Hubble Space Telescope Daily Report #2763 12/06/00
HUBBLE SPACE TELESCOPE
DAILY REPORT #2763
PERIOD COVERED: 0000Z (UTC) 12/05/00 – 0000Z (UTC) 12/06/00
Daily Status Report as of 341/0000Z
1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:
1.1 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-3254 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.
1.2 Completed Two Sets of WF/PC-2 8811 (Cycle 9 Standard Darks)
The WF/PC-2 was used to obtain 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. Over an extended period these data will also provide a monitor of radiation damage to the CCDs. The proposal completed with no reported problems.
1.3 Completed Three Sets of WF/PC-2 8827 (Cycle 9 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 proposal completed nominally.
1.4 Completed STIS/CCD 8631 (Bright Quasar Close Lensing Search II)
The Space Telescope Imaging Spectrograph (CCD) was used to expand the Cycle 8 second generation HST snapshot survey of bright quasars, optimized to find lenses with component image separations < 1". The observations completed nominally.
1.5 Completed STIS/CCD 8838 (Bias Monitor – Part 1)
The Space Telescope Imaging Spectrograph (CCD) was used to monitor the bias in the 1×1, 1×2, 2×1, and 2×2 bin settings at gain=1, and 1×1 at gain = 4, to build up high-S/N superbiases and track the evolution of hot columns. The proposal completed nominally.
1.6 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)
The Space Telescope Imaging Spectrograph (CCD) was used to monitor the darks. The proposal completed with no reported problems.
1.7 Completed WF/PC-2/STIS/CCD 8641 (Testing the Accelerating Universe)
The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used to observe Type Ia supernovae which provide evidence for an accelerating universe: an extraordinary result that needs to be rigorously tested. The observations completed with no reported problems.
1.8 Completed Three Sets of WF/PC-2 8816 (Cycle 9 UV Earthflats)
The WF/PC-2 was used to obtain sequences of earth streak flats to improve the quality of pipeline flat fields for the WFPC2 UV filter set and in order to monitor flat field stability. There were no reported problems.
1.9 Completed STIS/CCD 8562 (Probing the Large Scale Structure: Cosmic Shear Observations)
The Space Telescope Imaging Spectrograph (CCD) was used to probe the distortion of light bundles from distant galaxies, looking at the statistical properties of the intervening inhomogeneous {dark} matter distribution. The proposal completed nominally.
1.10 Completed STIS/CCD 8238 (Collimated Jets and Low Velocity Forbidden Emission from T Tauri Stars)
The Space Telescope Imaging Spectrograph (CCD) was used to make observations of the T-Tauri class star UZ-TAUEi and to study its collimated jets and low velocity forbidden emission lines. This is a program of slitless spectroscopy to image both the low velocity component {LVC} and high velocity component of forbidden line emission in single and binary low mass stars undergoing disk accretion. A calibration CCD flat image was also taken. The observations were executed as scheduled, and no anomalies were noted.
1.11 Completed WF/PC-2 8805 (POMS Test Proposal: WFII Parallel Archive Proposal Continuation)
The WF/PC-2 was used to perform a generic target version of the WFPC2 Archival Pure Parallel program. The program will be used to take parallel images of random areas of the sky, following the recommendations of the Parallels Working Group. The proposal completed with no reported problems.
1.12 Completed STIS/CCD/MA1 8107 (What is the Nature of the Cold Medium in Cooling Flow Clusters?)
The Space Telescope Imaging Spectrograph (CCD and MA1) was used to observe X-ray spectra of cooling flow clusters of galaxies in an attempt to discover the presence of large columns of "cold” absorbing material. The proposal completed with no reported problems.
1.13 Completed STIS/CCD/MA2 7316 (Saturn’s Satellites: Alteration of the Surface by Ion Irradiation on Enceladus and Tethys)
The Space Telescope Imaging Spectrograph (CCD and MA2) was used to make observations of Saturn’s moon Enceladus. Saturn’s medium-sized icy satellites display a diverse range of surface alteration caused by one or more external processes. A wavelength calibration image was also taken. The observations were completed as planned, and no anomalies were noted.
1.14 Completed WF/PC-2 8137 (Intermediate-Age Dwarf Spheroidal Galaxies in the M81 Group)
The WF/PC-2 was used to reconstruct the star-formation history {SFH} of the Local Universe via observations of the SFHs of individual, nearby galaxies and compare the result with the SFH history derived from high-redshift galaxies. The observations completed with no reported anomalies.
1.15 Completed Ten Sets of STIS/CCD 8260 (Searching for the Hydrogen Reionization Edge of the Universe at 5HST)
The Space Telescope Imaging Spectrograph (CCD) was used to observe one of 36 parallel orbits {4–5 fields of 5–8 orbits each} to constrain the H Lyman-edge in emission that marks the transition from a neutral to a fully ionized IGM at a predicted zion~eq5–15. This edge is due to recombination from the H Lyman series and Lyman continuum, and can be used to constrain zion, one of the most important unknown quantities in large scale structure and cosmology. As documented in HSTAR 7991 and 2.1, a loss-of-lock occurred near the beginning of the final iteration of this proposal, the take data flag went down, and observations were possibly affected. Otherwise, the proposal completed nominally.
2.0 FLIGHT OPERATIONS SUMMARY:
2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 5
Successful: 5
Per HSTAR 7991, after a successful acquisition at 340/191209Z and a successful re-acquisition at 340/053122Z, a loss-of-lock occurred on FGS #2 at 341/063135Z. Lock was recovered via the new #44 commands. The proposal described in 1.15 was affected.
Scheduled Re-acquisitions: 7
Successful: 7
2.2 FHST Updates:
Scheduled: 15
Successful: 15
2.3 Operations Notes:
Using ROP SR-1A, the SSR EDAC error counter was cleared three times.
As directed by an operations request, the Charge Control (TRSWCC) Voltage Temperature Front End (VTFE) curves were lowered by 20 Mv at 340/1319Z, to K1 Level 4 + 300 Mv. At the same time the TRSWCC trim relay command interval duration was increased from 10 to 30 seconds. The EPS system then performed as has been predicted. Later, the rate-of-charge test safing test trickle charge timer was set to three orbits (from five) at 340/1434Z.
3.0 SIGNIFICANT FORTHCOMING EVENTS:
Continuation of normal science observations and calibrations.
