HUBBLE SPACE TELESCOPE DAILY REPORT #2055 PERIOD COVERED: 0000Z (UTC) 02/05/98 - 0000Z (UTC) 02/06/98 Daily Status Report as of 037/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental Darks PT1/3) The WF/PC-2 was used to make supplemental dark calibration images. This set of calibrations is intended to obtain three dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. The observations were executed as scheduled, with no noted anomalies. 1.2 Completed STIS/CCD 7711 (STIS CCD G750L Fringing Flats.) The Space Telescope Imaging Spectrograph (CCD) was used to investigate and monitor the STIS CCD flat-field fringing in the G750L grating at its nominal wavelength setting {7751A}. WAVECALs were also taken at the same gain and wavelength setting. Typical S/N = 100 for each integration, and gain = 4 on each. The observations were executed as scheduled, and no anomalies were noted. 1.3 Completed Two Sets of NIC/2 7331 (Near-IR Properties of the Bulges of Spiral Galaxies) The Near Infrared Camera (Camera Two) was used to make infrared observations of the bulges in the spiral galaxies NGC-406 and NGC-2964. Near-IR data at HST resolution are essential for correcting for the effect of dust and will enable us to derive robust nuclear properties for the sample. The observations were executed as scheduled, and no anomalies were noted. 1.4 Completed WF/PC-2 7431 (Snapshot Survey of Microlensed Source Stars) The WF/PC-2 was used to make snapshot survey images of microlensed source star MACHO-96-B. Gravitational microlensing surveys have revealed an excess of lensing events over theoretical predictions toward both the Large Magellanic Cloud and the Galactic Bulge. The observations were completed as planned, and no anomalies were reported. 1.5 Completed FOC/96 6933 (Calibration of Red End of NUVOP Spectra) The Faint Object Camera (f/96) was used to make observations of NGC-6833. Low resolution of the NUV prism at visible wavelengths has made wavelength and photometric calibrations of this portion of the spectral region difficult. A dark calibration image and an internal flat calibration image were also taken. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed Five Sets of NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98) The Near Infrared Camera (Cameras Two and Three) was used to make pure parallel spectrographic observations of sky regions when another instrument is prime. The observations were completed as planned, and no anomalies were reported. 1.7 Completed Two Sets of STIS/CCD 7911 (STIS Galactic Plane Pure Parallel Program) The Space Telescope Imaging Spectrograph (CCD) was used to make low galactic latitude survey observations in parallel with the prime science observations. Short exposures with the 50CCD imaging mode will provide the wavelength zero-point calibration. These data will be placed immediately into the Hubble Data Archive. The observations were executed as scheduled, and no anomalies were noted. 1.8 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. 1.9 Completed FGS 7487 (Orbits of Pre-Main Sequence Binaries) The Fine Guidance Sensors were used to make astrometric observations of the pre-main-sequence, binary star DF-Tau in order to determine its orbital elements. This is important because there are still no low mass young stars with reliably known masses. The observations were executed as scheduled, and no anomalies were noted. 1.10 Completed Eight Sets of STIS/CCD 7910 (STIS Extragalactic Parallel Survey) The Space Telescope Imaging Spectrograph (CCD) was used to make extragalactic slitless spectrographic observations as part of the parallel high galactic latitude survey to search for emission line galaxies. Data was taken in parallel, and not subject to proprietary time. The observations were executed as scheduled, with no anomalies. 1.11 Completed WF/PC-2 6855 (The Disks Around Young Stellar Objects) The WF/PC-2 was used to make observations of the disk surrounding the young stellar object DG-Tau. Circumstellar material has been detected at 1.3 mm around about 50% of the young (T<10^6 yr) stellar objects in the Taurus-Auriga molecular cloud. The observations permit an estimate of the material's spatial extent, mass and temperature. The observations were executed as scheduled, and no anomalies were noted. 1.12 Completed STIS/CCD 7803 (Daily Darks to Update Acquisition Bad Pixel Table Part III) The Space Telescope Imaging Spectrograph (CCD) was used to make daily dark calibration updates. These daily darks are intended to identify hot pixels for update to the acquisition on-board FSW hot pixel table. Daily hot pixel lists can also be used for science data analysis. The observations were completed as planned, with no anomalies. 1.13 Completed NIC/1/2/3 7266 (High-Resolution IR and Optical Imaging of the Fields Around a Large Sample of Z > 4.5 Quasars) The Near Infrared Camera (Cameras One, Two and Three) was used to make observations of the quasar BR1202-072 in order to make high-resolution infrared and optical imaging of the fields around the quasars. This object appears to be very primitive and may represent early stages in the galaxy formation process. The observations were completed as planned, and no anomalies were reported. 1.14 Completed Four Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats) The WF/PC-2 was used to make a series of Earth flat calibration images. These flat fields will allow mapping of the OTA illumination pattern and will be used in conjunction with previous internal and external flats to generate new pipeline superflats. The observations were completed as planned, and no anomalies were reported. 1.15 Completed STIS/CCD/MA1 7296 (A STIS Probe of Unique ISM Lines-of-Sight Having Measured H and He Ionization Fractions) The Space Telescope Imaging Spectrograph (CCD and MA1) was used to probe the interstellar medium around object 2REJ1032+5 in the far ultraviolet. A wave length calibration image was also taken. The observations were completed as planned, and no anomalies were reported. 1.16 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass Companions to Stars Within 10 Parsecs of the Sun) The Near Infrared Camera (Camera Two) was used to make searching observations for very low mass companions to variable star BD+68D946. This star is known to be within 10 parsecs of the Sun. The observations were executed as scheduled, and no anomalies were noted. 1.17 Completed WF/PC-2 6659 (A Search For Superplanets Around Weak T- Tauri Stars) The WF/PC-2 was used to make observations in the 1 micron band of the T-Tauri class star STAR1601-2 in order to search for superplanets. Weak T-Tauri class stars (WTTS) are thought to have dissipated their circumstellar disks recently, possibly by forming planetary systems. The observations were completed as planned. 1.18 Completed WF/PC-2 7434 (The Supernova Intensive Study) The WF/PC-2 was used to continue the long-term project on supernovae by observing SN1987A. The aim of the proposal is to explore the UV emission from supernovae, exploit the spatial resolution of HST and press the late-time observations of supernovae into uncharted territory. The observations were completed as planned, and no anomalies were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 11 Successful : 11 Scheduled Reacquisitions : 5 Successful : 5 2.2 FHST Updates: Scheduled : 24 Successful : 24 2.3 Operations Notes: NICMOS proposal 7924, which will be described in the next report, successfully tested the coronographic hole location capability. This enhanced capability was in NICMOS flight software (FSW) 4.10. A memory dump for the NICMOS flight software was successfully accomplished at 037/0415Z. The first iteration of STIS proposal 7905, hot pixel determination during CCD target acquisition exposures, a feature of STIS FSW 4.8, was successful. This proposal occurred during the period of the next report. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH