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HUBBLE SPACE TELESCOPE

DAILY REPORT #2574

PERIOD COVERED: 0000Z (UTC) 03/06/00 - 0000Z (UTC) 03/07/00

Daily Status Report as of 067/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed WF/PC-2 8460 (Cycle 8 Supplemental Darks pt2/3)

The WF/PC-2 was used to obtain three dark frames every day to
provide data for monitoring and characterizing the evolution of hot
pixels. The observations completed with no reported problems.

1.2 Completed Two Sets of STIS/CCD 8437 (Dark Monitor-Part 2 C8)

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

1.3 Completed WF/PC-2 8146 (A Search for Binary L-Dwarfs)

The WF/PC-2 was used to search for close binaries amongst the
sample of 37 low-temperature L dwarfs, identified primarily in the course
of the DENIS and 2MASS near-infrared surveys. The observations completed
with no reported problems.

1.4 Completed STIS/CCD 8189 (The Source of Gamma Ray Bursts and the
Nature of their Hosts)

The Space Telescope Imaging Spectrograph (CCD) was used to make
high resolution optical and ultraviolet observations a Target of
Opportunity Gamma Ray Burster (GRB) and its host galaxy. This
comprehensive set of observations will provide new insights into the
astrophysics of GRBs and their high redshift host galaxies. The
observations were completed as planned, and no problems were reported.

1.5 Completed Three Sets of WF/PC-2 8442 (WF/PC-2 Cycle 8 Standard Darks)

The WF/PC-2 was used to make a series of Cycle 8 standard dark
calibration observations. This dark calibration program obtains dark
frames every week in order to provide data for the ongoing calibration of
the CCD dark current rate, and to monitor and characterize the evolution of
hot pixels. The observations were executed as scheduled, and no anomalies
were noted.

1.6 Completed Two Sets of WF/PC-2 8445 (WF/PC-2 Cycle 8 Earth Flats)

The WF/PC-2 was used to make Cycle 8 Earth flat calibration
observations. This is to obtain sequences of earth streak flats to
construct high quality flat fields for the WF/PC-2 filter set. The
observations were executed as scheduled, and no anomalies were noted.

1.7 Completed WF/PC-2 8216 (T Tauri Star Snapshot Survey II. Completing
the CTTs Sample)

The WF/PC-2 was used to make observations of the T-Tauri class star
known as UX-ORI as part of Snapshot Survey II. This database will be of
fundamental importance to understanding the nature of planet-forming
environments and their frequency in the galaxy. The observations were
executed as scheduled, and no anomalies were noted.

1.8 Completed Two Sets of STIS/CCD 8796 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation IV)

The Space Telescope Imaging Spectrograph (CCD) was used in the
parallel mode to make some low galactic latitude archive observations. The
observations were executed as scheduled, and no anomalies were noted.

1.9 Completed Two Sets of STIS/CCD 8411 (STIS CCD Spectroscopic Flats C-8)

The Space Telescope Imaging Spectrograph (CCD) was used to obtain
CCD flats in the spectroscopic mode. The observations were completed as
scheduled, and no anomalies were reported.

1.10 Completed WF/PC-2 8301 (A Snapshot Survey of X-ray Selected
Central Cluster Galaxies)

The WF/PC-2 was used to make snapshot survey observations of an
x-ray, central cluster galaxy. Central cluster galaxies are the most
massive stellar systems known and have been used as standard candles for
many decades. The observations were executed as scheduled, and no
anomalies were noted.

1.11 Completed STIS/CCD 8549 (POMS Test Proposal: Non-Scripted Parallel
Proposal Continuation I)

The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude, non-scripted parallel observations as part of a POMS
test proposal. The observations were completed as planned, and no
anomalies were reported.

1.12 Completed STIS/CCD 8228 (The Black Hole Versus Bulge Mass
Relationship in Spiral Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the galaxy NGC-5577 in order to study the black hole versus
bulge mass relationship in spiral galaxies. A wavelength calibration image
was also taken. The observations were executed as scheduled, and no
anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 9
Successful: 9

Scheduled Re-acquisitions: 7
Successful: 7

2.2 FHST Updates:
Scheduled: 23
Successful: 23

2.3 Operations Notes:

The proposal described in 1.4 above is a Target of
Opportunity. This proposal completed with no reported problems.

Using ROP SR-1A, the SSR EDAC error counter was cleared twice.

The 486 ESB was dumped and cleared at 066/2024Z per ROP DF-24A.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW