منابع مشابه
WFPC 2 Standard Star CTE
Observations of the WFPC2 standard star GRW+70D5824 were made at five positions along the diagonal of each detector to directly evaluate CTE effects on standard star data. Two filters commonly used for standard star monitoring, F170W and F555W, were tested. The data were subsequently corrected with the Dolphin CTE equations, and the results were studied for any residual variations in photometry...
متن کاملWFPC 2 - 2002 - 05 SMOV 3 b WFPC 2 Lyman - α Throughput Check
The far-UV throughput of WFPC2 was monitored on March 23, 2002 for any signs of unexpected throughput degradation following Servicing Mission 3b. No significant changes were detected.
متن کاملWFPC 2 Dark Current vs . Time
Ongoing measurements of the dark current in the WFPC2 detectors indicate that the average level of dark current has been slowly increasing over the instrument's lifetime. We have analyzed more recent dark current data, now covering the period from September 1994 to January 2001. This analysis shows that after late-1998, the dark current is increasing more slowly than expected and could possibly...
متن کامل2 Morphological LDs with HST WFPC
Evolution of the morphological luminosity distributions within rich clusters (0.0 < z < 0.55) We demonstrate the ability to recover morphological luminosity distributions (LDs) within medium redshift clusters (z ∼ 0.55) based on Hubble Space Telescope WFPC2 observations. We postulate that a detailed survey of the morphological LDs in local, low and medium redshift clusters may provide strong co...
متن کاملExtragalactic 2–10 keV source counts from a fluctuation analysis of deep BeppoSAX MECS images
We present an analysis of the spatial fluctuations of the 2-10 keV Cosmic X-ray Background (CXB) as measured from 22 high galactic latitude (|b| > 25◦) fields observed with the MECS instrument on-board BeppoSAX. This technique allowed us to probe extragalactic source counts a factor 3-4 fainter than is possible with direct measurements of pointlike sources in MECS deep fields. The slope of the ...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 1992
ISSN: 1539-2996
DOI: 10.1017/s1539299600009540