HUBBLE SPACE TELESCOPE DAILY REPORT #2274 PERIOD COVERED: 0000Z (UTC) 12/18/98 - 0000Z (UTC) 12/21/98 Daily Status Report as of 355/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Five Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor -- Cont. to Dec. 98) The Space Telescope Imaging Spectrograph (CCD) was used to measure CCD dark current and bias rates for the two supported amplifier settings {GAIN=1 and GAIN=4} in order to gather data for making superdarks and superbiases. The data will be used 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. 1.2 Completed Nine Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental Darks pt3/3) The WF/PC-2 was used to make supplemental dark calibration images. This dark calibration program obtains three dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. The observations were completed as planned, and no anomalies were noted. 1.3 Completed Two Sets of WF/PC-2 7386 (A Snapshot Survey of Nova Shells) The WF/PC-2 was used to make observational images of the super novae shells V960-Sco and V990-Sco in order to detect and measure its expanding gaseous shell. These observations will trace the distribution of hot and cool gas in the nova shells, and show their degree of inhomogeneity on both large and small scales. The observations were completed as scheduled, and no problems were noted. 1.4 Completed Eleven Sets of NIC/1/2/3 8083 (FLATs: Warming Up - continuation) The Near Infrared Camera (Cameras One, Two and Three) was used to monitor the flat fields during the interval between the end of science observations and the exhaustion of cryogen and subsequent warming of the dewar to > 100K. The observations were executed as scheduled, and no anomalies were noted. 1.5 Completed Eleven Sets of WF/PC-2 7377 (Dwarf Elliptical Galaxy Snapshot Survey II) The WF/PC-2 was used to make observations of the dwarf elliptical galaxy VCC1363 as part of Snapshot Survey II. This survey will provide important information on the globular cluster systems of such galaxies and the properties of their cores and nuclei. The loss of lock described in 2.1 and HSTAR 6822 occurred during the ninth iteration of this proposal. Then during the final iteration, the acquisition failure documented in HSTAR 6823 and 2.1 occurred, and the take data flag remained down. Otherwise, the observations were completed as planned, and no further anomalies were reported. 1.6 Completed NineteenSets of STIS/CCD 8062 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation) The Space Telescope Imaging Spectrograph (CCD) was used to make high galactic latitude observations taken in parallel with the prime science observations. During the final iteration of this proposal, the acquisition failure documented in HSTAR 6823 and 2.1 occurred, and the take data flag remained down. Otherwise, the observations were completed as planned, and no further problems were reported. 1.7 Completed Eight Sets of STIS/CCD 8084 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation) The Space Telescope Imaging Spectrograph (CCD) was used to make non-scripted parallel high galactic latitude observations as part of POMS test proposal. The observations were executed as scheduled, and no anomalies were noted. 1.8 Completed Twenty Six Sets of NIC/1/2/3 7963 (Darks: Warming Up) The Near Infrared Camera (Cameras One, Two and Three) was used to monitor the detector dark current during the interval between the end of science observations and the exhaustion of cryogen and subsequent warming of the dewar to > 100K. During the final iteration of this proposal, the acquisition failure documented in HSTAR 6823 and 2.1 occurred, and the take data flag remained down. Otherwise, the observations were completed as planned, and no further anomalies were noted. 1.9 Completed Two Sets of STIS/CCD/MA2 7402 (Chromospheric Activity in Old Stars: Halo Subdwarfs' Variability) The Space Telescope Imaging Spectrograph (CCD and MA2) was used to make observations of the old sub-dwarf stars HD94028 and HD19445 in order to study thier chromospheric activity. All normal stars cool enough to have convection zones share a common minimum level of chromospheric activity which decreases with advancing spectral type; most show higher emission levels which vary with time. A wavelength calibration observation was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.10 Completed Two Sets of WF/PC-2 8061 (POMS Test Proposal: WF-II Backup Parallel Archive Proposal) This is a POMS test proposal designed to simulate scientific plans. The proposal was executed as planned, and no anomalies were reported. 1.11 Completed STIS/MA1 7298 (A Snapshot Survey for UV bright Quasars at redshift below 3) The Space Telescope Imaging Spectrograph (MA1) was used to make ultraviolet snapshot observations of the bright quasar CSO199 which has a redshift (Z) below 3.0. The goal is to find quasars bright enough in the ultraviolet for spectroscopic follow-up in the range of 900-1200 Angstroms. A wave length calibration image was also taken. The observation were completed as scheduled, and no anomalies were reported. 1.12 Completed Two Sets of WF/PC-2 6751 (Is the Central Star of K 648 in M15 a Close Binary?) The WF/PC-2 was used to make observations of the central star of the planetary nebulae K686 and K648 which is located in globular cluster M-15 to determine if this star is a binary star. Pre-repair HST images reveal that the nebula is strongly elliptical in shape, and shows blobs on either side of the central star. The observations were executed as scheduled, and no anomalies were noted. 1.13 Completed NIC/3 7962 (NICMOS Warm-up Focus Monitoring) The Near Infrared Camera (Camera Three) was used to make observations of the globular cluster and nebula of NGC-3603 as part of the NICMOS warm-up focus monitoring. This proposal is used to determine and monitor the optimal focus settings for NIC/2 and NIC/3 during the dewar warm-up period at the end of 1998. The observations were executed as scheduled, and no anomalies were noted. 1.14 Completed NIC/1/2 7514 (HST Observations of Orion -- Probing the Origin of Abundance Anomalies in H II Regions) The WF/PC-2, Near Infrared Camera (Cameras One and Two) and the Space Telescope Imaging Spectrograph (MA1 and MA2) were used to make observations of the H-II region (i.e., NGC-1976) which is within the Orion Nebula (a.k.a., M-42) in order to probe the origin of the abundance anomalies in the nebula. The purpose the of observations is to obtain a set of emission-line diagnostics of the Orion Nebula in its brightest and best-resolved H II region. The observations were completed as scheduled, and no anomalies were reported. 1.15 Completed STIS/CCD 7396 UV Cyclotron Spectroscopy of the High- Field Polar UZ Fornacis The Space Telescope Imaging Spectrograph (CCD) was used to make ultraviolet cyclotron spectroscopy observations of variable star UZ-For. This is a high magnetic field star (i.e., 53 Mega Gauss). The observations were executed as scheduled, and no anomalies were noted. 1.16 Completed NIC/1/2/3 7226 (Search for Massive Jupiters) The Near Infrared Camera (Camera One, Two and Three) was used to make a corographic search for massive planets around the nearby, young main sequence star HD113766. Because of the extreme youth of these objects, any low-mass brown dwarf and planetary companions will still be in a higher luminosity phase and thus easily detectable. A dark calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.17 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. 1.18 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-4458 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. 1.19 Completed WF/PC-2 7282 (A Continuing Snapshot Survey for Compact Stellar Groups and Clusters around Wolf-Rayet Stars) The WF/PC-2 was used to make observations of the Wolf-Rayet star WR16 as part of a continuing snapshot survey of compact stellar groups and clusters. The newly imaged clusters allow us to accurately determine the distances, luminosities, and ages of the WR members. The observations were executed as scheduled, and no anomalies were noted. 1.20 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby Galaxies - Imaging and Spectroscopy) The Space Telescope Imaging Spectrograph (CCD) was used to make parallel observations of nearby galaxies. This survey will be useful to study the star formation histories, chemical evolution, and distances to these galaxies. These data will be placed immediately into the Hubble Data Archive. The observations were completed as scheduled, and no problems were reported. 1.21 Completed STIS/MA1 7345 (Origin and Physical Conditions in the Local Lyman-Alpha Forest) The Space Telescope Imaging Spectrograph (MA1) was used to make observations of MR2251-178 in order to study the origin and physical conditions in the local Lyman-Alpha forest. A wavelength calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.22 Completed Three Sets of NIC/2/3 8063 (NICMOS Pure Parallel Sponge - Backup) The Near Infrared Camera (Cameras Two and Three) was used to make observations taken in parallel with the prime science observations. This proposal is PRE-the new FOM default. The observations were executed as scheduled, and no anomalies were noted. 1.23 Completed STIS/CCD/MA2 7614 (C and N Production and Pollution Mechanisms in Low-Metallicity Extragalactic H-II Regions - Part 2) The Space Telescope Imaging Spectrograph (CCD and MA2) was used to make ultraviolet spectroscopic observations of star dwarf galaxy T1304-386. A wavelength calibration image was also taken. The observations were completed as planned, and no problems were reported. 1.24 Completed STIS/CCD 8066 (IR Standards: HZ43 Repeat) The Space Telescope Imaging Spectrograph (CCD) was used to make infrared observations of HZ43. Only a few calibrations measurements exist, more data are needed, especially in G230LB, which has no data at all. A wavelength calibration image was also taken. The observations were completed as planned, and no anomalies were reported. 1.25 Completed WF/PC-2/STIS/CCD/MA1/MA2 7585 (Effects of Activity on Stellar Atmospheres) The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) were used to make observations of the stellar atmosphere of star HD115617. These data will be compared with spatially-resolved spectra of active and quiet solar features recorded at wavelengths between 110 nm and 160 nm with the SUMER instrument on SOHO. A wavelength calibration image was also taken. The observations were completed as planned, and no problems were reported. 1.26 Completed WF/PC-2 6675 (The Evolution of Galaxies in Groups) The WF/PC-2 was used to make observations of the radio galaxy 5C6.124. There is now convincing evidence that galaxy evolution has progressed as a strong function of the environment. The strongest evolution is seen in the cores of rich clusters. The observations were completed as planned, and no anomalies were reported. 1.27 Completed STIS/CCD 7361 (The Nature of Nuclear Activity in Nearby Galaxies) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of the nuclear region of galaxy N4596. The high resolution spectra will be used to search for broad components in H-Alpha and for velocity gradients, indicative of gas rotation or other ordered motions. A wavelength calibration observation was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.28 Completed WF/PC-2 7387 (T-Tauri Star Snapshot Survey) The WF/PC-2 was used to make observations of the star TW-Hya as part of a T-Tauri class star survey. The observations were executed as scheduled, and no anomalies were noted. 1.29 Completed WF/PC-2 6772 (Dust Properties in the Beta Pictoris) The WF/PC-2 was used to make observations of the edge-on dust disk around HD39060 (a.k.a., Beta Pictorius). Multicolor imaging polarimetry is an excellent diagnostic of dust grain properties and scattering geometries. The observations were completed as planned, and no anomalies were reported. 1.30 Completed NIC/2/3 8082 (NICMOS Pure Parallel Fall 98) The Near Infrared Camera (Cameras Two and Three) was used to make pure parallel observations while another instrument is prime. The observations were executed as scheduled, and no anomalies were noted. 2.0 FLIGHT OPERATIONS SUMMARY 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 29 Successful : 28 A loss of lock occurred at 354/012748Z while guiding in FGS-3. FGS-3 successfully re-acquired on the first attempt, and the take data flag was again raised. HSTAR 6822 was written. The proposal described in 1.5 was affected. As documented in HSTAR 6823, the acquisition at 354/040050Z failed due to a stop flag on FGS-1. A map subsequently taken showed good spacecraft attitude. The proposals described in 1.5, 1.6, and 1.8 were affected. Scheduled Reacquisitions : 19 Successful : 19 2.2 FHST Updates: Scheduled : 56 Successful : 56 2.3 Operations Notes: Using ROP SR-1, the SSR EDAC error counter was cleared eight times. Two TTRs were written to document missing minor frames at 352/1257Z and at 352/1515Z. A TTR was written for a 4-minute, 3-second data loss beginning at 352/1520Z due to a TTAC time-out. White Sands sent a GCMR to restore data. FHST performance data was collected at 352/1511Z. Per HSTAR 6821, there was a NICMOS EDAC single bit error at 353/062556Z. The NICMOS internal log was dumped and the ground system limit was accordingly adjusted. The NSSC-1 status buffer was dumped at 355/0942Z per ROP NS-3. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH