Hubble Space Telescope Daily Report #2790 01/19/01
HUBBLE SPACE TELESCOPE
DAILY REPORT #2790
PERIOD COVERED: 0000Z (UTC) 01/18/01 – 0000Z (UTC) 01/19/01
Daily Status Report as of 019/0000Z
1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:
1.1 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.
1.2 Completed Two 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.
1.3 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 WF/PC-2/STIS/CCD 8697 (Stellar Populations in the Disk-Halo Interface of NGC 55)
The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) was used to investigate the disk-halo interface which is where the global effects of stellar feedback on the ISM are expected to be most
pronounced. Our deep ground-based emission–line images of the nearby, edge–on SBm galaxy NGC 55 provide a particularly spectacular example of this phenomenon. The observations completed with no anomalous activity.
1.5 Completed WF/PC-2/STIS/CCD 8573 (Newborn Planets and Brown Dwarf Companions in IC 348)
The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used to search for young giant planets and brown dwarfs around ~100 low-mass stars and brown dwarfs in the nearby cluster IC 348. The observations completed with no reported problems.
1.6 Completed WF/PC-2/STIS/CCD 8559 (The Role of Dark Matter in Cluster Formation and Galaxy Evolution)
The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used to observe the outer regions of massive clusters that represent transitional areas of great cosmological importance where field galaxies encounter the steep potential wells of dark matter and baryonic hot gas. Little is known about either the dark matter profile at large radii or the morphological properties of infalling galaxies at those redshifts where strong evolution is observed in the cluster cores. The proposal completed normally, with no reported problems.
1.7 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.
1.8 Completed STIS/CCD/MA1 8695 (The Nature and Distribution of O VI Absorbers in the Vicinity of Galaxies)
The Space Telescope Imaging Spectrograph (CCD and MA1) was used to study PG1259+593 with the E140M echelle mode to substantially improve the statistical base of observed O VI absorbers {including weak lines} for comparison with the cosmological models and to constrain the physical conditions and abundances in these systems and their relationships with galaxies. With these observations we will {1} measure the number of O VI absorbers per unit redshift {dN/dz} with a limiting equivalent width of W_Lambda ~25 mAngstrom , {2} examine whether the O VI absorption arises in photoionized, collisionally ionized, or multiphase gas, {3} estimate the absorber metallicities, and {4} study the dependence of the absorber properties on the proximity of luminous galaxies. The observations completed nominally.
1.9 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.
1.10 Completed Two Sets of STIS/CCD 8663 (Survey of SMC Planetary Nebulae: Nebular and Stellar Evolution in a Low- Metallicity Environment)
The Space Telescope Imaging Spectrograph (CCD) was used to survey of SMC planetary nebulae {PNe} in order to study the co-evolution of the nebulae and their central stars, in an environment that is chemically very metal poor. We will obtain STIS imaging and medium-resolution slitless spectroscopy that will yield line fluxes and nebular morphologies in important emission lines, plus magnitudes of the central stars. From these data we will gather a harvest of information: the nebular size, morphology, ionization structure, density, and mass; and the central star temperature, luminosity, and mass. The proposal completed with no reported anomalies.
2.0 FLIGHT OPERATIONS SUMMARY:
2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 7
Successful: 7
Scheduled Re-acquisitions: 4
Successful: 4
2.2 FHST Updates:
Scheduled: 17
Successful: 17
2.3 Operations Notes:
The SSR EDAC error counter was cleared five times per ROP SR-1A.
SSA transmitter #1 was turned on at 019/004401Z and turned off at 019/010955Z, using RP IC-2.
3.0 SIGNIFICANT FORTHCOMING EVENTS:
Continuation of normal science observations and calibrations.
