HUBBLE SPACE TELESCOPE DAILY REPORT #2038 PERIOD COVERED: 0000Z (UTC) 01/12/98 - 0000Z (UTC) 01/13/98 Daily Status Report as of 013/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed Four Sets of NIC/1/3 7813 (NIC/3 HDF Darks) The Near Infrared Camera (Cameras One and Three) was used to make internal dark calibration images which will be used when processing the Hubble Deep Field images during the first NICMOS camera 3 campaign. The observations were executed as scheduled, and no anomalies were noted. 1.2 Completed Three Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard Darks) The WF/PC-2 was used to make a series of Cycle 7 standard dark calibration images. This dark calibration program obtains 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. The observations were executed as scheduled, and no anomalies were noted. 1.3 Completed NIC/1/2/3 7608 (NICMOS Focus Monitoring) The Near Infrared Cameras (Cameras One, Two, and Three) were used to determine and monitor the optimal focus and tilt settings for all three NICMOS cameras by making images of the cluster NGC-3603. This proposal is built to run NIC1/2/3 sweeps on a 2-week basis. The observations completed without incident with no reported anomalies. 1.4 Completed STIS/CCD 7802 (Daily Darks to Update Acquisition Bad Pixel Table) The Space Telescope Imaging Spectrograph (CCD) was used to make calibration observations to obtain daily darks to update the acquisition bad pixel table. These darks are intended to identify hot pixels for update to the acquisition on-board FSW hot pixel table. Daily hot pixel lists can also be used for science data analysis. The observations were executed as scheduled, and no anomalies were noted. 1.5 Completed STIS/CCD 7711 (STIS CCD G750L Fringing Flats.) The Space Telescope Imaging Spectrograph (CCD) was used to investigate and monitor the STIS CCD flat-field fringing in the G750L grating at its nominal wavelength setting {7751A}. WAVECALs were also taken at the same gain and wavelength setting. Typical S/N = 100 for each integration, and gain = 4 on each. The observations were executed as scheduled, and no anomalies were noted. 1.6 Completed Ten Sets of STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements) The Space Telescope Imaging Spectrograph (MA2) 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. 1.7 Completed NIC/3 7919 (NICMOS Camera 3 Campaign Snapshots) The Near Infrared Camera (Camera Three) was used to make images of galaxies NGC-247 and NGC-4190 as part of the NICMOS Camera Three 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. 1.8 Completed NIC/1/2/3 7217 (GRISM Survey of Three Young Clusters) The Near Infrared Camera (Cameras One, Two and Three) was used to make observations of the young cluster called the Trapezium. Although photometric surveys have been used to great success in identifying members of embedded star clusters, significant uncertainty surrounds the mapping of broadband photometry with masses and ages of the stars. The observations were completed as planned, and no problems were reported. 1.9 Completed NIC/1/2/3 7231 (Star Formation in Orion) The Near Infrared Camera (Cameras One, Two and Three) was used to make observations of BN-IRC2 which is located in the Orion Nebula. Images of H II, FeII, and Paschen_alpha observations will be made to characterize processes associated with star formation in the Orion Nebula. As mentioned in 2.1, the acquisition for this proposal defaulted to fine lock on one FGS only. Otherwise, the observations were completed as scheduled, and no further anomalies were reported. 1.10 Completed Two Sets of NIC/1/2/3 7456 (Water in Protoplanetary Disks) The Near Infrared Camera (Cameras One, Two and Three) was used to make observations of the protoplanetary disk around stars DQ-Tau, HBC354+355 and DL-Tau to search for water in their disks. This survey will be the first to take a detailed look at the gas phase properties of pre-main-sequence disks at AU distances. The observations were completed as scheduled, and no anomalies were reported. 1.11 Completed NIC/3 7815 (NICMOS Earth Flats) The Near Infrared Camera (Camera Three) was used to make a Earth flat field calibration image. This proposal obtains a series of earth flats for a subset of narrow and medium band NIC/3 filters in advance of the NIC/3 campaign. These flats will be used to generate the master flats for narrow-band filters and to determine the OTA illumination pattern as a function of wavelength. The observations were completed as planned, and no anomalies were reported. 1.12 Completed NIC/3 7696 (NICMOS Grism Absolute Sensitivity) The Near Infrared Camera (Camera Three) was used to make some NICMOS grism absolute sensitivity calibration images by making observations of the white dwarf star P330-E. The observations were completed as planned, and no problems were reported. 1.13 Completed 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 cluster NGC-6341 which is 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. 1.14 Completed NIC/1/2/3 7322 (The IMF Below 1 Msun in Young Clusters: 1.9micron Water Band Imaging of IC348) The Near Infrared Camera (Cameras One, Two and Three) was used to make observations of cluster BD+19D5119. This study will be the first to obtain spectral types for a young cluster population complete to K=16, and thereby quantify, to unprecedentedly high precision, the IMF below 1M{sun} in young clusters. The observations were executed as scheduled, and no anomalies were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 12 Successful : 12 The acquisition at 012/1432Z defaulted to fine lock on FGS-3 only. HSTAR 6310 was written. The proposal described in 1.9 may have been affected. Scheduled Reacquisitions : 5 Successful : 5 2.2 FHST Updates: Scheduled : 24 Successful : 24 2.3 Operations Notes: There were no significant operational problems to report. 3.0 SIGNIFICANT FORTHCOMING EVENTS: Continuation of normal science observations and calibrations. /DMH