HUBBLE SPACE TELESCOPE DAILY REPORT #1965 PERIOD COVERED: 0000Z (UTC) 09/17/97 - 0000Z (UTC) 09/18/97 Daily Status Report as of 261/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 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 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. 1.2 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. 1.3 Completed FGS 6768 (Continuation of an Astrometric Search For Planetary Companions to Proxima-Cen) The FGS were used to make astrometric observations of the star Proxima-Cen and several other reference stars. Excluding our Sun, this is the next closest star to the planet Earth at just over four light years away. These data will be combined with data from previous cycles and analysis will be done looking for any indications of a planetary companion. The observations were executed as scheduled, and no anomalies were noted. 1.4 Completed Four Sets of STIS/CCD 7781 (STIS Non-Scripted Parallel Archive Proposal - Full Orbit) The Space Telescope Imaging Spectrograph (MA2) was used for a non-scripted parallel archive proposal (one full orbit). The observations were executed as scheduled with no anomalies. 1.5 Completed Three Sets of NIC/1/2/3 7726 (NICMOS One Orbit Parallel) The Near Infrared Camera (Cameras One, Two and Three) was used to make one orbit parallel calibration observations. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed Two Sets of STIS/CCD 7125 (CCD Coronographic Imaging of the Disk of Beta Pictoris) The Space Telescope Imaging Spectrograph (CCD) was used to make high resolution coronographic imaging of the inner section of the edge-on disk surrounding the star HD39060 (a.k.a., Beta Pictoris). The observations were completed as scheduled, and no anomalies were noted. 1.7 Completed Four Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats) The WF/PC-2 was used to make a series of Earth flat calibration images. These flat fields will allow mapping of the OTA illumination pattern and will be used in conjunction with previous internal and external flats to generate new pipeline superflats. The observations were completed as planned, and no anomalies were reported. 1.8 Completed Five Sets of WF/PC-2 7623 (WF/PC-2 Cycle 7 Internal Flats) The WF/PC-2 was used to make a set of internal Cycle 7 calibration flats which are designed to monitor the pixel to pixel flat field response and the visflat lamp degradation, as well as detect any possible changes due to contamination. The calibration observations were completed as planned, and no problems were reported. 1.9 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass Companions to Stars Within 10 Parsecs of the Sun) The Near Infrared Camera (Camera Two) was used to make searching observations for very low mass companions to variable star FI-Vir. This star is known to be within 10 parsecs of the Sun. The observations were executed as scheduled, and no anomalies were noted. 1.10 Completed WF/PC-2 7618 (WF/PC-2 Cycle 7 Photometric Monitor UV/OPT STD) The WF/PC-2 was used to make observations of the standard star GRW+70D582 as part of a Cycle 7 photometric monitoring program. This ultraviolet spectrophotometric standard star was observed in a variety of filters and cameras to monitor the photometric stability and quantum efficiency of WF/PC-2 from the far-ultraviolet to near-infrared. The observations were completed as scheduled, and no problems were reported. 1.11 Completed NIC/1/2/3 7412 (An HST/NICMOS Search for Young Brown Dwarfs and Giant Planets) The Near Infrared Camera (Cameras One, Two and Three) was used to make observations taken in parallel with the prime science observations to be part of a survey to look for large planets and/or small brown dwarf stars which are in orbit around T-Tauri class star RXJ16043-2. At an age of 2 to 20 million years these low-mass companions will be considerably brighter than more evolved brown dwarfs or giant planets orbiting main-sequence stars, and hence will be much easier to detect. The observations were completed as planned, and no anomalies were noted. 1.12 Completed STIS/CCD 7782 (STIS Non-Scripted Parallel Archive Proposal - Half Orbit) The Space Telescope Imaging Spectrograph (CCD) was used for a non-scripted parallel archive proposal (one-half orbit). The observations were executed as scheduled with no anomalies. 1.13 Completed STIS/CCD 7783 (STIS Parallel Science) The Space Telescope Imaging Spectrograph (CCD) was used to make observations taken in parallel with the prime science. The observations were completed, and no problems were reported. 1.14 Completed NIC/2 7330 (The Fueling of Active Nucleii: A NICMOS Snapshot Survey) The Near Infrared Camera (Camera Two) was used to probe the dark matter distribution of NGC-5128, far from the center, by observing intervening absorption from the MgII doublet (lambda 2800) in the spectrum of one background QSO located in a geometrically optimal position. HST observations are required because this feature is in a wavelength range not accessible from the ground, and the QSO magnitudes and expected strength of absorption make IUE observations unfeasible. The proposal completed as expected with no anomalies. 1.15 Completed WF/PC-2 NIC/2 7445 (Study of Jovian Dynamics by Combining Global and Temporal HST Observations with Galileo Data) The WF/PC-2 was used to make observations of the planet Jupiter in order to study its dynamics. Due to Galileo's limited data rate and the small imaging field of view, HST has become vital in understanding the global perspective of this data. Per HSTAR 6170, the initial acquisition for this proposal defaulted to fine lock on FGS-3 at 260/131409Z only when the scan steps being exceeded on FGS-1. No further anomalies were noted. 1.16 Completed STIS/MA2 7644 (STIS NUV-MAMA Monitoring Flats) The Space Telescope Imaging Spectrograph (MA2) was used to obtain near Ultraviolet-MAMA flat-field observations for the construction of bi-monthly delta-flats. The acquisition default mentioned in 1.15 also affected this proposal. The observations were completed as planned, and no further problems were reported. 1.17 Completed STIS/MA1 7728 (STIS FUV-MAMA Monitoring Flats) The Space Telescope Imaging Spectrograph (MA1) was used for the STIS MAMA flat monitoring program. This program will obtain far-ultraviolet-MAMA flat-field observations for the construction of Delta-flats for select modes. The observations were completed as planned, and no anomalies were reported. 1.18 Completed WF/PC-2 6431 (Determination of the Extragalactric Distance Scale) The WF/PC-2 was used to make observations of the galaxy NGC-1326 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. 1.19 Completed Two Sets of NIC/1/2/3 7729 (NICMOS Short One Orbit Parallel) The Near Infrared Camera (Cameras One, Two, and Three) was used to obtain "JHK" imaging of sky regions while another instrument was prime. These observations were part of the short NICMOS one-orbit parallel program. The observations were executed as scheduled, and no anomalies were noted. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 7 Successful : 7 One acquisition defaulted to fine lock on one FGS only. See 1.15 and 1.16 for further details. Scheduled Reacquisitions : 9 Successful : 9 2.2 FHST Updates: Scheduled : 18 Successful : 18 2.3 Operations Notes: The proposal described in 1.6 is an Early Release Observation. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH