The Copernicus Archive
The Copernicus archive at HEASARC includes the Raw data from the UCLX experiment restored in FITS by the HEASARC. No other data are available from the HEASARC archive.
The Copernicus UCLXE raw data can be selected using the database XCOPRAW available from Browse or directly from the Copernicus FTP area in the HEASARC archive. Data from the UV experiment are available from the STSci archive .
The RAW Copernicus UCLXE data : The original file structure contained an header followed by the data records. Two types of header record were present in the original file storing different parameters. A string set to HEAD or SL identified the header type. The HEAD data are pointed to a source position, instead the SL data are raster scan around the source position. The data records contain the scientific data from all 4 instruments, HK data and pointing constraints. Typically several files contribute to one observation. The data are organized in each FITS file with the same content of the original file. The FITS layout consists of one extension bintable containing both scientific and housekeeping data. The scientific data are stored in the columns CNT_1_3, CNT_3_9, CNT_6_18 and CNT_CPM and are from the 1-3 Å, 3-9 Å, 6-18 Å and the channeltron detectors respectively. There are in total 6563 FITS files. A few data records in the original files had unrecoverable errors. This is less 1 % of the total archive.
The native format of the Copernicus UCLXE data did not contain
the pointing position but only the source name and the observation log
was not available in a suitable format when the FITS files were created.
The coordinates in the fits file were mostly obtained by cross-correlating
the object name with various catalogs available from HEASARC and SIMBAD
and with the object name listed in the archive of the UV experiment,
Princeton Experiment Package, on Copernicus.
The FITS files includes data also taken with a 6 channel Pulse Height Analyzer connected with one of the 3 proportional counters, however no response matrix is available to analyse the spectra.
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Last modified: Thursday, 26-Jun-2003 13:48:54 EDT