HUBBLE SPACE TELESCOPE DAILY REPORT #2154 PERIOD COVERED: 0000Z (UTC) 06/26/98 - 0000Z (UTC) 06/29/98 Daily Status Report as of 180/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Three Sets of STIS/CCD 7926 (CCD Dark and Bias Monitor -- Continued) The Space Telescope Imaging Spectrograph (CCD) was used to make several dark and bias calibration observations. This is to measure CCD dark current and bias rates for the two supported amplifier settings {gain = 1 and gain = 4} in order to gather data for making superdarks and superbiases. These observations will also track the growth of hot pixels on the CCD in general and within the various target acquisition apertures specifically. During the second iteration of this proposal, a re-acquisition fine lock backup to control on one FGS only occurred, possibly affecting one observation. Otherwise, the observations were executed as scheduled, and no further anomalies were noted. 1.2 Completed STIS/MA1 7604 (Cycle 7 MAMA Dark Measurements) The Space Telescope Imaging Spectrograph (MA1) was used to make MAMA dark measurements. These darks will be used in later image reductions and also trended over the instrument's life time as an indicator of the detector's degradation or damage. The observations were completed as scheduled, and no problems were reported. 1.3 Completed Four Sets of NIC/3 7919 (NICMOS Camera 3 Campaign Snapshots) The Near Infrared Camera (Camera Three) was used to make images of galaxies NGC-4102, NGC-4026, NGC-925 and NGC-6822 as part of the NICMOS Camera 3 campaign snapshots. The proposal is to obtain wide field snapshot images of nearby galaxies in Paschen Alpha which is inaccessible from the ground. The observations were executed as planned, and no anomalies were reported. 1.4 Completed Fourteen Sets of STIS/CCD 7908 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal) The Space Telescope Imaging Spectrograph (CCD) was used to make calibration observations as part of the POMS Test Proposal. This was a STIS non-scripted parallel proposal. During the fifth to the ninth iteration of this proposal, the re-acquisition fine lock backups to control on one FGS only occurred, possibly affecting eight observations. Otherwise, the observations were completed as planned, and no further problems were reported. 1.5 Completed Two Sets of NIC/1/2/3 7265 (The Metallicity Distribution of the Globular Cluster Systems of Giant Elliptical Galaxies) The Near Infrared Camera (Cameras One, Two and Three) was used to make integrated broadband photometry observations of the globular cluster systems in the giant elliptical galaxies NGC-6166 and NGC-3842 in order to study their metallicity. These observations will have a significant impact on our understanding of the origin and nature of globular cluster systems in galaxies. During the second iteration of this proposal, the re-acquisition fine lock backups to control on one FGS only occurred, possibly affecting seven observations. Otherwise, the observations were executed as scheduled, and no further anomalies were noted. 1.6 Completed Seven Sets of WF/PC-2 7909 (POMS Test Proposal: WF II Parallel Archive Proposal) The WF/PC-2 was used to make parallel observations as part of the POMS test proposal. This test proposal is designed to simulate scientific plans. During the fourth through the seventh iteration of this proposal, the re-acquisition fine lock backups to control on one FGS only occurred, possibly affecting ten observations. Otherwise, the observations were completed as planned, and no further problems were reported. 1.7 Completed Two Sets of NIC/1/2/3 7318 (Ages of Extreme Metallicity Globular Clusters Near the Galactic Center) The Near Infrared Camera (Cameras One, Two, and Three) was used to make observations of the globular clusters PAL6-1 and LILLER1-CO which are located near our galactic center in order to determine the age of this extreme metallicity cluster. Failure to detect an age difference will imply that star formation and chemical enrichment occurred rapidly in the inner halo if the clusters shared a common origin. The observations were completed as planned, and no problems were reported. 1.8 Completed NIC/3 7830 (IR Spectra for Known-Mass M Dwarfs) The Near Infrared Camera (Camera Three) was used to make infrared spectrographic observations of M-Class dwarf star GJ748AB. Over the last decade there has been considerable debate on two major issues in the low-mass star literature: {1} the effective temperature scale for M dwarfs and its relation to mass and luminosity and {2} the conversion from an absolute magnitude in some passband to a bolometric magnitude. The observations were executed as scheduled, and no anomalies were noted. 1.9 Completed WF/PC-2/NIC/3 7563 (Francis Cluster) The WF/PC-2 and the Near Infrared Camera (Camera Three) was used to make observations of the cluster Gal-Clus-2 (a.k.a., Francis Cluster) using various modes. A wavelength calibration image was also taken. The observations were completed as planned, and no anomalies were reported. 