0 Assigned ID: 59 ----- Attempting Submission 1 (Mon Apr 07 18:55:37 GMT 2014) ----- HST Phase I Proposal 59 (c3.apt) successfully submitted. ----- Attempting Submission 2 (Thu Apr 10 00:01:27 GMT 2014) ----- 0 ----- Attempting Submission 1 (Thu Jul 24 16:19:14 GMT 2014) ----- CIII] Emission in z=5.7 Galaxies: A Pathfinder for Galaxy Spectroscopy in the Reionization Era The last few years has witnessed a rapid increase in the detections of galaxies at z>7, at the end of the reionization era. However, as a result of the increasing attenuation of Ly alpha emission by the partially neutral IGM at this redshift, it is becoming clear that the traditional means of redshift confirmation is bound for limited success; this presents a major challenge to galaxy spectroscopy as we probe deeper into the reionization era with JWST and ELTs. Through our survey of reionization-era analog galaxies at z~2, we find that low metallicity, low luminosity galaxies exhibit strong CIII]1909 nebular emission lines. If, as is expected, CIII] remains strong at high redshift, the line can be used as a powerful alternative to Ly alpha in spectroscopy of reionization-era galaxies. To explore this possibility, we will carry out deep HST WFC3/IR F128N narrow-band imaging of a sample of 8 galaxies at z=5.7 in two fields. At this redshift, the CIII] line is fortuitously located within the F128N passband, allowing detection of CIII] in this sample of spectroscopically confirmed galaxies, reaching a flux limit beyond what is possible with current ground-based observations. Combining the F128N narrow-band imaging with broad-band observations, we will reliably measure the CIII] flux for the brighter objects in our sample (J<~26), and measure or strongly constrain the stacked CIII] flux for fainter objects (J~27). This program will provide the first statistical sample of CIII] emission in galaxies close to the end of reionization. Success in this venture would usher in a new era of redshift confirmation at z>7, guiding the strategy of such programs on future major facilities. we will carry out 6-orbit F128N narrowband imaging for each of our two fields, SDF1324 and SXFDF0217. We will also obtain a 2-orbit F125W broadband imaging of the SXDF0217 field, providing accurate continuum subtraction. For SDF1324, we will rotate the field with a position angle (PA)=102.4 degree to include two high-z galaxies in this field. The coordinates of the two galaxies are (13:24:16.13, +27:44:11.6) and (13:24:13.00, +27:41:45.8), which can be included into one WFC3/IR field with a rotation angle of 102.4 degree. We use the two visits to populate the 6-orbit F128N imaging. In the Visit 01, we use a four-point-dither to populate the first two orbit; and also, we use another four-point-dither to populate the 3rd and 4th orbit. In the Visit 02, we use a four-point-dither to populate the 5th and 6th orbit. For SXDF0217, we will rotate the the field with a PA=49.9 deg to include five high-z galaxies in this field. We will use two visits to populate a 8-orbit for this field. In the Visit 03, we will first obtain a 2-orbit F125W broadband imaging. We use two four-point-dither to populate each orbit of F125W imaging. Then, we obtain 2-orbit F128N narrowband imaging in this visit. We will use a four-point-dither to populate the 2-orbit F128N imaging. In the Visit 04, we carry out a 4-orbit F128N narrowband imaging. We will (1) use a two-point-dither to populate 1-orbit F128N narrowband imaging; (2) a two-point-dither to populate the next orbit of F128N narrowband imaging; (3) a four-point-dither to populate the last 2-orbit of F128N narrowband imaging. COSMOLOGY Default false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY J2000 J2000 J_AB=24-27 GALAXY HIGH REDSHIFT GALAXY J2000 J2000 J_AB=25-27 WFC3/IR Imaging No No F128N WFC3/IR Imaging No No F128N WFC3/IR Imaging No No F125W POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1 false POS-TARG DITHER 0.636 LINE false false 2 41.788 WFC3-IR-DITHER-LINE 2 false The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13644 :visit-id "01" :proposal-version -1 :trans-version "20140605" :date "24-Jul-2014 09:07:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2158672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13644 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13644 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2902 :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 3241 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13644 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2902 :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 3241 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13644 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2910 :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 3241 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13644 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2910 :al-overhead-at-end 0 :internal-dur-at-end 310 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3241 :pcs-gap 0 ) false 4 0 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. 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CASM was run in Phase II mode. (Tic-Visit :proposal-id 13644 :visit-id "03" :proposal-version -1 :trans-version "20140605" :date "24-Jul-2014 09:18:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 3203216 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13644 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13644 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2840 :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 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13644 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2840 :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 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13644 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2910 :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 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13644 :visit-id "03" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2910 :al-overhead-at-end 0 :internal-dur-at-end 253 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) false 4 0 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. 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