HUBBLE SPACE TELESCOPE DAILY REPORT #1749 PERIOD COVERED: 0000Z (UTC) 10/29/96 - 0000Z (UTC) 10/30/96 Daily Status Report as of 304/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed WF/PC-2 6354 (Measuring Luminosity Evolution in Z=3D0.3 = Field Galaxies) The WF/PC-2 was used to make snapshot observations of the galactic = cluster Gal-Cluster-1 (Object HD2665) located at a distance of Z=3D0.3. = The targets were drawn from a much larger pool of galaxies for which the = internal kinematics have been measured from an extensive ground based = program. The observations were executed as scheduled, and no anomalies = were noted. 1.2 Completed WF/PC-2 6359 (Core Properties of the Bulges of Spiral = Galaxies) The WF/PC-2 was used to make snapshot survey observations of = spiral galaxy ESO548G10 in order to study its central bulge. The aim is = to investigate the core properties, correlations with global galactic = properties, and the frequency of occurrence of multiple and/or = miscentered nuclei. The observations were completed as scheduled, and no = anomalies were noted. 1.3 Completed 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 object MSO0331.3-3 in order to study its environment and its host = galaxy. 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. 1.4 Completed WF/PC-2 6733 (Spatially Resolved Mapping of Titan's = Atmosphere ) The WF/PC-2 was used to make observations at several different = wavelengths of the atmosphere on Saturn's largest moon Titan as part of a = spatially resolved mapping program. Methane gas and organic aerosols are = the major contributor to the atmosphere's opacity. The observations were = completed as planned, and no anomalies were reported. 1.5 Completed WF/PC-2 6909 (WF/PC-2 Cycle 6 Calibration: Earth Flats) The WF/PC-2 was used to make observations of the bright Earth to = obtain streak flats which are used to construct high quality flat fields = for the WF/PC-2 filter set. The observations were executed as scheduled, = and no anomalies were noted. 1.6 Completed WF/PC-2 5958 (HST Observations of New Gravitational Lens = Candidates) The WF/PC-2 was used to make observations of object H0449-1645 = which is a candidate for a new gravitational lens system. The = observations were completed as planned, and no problems were reported. 1.7 Completed FOC/48 6308 (Long Slit Spectroscopy of the Narrow Line = Region of Seyfert Galaxies) The Faint Object Camera (f/48) was used to make long slit = spectrographic observations of the narrow line region of Seyfert galaxy = MRK-573. The slit was placed at several different positions across the = nuclear region of the target. An internal flat and a dark calibration = image were also taken. The observations were executed as scheduled, and = no anomalies were reported. 1.8 Completed 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. 1.9 Completed FOS/RD 6548 (The Cool Interstellar Medium in Hot Cluster = of Galaxies) The Faint Object Spectrograph (Red Side) was used to make = ultraviolet resonance absorption line observations of quasar QSO0909-09 = in order to study the cool interstellar medium within a cluster of = galaxies which lie within the line of sight to the quasar. The QSO is = being used a probe of the galactic cluster. The observations were = executed as scheduled, and no anomalies were noted. 1.10 Completed WF/PC-2 7203 (Cosmology with the Medium Deep Survey - = Short Orbit Cases) The WF/PC-2 was used to take short (about 20 minute) exposures, to = be taken in parallel with the prime science observations, using the I = filter. These exposures are part of the medium-deep survey, which = emphasizes exposures that will be useful in obtaining cosmological = parameters. The observations were completed as planned, and no problems = were reported. 1.11 Completed GHRS/2 6504 (Cepheid Masses) The High Resolution Spectrograph (Side Two) was used to make = observations of the binary Cepheid variable star HD156979 in order to = measure its mass. The luminosity of a Cepheid with a given mass depends = sensitively on the amount of excess mixing above the core of the main = sequence progenitor star. A wavelength calibration image was also taken. = The acquisition for this proposal failed to fine lock as described in = HSTAR 5767. Otherwise, the observations executed as scheduled with no = further anomalies noted. 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 10 Successful : 6 Scheduled Reacquisitions : 9 Successful : 7 HSTAR 5767 describes an acquisition at 303/233853Z which failed to = fine lock. The acquisition at 304/065318Z failed, and a loss of lock = occurred as documented in HSTAR 5768. Finally, as mentioned in HSTAR = 5769, the acquisitions at 304/011537Z and the re-acquisition at = 304/012105Z as well as the following acquisition and re-acquistion at = 304/025610Z all failed due to a large saved null bias error. Except for = the first of these occurrences, all impacts on science operations will be = reported tomorrow. 2.2 FHST Updates: Scheduled : 13 Successful : 13 2.3 Operations Notes: Real time operations returned to the MOR at 304/0510Z following = the conclusion of JIS #1. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Nothing at this time. /DMH