1.10 Completed WF/PC-2 7619 (WF/PC-2 Cycle 7 Decontamination) The WF/PC-2 was used to conduct a Cycle 7 decontamination procedure. Ultraviolet-blocking contaminants were removed, and hot pixels cured, by warming the CCDs to +20C for 6 hours. A variety of internal images were taken before and after the decontamination in order to verify its success and to monitor the instrument health. The procedures were conducted as scheduled, and no problems were reported. 1.11 Completed NIC/1/2/3 7874 (The Shells of NGC 5128: Debris from a Recent Merger) The Near Infrared Camera (Camera One, Two and Three) was used to make observations of the shells of NGC-5128. At a distance of about 3.6 Mpc, NGC 5128 {= Cen A} is the closest high-luminosity AGN, the closest radio galaxy, the closest giant elliptical and one of the closest and best examples of a merger remnant. The observations were completed as planned, and no anomalies were reported. 1.12 Completed WF/PC-2 7618 (WF/PC-2 Cycle 7 Photometric Monitor UV/OPT STD) The WF/PC-2 was used to make observations of the standard star GRW+70D582 as part of a Cycle 7 photometric monitoring program. This ultraviolet spectrophotometric standard star was observed in a variety of filters and cameras to monitor the photometric stability and quantum efficiency of WF/PC-2 from the far-ultraviolet to near-infrared. The observations were completed as scheduled, and no problems were reported. 1.13 Completed NIC/3 7237 (Nucleus and Inner Disk OF M-51) The Near Infrared Camera (Camera Three) was used to make observations of the nuclear regions within the galaxy M-51 (A.K.A., The Whirlpool Galaxy in Canus Venatici). M-51 is the nearest grand design spiral galaxy {9.5 Mpc, 0.15" corresponds to 8 pc} with strongly enhanced star formation along the spiral arms and evidence of a central low luminosity AGN. A dark calibration image was also taken. The observations were completed as scheduled, and no problems were reported. 1.14 Completed NIC/1/2/3 7901 (NICMOS Post-Campaign Focus Monitoring) The Near Infrared Camera (Camera One, Two and Three) was used to make some post-campaign focus monitoring observations by using star cluster NGC-3603. This proposal is used to determine and monitor the optimal focus and tilt settings for all three NICMOS cameras after the first NIC/3 observing campaign. As described in 2.3, images obtained by this proposal were lost. Otherwise, the observations were executed as scheduled, and no further anomalies were noted. 1.15 Completed Three Sets of WF/PC-2 7623 (WF/PC-2 Cycle 7 Internal Flats) The WF/PC-2 was used to make a set of internal Cycle 7 calibration flats which are designed to monitor the pixel to pixel flat field response and the visflat lamp degradation, as well as detect any possible changes due to contamination. The calibration observations were completed as planned, and no problems were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 20 Successful : 20 Scheduled Reacquisitions : 23 Successful : 23 The re-acquisition at 177/203017Z and the following re-acquisitions at 177/213442Z, 177/231127Z, 178/004814Z, and 178/022459Z all defaulted to fine lock backup on FGS-3 only when the FGS-1 PMT counts were low. HSTAR 6560 was written. The proposals described in 1.1, 1.4, 1.5, and 1.6 may have been affected. 2.2 FHST Updates: Scheduled : 41 Successful : 41 2.3 Operations Notes: Using ROP SR-1, the SSR EDAC error counter was cleared six times. The NICMOS Camera Three Campaign concluded with a secondary mirror move of -15.2 microns (toward the primary mirror), returning the secondary mirror to the nominal focus position of +1.5 microns. This action was concluded at 179/1739Z as directed by operations request 13848. The NICMOS flight software (FSW) 4.0B, loaded on day 176, was activated at 179/1954Z using operations request 13853. After the activation and during the first NICMOS image dump, status buffer messages were received indicating that the NICMOS science interface was disabled. The interface was disabled during the execution of the PSTOL, NMDMPRAW, which performed the memory dump. There was a known error in the PSTOL and, upon termination, the science data interface was never enabled. During activation testing this problem was not noticed since collecting science images was not part of the script. The PSTOL is normally executed when NICMOS suspends and a memory dump is collected. The problem is not seen when this occurs because the separately commanded transition of NICMOS from suspend to hold re-enables the interface. It was seen in this instance because the transition from boot to operate doesn't include the commands necessary to re-enable the interface. HSTAR 6562 was wriiten to document the event and to ensure that the NMDMPRAW is corrected. Until that correction is made, the PSTOL will only be used during NICMOS suspend events. The science data interface was re-enabled at 179/2319Z and the status buffer was reset, and 100 images in the buffer were dumped at 179/2339Z. The problem was not cleared in time to save all images. An additional 295 images were lost, all for the proposal described in 1.14 above. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH