Final version -2017274866 Assigned ID: 1651 ----- Attempting Submission 1 (Mon Mar 19 20:20:24 GMT 2018) ----- HST Phase I Proposal 1651 (stisleakers.apt) successfully submitted. Receipt: # 1651-1 ----- Attempting Submission 2 (Wed Mar 21 23:28:24 GMT 2018) ----- HST Phase I Proposal 1651 (stisleakers.apt) successfully submitted. Receipt: # 1651-2 ----- Attempting Submission 3 (Thu Mar 22 00:00:06 GMT 2018) ----- HST Phase I Proposal 1651 (stisleakers.apt) successfully submitted. Receipt: # 1651-3 ----- Attempting Submission 4 (Thu Mar 22 01:24:10 GMT 2018) ----- HST Phase I Proposal 1651 (stisleakers.apt) successfully submitted. Receipt: # 1651-4 ----- Attempting Submission 5 (Thu Mar 22 02:05:55 GMT 2018) ----- HST Phase I Proposal 1651 (stisleakers.apt) successfully submitted. Receipt: # 1651-5 ----- Attempting Submission 6 (Thu Mar 22 03:34:07 GMT 2018) ----- If the target coordinates are not known to 0.4" (or better), an ACQ/SEARCH should precede the ACQ/IMAGE. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. If the target coordinates are not known to 0.4" (or better), an ACQ/SEARCH should precede the ACQ/IMAGE. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. COS FUV PSA science exposures with extended targets have special calibration limitations. See "Errors and Warnings" for more details. These distant compact dwarf galaxies are virtually point-like in SDSS imaging. All of their light will be enclosed in the PSA, and flux calibration issues are not a serious concern. All of the COS FUV G140L spectra are being obtained with each of the 4 FP positions, 1, 2, and then 3 and 4 in the last (3rd) orbits as recommended. The coordinates, from SDSS imaging, are accurate enough for an ACQ/IMAGE target acquisition. All spectroscopy has been changed to TIME-TAG mode with FLASH=YES and BUFFER=TIME=20,000 as recommended. -1720727047 ----- Attempting Submission 1 (Wed May 30 09:45:13 GMT 2018) ----- ----- Attempting Submission 3 (Tue Jul 31 17:39:01 GMT 2018) ----- HST Phase II Proposal 15471 (15471jul31.apt) successfully submitted. Receipt: # 15471-3 ----- Attempting Submission 4 (Thu Aug 02 19:07:10 GMT 2018) ----- These distant compact dwarf galaxies are virtually point-like in SDSS imaging. All of their light will be enclosed in the PSA, and flux calibration issues are not a serious concern. All of the COS FUV G140L spectra are being obtained with FP-POS=4 as recommended.The BOT indicates that both targets are SAFE. The coordinates, from SDSS imaging, are accurate enough for an ACQ/IMAGE target acquisition. We recently made a new broadband photometric search for galaxies in the SDSS DR14 having i-band excesses, due to extremely strong [OIII] emission lines (rest EW([OIII])>900Ang), at z~0.50. This identified a rapidly evolving population of "green pea" galaxies, which appear to be the likely sources of most of the ionizing photons escaping into the IGM. These spectroscopically confirmed extreme starbursts in metal-poor dwarf galaxies are the kind of 'young' galaxies which are thought to have re-ionized the universe. Their ISM is very highly ionized, and practically un-reddened. Their higher redshifts push their Lyman limits into a far more sensitive wavelength region of the HST/COS spectrograph than has been utilized on previous searches for ionizing photons leaking from lower-redshift galaxies. We propose FUV spectroscopy of two representatives of this newly studied galaxy population with very bright [OIII]. They are very compact intense starbursts (sSFR~10**-8 /year), with no trace of an AGN. Their extremely blue stellar continuum is well detected in the NUV and FUV by GALEX.Their continuum brightness at an observed wavelength of 1400Ang (just redward of the Lyman limit) guarantees us of DETECTING their escaping Lyman limit fluxes at the 3-sigma level, even if the relative ionizing escape fraction is as low as 3.7%. We will also simultaneously measure their Lyman-alpha emission line profiles, to search for outflows and/or closely spaced double peaked emission that may be correlated with Lyman continuum leakage. We will obtain FUV spectroscopy of two extreme emission-line galaxies. Their extremely high specific star formation rates, and high-ionization gas make them prime candidates for detectable 'leakage' of ionizing photons. Their high redsfhits (z~0.5) shift their continuum shortward of the Lyman limit into the sensitive region of the COS spectrograph. We will therefore observe each of the two targets spectroscopically in the same short-wavelength setting for 3 full orbits apiece. Galaxies and the IGM 0 false false false false false false false SUPPORTED GALAXY DWARF COMPACT STARBURST YES This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 GALAXY DWARF COMPACT STARBURST YES This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 COS/FUV Spectroscopic No No G140L 1280 COS/FUV Spectroscopic No No G140L 1280 /private/var/folders/q_/glfmvhmj0mq4qm_yvhs134lh0003lp/T/OPVisit5912658024900080241.xml 1533647244005 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. SDSS090334.59 (Tic-Visit :proposal-id 15471 :visit-id "01" :proposal-version -1 :trans-version "20180409" :date "07-Aug-2018 09:07:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 69792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15471 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15471 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2875 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15471 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2984 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15471 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2969 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) true 3 0 /private/var/folders/q_/glfmvhmj0mq4qm_yvhs134lh0003lp/T/OPVisit1243845334387028396.xml 1533647197293 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. [OIII] galaxy 020747.98 (Tic-Visit :proposal-id 15471 :visit-id "02" :proposal-version -1 :trans-version "20180409" :date "07-Aug-2018 09:06:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 69792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15471 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15471 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2865 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15471 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2964 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15471 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2969 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 3 0