HUBBLE SPACE TELESCOPE DAILY REPORT #2382 PERIOD COVERED: 0000Z (UTC) 05/27/99 - 0000Z (UTC) 05/28/99 Daily Status Report as of 148/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed STIS/CCD/MA1 7437 (Understanding High-Redshift and Starburst Galaxies: A UV Spectroscopic Survey of O-Stars in the SMC) The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make ultraviolet spectrographic observations of galaxy AV80. The data from this survey, of importance in many areas of astrophysics, will immediately be made public as no proprietary period is requested. A wavelength calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.2 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, and no anomalies were noted. 1.3 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor) The WF/PC-2 was used to make a set of Cycle 7 internal monitoring calibration measurements. A variety of internal exposures are obtained in order to provide a monitor of the integrity of the CCD camera electronics in both bays {gain 7 and gain 15}, a test for quantum efficiency in the CCDs, and a monitor for possible buildup of contaminants on the CCD windows. A bias calibration and an internal flat calibration image were also taken. The observations were executed as scheduled, and no anomalies were noted. 1.4 Completed STIS/CCD/MA1 7760 (UV Spectroscopy of the Luminous Cooling Flow Nebula in A2597) The Space Telescope Imaging Spectrograph (CCD, and MA1) was used to make ultraviolet emission line spectrographic observations of the luminous cooling flow Nebula Abell 2597. These observations will provide the first detection of ultraviolet lines {other than Lyman-Alpha which was detected by IUE} in the spectrum of a cooling flow nebula. A wavelength calibration image was also taken. As described in yesterday's report and HSTAR 7149, there was a loss of lock near the beginning of this proposal when the take data flag went down tempororily. Otherwise, the observations were executed as scheduled, and no further anomalies were noted. 1.5 Completed Three Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II Parallel Archive Proposal Continuation) The WF/PC-2 was used in the parallel mode to make some low galactic latitude archive observations. The program will be used to take parallel images of random areas of the sky. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed Two Sets of STIS/CCD 7949 (CCD Dark and Bias Monitor -- Cont. to June 99) The Space Telescope Imaging Spectrograph (CCD) was used to conduct a CCD dark calibration and a bias monitoring program. It was also scheduled to track the growth of hot pixels on the CCD in general and within the various target acquisition apertures specifically. The observations were executed as scheduled, and no anomalies were noted. 1.7 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 WD1123+183 in the far ultraviolet. A wave length calibration image was also taken. The observations were completed as planned, and no anomalies were reported. 1.8 Completed Two Sets of WF/PC-2 8053 (WF/PC-2 Cycle-7 Earth Flats -- Part II) The WF/PC-2 was used to take Earth flat calibration images. This proposal obtains sequences of Earth streak flats to construct high quality flat fields for the WF/PC-2 filter set. The observations were executed as scheduled, and no anomalies were noted. 1.9 Completed STIS/CCD 8187 (STIS Imaging of the Deep NICMOS Parallel Fields: Building on the NICMOS Legacy) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of field #1143 which were previously observed using deep images from the NICMOS camera. The STIS images will yield visual morphologies to magnitudes of 24.5 and quantitative measures of image structure to 26.5 or fainter in two orbits. The observations were completed as planned, and no problems were reported. 1.10 Completed WF/PC-2 8436 (POMS Test Proposal: WFII Backup Parallel Archive Proposal II) The WF/PC-2 was used to make archive observations parallel to the prime science observations as part of a POMS test proposal. This is a POMS test proposal designed to simulate scientific plans. The observations were completed as planned, and no anomalies were reported. 1.11 Completed WF/PC-2 6579 (The Cosmic Velocity of the Great Attractor) The WF/PC-2 was used to make observations of the galaxy NGC-6876 which is located in the Centaurus Cluster. The objective is to measure its distance, using the "surface brightness fluctuation" method. When combined with the radial velocity, these measurements will allow the investigator to determine whether the Centaurus Cluster is falling in to the Great Attractor. The observations were executed as scheduled, and no anomalies were noted. 1.12 Completed Two Sets of STIS/CCD 8406 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation V) The Space Telescope Imaging Spectrograph (CCD) was used to make high galactic latitude observations taken in parallel with the prime science observations as part of a POMS proposal. This is a STIS non-scripted parallel Condition V proposal. The observations were completed as scheduled, and no anomalies were reported. 1.13 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-6876 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. 1.14 Completed Two Sets of STIS/CCD/MA1 7270 (The Origin of Highly Ionized Gas in the Milky Way and Its Relationship To Large Galactic Structures) The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make spectrographic observations of the star HD177989 in order to study the origin of highly ionized gas in the Milky Way and its relationship to large galactic structures. A wavelength calibration image was also taken. The observations were completed as scheduled, and no anomalies were reported. 2.0 FLIGHT OPERATIONS SUMMARY 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 6 Successful : 6 Scheduled Reacquisitions : 10 Successful : 10 2.2 FHST Updates: Scheduled : 14 Successful : 14 2.3 Operations Notes: The operations team remains in the SAMS back-up facility, using the PRS ground system. The SSR EDAC error counter was cleared four times per ROP SR-1. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH