurement of the Hubble constant and increase its leverage for identifying the source of the discrepancy. Gaia and HST, each doing what they do best, can continue to steadily advance our knowledge of what appears to be a new feature in the cosmological model Spatial scanning Adam Riess: Has been leading the SH0ES Team. Extensive experience in leading large cosmological measurements, including with HST, experience in measuring supernovae, Cepheids, parallaxes, photometry, and astrometry. Is also a member of the WFC3 Team at STScI and is very familiar with its workings, spatial scanning measurements, etc. Stefano Casertano: Deep knowledge of measurements and capabilities related to HST, Gaia parallax, photometry and astrometry. Observatory Scientist at STScI. Lucas Macri: An expert in Cepheids and measurements of Cepheids. Broad experience with telescopic observations, large data sets and the near-IR. Wenlong Yuan: An expert in Cepheids and measurements of Cepheids. Experience in ground-based measurements of Cepheid light curves. Tristan Cantat-Gaudin: Expert in the analysis of open clusters, parallaxes Louise Breuval: Experienced with measuring Cepheids, distance scale. Large Scale Structure of the Universe 6 false true false false false false false false AVAILABLE EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR CEPHEID This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F153M WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. 1640414351000 73.0 (Tic-Visit :proposal-id 16676 :visit-id "01" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:09:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. 1640231470000 76.73982013803698 (Tic-Visit :proposal-id 16676 :visit-id "02" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:00.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "02" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. 1638374676000 304.1386301332666 (Tic-Visit :proposal-id 16676 :visit-id "03" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:01.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "03" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. 1640989200000 260.50196008518867 (Tic-Visit :proposal-id 16676 :visit-id "04" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "04" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. 1642887221000 336.0 (Tic-Visit :proposal-id 16676 :visit-id "05" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:03.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "05" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16676 :visit-id "06" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:04.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "06" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. 1638889294000 294.68100885338663 (Tic-Visit :proposal-id 16676 :visit-id "07" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "07" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint HOPR repeat of visit 07. (Tic-Visit :proposal-id 16676 :visit-id "07" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "07" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. swapped target for S Nor, taken off hold (Tic-Visit :proposal-id 16676 :visit-id "08" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "08" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16676 :visit-id "09" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:08.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "09" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16676 :visit-id "10" :proposal-version -1 :trans-version "20210514" :date "26-Jul-2021 13:10:09.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 1101248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16676 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16676 :visit-id "10" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2483 :al-overhead-at-end 174 :internal-dur-at-end 669 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 1 0 Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint IR scan, Cepheid moves across field IR scan, Cepheid moves across field, reverse IR scan, Cepheid moves across field scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame scan, keep Cepheid within frame,reverse scan, keep Cepheid within frame Direct image to compare to amplitude of scan for zeropoint Direct image to compare to amplitude of scan for zeropoint