HUBBLE SPACE TELESCOPE DAILY REPORT #1672 PERIOD COVERED: 0000Z (UTC) 07/10/96 - 0000Z (UTC) 07/11/96 Daily Status Report as of 193/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Three 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. 1.2 Completed WF/PC-2 6348 (Blue Continuum Snapshots of 3CR Radio = Galaxies) The WF/PC-2 was used to make some snapshot images of the blue = continuum in radio galaxy 3C274.1. Combined with existing data, these = exposures will provide high spatial resolution information on the color = distribution within galaxies, redding due to dust, spacial indices of the = optical synchrotron jets, and colors of the active nuclei and tidal jets. = The observations were executed as scheduled, and no anomalies were = noted. 1.3 Completed FOS/BL 6612 (Damped Lyman-Alpha Absorption Lines From = Moderate Redshifted Galaxies) The Faint Object Spectrograph (Blue Side) was used to make = observations of the moderately redshifted galaxy/QSO PG1552+011 in order = to study the damped Lyman-Alpha absorption lines which are located in the = line-of-sight to the object. In addition, the neutral H column density = will be determined. The observations were completed as planed and no = problems were reported. 1.4 Completed WF/PC-2 6431 (Determination of the Extragalactric = Distance Scale) The WF/PC-2 was used to make observations of the galaxy NGC4535 to = be used in measuring the periods of Cepheid variable stars within this = galaxy. This will allow for a more accurate estimate of the distances to = these galaxies through the period-luminosity relation for the Cepheid = stars. The observations were executed as scheduled, and no anomalies = were noted. 1.5 Completed Two Sets of WF/PC-2 6188 (WF/PC-2 Cycle 5 Calibration: = Dark) The WF/PC-2 was used to make internal dark calibration images. = The observations were completed as scheduled, and no problems were = reported. 1.6 Completed WF/PC-2 6752 (Global Mapping of the Opposition Surge on = the Galilean Satellites) The WF/PC-2 was used to make observations of the planet Jupiter's = moons Callisto, Europa, Io and Ganymede while Jupiter is in opposition. = The brightness at opposition (The opposition effect) is common to solar = system bodies without atmospheres. Differences in surface roughness and = structure affect the amount and phase-angle shape dependence in the = brightening. The observations were executed as scheduled and no = anomalies were noted. 1.7 Completed Two sets of WF/PC-2 6187 (WF/PC-2 Cycle 5 Calibration: = Earth Flat) The WF/PC-2 was used to make Earth streak flat calibration images. = These streak flats will be used to produce flat fields, to map the OTA = illumination pattern and, in combination with other data, to produce new = superflats. The observations were completed as planned, and no problems = were reported. 1.8 Completed GHRS/2 6615 (Fundamental Parameters of White Dwarfs in = Close Binaries) The High Resolution Spectrograph (Side Two) was used to make = spectrographic observations of the close binary system EUVE-J1016 (a = white dwarf/M-dwarf binary system) in order to obtain fundamental paramete= rs of its white dwarf star. As the older star ages through the = asymptotic branch phase, the gaseous envelope which encompasses both = stars dissipates and the white dwarf becomes visible. A wavelength = calibration image was also taken. The observations were executed as = scheduled, and no anomalies were noted. 1.9 Completed WF/PC-2 6352 (Dwarf Eliptical Galaxy Snapshots) The WF/PC-2 was used to survey FCC64, from a sample of 30 dwarf = eliptical galaxies. The observations were completed as planned, and no = anomalies were reported. 1.10 Completed FOS/RD 6925 (FOS Observations of Solar Analog = Standards) The Faint Object Spectrograph (Red Side) was used to make absolute = spectrophotmetry observations of the solar analog star P177D-CAlI in the = spectral range of 2200 A0 to 8500 A0. The objective is to provide the = primary standards for the absolute calibration of the NICMOS. The = observations were completed as scheduled, and no problems were reported. 1.11 Completed GHRS/1/2 6410 (Low Red Shift Lyman Alpha Clouds: ) The High Resolution Spectrograph (Sides One and Two) was used to = make spectrographic observations of the bright QSO-123050 in order to = obtain data on the foreground low redshift Lyman-Alpha clouds. This QSO = is known to be within 0.9 degrees of the known radio galaxy 3C273. The = objective is to help determine whether the low redshift Lyman-Alpha = forest is related to the galaxy or is a truly an intergalactic = phenomenon. A wavelength calibration image was also taken. During this = proposal, the acquisition and re-acquisition difficulties mentioned in = Section 2.1 occurred. Otherwise, the observations were completed as = planned, and no further anomalies were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 5 Successful : 5 As described in HSTAR 5654, the acquisition at 192/2250Z and the = subsequent re-acquisition at 192/0029Z, defaulted to control on FGS #3 = only. Scheduled Reacquisitions : 10 Successful : 10 2.2 FHST Updates: Scheduled : 13 Successful : 13 2.3 Operations Notes: Commercial power was out during a storm at STGT. As a result, = real-time data was lost (unrecoverable) for the period 193/001442Z - = 193/001746Z. A TTR was written. The next HLGBU will be uplinked late on day 193 due to a lack of = uplink opportunities. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Nothing at this time. /DMH