HUBBLE SPACE TELESCOPE DAILY REPORT #2960 PERIOD COVERED: 0000Z (UTC) 09/19/01 - 0000Z (UTC) 09/20/01 Daily Status Report as of 263/0000Z 1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED: 1.1 Completed Two Sets of 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. 1.2 Completed Three Sets of WF/PC-2 8941 (Cycle 10 UV Earthflats) The WF/PC-2 was used to monitor flat field stability by obtaining sequences of earth streak flats to improve the quality of pipeline flat fields for the WFPC2 UV filter set. The proposal had no problems. 1.3 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. 1.4 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. 1.5 Completed WF/PC-2 9042 (An Archive To Detect The Progenitors Of Massive, Core-Collapse Supernovae) The WF/PC-2 was used to search for supernovae which have massive star progenitors. The already extensive HST archive and high-resolution ground-based images of galaxies within ~20 Mpc enables us to resolve and quantify their individual bright stellar content. As massive, evolved stars are the most luminous single objects in a galaxy, the progenitors of core-collapse supernovae should be directly detectable on pre-explosion images. One Type II progenitor has been observed this year, and the investigators have proposed a short, companion WFPC2 proposal to confirm this candidate and identify a second. The observations completed nominally. 1.6 Completed STIS/CCD/MA2 8770 (The Nucleosynthesis of Boron - Benchmarks for the Galactic Disk) The Space Telescope Imaging Spectrograph (CCD and MA2) was used to determine boron (B) abundance. In spite of several HST cycles of B abundance determinations, we do not know the true, ambient, present-day abundance of B. Only two stars {with undepleted Li and Be} have been observed to derive the Population I true B abundance. Past cycles have focused on {1} halo stars with low metallicity and {2} solar-type stars with Li and/or Be deficiencies. In this proposal, the stellar abundances of B will be determined, measured from the B I 2497 Angstrom line from STIS echelle spectra, of main sequence F-G stars that have retained their full initial abundances of boron. Our target stars are those for which ground-based observations show that beryllium is undepleted. These new abundances will map evolution of the B abundance in the Galactic disk in the metallicity range from one-third solar up to solar. Then the B, and previously determined Li and Be abundances, will be used to improve understanding of the nucleosynthesis of B. There were no reported anomalies. 1.7 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 loss-of-lock mentioned in 2.1 and described in HSTAR 8348 occurred during the final iteration of this proposal, probably affecting some of the observations. Otherwise, the observations completed with further no anomalous activity. 1.8 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. 1.9 Completed STIS/CCD/MA2 8915 (Echelle Sensitivity) The Space Telescope Imaging Spectrograph (CCD and MA2) was used to observe the flux standard G191B2B, obtaining echelle spectra in all primary and intermediate wavelength settings. The loss-of-lock mentioned in 2.1 and described in HSTAR 8348 occurred during this proposal, probably affecting some of the observations. There was no other reported anomalous activity. 1.10 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. 1.11 Completed STIS/MA1 8843 (Cycle 9 MAMA Dark Measurements) The Space Telescope Imaging Spectrograph (MA1) was used to perform the routine monitoring of the MAMA detector dark noise. The proposal completed nominally. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions: 5 Successful: 5 Scheduled Re-acquisitions: 11 Successful: 11 There was a loss-of-lock at 262/184756Z following a successful re-acquisition at 262/181009Z. HSTAR 8348 was written. The proposals detailed in 1.7 and 1.9 were affected. 2.2 FHST Updates: Scheduled: 11 Successful: 11 2.3 Operations Notes: Using ROP SR-1A, the SSR EDAC error counter was cleared twice. Per HSTAR 8347, at 242/122441Z, for one telemetry sample, the coarse sun sensor #3 temperature (GCSS3T) flagged out-of-limits low with a value of -45.0897. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /CAW