Hubble Space Telescope Daily Report #2732 10/20/00
HUBBLE SPACE TELESCOPE
DAILY REPORT #2732
PERIOD COVERED: 0000Z (UTC) 10/19/00 – 0000Z (UTC) 10/20/00
Daily Status Report as of 294/0000Z
1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:
1.1 Completed Three Sets of WF/PC-2 8826 (Cycle 9 Supplemental Darks pt 1)
The WF/PC-2 was used to perform a T dark calibration program that obtains three dark frames every day in order to provide data for monitoring and characterizing the evolution of hot pixels. There were no reported anomalies.
1.2 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.
1.3 Completed STIS/CCD 8684 (Emission Lines from Photoionized Accretion Disks and Winds in AGNs)
The Space Telescope Imaging Spectrograph (CCD) was used to observe the origin and dynamics of the gas that produces the broad optical and ultraviolet emission lines in AGNs, a fundamental gap that remains in our knowledge of AGNs. The proposal completed with no reported problems.
1.4 Completed Two Sets of 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.
1.5 Completed STIS/CCD 8104 (Constraints on the Evolution of Powerful Radio Galaxies)
The Space Telescope Imaging Spectrograph (CCD) was used to make observations of 3C303.1. Recent work has identified the GHz Peaked Spectrum and Compact Steep Spectrum radio sources as the most likely candidates for the progenitors of the large-scale powerful classical double sources. Both a wavelength calibration image and a CCD flat calibration image were also taken. The observations were completed as planned, and no anomalies were reported.
1.6 Completed WF/PC-2 8601 (A Snapshot Survey of Probable Nearby Galaxies)
The WF/PC-2 was used to continue the very successful snapshot survey in order to use the high spatial resolution of HST to determine whether selected galaxies are nearby on the basis of resolution into stars, and the magnitudes and colors of the brightest stars. There were no reported problems.
1.7 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.
1.8 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.
1.9 Completed STIS/CCD/MA1 8691 (Calibrating the Cosmic Meter Stick: The Distance to the LMC Using Eclipsing Binaries)
The Space Telescope Imaging Spectrograph (CCD and MA1) was used to measure the LMC distance which is crucial for the calibration of the Cosmic Distance Scale. The loss-of-lock described in 2.1 and HSTAR 7917 occurred during this proposal, possibly affecting an observation. Otherwise, the observations completed with no further reported problems.
1.10 Completed 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.
1.11 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 loss-of-lock described in 2.1 and HSTAR 7917 occurred during the first iteration of this proposal, possibly affecting an observation. Otherwise, the observations completed nominally.
1.12 Completed STIS/CCD 8291 (The Alpha-Element/Iron Ratio in Starburst Populations)
The Space Telescope Imaging Spectrograph (CCD) was used to observe A and F supergiants in NGC1569, the closest starburst galaxy. Spectra around 6200 Angstrom taken with the G750M grating will be used to determine element abundances of Fe and several Alpha-elements. The galaxy has experienced a strong starburst over the past few hundred Myr and possibly only very few and much less intense episodes of star formation at earlier epochs. Chemical evolution models predict a significant Alpha/Fe enhancement in the galaxy. The proposal completed with no reported anomalies.
1.13 Completed WF/PC-2 8829 (Observatory Focus Monitor)
The WF/PC-2 was used to analyze the HST focus which drifts slowly and shows evidence of undergoing slips of a few microns at random times. The rate of the WFPC2 monitoring program is insufficient to track and/or understand OTA behavior in order to request timely and appropriate secondary mirror corrections. This 14 orbit program obtains a large amount of high signal to noise focus data, sometimes in two Science Instruments at once, and will be sufficient to more accurately define the HST
focus. There were no reported problems
1.14 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.
2.0 FLIGHT OPERATIONS SUMMARY:
2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 8
Successful: 8
Scheduled Re-acquisitions: 5
Successful: 5
FGS-2 lost lock during the re-acquisition at 293/121757Z when the scan step was exceeded. However, the re-acquisition was
successful. Proposals described in 1.9 and 1.11 may have been affected.
2.2 FHST Updates:
Scheduled: 19
Successful: 19
2.3 Operations Notes:
Using ROP SR-1A, the SSR EDAC error counter was cleared five times.
3.0 SIGNIFICANT FORTHCOMING EVENTS:
Continuation of normal science observations and calibrations.
