Please find attatched our phaseII submission for 11098. The first time Andrew submitted this he could not process this fullly with APT. I have run APT successfully, and am resubmitting. Andy Fruchter Proposal back to original submission, Target 1 - GSC1 ----- Attempting Submission 1 (Wed Feb 28 00:41:44 GMT 2007) ----- Phase II Proposal 11098 (11098-2) successfully submitted. ----- Attempting Submission 2 (Wed Feb 28 03:54:17 GMT 2007) ----- ----- Attempting Submission 3 (Wed Feb 28 19:59:10 GMT 2007) ----- ----- Attempting Submission 4 (Wed Feb 28 23:51:42 GMT 2007) ----- h Please find attatched a proposal for 12 orbits of Directors Discretionary time entitled "Pinning down the redshift of the J-band dropout JD0910+46". Assigned ID: 1550 ----- Attempting Submission 1 (Mon Feb 26 00:30:25 GMT 2007) ----- Pinning down the redshift of the J-band dropout JD0910+46 The earliest galaxies in the Universe should have formed at very high redshifts, based both on models of hierarchical structure formation, and on observations of the microwave background polarization by WMAP that require significant ionization of the intergalactic medium before z=10. However, direct observation of sources at z>7 remains highly challenging due to their scarcity and faintness. We recently identified a spatially extended J-band dropout, JD0910+46, that is a promising candidate for a z>10 galaxy. Its spectral energy distribution is more extreme than any previously reported: It is undetected in our 2-orbit J-band observation, with a very red J-H color, yet is bluer in H-K than plausible lower redshift (z~3) model SEDs. These colors are, however, natural for a very high redshift star-burst galaxy in which the Lyman-alpha break has moved mostly or entirely through the F110W band. Here we propose deeper F110W and F187W observations to better map the spectral energy distribution of JD910+46, these have the potential to convincingly reject all low redshift solutions for the origin of the observed colours. We believe the importance of such a discovery adds urgency to the followup, and motivates this DD request. Even in the event that JD0910+46 lies at lower redshift understanding the nature of the object will be of great importance since it may lie in a significant overdensity of galaxies at z~4, and will be an important tool for identifying possible interlopers in samples of ultra high-z galaxies.
We wish to observe JD0910+46 using NICMOS. The purpose of these observations is to secure a deep limit (or detection) of JD0910+46 in the F110W band. We will perform a total of eight orbits over two visits with an 8 point dither pattern in each of them. This will allow us to reach 2-sigma limiting magnitudes of F110W(AB)~27.5. We will perform two, four orbit visits, with two exposures per orbit to aid the SAA correction. Each visit will perform a 8-point dither pattern to allow some reconstruction of the PSF via drizzle, while we perform a constant POSTARG offset of 4" between the first and second visit to aid the production of a "master" sky flat. COSMOLOGY 3 false 0.0 false false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY H(AB)=23.8,K(AB)=23.2 J2000 09 09 51.8000 +45 39 48.00 J2000 NIC2 Imaging No No F187W NIC3 Imaging No No F110W /Users/alisonvick/Desktop/OP-cache/11098-v01.xml (Tic-Visit :proposal-id 11098 :visit-id "01" :proposal-version -1 :trans-version "20061109" :date "28-Feb-2007 14:36:33.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 203184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11098 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11098 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2661 :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 3183 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11098 :visit-id "01" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2660 :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 3183 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11098 :visit-id "01" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2660 :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 3183 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11098 :visit-id "01" :orbit-number 4 :pcs-time 355 :si-vis-utilization 2634 :al-overhead-at-end 0 :internal-dur-at-end 46 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3183 :pcs-gap 0 ) false 4 0 /private/tmp/OPVisit4113.xml /Users/alisonvick/Desktop/OP-cache/11098-v02.xml (Tic-Visit :proposal-id 11098 :visit-id "02" :proposal-version -1 :trans-version "20061109" :date "28-Feb-2007 14:36:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 203184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11098 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11098 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2661 :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 3183 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11098 :visit-id "02" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2660 :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 3183 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11098 :visit-id "02" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2660 :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 3183 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11098 :visit-id "02" :orbit-number 4 :pcs-time 355 :si-vis-utilization 2634 :al-overhead-at-end 0 :internal-dur-at-end 46 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3183 :pcs-gap 0 ) false 4 0 /private/tmp/OPVisit4114.xml