This is the updated APT Cycle 20 Phase II proposal for Program 13014:
"The Host Galaxies of High-Luminosity Obscured Quasars at z~2.5".
The key change here was the move from the ACS-WFC aperture, which placed our
quasar targets a little too close to the ACS chip gap for comfort, to the ACS-WFC1
aperture, placing the targets in the middle of the ACS Chip1. The cost was a slight
loss in ACS+WFC3 footprint overlap, but this was considered a very minor issue.----- Attempting Submission 2 (Mon Sep 24 17:56:11 GMT 2012) -----The Host Galaxies of High-Luminosity Obscured Quasars at z~2.5Active Galactic Nuclei play a key role in the evolution of galaxies.
However, very little is known about the host galaxies of the most
luminous quasars at z~2.5, the epoch when massive black hole growth
peaked. The brightness of the quasar itself, which can easily
outshine a galaxy by a large factor, makes it very difficult to study
emission from extended gas or stars in the host galaxy. We propose to
image extended emission from the host galaxies of a unique sample of
six optically extincted (Type II) luminous quasars with z~2.5, with
WFC3/F160W in the rest-frame optical longward of 4000A and ACS/F814W
in the rest-frame near-ultraviolet. These objects are selected from
the spectroscopic database of the SDSS/Baryon Oscillation
Spectroscopic Survey to have strong, narrow emission lines and weak
continua. Because the central engines are obscured, we are able to
image their low surface brightness hosts. With these images, we will
quantify the luminosity, morphology, and dynamical state of the host
galaxies, and search for extended scattered light from the obscured
central engine. Our proposed HST observations will be the first
comprehensive study of both host galaxy light and scattered light in
high-luminosity quasars at the epoch of maximum black hole growth, and
will give insights into the relationship between host galaxies and
black holes during this important, and yet largely unexplored period.The aim of this program is to image relatively faint, extended emission from the host galaxies of a sample of 6 (six) optically extincted (Type II) luminous quasars using ACS/WFC and WFC3/IR. For each object, we propose to observe using ACS/WFC for 2 (two) orbits using the F814W band, and WFC3/IR for one orbit using the F160W band.
We use the ACS-WFC-DITHER-BOX pattern with 4 pointings, twice across two orbits.
This gives us 8 science exposures, with exposure times ranging from 492sec to 602secs each,
once auto-adjust has been run.
For the WFC3 observations, we primarily use the WFC3-IR-DITHER-BOX-MIN pattern, also with 4 points. Here, we use the sampling sequence STEP100, with NSAMP=12, as we understand the log-linear will potentially increase the dynamic range of our final image. We also employ the WFC3-IR-DITHER-BLOB, with 2 pointings and a relatively short exposure using the SPARS25, NSAMP=5 parameters in order to minimize the amount of Unused Visibility in our allocated orbits.
We have successfully run the Orbit and Visit Planner, and performed checks using the BOT and Target Confirmation.
We envisage this is a relatively straightforward program to execute, with no special scheduling,
observing or calibrations requested.AGN/QUASARS12false0.00.0falsefalsefalsefalseSUPPORTEDGALAXYQUASAR4566-626-55630J2000J2000SDSS i-band PSF = 21.12+/-0.08GALAXYQUASAR4623-032-55621J2000J2000SDSS i-band PSF = 21.94+/-0.13GALAXYQUASAR4022-278-55352J2000J2000SDSS i-band PSF =21.74+/-0.09GALAXYQUASAR3951-240-55681J2000J2000SDSS i-band PSF =21.87+/-0.11GALAXYQUASAR4199-540-55481J2000J2000SDSS i-band PSF =21.74+/-0.09GALAXYQUASAR4291-346-55525J2000J2000SDSS i-band PSF= 22.15+/-0.13ACS/WFCImagingNoNoF814WWFC3/IRImagingNoNoF160WACS/WFCImagingNoNoF814WWFC3/IRImagingNoNoF160WACS/WFCImagingNoNoF814WWFC3/IRImagingNoNoF160WACS/WFCImagingNoNoF814WWFC3/IRImagingNoNoF160WACS/WFCImagingNoNoF814WWFC3/IRImagingNoNoF160WACS/WFCImagingNoNoF814WWFC3/IRImagingNoNoF160WPOS-TARGDITHER0.265LINE0.187falsefalse69.05420.67ACS-WFC-DITHER-BOX1falsePOS-TARGDITHER0.572LINE0.365falsefalse74.653418.528WFC3-IR-DITHER-BOX-MIN2falsePOS-TARGDITHERDITHER45.183WFC3-IR-DITHER-BOX-MINfalse74.653true0.3650.572241.859POS-TARGWFC3-IR-DITHER-BLOB18.5283falseThe scheduling data was generated by CASM 20.2.CASM was run in Phase II mode./private/var/folders/wb/wbL5AHzsE2KjnoUlW+x05++++TI/-Tmp-/OPVisit3798737840363067622.xml(Tic-Visit
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