HUBBLE SPACE TELESCOPE DAILY REPORT #1929 PERIOD COVERED: 0000Z (UTC) 07/28/97 - 0000Z (UTC) 07/29/97 Daily Status Report as of 210/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed WF/PC-2 7387 (T-Tauri Star Snapshot Survey) The WF/PC-2 was used to make observations of the star HP-TAUG2 as part of a T-Tauri class star survey. The observations were executed as scheduled, and no anomalies were noted. 1.2 Completed Two Sets of NIC/1/2/3 7328 (High Resolution IR Imaging Survey (IRIS) of the Centers of the Nearest Active Galaxies) The Near Infrared Camera (Camera One, Two and Three) was used to make high resolution infrared observations of the two nearest active galaxy Markarian galaxies IRAS1832-5 and UGC-12138 in order to study their inner nuclear region. Observing in the near-IR minimizes the dust obstruction and maximizes sensitivity to the old stellar population which dominates the mass. The observations were executed as scheduled, and no anomalies were noted. 1.3 Completed WF/PC-2 6469 (Pyramid Imaging of Circumstellar Material About Nearby Stars) The WF/PC-2 was used to make observations of the curcumstellar material around the nearby star HD115892. The WF/PC-2 pyramid was used as a coronagraph to detect the circumstellar material. The observations were executed as scheduled, and no anomalies were noted. 1.4 Completed Two Sets of NIC/1/2/3 7779 (NICMOS One Orbit Parallel - Camera 3 Focus) The Near Infrared Multi-Object Spectrograph (Cameras One, Two and Three) was used to conduct a one-orbit camera focus test taken in parallel with the prime science observations. The tests were completed as scheduled, and no anomalies were noted. 1.5 Completed STIS/CCD 7675 (STIS Non-Scripted Parallel Archive Proposal) The Space Telescope Imaging Spectrograph (CCD) was used in the parallel mode to obtain slitless spectroscopy with the G750L grating to search for emission line galaxies at intermediate to high redshift. The observations were completed as planned, and no anomalies were reported. 1.6 Completed WF/PC-2 6716 (The Pattern of Massive Star Formation in Irregular and Amorphous Galaxies) The WF/PC-2 was used to make observations of the galaxy NGC-4449. The objective is to obtain deep WF/PC-2 images in far-ultraviolet (~1700 A0),U , V, and I bandpasses of the stellar populations in four nearby galaxies known from their observed far-ultraviolet luminosities to be forming massive (OB) class stars. The observations were completed as planned, and no anomalies were reported. 1.7 Completed STIS/CCD 7700 (STIS Non-Scripted Parallel Archive Proposal) The Space Telescope Imaging Telescope (CCD) was used to obtain slitless spectroscopy with the G750L grating to search for emission line galaxies at intermediate to high redshift. Field galaxy surveys have shown that at high redshift most galaxies have strong emission lines, and are compact and blue. This suggests that star formation rates were higher than at present, and that AGN may have been more frequent. The low background and high resolution of HST separates these objects from the background. The proposal completed as planned, and no problems were reported. 1.8 Completed STIS/CCD 7727 (STIS Non-Scripted Parallel Archive Proposal) The Space Telescope Imaging Spectrograph (CCD) was used to obtain parallel slitless spectroscopy with the G750L grating to search for emission line galaxies at intermediate to high redshift. Field galaxy surveys have shown that at high redshift most galaxies have strong emission lines, and are compact and blue. The observations were completed as planned, and no anomalies were reported. 1.9 Completed NIC/1/2 7429 (Uranus' Vertical Haze Structure and its Variation With Latitude) The Near Infrared Camera (Cameras One and Two) was used to make wide range ultraviolet observations of the planet Uranus in order to study its vertical haze structure and its variation with latitude. The wide wavelength range allows determination of aerosol sizes and spectral characteristics superior to previous work. The observations were executed as scheduled, and no anomalies were noted. 1.10 Completed NIC/1 7608 (NICMOS Focus Monitoring) The Near Infrared Camera (Camera One) was used to determine and monitor the optimal focus and tilt settings for all three NICMOS cameras by observing object NGC-3603. This proposal is built to run NIC1/2/3 sweeps on a 2-week basis. The observations completed without incident. 1.11 Completed Three Sets of 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 dark 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, and no anomalies were noted. 1.12 Completed STIS/CCD 7659 (Daily Darks to Update Acquisition Bad Pixel Table) The Space Telescope Imaging Spectrograph (CCD) was used to make dark calibration images in order to update the acquisition bad pixel table. Daily hot pixel lists can also be used for science data analysis. The observations were executed as scheduled, and no anomalies were noted. 1.13 Completed Two Sets of WF/PC-2 6253 (Pure Parallel Archive Program) The WF/PC-2 was used to execute a pure parallel program taking ultraviolet observations running concurrently with prime science observations. The intent is to search for extra-galactic sources with flux excesses at 3000 A0 and galactic sources with excesses at 1600 A0. The observations were completed as planned, and no problems were reported. 1.14 Completed WF/PC-2/STIS/MA1 7308 (HST FAR-UV Imaging and Spectra of Jupiter's Aurora Coordinated With Galileo) The WF/PC-2 and the Space Telescope Imaging Spectrograph (MA1) were used to make far-ultraviolet imaging and spectral observations of the aurora near the south pole of the planet Jupiter at the same time as scheduled Galileo spacecraft measurements of Jupiter's magnetospheric properties and ultraviolet emissions over summer/fall 1997. The observations were completed as planned with no anomalies. 1.15 Completed NIC/1/2/3 7775 (NICMOS Earth Flats) The Near Infrared Spectrograph Multi-Object Camera (NICMOS) was used to make Earth flat calibration observations. This proposal obtains a series of Earth flats for a subset of narrow-, medium-and broad-band NIC 1, 2 and 3 filters. These flats will be used to generate the master flats for narrow-band filters and to determine the OTA illumination pattern as a function of wavelength and camera. The observations were completed as scheduled, and no problems were noted. 1.16 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass Companions to Stars Within 10 pc of the Sun) The Near Infrared Camera (Camera Two) was used to make searching observations for very low mass companions to variable star HD204961. 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 6587 (Black Holes and Cores of Early-Type Galaxies) The WF/PC-2 was used to make observations of early-type galaxy NGC-5018 in order to study its nuclear core region and its possible black hole. The campaign to find black holes in the centers of galaxies using HST has so far been highly successful. The observations were completed as planned, and no problems were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 10 Successful : 10 Scheduled Reacquisitions : 8 Successful : 8 2.2 FHST Updates: Scheduled : 12 Successful : 12 2.3 Operations Notes: The STIS EEPROM was dumped at 209/1458Z. The MCE-2 recovery was performed and Event Flag #2 was cleared at approximately 209/1502Z. The SSR Interrupt Log was dumped at 209/1648Z. The STIS CS Error Counter was cleared at 209/2147Z. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH