HUBBLE SPACE TELESCOPE DAILY REPORT #2954 PERIOD COVERED: 0000Z (UTC) 09/10/01 - 0000Z (UTC) 09/11/01 Daily Status Report as of 254/0000Z 1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED: 1.1 Completed Two Sets of STIS/CCD 8901 (Dark Monitor-Part 1) The Space Telescope Imaging Spectrograph (CCD) was used to monitor the darks. There was no anomalous activity. 1.2 Completed Three Sets of WF/PC-2 8936 (Cycle 10 Supplemental Darks Pt1/3) The WF/PC-2 was used to perform a dark calibration program that obtains three dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. The proposal completed with no reported problems. 1.3 Completed WF/PC-2 9124 (Mid-UV SNAPSHOT Survey of Nearby Irregulars: Galaxy Structure and Evolution Benchmark) The WF/PC-2 was used to investigate the relation between star formation and the global physical characteristics of galaxies to interpret the morphologies of distant galaxies in terms of their evolutionary status. Distant galaxies are primarily observed in their rest frame mid-ultraviolet. They resemble nearby late-type galaxies, but are they really physically similar classes of objects? It is proposed to address this question through a SNAPSHOT survey in the 2 mid-UV filter F300W of 98 nearby late-type, irregular and peculiar galaxies. No problems were reported. 1.4 Completed STIS/CCD/MA1/MA2 8919 (MAMA Sensitivity and Focus Monitor C10) The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used to monitor the sensitivity of each MAMA grating mode to detect any change due to contamination or other causes, and also to monitor the STIS focus in a spectroscopic and an imaging mode. All observations were successful. 1.5 Completed Six Sets of WF/PC-2 8935 (Cycle 10 Standard Darks) The WF/PC-2 was used to obtain dark frames every week in order to provide data for the ongoing calibration of the CCD dark current rate, and to monitor and characterize the evolution of hot pixels. Over an extended period these data will also provide a monitor of radiation damage to the CCDs. The proposal completed with no reported problems. 1.6 Completed STIS/CCD 8903 (Bias Monitor - Part 1) 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. There were no problems. 1.7 Completed WF/PC-2/STIS/CCD 9174 (Using Optically Faint Radio Sources to Pinpoint Dusty Proto-Galaxies) The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used to observe a number of high redshift, dusty starburst galaxies that remain invisible in ground based in the Hubble Deep Field. These galaxies appear as faint radio sources with bright submillimeter counterparts, demonstrating they are very dusty systems. The luminosities of these galaxies suggest they are in the process of converting the bulk of their gas mass into stars, and will likely evolve into present day massive ellipticals. The observations completed normally, with no reported problems. 1.8 Completed Four Sets of WF/PC-2 8815 (Cycle 9 Earth Flats) The WF/PC-2 was used to monitor flatfield stability. This proposal obtains sequences of Earth streak flats to construct high quality flat fields for the WF/PC-2 filter set. 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 proposal completed nominally. 1.9 Completed WF/PC-2 8939 (Cycle 10 Internal Monitor) The WF/PC-2 was used to calibrate the internal monitor, to be run weekly to monitor the health of the cameras. No problems were encountered. 1.10 Completed STIS/CCD 8669 (Merger-Driven Evolution Of Galactic Nuclei: Observations Of The Toomre Sequence) The Space Telescope Imaging Spectrograph (CCD) was used to observe galaxy mergers that are believed responsible for triggering starburst and AGN activity in galaxies, and even perhaps transforming spiral galaxies into ellipticals. The proposal completed nominally. 1.11 Completed Two Sets of 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. 1.12 Completed WF/PC-2 9259 (Astrometry and Photometry of the binary TNO 1998 WW31) The WF/PC-2 was used to confirm the discovery that the Trans Neptunian Object {TNO} 1998 WW31 has a satellite. Observations of this object would be of immense public interest. Combining images taken at separate epochs would afford an opportunity to derive the orbit and physical parameters of this system. The observations completed nominally. 1.13 Completed STIS/CCD/MA1 8622 (The Interstellar Isotopic Ratio of Boron toward Omicron Persei and Nearby Sight Lines) The Space Telescope Imaging Spectrograph (CCD and MA1) was used to determine the isotopic ratio 11B/10B for diffuse interstellar material along lines of sight to o Persei, 40 Persei, Zeta Persei, and X Persei that pass close to the star- forming region IC 348. The proposal completed nominally. 1.14 Completed Two Sets of STIS/MA1/MA2 8843 (Cycle 9 MAMA Dark Measurements) The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to perform the routine monitoring of the MAMA detector dark noise. The proposal completed nominally. 1.15 Completed STIS/CCD 9066 (Closing in on the Hydrogen Reionization Edge of the Universe) The Space Telescope Imaging Spectrograph (CCD) was used in parallel constrain the Hydrogen reionization edge in emission that marks the transition from a neutral to a fully ionized IGM at a predicted redshifts. The proposal completed uneventfully. 1.16 Completed WF/PC-2 9155 (The Cepheid Distance to NGC 1637: A Direct Comparison with the EPM Distance to SN 1999em) The WF/PC-2 was used to directly compare distances estimated by two primary extragalactic distance indicators. T he appearance of supernova 1999em, a bright, extremely well- observed type II plateau event in the nearby SBc galaxy NGC 1637 offers the best chance to test the consistency of the Expanding Photosphere Method {EPM} of supernova distance determination with that derived from Cepheid variable stars. Although EPM distances have been measured to 18 type II supernovae out to 180 Mpc and used to determine Hubble's constant independent of the Cepheid distance, there have never been any measurements of Cepheids in a galaxy that has hosted a normal type II-P supernova, the classic variety of core-collapse event to which EPM-derived distances are most robust. The proposal completed nominally. 1.17 Completed STIS/CCD 9285 (POMS Test Proposal: STIS Non-scripted Parallel Proposal Continuation III) The Space Telescope Imaging Spectrograph (CCD) was used to make low galactic latitude, non-scripted parallel observations as part of a POMS test proposal. The observations were completed as planned, and no anomalies were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions: 9 Successful: 9 Scheduled Re-acquisitions: 6 Successful: 6 2.2 FHST Updates: Scheduled: 22 Successful: 22 2.3 Operations Notes: Using ROP SR-1A, the SSR EDAC error counter was cleared four times. The engineering status buffer limits were adjusted twice per ROP DF-18A. TTRs were written when re-transmits were required at 253/1205Z and at 253/1950Z during NSSC-1 uplinks. In each case ROP NS-5 was used to reset SI C&DH errors. The ephemeris table was loaded at 254/0049Z as directed by ROP DF-07A. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /CAW