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30 April 2003

HUBBLE SPACE TELESCOPE

DAILY REPORT        # 3352

PERIOD COVERED: DOY 119 (partial day observations due to safemode
event-see SIGNIFICANT EVENTS section)

Part 2 of 3

NICMOS 9484

The NICMOS Parallel Observing Program

NICMOS parallel program and the public parallel NICMOS programs in
cycle 7 prepared us to make optimal use of the parallel
opportunities. The NICMOS G141 grism remains the most powerful survey
tool for HAlpha emission-line galaxies at cosmologically interesting
redshifts. It is particularly well suited to addressing two key
uncertainties regarding the global history of star formation: the
peak rate of star formation in the relatively unexplored but critical
1<= z <= 2 epoch, and the amount of star formation missing from UV
continuum-based estimates due to high extinction. Our proposed deep
G141 exposures will increase the sample of known HAlpha
emission-line objects at z ~ 1.3 by roughly an order of magnitude. We
will also obtain a mix of F110W and F160W images along random
sight-lines to examine the space density and morphologies of the
reddest galaxies. The nature of the extremely red galaxies remains
unclear and our program of imaging and grism spectroscopy provides
unique information regarding both the incidence of obscured star
bursts and the build up of stellar mass at intermediate redshifts. In
addition to carrying out the parallel program we will populate a
public database with calibrated spectra and images, and provide
limited ground- based optical and near-IR data for the deepest
parallel fields. 

WFPC2 9594

WFPC2 CYCLE 11 SUPPLEMENTAL DARKS pt2/3

This dark calibration program obtains 3 dark frames every day to
provide data for monitoring and characterizing the evolution of hot
pixels 

STIS 9606

CCD Dark Monitor-Part 2

Monitor the darks for the STIS CCD.

STIS 9608

CCD Bias Monitor - Part 2

Monitor the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at
gain=1, and 1x1 at gain = 4, to build up high-S/N superbiases and
track the evolution of hot columns.

ACS 9658

ACS Earth Flats

This program will obtain sequences of flat field images by observing
the bright Earth. Several UV filters from the interim calibration
program {9564} require additional exposures to obtain the required
illumination. A few UV filters from this program will be repeated to
monitor for changes in the flat fields and to verify the interim
results. Since no streaks are observed in the UV, the wavelength
coverage is extended to longer wavelengths in order to explore the
severity of streaks in the flats from clouds in the FOV. We have
added exposures for the HRC in the visible filters to verify the
results derived from the L-flat campaign and to explore the severity
of streaks. We have also added exposures on WFC using the minimum
exposure time and using filters which will not saturate the brightest
WFC pixel by more than 10 times the full well. 

WFPC2/PC1 9663

Focus Monitoring

The HST focus is monitored using WFPC2/PC1. In principle ACS/HRC
should provide superior capability for monitoring the HST focus.
Since most of the HST science will shift to ACS in Cycle 11 trending
observations are continued with this program to establish the focus
of WFPC2/PC1 {and hence HST} and ACS/HRC {and WFC to a lessor degree}
using exposures over full orbits that are taken in parallel.  With
parallel exposures breathing cancels out for the relative camera
offset.

ACS 9674

CCD Daily Monitor

This program consists of basic tests to monitor, the read noise, the 
development of hot pixels and test for any source of noise in ACS CCD
detectors. This programme will be executed once a day for the entire
lifetime of ACS. 

STIS 9708

STIS Pure Parallel Imaging Program: Cycle 11

WFPC2 9709

POMS Test Proposal: WFII parallel archive proposal

Used to take parallel images of random areas of the sky, following
the recommendations of the 2002 Parallels Working Group.

WFPC2 9710

POMS Test Proposal: WFII backup parallel archive proposal

This is a POMS test proposal designed to simulate scientific plans.

 - Continued -

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