Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999stin...0012868w&link_type=abstract
Technical Report, Star Formation from the Small to the Large
Astronomy and Astrophysics
Astrophysics
Calibrating, Open Clusters, Star Clusters, X Ray Astrophysics Facility, X Ray Astronomy, Spaceborne Astronomy, Boresights, Rosat Mission
Scientific paper
The Chandra observatory was Launched July 23 1999. The first two months of the mission have been spent performing on-orbit calibration. This phase of the mission has included about 60 Ks of observing time on the young cluster NGC 2516. The observations have been made as part of the measurements of the boresight and the plate-scale of the various instruments. These observations will augment planned (deeper) GTO observation of this cluster. Here we present the results of these early observations. As of September 7, in a single ACIS 5'x5' field (one backside chip) examined 26 sources were detected in a single 10 Ks exposure. This represents less than one sixth of the total exposure time and less than one sixth of the total area to be observed during the calibration phase. we will compare the characteristics of those sources detected with Chandra with those detected by ROSAT. Since these observations are being made using all detectors, we will also compare observations among the various detectors.
Evans Nancy
Favata Fabio
Harnden Rick F.
Jeffries Robin D.
Schachter Jon
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