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Daily 3581
HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science
DAILY REPORT # 3581 PERIOD COVERED: DOY 90 OBSERVATIONS SCHEDULED ACS/HRC/WFC 10059 CCD Daily Monitor This program consists of basic tests to monitor, the read noise, the development of hot pixels and test for any source of noise in ACS CCD detectors. This programme will be executed once a day for the entire lifetime of ACS. ACS/HRC/WFC/NIC2 9753 Morphologies of EROs and Field Galaxies in SIRTF's First Look Survey: A Rich Early Release Dataset The SIRTF First Look Survey {FLS} will be the first scientific program undertaken with NASA's next Great Observatory. The FLS provides the first large sample of dusty galaxies to redshifts to z 2 and a census of large-scale global IR properties {luminosities, color temperatures, total dust mass, etc.} HST observations to measure morphology are critical to provide insight into the mechanisms which build up the various galaxy components--disks, bulges as well as chaotic morphologies. We will measure quantitative morphology of fifty extremely red objects {EROs} with targeted NICMOS pointings and hundreds of field galaxies with ACS in parallel in the FLS. We aim to understand how EROs fit into the evolutionary sequence of galaxy formation. The combined HST and SIRTF observations will provide clues into the physical processes responsible for generating powerful far-IR sources or, conversely, may explain why some galaxies are inactive in the far-IR. Ancillary ground-based optical, near-IR, and radio data have already been obtained and DEIMOS spectra are scheduled for June, 2003. We waive the proprietary period for the HST observations and if executed early in Cycle 12 the FLS will be the first complete SIRTF+HST survey made available to the astronomical community, well in advance of the majority of the Legacy observations and all of the GTO surveys. NIC1/NIC2/NIC3 8792 NICMOS Post-SAA calibration - CR Persistence Part 3 A new procedure proposed to alleviate the CR-persistence problem of NICMOS. Dark frames will be obtained immediately upon exiting the SAA contour 23, and every time a NICMOS exposure is scheduled within 50 minutes of coming out of the SAA. The darks will be obtained in parallel in all three NICMOS Cameras. The POST-SAA darks will be non-standard reference files available to users with a USEAFTER date/time mark. The keyword 'USEAFTER=date/time' will also be added to the header of each POST-SAA DARK frame. The keyword must be populated with the time, in addition to the date, because HST crosses the SAA ~8 times per day so each POST-SAA DARK will need to have the appropriate time specified, for users to identify the ones they need. Both the raw and processed images will be archived as POST-SAA DARKSs. Generally we expect that all NICMOS science/calibration observations started within 50 minutes of leaving an SAA will need such maps to remove the CR persistence from the science images. Each observation will need its own CRMAP, as different SAA passages leave different imprints on the NICMOS detectors. NIC3 9824 NIC3 SNAPs of nearby galaxies imaged in the mid-UV: the remarkable cool stellar population in late-type galaxies. We propose a NIC3 H-band {F160W} SNAPshot survey of 48 nearby mid- to late-type galaxies covering all inclinations. In Cycle 9 and 10, we imaged ~100 galaxies in the mid-UV {F300W/F255W} and I-band {F814W} with WFPC2, and obtained UBVR CCD surface photometry from the ground. Early-mid-type galaxies show the usual small radial color-gradients, where disks become somewhat bluer at larger radii. But, remarkably, the majority of {lower luminosity, smaller and rounder} late-type galaxies shows the opposite trend and becomes redder outwards in all filters. While young UV/blue-bright stellar populations dominate their inner morphology, most late-type galaxies must have a significant halo or thick disk of older stars. Combining our proposed NIC3 H-band with existing WFPC2 images will span the wavelength range 0.29-1.6 micron at resolutions of 0.04-0.16" {FWHM}. This Panchromatic Nearby Galaxy Atlas will be applicable to a wide range of problems, and will be made public immediately. Our NIC3/F160W science goals are to: {1} Establish the nature of the old outer stellar population. All target galaxies have z0.005, allowing us to resolve any luminous, cool supergiant population. NIC3 is essential to make a pixel-to-pixel color-magnitude study of the nature, distribution and uniformity of the outer stellar populations, which will constrain dwarf galaxy formation theories. {2} Determine galaxy structure at 5-20 pc resolution, tracing the old stellar population and mass distribution compared to the star-forming regions seen in the mid-UV. A range of inclinations is needed to distinguish between old thick disks or halos in late-type galaxies. {3} Make a multi-wavelength pixel-to-pixel decomposition to help delineate the effects of dust, age, and metallicity. Since we must cover a range of inclinations, NIC3 H-band is essential to map the effects from dust, and see how these may affect the studies of {1} and {2}. STIS 9506 A SNAPSHOT SURVEY OF HIGH COLUMN DENSITY, LOW-Z LyAlpha ABSORBERS We propose a STIS G140L spectroscopic Snapshot program of bright {V=16.5} AGN not previously observed in the UV to