HUBBLE SPACE TELESCOPE DAILY REPORT #2840 PERIOD COVERED: 0000Z (UTC) 03/29/01 - 0000Z (UTC) 03/30/01 Daily Status Report as of 089/0000Z 1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED: 1.1 Completed WF/PC-2 8632 (A UV Atlas of Nearby Galaxies) The WF/PC-2 was used to perform a snapshot survey of local galaxies at UV wavelengths with the F300W filter. The aim of the project is to build a reference UV Atlas of normal galaxies, whose optical images are well known, with the highest possible degree of information, covering all the morphological types and luminosity classes. The proposal completed normally. 1.2 Completed Two Sets of STIS/CCD 8864 (CCD Dark Monitor-Part 2) The Space Telescope Imaging Spectrograph (CCD) was used to monitor the darks for the CCD. The proposal completed nominally. 1.3 Completed Four Sets of WF/PC-2 8827 (Cycle 9 Supplemental Darks pt2/3) 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 proposal completed nominally. 1.4 Completed STIS/CCD 8865 (Bias Monitor-Part 2) The Space Telescope Imaging Spectrograph (CCD) was used 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 track the evolution of hot columns. The proposal completed with no anomalous activity. 1.5 Completed Three Sets of WF/PC-2 8632 (A UV Atlas of Nearby Galaxies) The WF/PC-2 was used to perform a snapshot survey of local galaxies at UV wavelengths with the F300W filter. The aim of the project is to build a reference UV Atlas of normal galaxies, whose optical images are well known, with the highest possible degree of information, covering all the morphological types and luminosity classes. The proposal completed normally. 1.6 Completed Six Sets of STIS/CCD 9248 (Probing the Large Scale Structure: Cosmic Shear Observations) The Space Telescope Imaging Spectrograph (CCD) was used to measure the distortion of light bundles from distant galaxies that probe the statistical properties of the intervening inhomogeneous {dark} matter distribution. Its tidal gravitational field distorts the observable image shapes thereby causing a coherent ellipticity pattern {Cosmic Shear}. The observations completed nominally. 1.7 Completed STIS/MA1 8650 (The Interplanetary Medium Hydrogen Velocity Distribution) The Space Telescope Imaging Spectrograph (MA1) was used to observe the neutral atoms from the interstellar medium {ISM} flow into the solar system which produce a diffuse emission at 1216 Angstrom by resonant scattering of solar H Ly-alpha emission. This wind contains the velocity distribution of the local ISM, plus modifications by solar gravity, radiation pressure, and ionization near the Sun, and the Ly-alpha emission line profile reveals these velocity signatures. The observations completed nominally, with no reported problems. 1.8 Completed WF/PC-2 9244 (POMS Test Proposal: WFII Parallel Archive Proposal Continuation) The WF/PC-2 was used to perform a generic target version of the Archival Pure Parallel program. The program will be used to take parallel images of random areas of the sky, following the recommendations of the Parallels Working Group. The observations completed with no anomalous activity. 1.9 Completed Two Sets of STIS/MA1 8862 (FUV-MAMA Cycle 9 Flats) The Space Telescope Imaging Spectrograph (MA1) was used to obtain FUV-MAMA observations of the internal Krypton lamp to construct an FUV flat applicable to all FUV modes. No problems were encountered. 1.10 Completed Three Sets of WF/PC-2 8699 (The Origin of Short-Period Comets) The WF/PC-2 was used to detect and characterize cometary nuclei in order to determine the basic physical properties of a large fraction of the population of short-period comets. By acquiring statistically significant data, we can study the origin of this family of comets and test the hypothesis that they are collisional fragments from the Kuiper Belt Objects. The observations completed with no reported problems. 1.11 Completed STIS/MA2 8863 (NUV-MAMA Cycle 9 Flats) The Space Telescope Imaging Spectrograph (MA2) was used to obtain NUV-MAMA observations of the internal Deuterium lamp to construct an NUV flat applicable to all NUV modes. There were no reported problems. 1.12 Completed Two Sets of WF/PC-2 8683 (Imaging Of Brightest Cluster Galaxies: The High End Of The Black Hole Mass Distribution) The WF/PC-2 was used to make kinematic black hole detections in galaxies to decide whether they indicate that the mass correlates with both optical luminosity and radio power. The observation completed with no reported problems. 1.13 Completed WF/PC-2 8720 (Masses and Multiplicity of Nearby Free- floating Methane and L Dwarfs) The WF/PC-2 was used to observe 50 very-low-mass objects in the solar neighborhood with spectral types of L0 and later {including several dwarfs with Methane absorption bands in their atmospheres}. These objects will be observed in two filter bands with the aim to identify close companions, measure their colors, and to obtain first epoch data of the newly discovered binaries. The observations completed nominally. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions: 12 Successful: 12 Scheduled Re-acquisitions: 0 Successful: 0 2.2 FHST Updates: Scheduled: 18 Successful: 18 2.3 Operations Notes: Using ROP SR-1A, the SSR EDAC error counter was cleared twice. A series of special pointing slews to the Comet Kojima were generated at 088/1500Z to support the third iteration of the proposal detailed in 1.10. Per HSTAR 8140, at 089/034701Z, a STIS status buffer message was received, indicating that an MIE second event threshold had been exceeded. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /CAW