2 CDA ivo://cxc.harvard.edu/cda Chandra X-ray Observatory Chandra X-ray Center Chandra Data Archive, Chandra X-ray Center

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archelp@cfa.harvard.edu X-ray astronomy galaxies quasars stars X-ray photometry spectroscopy variability The Chandra X-ray Observatory is the U.S. follow-on to the Einstein Observatory. Chandra was formerly known as AXAF, the Advanced X-ray Astrophysics Facility, but renamed by NASA in December, 1998. Originally three instruments and a high-resolution mirror carried in one spacecraft, the project was reworked in 1992 and 1993. The Chandra spacecraft carries a high resolution mirror, two imaging detectors, and two sets of transmission gratings. Important Chandra features are: an order of magnitude improvement in spatial resolution, good sensitivity from 0.1 to 10 keV, and the capability for high spectral resolution observations over most of this range. https://cxc.harvard.edu/cda/ Archive Research University Community College derived-from Chandra Data Archive https://cda.harvard.edu/cxcscs/coneSearch? GET text/xml 10 100000 true 150.48 72.17 0.1 https://cda.harvard.edu/cxctap ADQL 2.0 ADQL 2.0 text/tab-separated-values text text/xml votable 100000 https://cda.harvard.edu/cxctap/capabilities GET application/xml https://cda.harvard.edu/cxctap/availability GET application/xml https://cda.harvard.edu/cxctap/tables GET application/xml https://cdaftp.cfa.harvard.edu/cxc-hips 0.25 X-ray