HUBBLE SPACE TELESCOPE

DAILY REPORT # 3121

PERIOD COVERED: 0000Z (UTC) 05/20/02 - 0000Z (UTC) 05/21/02

OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

NICMOS 8790

NICMOS Post-SAA calibration - CR Persistence Part 1.

A new procedure proposed to alleviate the CR-persistence problem of NICMOS. 
Dark
frames will be obtained immediately upon exiting the SAA contour 23, and
every time a NICMOS exposure is scheduled within 50 minutes of coming out 
of the
SAA. The darks will be obtained in parallel in all three NICMOS Cameras. The
POST-SAA darks will be non-standard reference files available to users with a
USEAFTER date/time mark.

STIS/CCD 8902

Dark Monitor-Part 2.

The Space Telescope Imaging Spectrograph (CCD) was used to monitor the darks.

STIS/CCD 8904

Bias Monitor-Part 2.

The Space Telescope Imaging Spectrograph (CCD) was used to monitor the bias in
the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at gain = 4 in order
to build up high-S/N superbiases and track the evolution of hot columns.

WFPC2 8938

WFPC2 CYCLE 9 SUPPLEMENTAL DARKS pt3/3.

characterizing the evolution of hot pixels.

ACS/WFC/HRC 8947

Weekly Test.

noise, the development of hot pixels and test for any source of noise in 
ACS CCD
detectors. This program will be executed at least once a day for the entire
lifetime of ACS.

STIS/CCD 9066

Closing in on the Hydrogen Reionization Edge of the Universe.

The Space Telescope Imaging Spectrograph (CCD) was used in parallel constrain
the Hydrogen reionization edge in emission that marks the transition from a
neutral to a fully ionized IGM at a predicted redshifts.

STIS/CCD/MA1 9154

Spatial Distribution Of The Gas Inside The Beta Pic Disk.

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to investigate
the gas and dust disk surrounding Beta Pictoris that will give clues to the
understanding of the late stages of planetary formation.

WF/PC-2 9251

Cycle 10 Photometric Characterization.

The WF/PC-2 was used to provide a check of the zeropoints and contamination
rates in non-standard WF/PC-2 filters.

NICMOS 9269

NICMOS Parallel Thermal Background

NICMOS Camera 3 pure parallel exposures in the F222M filter will be 
obtained for
the entire duration of SMOV to establish the stability of the 
HST+NCS+Instrument
thermal emission.

ACS 9301

PHOTOMETRY AND GRISM SPECTROSCOPY IN HDF NORTH/SOUTH

Take deep ACS images and grism exposures of fields with very deep infrared
imaging data. The combined optical - infrared data and grisms will be uniquely
suited to study galaxies at high redshift: very high redshift galaxies from the
grism data, and internally red galaxies from the combined optical - IR imaging.
The comparison of the grism redshifts with groundbased spectroscopy will enable
an evaluation of the effectiveness of the grism for redshift studies. The 3
fields of interest for this study are: 1} HDF North, 2} HDF South, 3} 
MS1054-03.

STIS/CCD 9317

Pure Parallel Imaging Program: Cycle 10.

program for STIS during cycle 10.

WF/PC-2 9318

POMS Test Proposal: WFII Parallel Archive Proposal Continuation.

The program was used to take parallel images of random areas of the sky,
following the recommendations of the Parallels Working Group.

ACS/WFC 9575

Default {Archival} Pure Parallel Program.

The Advanced Camera for Surveys (WFC) was used to test ACS pure parallels in
POMS.

ACS 9586

ACS Polarization Calibration

This proposal aims to calibrate the polarization modes most heavily used in
Cycle 11. We need L-flat observations, observations of a polarized star and an
unpolarized star, and an observation of an extended polarized source.

FLIGHT OPERATIONS SUMMARY:

HSTARs:
None

COMPLETED OPS REQs:
Ops Request 16777-1; Complete thru step 20; Battery 5 discharge start @ 
142/0032z
Ops Request 16776-0; Configured SSR#1 for continuous engineering record @ 
142/0635z

OPS NOTES EXECUTED:
939-1 - NSSC-1 Load in Count Mode @ 142/0353z


              SCHEDULED     SUCCESSFUL    FAILURE TIMES
FGS GSacq       6             6
FGS REacq       6             6
FHST Update    13            13
LOSS of LOCK    None

Operations Notes:

SIGNIFICANT EVENTS:

Continuation of Servicing Mission Orbital Verification and the gradual
resumption of normal science observations and calibrations.