HUBBLE SPACE TELESCOPE DAILY REPORT #1124 PERIOD COVERED: 0700 EST Daily Status Report as of 113/1200Z. 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed WF/PC-2 5560 (WF/PC-2 Cycle 4 Calibration: Internal Monitor. 1) The WF/PC-2 was used to make several internal bias, K-Spot, and flat calibration observations to monitor the CCD camera electronics, the optical alignment, and for contamination. A total of ten images were taken. They all were reported to be nominal. No anomalies were noted. 1.2 Completed Three Sets of GHRS/1 5593 (GHRS ECH-A Blaze Function Calibration: Cycle 4) The High Resolution Spectrograph was used to make blaze function (aka ripple function) tests of the Echelle-A grating using standard star MU-Columbae. The observations were made at several carrousel position settings. Ten observations were received and displayed in the OSS. They all were reported to look nominal. There was one recentering during one of the exposures. 1.3 Completed Two Sets of WF/PC-2 5476 (Continuum Snapshot of 3CR Radio Galaxies) The WF/PC-2 was used to make snapshot images of radio galaxies 3C215.0 and 3C327.0 as part of a continuum survey and to study the galaxies' morphology. Four images were received and displayed. All four were reported to look okay. 1.4 Completed Two Sets of WF/PC-2 5397 (Determination of the Extragalactic Distance Scale: Cycle 4 High) The WF/PC-2 was used to make images of galaxies NGC-4321 and NGC-5457-FL to help establish the Hubble constant to an accuracy of better than 10% by measuring the periods of Cepheid variable stars within the galaxies. The images were received and displayed. They were reported to look fine. 1.5 Completed Two Sets of WF/PC-2 5570 (WF/PC-2 Cycle 4 Calibration: Earthflats, Large Set) The WF/PC-2 was used to make a set of Earth flat calibration images using different filters in order to construct high quality flat fields of the OTA illumination pattern. A total of eight images were received and displayed. Four images were reported to be okay, one was saturated, one was underexposed, and two remain on the science tape recorder. No anomalies were noted. 1.6 Completed WF/PC-2 5415 (The Distance to the M-96 Galaxy Group: Cycle 5 Medium) The WF/PC-2 was used to make observations of Cepheid variable stars within the galaxy NGC-3368 which itself is located in the M-96 galaxy cluster. This is to help determine the distance to this galactic group, and to improve the determination of the Hubble constant. Two observations were taken, one was received and displayed, and the other remains on the science tape recorder. No anomalies were noted. 1.7 Completed FOC/96 5517 (FOC Absolute Sensitivity: Cycle 4 ) The Faint Object Camera (f/96) was used to make absolute sensitivity measurements using standard ultraviolet target star BD+75D325. The decision observation was received in real time without problems. A SIP corrective maneuver was successfully uplinked to the spacecraft. The observations were executed in fine lock. No anomalies were noted. 1.8 Completed GHRS/1 5542 (GHRS Side One Wavelength (1st Order Gratings): Cycle 4) The High Resolution Spectrograph (Side One) used the spectral calibration lamp (Side Two) to calibrate the Side One characteristics. The observations were executed as scheduled, and no anomalies were noted. 1.9 Completed GHRS/2 5473 (The Interstellar Abundance of Krypton: Cycle 4 High) The High Resolution Spectrograph was used to make observations of the star Delta Scorpii which is an O/B class star to study the abundance of Krypton to provide information about stellar nucleosynthesis and stellar evolution. The onboard target acquisition was successful. No problems were seen during the execution of the observations. The science data still remains on the science tape recorder. 1.10 Completed Two Sets S/C/WF/PC-2 5612 (SMOV WF/PC-2 Decontamination) The WF/PC-2 was used to perform decontamination operations. Observations of standard star A+81D266, and K-Spot observations were also taken. A total of nine observations were monitored and displayed. All of the observations were reported to be nominal. On the first set of observations the TEC turn-off and heatpipe heater turn-on were monitored. The cold junction temperatures were seen to rise to +22 dec C, and then stabilize. On the second set of observations The WF/PC-2 heat pipe were turned off. The cold junction temperatures started to drop almost immediately. The TECs were then turned on, and the cold junction temperatures seemed to stabilize at -88 deg C. 1.11 Completed FOC/96 5377 (UV Observations of Pulsars: Cycle 4 Medium) The Faint Object Camera (f/96)was used to make ultraviolet observations of the known X-Ray pulsar PSR0950+08 to see if its ultraviolet flux matches with the model of neutron star atmospheres. Three observations were received and displayed. They were reported to look okay. 1.12 Completed FGS 5338 (Linking the HIPPARCOS to the Extragalactic Reference Frame, NEWHIP-D) The FGSs were used to make astrometric observations of the extra-galactic object NEWEGOD-61. These observations are to help tie the HIPPARCOS and extra-galactic reference frames together at the 0.0005 arcsecond and 0.0005 arcsecond/year level. Six out of the eleven observations occurred during AOS. Of these, two were reported to have failed to acquire the target. No other anomalies were noted. 1.13 Completed Two Sets of WF/PC-2 5370 (HST Medium-Deep Survey: Cycle 4 Medium, High Galactic Latitude) The WF/PC-2 was used in parallel with the prime science observations to make high galactic latitude observations as part of a medium-deep sky survey. The main purpose of these observations is to study the evolution and structure of galaxies. Four observations were received and displayed in the OSS. There were some occasional recenterings reported. 2.0 FLIGHT OPERATIONS SUMMERY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 8 Successful : 8 Scheduled Reacquisitions : 6 Successful : 6 2.2 FHST Updates: Scheduled :21 Successful :21 2.3 Significant HSTARs: None 2.4 Operations Notes: During the past weekend, there were no significant problems in any HST subsystem. The RMGA calibration exercise, which was conducted on Friday, proceeded nominally. The DF-224 patch which modified the RWA coefficient limits, also appears to be functioning well. Plots of the vehicle position path, while the HST was in "A" telemetry format, show no evidence of wheel vehicle crossing affecting vehicle pointing. Additional data will be collected in "P" format during upcoming TDRSS services. 3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD: 3.1 Complete WF/PC-2 5092 (GTO Low Latitude Parallel Program: Cycle 4) 3.2 Complete GHRS/1 5276 (GHRS Side 1 Detector Calibration : Cycle 4) 3.3 Complete WF/PC-2 5635 (WF/PC-2 Partial Filter Stepping Test) 3.4 Complete WF/PC-2 5404 (Narrow Band Imaging of Hydrogen Poor Planetary Nebulae: Cycle 4 High) 3.5 Complete FOS/RD 5535 (Cycle 4 Internal Wavelength Calibration) 3.6 Complete Three Sets of WF/PC-2 5562 (WF/PC-2 Cycle 4 Calibration: Internal Monitor 3: Darks) 3.7 Complete WF/PC-2 1070 (High Resolution Imaging of Radio Galaxies at Large Redshift) 3.8 Complete Two Sets of WF/PC-2 5633 (Asteroid Shape and Duplicity) 3.9 Complete WF/PC-2 5560 (WF/PC-2 Cycle 4 Calibration: Internal Monitor. 1) 3.10 Complete FGS 5583 (Long Term Stability Monitoring of FGS3) 3.11 Complete WF/PC-2 5372 (HST Medium Deep Survey: Cycle 4 Medium, Low Galactic Latitude) 3.12 Complete WF/PC-2 5561 (WF/PC-2 Cycle 4 Calibration: Internal Monitor. 2: Flats) 3.13 Complete FGS 5333 (Linking the HIPPARCOS to the Extragalactic Reference Frame, BR12-23, Part 2) 3.14 Complete WF/PC-2 5370 (HST Medium Deep Survey: cycle 4 Medium, High Galactic Latitude) 3.15 Complete WF/PC-2 5415 (The Distance to the M-96 Galaxy Group: Cycle 4 Medium) 3.16 Complete WF/PC-2 5570 (WF/PC-2 Cycle 4 Calibration: Earthflats, Large Set) 4.0 ANOMALY STATUS: 4.1 Significant New Anomalies: None 4.2 Significant Unresolved Anomalies: None 5.0 SIGNIFICANT FORTHCOMING EVENTS: Nothing at this time.