HUBBLE SPACE TELESCOPE DAILY REPORT #2268 PERIOD COVERED: 0000Z (UTC) 12/10/98 - 0000Z (UTC) 12/11/98 Daily Status Report as of 345/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Two Sets of WF/PC-2 7377 (Dwarf Elliptical Galaxy Snapshot Survey II) The WF/PC-2 was used to make observations of the dwarf elliptical galaxies VCC1165 and VCC1530 as part of Snapshot Survey II. This survey will provide important information on the globular cluster systems of such galaxies and the properties of their cores and nuclei. The observations were completed as planned, and no anomalies were reported. 1.2 Completed Nine Sets of STIS/CCD 8062 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation) The Space Telescope Imaging Spectrograph (CCD) was used to make high galactic latitude observations taken in parallel with the prime science observations. As described in HSTAR 6804 and yesterday's report, the acquisition for the fourth iteration of this proposal failed and the take data flag remained down. One observations was lost. Otherwise, the observations were completed as planned, and no further problems were reported. 1.3 Completed Three Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental Darks pt3/3) The WF/PC-2 was used to make supplemental dark calibration images. This dark calibration program obtains three dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. The observations were completed as planned, and no anomalies were noted. 1.4 Completed Thirteen Sets of NIC/1/2/3 7963 (Darks: Warming Up) The Near Infrared Camera (Cameras One, Two and Three) was used to monitor the detector dark current during the interval between the end of science observations and the exhaustion of cryogen and subsequent warming of the dewar to > 100K. The observations were completed as planned, and no anomalies were noted. 1.5 Completed FOC/96 6349 (Snapshot search for High Redshift QSOs with Far-UV Flux) The Faint Object Camera (f/96) was used to make snapshot images of the quasi-stellar object Q0428-136. This is to determine if this high redshifted object has a far ultraviolet flux. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed FGS 7492 (The Distances to Dwarf Novae, and the Calibration of the Technique of Infrared Spectroscopic Parallax) The Fine Guidance Sensors were used to make astrometric observations of the dwarf nova SS-Cyg and several other reference stars. The distances to dwarf novae are poorly known. The distance to the object can be measured using a technique of infrared spectroscopic parallax. The observations were completed as scheduled, and no anomalies were noted. 1.7 Completed Four Sets of NIC/1/2/3 7961 (Flats: Warming Up) The Near Infrared Camera (Cameras One, Two and Three) was used to monitor the flat fields during the interval between the end of science observations and the exhaustion of cryogen and subsequent warming of the dewar to > 100K. These flats will provide a monitor for particulate comtamination and detector lateral position {from the coronagraphic spot and FDA vignetting}. The proposal completed with no reported problems. 1.8 Completed Two Sets of WF/PC-2 6363 (The Environments and Host Galaxies of BL-Lac Objects) The WF/PC-2 was used to make snapshot survey observations of BL-Lac objects H0506-039 and MS1402.3+0 in order to study their environment and their host galaxies. The goal is to investigate systematic trends in host galaxy type, unusual morphological features, nearby companion galaxies, etc. The observations were executed as scheduled, and no anomalies were noted. 1.9 Completed STIS/CCD 7361 (The Nature of Nuclear Activity in Nearby Galaxies) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of the nuclear region of galaxy N278. The high resolution spectra will be used to search for broad components in H-Alpha and for velocity gradients, indicative of gas rotation or other ordered motions. A wavelength calibration observation was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.10 Completed Three Sets of WF/PC-2 8061 (POMS Test Proposal: WF-II Backup Parallel Archive Proposal) This is a POMS test proposal designed to simulate scientific plans. The proposal was executed as planned, and no anomalies were reported. 1.11 Completed WF/PC-2 6967 (Blue Continuum Snapshots of 3CR Radio - Continued Galaxies) The WF/PC-2 was used to be used to make observations of the radio galaxy 3C173.1. Radio galaxies are an important class of extragalactic objects: they represent one of the most energetic astrophysical phenomena; they may be used as probes of their environments; and they are unique probes of the early Universe. As described in HSTAR 6804 and yesterday's report, the acquisition for this proposal failed and the take data flag remained down. Two observations were lost. 1.12 Completed FOC/96 6702 (Multicolor Imaging Polarimetry of Obscured Seyfert 2 Nuclei) The Faint Object Camera (f/96) was used to make multi-color imaging observations of the active galactic nuclei of Seyfert galaxy Mark-3in order to measure its polarized flux. The observations wereexecuted as scheduled, and no anomalies were noted. 1.13 Completed Three Sets of WF/PC-2 7909 (POMS Test Proposal: WF II Parallel Archive Proposal) The WF/PC-2 was used to make parallel observations as part of the POMS test proposal. This test proposal is designed to simulate scientific plans. The observations were completed as planned, and no problems were reported. 1.14 Completed Three Sets of STIS/CCD 8084 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation) The Space Telescope Imaging Spectrograph (CCD) was used to make non-scripted parallel high galactic latitude observations as part of POMS test proposal. The observations were executed as scheduled, and no anomalies were noted. 1.15 Completed STIS/CCD 7948 (CCD Dark and Bias Monitor -- Cont. to Dec. 98) The Space Telescope Imaging Spectrograph (CCD) was used to measure CCD dark current and bias rates for the two supported amplifier settings {GAIN=1 and GAIN=4} in order to gather data for making superdarks and superbiases. The data will be used to track the growth of hot pixels on the CCD in general and within the various target acquisition apertures specifically. Observations were made using object NGC-5139. A dark and bias calibration observation were also taken. The observations were executed as scheduled, and no anomalies were noted. 1.16 Completed STIS/CCD 7617 (The BAL Region Covering Factor in a Sample of IRAS-Selected QSOs - Part 2) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of BL-Lac/QSO object IR0759+650. This work has relevance to investigations of QSO geometries, intrinsic QSO properties, and possible evolutionary phenomena in QSOs. The observations were executed as scheduled, and no anomalies were noted. 1.17 Completed WF/PC-2 6666 (The Mass Function and Binary Star Fraction of the Trapezium Cluster) The WF/PC-2 was used to take deep images of the Trapezium cluster in the Orion Nebula to determine the low-mass end of the initial mass function, to search for brown dwarfs, and to explore the close binary population in the cluster. The observations completed as planned with no problems. 1.18 Completed STIS/CCD 7639 (STIS CCD Imaging Sensitivity Monitor) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of the globular cluster NGC-5139 (a.k.a., Omega Cen) in order to monitor the CCD's sensitivity. This proposal should give a check on the long-term, full-field photometric stability of the instrument. A bias observations and a dark calibration image were also taken. The observations were executed as scheduled, and no anomalies were noted. 1.19 Completed WF/PC-2 6776 (A Comparative HST Imaging Study of Radio Galaxies and Hosts) A clear understanding of the nature of the host galaxies of radio-quiet quasars, radio-loud quasars and radio galaxies is of central importance in any attempt to unify and relate the three main classes of powerful active galaxies. Existing HST studies of quasar hosts, whilst producing many interesting new results, have yielded surprisingly little hard information on the properties of the hosts themselves. This imaging study using the WF/PC-2 will remedy this situation by undertaking redder, line-free observations of the AGN 1342-016. The proposal completed with no reported problems. 2.0 FLIGHT OPERATIONS SUMMARY 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 10 Successful : 10 Scheduled Reacquisitions : 4 Successful : 4 2.2 FHST Updates: Scheduled : 19 Successful : 19 2.3 Operations Notes: Using ROP SR-1, the SSR EDAC error counter was cleared five times. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH