Now has GSC-2 (ICRS) coordinates specified.
Visit 2 must have same ORIENT as visit 1 ----- Submission 1 (Thu May 18 23:11:45 GMT 2006) -----
Phase II Proposal 10887 (10887phaseII) successfully submitted.
----- Submission 2 (Mon May 22 21:03:54 GMT 2006) -----
Phase II Proposal 10887 (10887phaseII_unconstrorient) successfully submitted.
----- Submission 3 (Fri May 26 21:15:35 GMT 2006) -----
Phase II Proposal 10887 (10887v2phaseII) successfully submitted.
----- Submission 4 (Fri May 26 21:24:40 GMT 2006) -----
----- Attempting Submission 5 (Tue Mar 06 10:04:37 GMT 2007) -----
Assigned ID: 707
----- Submission 1 (Sat Jan 28 00:58:37 GMT 2006) -----
Stellar Populations in a z=4 Lensed Galaxy with NICMOSWe propose to use NICMOS on HST to undertake deep high-resolution
H-band imaging of a z=4 galaxy, lensed by a rich foreground cluster
into highly-magnified arcs 3-5arcsec in length. By combining this with
existing deep K-band imaging from Keck and high-quality archival WFPC2
and ACS data, we can spatially resolve stellar populations along the
arcs. The WFPC2 images clearly reveal several bright knots, which may
correspond to sites of active star formation. Indeed, our Keck/LRIS
spectra (Bunker, Moustakas & Davis 2000) are consistent with OB-star
spectral energy distributions in the rest-ultraviolet. However, there
are considerable portions of the arcs which appear redder with no
Ly-alpha emission, consistent with being post-starburst regions. The
sensitivity and resolution afforded by NIC2 is crucial to study the
inter-knot flux in H-band (F160W), a goal unachievable from the
ground. In conjunction with our deep Keck K' data, NIC2 imaging will
straddle the 4000Ang+Balmer break and thus allow us to `age-date' the
stellar populations by the inferred amplitude of the break along the
transverse extent of the arcs. We can achieve this in 8 orbits, and
address whether this star-forming galaxy at z=4 has had extended
formation histories - vital for the interpretation of the Lyman Break
Galaxies, and their relation to the evolved Extremely Red Objects.16 half-orbit NIC2 images with the F160W filter,
comprising two visits each of 4 orbits (8 pointings) dithered in a spiral pattern.
ORIENT set such that WFPC2 parallels cover some of cluster.
Visit 1 has F606W R-band imaging and visit 2 has F814W I-band.
Default NIC1 parallels in F160W (visit 1) and F110W (visit 2) included.UNRESOLVED STELLAR POPULATIONS12false0.0falsefalsefalsefalsefalsefalseSUPPORTEDGALAXYLYMAN ALPHA CLOUDHIGH REDSHIFT GALAXYGRAVITATIONAL LENSThis object was generated by the targetselector and retrieved from the NED database.J200021 53 33.5200+17 41 57.40J2000NIC2ImagingNoNoF160WACS/WFCImagingNoNoF775WACS/WFCImagingNoNoF850LPPOS-TARGDITHERDITHER1NIC-XSTRIP-DITHfalsefalse80POS-TARGNIC-SPIRAL-DITH01false/private/tmp/OPVisit29170.xml
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:date "06-Mar-2007 09:37:32.0"
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:saa-model "23"
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(Tic-Orbit
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true40/private/tmp/OPVisit39207.xml