discover new high-column density {N_H = 10^15 cm^-2} LyAlpha absorbers in the local Universe {z = 0.45}. Many more of these high column density systems are needed because: {1} They contribute most of the baryons to the local IGM; {2} They include systems for which valuable metallicity and D/H measurements can be made; {3} They include many of the ``warm-hot'' absorbers, thought to be a large baryon reservoir in the local Universe; and {4} They are most likely to be ``associated'' with galaxy halos. Because of their low-z, many of these absorbers can be located relative to galaxies of known redshifts, allowing an immediate scientific return from these snapshots. STIS 9786 The Next Generation Spectral Library We propose to continue the Cycle 10 snapshot program to produce a Next Generation Spectral Library of 600 stars for use in modeling the integrated light of galaxies and clusters. This program is using the low dispersion UV and optical gratings of STIS. The library will be roughly equally divided among four metallicities, very low {[Fe/H] lt -1.5}, low {[Fe/H] -1.5 to -0.5}, near-solar {[Fe/H] -0.3 to 0.1}, and super-solar {[Fe/H] gt 0.2}, well-sampling the entire HR-diagram in each bin. Such a library will surpass all extant compilations and have lasting archival value, well into the Next Generation Space Telescope era. Because of the universal utility and community-broad nature of this venture, we waive the entire proprietary period. STIS/CCD 10018 CCD Dark Monitor-Part 2 Monitor the darks for the STIS CCD. STIS/CCD 10020 CCD Bias Monitor - Part 2 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. STIS/CCD/MA1 9724 Towards a global understanding of accretion physics - Clues from an UV spectroscopic survey of cataclysmic variables Accretion inflows and outflows are fundamental phenomena in a wide variety of astrophysical environments, such as Young Stellar Objects, galactic binaries, and AGN. Observationally, cataclysmic variables {CVs} are particularly well suited for the study of accretion processes. We are currently carrying out a Cycle 11 STIS UV spectroscopic snapshot survey of CVs to fully exploit the diagnostic potential of these objects for our understanding of accretion physics. While the data obtained so far are of excellent quality, the number of targets that will be observed in Cycle 11 is too small for a statistically significant analysis {only 19 objects out of our 149 accepted Cycle 11 snapshot targets have been observed at the time of writing}. We propose here to extend this survey into Cycle 12, building a homogenous database of accretion disc and wind outflow spectra covering a wide range of mass transfer rates and binary inclinations. We will analyze these spectra with state-of-the-art accretion disc model spectra {SYNDISK}, testing our current knowledge of the accretion disc structure, and, thereby, providing new insight into the so far not well understood process of viscous dissipation. We will use our parameterised wind model PYTHON for the analysis of the radiation driven accretion disc wind spectra, assessing the fundamental question whether the mass loss rate correlates with the disc luminosity. In addition, our survey data will identify a number of systems in which the white dwarf significantly contributes to the UV flux, permitting an analysis of the impact of mass accretion on the evolution of these compact stars. This survey will triple the number of currently available high-quality accretion disc / wind outflow / accreting white dwarf spectra, and we waive our proprietary rights to permit a timely use of this database. WFPC2 10070 WFPC2 CYCLE 12 Supplemental Darks Part 2/3 This dark calibration program obtains 3 dark frames every day to provide data for monitoring and characterizing the evolution of hot pixels. FLIGHT OPERATIONS SUMMARY: Significant Spacecraft Anomalies: (The following are preliminary reports of potential non-nominal performance that will be investigated.) HSTAR 9364: Current spikes in STIS Input Current (CPDU1CUR) @ 090/11:31:06Z and 11:32:24Z. STIS was executing a transition from CCD Standby to Operate. SI SEs investigated STIS Input Current and did not find any current anomalies. CMNBUSAV and CMNBUSBV were also flagging OOL, as a result of Battery 2 Capacity Testing that was in progress near end of orbit night. Under investigation. HSTAR 9365: OTA SE in reviewing PTAS Processing Log for SMS SA082O, revealed GS Reacquisition (2,3,2) @ 084/16:57:59Z required two attempts before FGS-2R was able to achieve FL-DV on its GS. Under investigation. COMPLETED OPS REQs: None OPS NOTES EXECUTED: 1213-1 Tracking waiver during Battery 2 capacity test (On going through end of Batt#2 Test) SCHEDULED SUCCESSFUL FAILURE TIMES FGS GSacq 13 13 FGS REacq 05 05 FHST Update 10 10 LOSS of LOCK SIGNIFICANT EVENTS: Continued Battery 2, Two-stage Capacity Testing. Battery 2 discharge switched to Low-rate 50 O resistor (~26.09 Volts) @ 090/11:57Z. As of 091/11:00Z, discharge reached 22.4 Volts. EPS SEs continue to monitor progress from the STOCC. JSC Command Test with SOCPSS scheduled 091/12:00Z - 20:00Z with GDOC, SOC, and HITT using CCS "H" String with CCS Release 5.0.3.1 and PRD O06300ST. The purpose of this testing is to verify command capabilities for CCS Release 5.0.3.1 in JSC mode. |
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