HUBBLE SPACE TELESCOPE DAILY REPORT #2186 PERIOD COVERED: 0000Z (UTC) 08/12/98 - 0000Z (UTC) 08/13/98 Daily Status Report as of 225/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Three Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental Darks pt2/3) The WF/PC-2 was used to make a series of Cycle 7 supplemental calibration darks. 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 executed as scheduled, and no anomalies were noted. 1.2 Completed Two 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. 1.3 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 S5-0836-71 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 900 -- 1200 Angstroms. A wave length calibration image was also taken. The observation were completed as scheduled, and no anomalies were reported. 1.4 Completed Three Sets of NIC/1/2/3 7596 (NICMOS MULTIACCUM Dark Characterization) The Near-Infrared Camera Multi-Object Spectrograph (Cameras One, Two and Three) was used to make a NICMOS MULTIACCUM dark characterization. The purpose of this proposal is to monitor the darks using three different MULTIACCUM sequences. The observations were executed as scheduled, and no anomalies were noted. 1.5 Completed Four Sets of WF/PC-2/NIC/1/2 7324 (Multispectral Investigation of Dynamics and Cloud Structure on Neptune) The WF/PC-2 and the Near Infrared Camera (Cameras #1 and #2) were used to make multispectral observations of the dynamics and cloud structure of the planet Neptune. This is to investigate the time dependent vertical structure and spatial distribution of its isolated cloud features and zonal bands, the form and stability of its mean circulation, the evolution of known features, and the possible development of major new features such as great dark spots or outbursts. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed NIC/2 7227 (A Search for Low Mass/Sub-Luminous Companions to M-Stars) The Near Infrared Camera (Camera Two) was used to make a search for low mass/sub-luminous companions to the low mass M class stars LP390-16 and GL752B. Knowledge of stellar and sub-stellar masses and luminosities at and below the ~0.08 M{sun} H-burning limit is of fundamental importance. A dark calibration image was also taken. The observations were completed as planned, and no problems were reported. 1.7 Completed Four Sets 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 take in parallel with the prime science observations. The observations were completed as planned, and no problems were reported. 1.8 Completed WF/PC-2 6681 (Evolution of Pre-Main Sequence Circumstellar Nebulosity) The WF/PC-2 was used to make observations of V892-Tau to study the evolution of the pre-main sequence circumstellar nebulosity V1121-OPH. Initial HST results from imaging of disks around pre-main sequence stars provide compelling justification to observe a broader sample of young stars. The observations were completed as planned, and no anomalies were reported. 1.9 Completed Two Sets of NIC/2/3 8063 (NICMOS Pure Parallel Sponge - Backup) The Near Infrared Camera ( Cameras #2 and #3) 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. 1.10 Completed WF/PC-2 6506 (High Resolution Imaging of Young Stellar Objects in Serpens) The WF/PC-2 was used to make high resolution observations of young stellar objects in the constellation of Serpens. Optical and Near Infrared Imaging of nearby Young Stellar Objects at high spatial resolution is beginning to reveal their circumstellar structures on the scale of the solar system. The observations were completed as planned, and no problems were reported. 1.11 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section Only): Cycle 4) This proposal was executed as scheduled, and no anomalies were noted. 1.12 Completed NIC/2 7226 (Search for Massive Jupiters) The Near Infrared Camera (Camera Two) was used to make a corographic search for massive planets around nearby, young main sequence stars. 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. 1.13 Completed NIC/1/2 7416 (Infrared Imaging of the Dust Shell Structures of the Mira Stars o Ceti and R Leo) The Near Infrared Camera (Cameras One and Two) was used to make observations of the Mira Class stars HD-30652 and HD97603 (a.k.a., o Ceti and R Leo). Due to their mass loss, the Mira-type variables are surrounded by expanding shells composed of gas and dust. The observations were completed as planned, and no anomalies were noted. 1.14 Completed NIC/1/2/3 7218 (Nearby Starburst Galaxies) The Near Infrared Camera (Cameras One and Two) was used to make observations of the nearby starbursting galaxy NGC-253. This proposal encompasses a study of both the stars and interstellar material in starburst nuclei which will test ideas about the triggering of starbursts and whether starbursts propagate outwards in a nucleus. The observations were completed as planned, and no anomalies were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 8 Successful : 8 Scheduled Reacquisitions : 9 Successful : 9 2.2 FHST Updates: Scheduled : 14 Successful : 14 2.3 Operations Notes: There was a NICMOS EDAC Single Bit Error Count (NSBITERR) which transitioned from a value of 1 (refer to HSTAR 6611) to a value of 2 at 224/2245Z. This is not an OOL condition and does not generate a status buffer error. The MOSES SI SE was notified. The Error log was dumped and the limit was changes to High = 2 per OR 13807. (HSTAR 6621 was written). The ESTR2 was cnfigured at 224/1228Z to record engineering data during the IP testing event (OR13949). The NICMOS Internal Log was dumped and the limit was adjusted for the NICMOS EDAC Single Bit Error Count (NSBITERR) at 224/2328Z (OR13807). (See HSTAR 6621) The SSR EDAC Error Counter was cleared at 224/1349Z and 225/0107Z (ROP SR-1). CCS Strings "A" and "B" were configured to collect the DF-224 memory dump at 224/1628Z. The LOR playback was completed at 225/0700Z to recover the 32 kbps engineering data for period 220/01227Z through 0132Z. 3.0 SIGNIFICANT FORTHCOMING EVENTS: The IP Event on TDRS-West will occur from 225/1401Z through 1452Z WSGTU. During the event, the STOCC will lock on 4 kbps telemetry and send NOOP/FIVEBLK commands. The HST will be commanded to the 4 kbps telemetry format on a prior TDRSS event, using legacy PRS, and will be commanded back to 32 KBPS telemetry format at the start of the following TDRSS event, using legacy PRS. Continuation of normal science observations and calibrations. /DMH