Hubble Space Telescope Daily Report #2664 07/14/00
HUBBLE SPACE TELESCOPE
DAILY REPORT #2664
PERIOD COVERED: 0000Z (UTC) 07/13/00 – 0000Z (UTC) 07/14/00
Daily Status Report as of 196/0000Z
1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:
1.1 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.
1.2 Completed Five 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.
1.3 Completed STIS/CCD 8844 (Deep Spatial/Spectral PSF Calibration)
The Space Telescope Imaging Spectrograph (CCD) was used to acquire a set of deep spectroscopic images of isolated, point source stars for the purpose of correcting spectroscopic science observations for dispersed residual scattered light along the slit from the point-like central object. Using limited observations from the archive, it is suspected that a dynamic range approaching 10exp7 can be measured from the stellar core to 26" away at the limit of the CCD and aperture edge. The observations completed with no anomalies reported.
1.4 Completed Four 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. The proposal completed with no reported problems.
1.5 Completed WF/PC-2 8597 (The Fueling of Active Nuclei: Why are Active Galaxies Active?)
The WF/PC-2 was used to investigate the accretion onto massive black holes which is believed to be the energy source for AGN. However, evidence for black holes in quiescent galaxies has also been reported. Why are these galaxies inactive? One possibility is that active galaxies are better at providing fuel to the nuclear region than quiescent
galaxies. Other possible fueling mechanisms such as “bars-within-bars” or nuclear spirals cannot be investigated from the ground because they are relatively small features in the ISM. The observations were completed as planned.
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 8808 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation III)
The Space Telescope Imaging Spectrograph (CCD) was used to make non-scripted, parallel observations as part of a POMS test proposal. The observations completed with no anomalous activity.
1.8 Completed STIS/CCD 8850 (Deep CCD/G750M Wavecals)
The Space Telescope Imaging Spectrograph (CCD) was used to obtain deep wavecals that are needed for the long wavelength setting of G750M. It has been noticed that wavelength dispersion errors on the order of 1 pixel in the overlap regions of the long wavelength settings of G750M for GTO and GO Eta Carina long slit spectra. No deep post-launch wavecals exist for these wavelengths. The standard GO wavecals are not deep enough to accurately determine the dispersion relation. There were no reported problems.
1.9 Completed STIS/CCD 8128 (Stalking FLIERs in Planetary Nebualae: a STIS Study)
The Space Telescope Imaging Spectrograph (CCD) was used to observe FLIERs, which are enigmatic pairs of small, low-ionization knots located on opposite sides of the central star of many PNe. Their symmetric locations, equal, opposite and supersonic Doppler shifts {Mach 3-5}, and highly enriched N/O ratios suggest that they are peculiar spitballs ejected recently from the stellar interior. The observations completed nominally.
1.10 Completed STIS/CCD/MA2 8342 (Abundances in Halo Stars and Galactic Element Formation)
The Space Telescope Imaging Spectrograph (MA1 and CCD) was used to make observations of star HD221170 as part of a study of the abundances in halo stars and galactic element formation. The results for the very oldest galactic stars will also provide an important, and independent, age determination for the Galaxy and hence constrain cosmological age estimates. A wavelength calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted.
1.11 Completed STIS/CCD 8439 (Bias Monitor-Part 2 C8)
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 with no reported problems.
1.12 Completed WF/PC-2/STIS/CCD/MA1/MA2 8207 (The Ofpe/WN Stars In M33: Understanding Wolf-Rayet Star Formation In Different Environments)
Both WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) were used to make observations of Wolf-Rayet stars in the galaxy M-33. WF/PC-2 imaging parallel to the primary spectroscopy in UBV and FUV filters will substantially extend our study of the hot massive star population and populous stellar clusters in this galaxy. A wavelength calibration image was also taken. The observations were completed as planned, and no anomalies were reported.
1.13 Completed WF/PC-2 8110 (Supernova Remnants in a Cloudy Interstellar Medium)
The WF/PC-2 was used to observe small cloudlets in the interstellar medium {ISM} that may have a marked effect on the physical structure and evolution of supernova remnants {SNRs}. These WFPC2 images can be combined with complementary observations in other wavelength regimes to identify cloudlets inside remnants, trace SNR shock fronts, determine the physical parameters of interior cloudlets and compare them to those of the hot interior, and investigate the evaporation of shocked cloudlets into the hot cavities of the SNRs. Losses of lock described in HSTAR 7721 and 2.1 occurred during this proposal, probably affecting at least some of the observations.
1.14 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal – Nearby Galaxies – Imaging and Spectroscopy)
The Space Telescope Imaging Spectrograph (CCD) was used to make parallel observations of nearby galaxies. This survey will be useful to study the star formation histories, chemical evolution, and distances to these galaxies. These data will be placed immediately into the Hubble Data Archive. The observations were completed as scheduled, and no problems were reported.
1.15 Completed Two Sets of STIS/CCD 8870 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation IV)
The Space Telescope Imaging Spectrograph (CCD) was used to make non-scripted, parallel observations as part of a POMS test
proposal. Losses of lock described in HSTAR 7721 and 2.1 occurred during both iterations of this proposal, probably affecting at least some of the observations. Otherwise, the observations completed with no further anomalous activity.
2.0 FLIGHT OPERATIONS SUMMARY:
2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 7
Successful: 7
Scheduled Re-acquisitions: 9
Successful: 9
According to HSTAR 7721, there were at least two loss of lock on FGS-3 at approximately 196/022038Z and at approximately
196/022330. Uncertainty is caused by the fact that a zone of exclusion was involved. Proposals described in 1.13 and 1.15 were affected.
The acquisition at 196/060248Z defaulted to fine lock backup on FGS-1 only, possibly affecting four proposals which will appear in the next report: WF/PC-2 8609, STIS 8870, STIS 8808, and STIS 8437. HSTAR 7722 was written.
2.2 FHST Updates:
Scheduled: 16
Successful: 16
2.3 Operations Notes:
Using ROP SR-1A, the SSR EDAC error counter was cleared at 195/2310Z.
3.0 SIGNIFICANT FORTHCOMING EVENTS:
Continuation of normal science observations and calibrations.
