HUBBLE SPACE TELESCOPE DAILY REPORT #2463 PERIOD COVERED: 0000Z (UTC) 09/22/99 - 0000Z (UTC) 09/23/99 Daily Status Report as of 266/0000Z 1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED: 1.1 Completed WF/PC-2 8443 (WF/PC-2 Cycle-8 Supplemental Darks pt1/3) The WF/PC-2 was used to obtain 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 problems were reported. 1.2 Completed WF/PC-2 8192 (A Snapshot Survey of Probable Nearby Galaxies) The WF/PC-2 was used to make a snapshot survey images of a probable nearby galaxy KK081. The census of galaxies in the Local Volume of space is very incomplete, particularly at the faint end. The observations were executed as scheduled, and no anomalies were noted 1.3 Completed Four 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. 1.4 Completed STIS/CCD 8236 (Black Holes and Gas Disks in a Complete Sample of Radio-Loud Ellipticals - II: Kinematics) The Space Telescope Imaging Spectrograph (CCD) was used to make observations of the radio-loud elliptical galaxy NGC-4335. From these observations we will measure the black hole masses, determine the nature, kinematics, and structure of the central gas disks and obtain a modeled upper limit to their mass accretion rates. A wavelength calibration image was also taken. The observations were completed as planned, and no problems were reported. 1.5 Completed Four 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 high 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 WF/PC-2 7371 (The White Dwarf Luminosity Function in NGC 188) The WF/PC-2 was used to study the white dwarf luminosity function in the old open cluster NGC-188. These data will be one of the first “complete” samples of white dwarfs {in the sense of containing stars from the full cooling sequence} all at a known distance, with similar compositions and derived from a fairly well understood initial mass distribution. The observations were executed as scheduled, and no anomalies were noted. 1.7 Completed WF/PC-2 8230 (Snapshot Survey of Dynamically Close Galaxy Pairs from z=0.1 to z=0.5) The WF/PC-2 was used to make snapshot survey observations of galactic cluster Gal-Clus-0723. This is to obtain snapshot images of a large, well-defined, and dynamically selected sample of close galaxy pairs at moderate redshift. The observations were executed as scheduled, and no anomalies were noted. 1.8 Completed Two Sets of STIS/CCD 8408 (STIS CCD Dark Monitor C8) The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD bias calibration observation. This is to monitor the darks for the STIS CCD. The observations were executed as scheduled, and no anomalies were reported. 1.9 Completed WF/PC-2 6752 (Global Mapping of the Opposition Surge on the Galilean Satellites) The WF/PC-2 was used to make observations of Jupiter’s moons Ganyemede, Io, Europa and Callisto. This is to construct ~200 km resolution global maps of the opposition brightness surge for each of the four Galilean satellites to support and complement Galileo mission science investigations. The observations were executed as scheduled, and no anomalies were noted. 1.10 Completed STIS/CCD 8409 (STIS CCD Bias Monitor C8) The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD bias calibration observation. This is to monitor the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at gain = 4, to build up high-S/N superbiases and to track the evolution of hot columns. The observations were executed as scheduled, and no anomalies were reported. 1.11 Completed Two Sets of STIS/MA1 8426 (Cycle 8 MAMA Dark Measurements) The Space Telescope Imaging Spectrograph (MA1) was used to make a routine Cycle-8 MAMA dark noise calibration measurement. This proposal will provide the primary means of checking on the health of the MAMA detectors. This is done through frequent monitoring of the background count rate. The observations were completed as planned, and no problems were reported. 1.12 Completed STIS/MA1 7353 (Spectra to Constrain the Dynamics of Clouds in the Narrow-Line Region of NGC 1068) The Space Telescope Imaging Spectrograph (MA1) was used to make observations of the narrow line regions in the Seyfert galaxy NGC-1068. The results will provide important constraints on more distant quasars whose emission-line regions are too compact for HST and other high-resolution telescopes to resolve, and which therefore possess far fewer dynamical constraints from other wavebands. A wavelength calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted. 1.13 Completed Three Sets of WF/PC-2 8457 (UV Earthflats) The WF/PC-2 was used to make a ultraviolet Earth flat calibration image. This is to improve the quality of pipeline the ultraviolet flatfields. The observations were completed as scheduled, and no problems were reported. 1.14 Completed STIS/CCD/MA1/MA2 7316 (Saturn's Satellites: Alteration of the Surface by Ion Irradiation on Enceladus and Tethys) > The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used to make observations of Saturns’ moon Tethys and Enceladus. Saturn's medium-sized icy satellites display a diverse range of surface alteration caused by one or more external processes. A wavelength calibration image was also taken. The observations were completed as planned, and no anomalies were noted. 1.15 Completed FGS 8468 (Calibrating FGS1R's Interferometric Response as a Function of Spectral Color) The Fine Guidance Sensor (FGS1R) was used to make observations of star BP-Tau and several other reference stars as part of calibrating FGS1R's interferometric response as a function of spectral color. The purpose of this proposal is to obtain reference transfer functions through various filters at the center positions of the field of view of the FGS1R. The observations were executed as scheduled, and no anomalies were noted. 1.16 Completed STIS/MA1 8431 (Doppler Test of Far UV MAMA with Jenkins Slit) The Space Telescope Imaging Spectrograph (MA1) was used to execute a Doppler test to measure the limiting resolving power of the far-ultraviolet MAMA using the Jenkins 0.100x0.030 slit. The observations were completed as planned, and no anomalies were noted. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions: 12 Successful: 12 Scheduled Re-acquisitions: 6 Successful: 6 2.2 FHST Updates: Scheduled: 24 Successful: 24 2.3 Operations Notes: Using ROP SE-1, the SSR EDAC error counter was cleared twice. There was a STIS EMC retry at 265/1022336Z. The STIS flight software error counter was reset at 265/1049Z. The STIS MCE-1 reset at 266/001143Z while the low voltage was on and while in an SAA interval. The STIS flight software error counter was reset at 266/0034Z per ROP NS-12. MAMA-1 will be recovered via normal SMS commanding at 267/1958Z, the time of the next high voltage on event. Per HSTAR 7276, beginning at 266/064249Z and lasting for 12 seconds, the battery 3 current flagged out-of-limits high with a value of 17.1999. The values for the parameter both before and after the event were in the 12-13 range. During the period, the HST was approaching a transition from orbit night to orbit day. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH