Hubble Space Telecope Daily Report #3047 - 1 Feb 2002


HUBBLE SPACE TELESCOPE
DAILY REPORT #3047
PERIOD COVERED: 0000Z (UTC) 01/31/02 - 0000Z (UTC) 02/01/02
Daily Status Report as of 032/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed STIS/CCD 8901 (Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor the darks. There was no anomalous activity.

1.2 Completed WF/PC-2 9118 (Tracing the Cosmic Expansion to z>1 with Type Ia Supernovae)

The WF/PC-2 was used to observe type Ia supernovae in order to provide evidence for an accelerating universe. The case for cosmic acceleration rests almost entirely on the observation that the observed SN Ia at z~0.5 are 0.25 magnitudes fainter than expected for a non-accelerating Universe. It is proposed to follow five SN Ia in the range 0.95 0 cosmology, this experiment is a powerful and straightforward way to assess the reliability of the SN Ia measurements. In addition, if SN Ia are reliable standard candles, the proposed observations will significantly increase the precision with which Omega_Lambda and Omega_M are measured. There was no reported anomalous activity.

1.3 Completed Three Sets of STIS/CCD 9317 (Pure Parallel Imaging Program: Cycle 10)

The Space Telescope Imaging Spectrograph (CCD) was used to perform the default archival pure parallel program for STIS during cycle 10. There were no reported problems.

1.4 Completed STIS/CCD 8903 (Bias Monitor - Part 1)

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 to build up high-S/N superbiases and track the evolution of hot columns. There were no problems.

1.5 Completed WF/PC-2 8802 (Saturn's Rings and Small Moons)

The WF/PC-2 was used to continue the long-term survey of Saturn's to obtain a coherent set of high resolution, multi-color images of the Saturnian ring system over the full range of ring tilt and phase angles accessible from the Earth over the course of 1/4 Saturn year {7 Earth years}. Previous observations explored the rings from their nearly edge-on aspect, just after the most recent ring plane crossings, to their current moderate inclination. Here, it is proposed to complete our survey during the next three Saturn oppositions {Cycles 9--11}, as the rings gradually approach their most open configuration, shortly before the arrival of the Cassini spacecraft at Saturn. The key goals are to investigate the composition, structure, and particle properties of the rings from variations of ring brightness and coGwith radius, tilt and phase angle, to measure the azimuthal asymmetry of the A ring and the temporal variability of the clumpy F ring, to follow the enigmatic behavior of the renegade satellites Prometheus and Pandora, and to observe the co-orbital satellites Janus and Epimetheus as they exchange orbits in February 2002. No problems were observed.

1.6 Completed WF/PC-2 9141 (Fine Scale Temperature Fluctuations in Gaseous Nebulae)

The WF/PC-2 was used to image the Orion and Eskimo nebulae in filter sets that will allow determination of O III 5007 and 4363 Angstrom flux ratios, which is a well calibrated electron temperature determinant. All observations were completed without incident.

1.7 Completed STIS/CCD 9126 (Galaxy Mass and the Fate of Luminous, Blue Compact Galaxies at z~0.6)

The Space Telescope Imaging Spectrograph (CCD) was used to obtain long-slit spectra for a sample of 6 luminous, blue, compact galaxies {LBCGs} at z ~ 0.6. Despite being very luminous, LBCGs have velocity widths Sigma ~ 60 kms and half-light radii r_e ~ 0.5'' {or R_e ~ 3Kpc}. Small sizes and velocity widths suggest LBCGs are low- mass stellar systems , while their blue colors, strong emission lines and low M/L-ratios indicate they are undergoing a major starburst. I f the star-forming process halts after the current burst, models predict that LBCGs will fade by ~2-4 magnitudes after a few Gyrs to reach the low luminosities and surface brightnesses characteristic of spheroidal galaxies. The proposal completed with no reported problems.

1.8 Completed Three Sets of WF/PC-2 9318 (POMS Test Proposal: WFII Parallel Archive Proposal Continuation)

The WF/PC-2 was used to perform the generic target version of the WFPC2 Archival Pure Parallel program. The program was used to take parallel images of random areas of the sky, following the recommendations of the Parallels Working Group. There were no reported problems.

1.9 Completed Two Sets of WF/PC-2 8059 (POMS Test Proposal: Targeted Parallel Archive Proposal)

The WF/PC-2 was used to observe the parallel opportunities available in the neighborhood of bright galaxies are treated in a slightly different way from the normal pure parallels. Local Group galaxies offer the opportunity for a closer look at young stellar populations. Narrow-band images in F656N can be used both to identify young stars via their emission lines, and to map the gas distribution in star-forming regions. The observations completed nominally.

1.10 Completed Two Sets of STIS/MA1/MA2 9120 (Planetary Nebulae In The LMC: A Study On Stellar Evolution And Populations)

The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to investigate the final phase of the evolution of low- and intermediate-mass stars, the Planetary Nebula {PN} ejection that is thought to provide the main source of carbon and nitrogen enrichment in galaxies. The observations completed nominally with no reported problems.

1.11 Completed STIS/MA2 9573 (NUV-MAMA Daily Dark Monitor)

The Space Telescope Imaging Spectrograph (MA2) was used to perform daily monitoring of the NUV MAMA detector dark noise in order to monitor the effects of thermal changes on the NUV dark rate. No problems occurred.

1.12 Completed STIS/CCD/MA1 9036 (An Ultraviolet Spectroscopic Survey of Star-Forming Galaxies in the Local Universe)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to perform a comprehensive STIS ultraviolet spectroscopic survey of star-forming galaxies in the local universe. The sample covers a broad range of morphologies, chemical composition, and luminosity. The observations will provide spectral coverage between 1200 and 3100 Angstrom, at a resolution of 100 to 200 kms and S/N of about 30. The data set will allow the proposers to document and quantify the effects of massive stars on the interstellar medium and to infer implications for the evolution of the host galaxies. The proposal completed with no anomalous activity.

1.13 Completed WF/PC-2 8941 (Cycle 10 UV Earthflats)

The WF/PC-2 was used to monitor flat field stability by obtaining sequences of earth streak flats to improve the quality of pipeline flat fields for the WFPC2 UV filter set. The proposal had no problems.

1.14 Completed STIS/MA2 8920 (Cycle 10 MAMA Dark Measurements)

The Space Telescope Imaging Spectrograph (MA2) was used to perform the routine monitoring of the MAMA detector dark noise, and is the primary means of checking on health of the MAMA detectors systems through frequent monitoring of the background count rate. The proposal completed with no reported anomalous activity.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 10
Successful: 10

Scheduled Re-acquisitions: 4
Successful: 4

2.2 FHST Updates:
Scheduled: 20
Successful: 20

2.3 Operations Notes:

The SSR-1 EDAC error counter was cleared at 031/2023Z per ROP SR-1A.

A TTR was written for a required re-transmit at 031/1420Z during a NSSC-1 load opportunity. Accordingly, SI C&DH errors were reset at 031/1421Z, using ROP NS-5.

A GenSlew was performed at 031/1456Z in support of the proposal described in 1.7.

Target-of-opportunity (TOO) loads were constructed and uplinked early this morning. The proposal will begin execution later this morning.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

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