XCOPRAW - Copernicus X-Ray Observations
The files accessible from this database are in FITS format. The layout consists of one extension bintable containing scientific and housekeeping data. The data are organized in each FITS file with the same content of the original file in its native format, where typically several files contribute to one observation.
A total of 131 files no matching object name were found in any of the catalogs searched. These entries can be identified by the parameter CATID1 and CATALOG set both to 'NONE' and the RA and DEC at 1950 equinox set to blank.
Offset observations respect to a source position have coordinates equal to the that source position (e.g. 3U1743-29PT3 is MX1743-29 or PUPPIS A (3) is PUPPIS A).
The objects 4U1658-58 and 2U2630-47 have been identified with 4U1658-48 (GX339-4) and 4U1630-47 since there is no record in the 4U catalog of 4U1658-58 and 2U2630-47 is a typo.
The original file structure contained an header followed by the data records. Two types of header record were present in the file storing different parameters. A string set to HEAD or SL identified the header type. The SL data are raster scan around a source position and the original SL header record did not contain either coordinates or object name. The RA_OBJ, DEC_OBJ, OBJECT keywords, in fits file with IDHEADER=SL, are retained from the HEAD observation immediately preceeding (in time) the current SL file.
The observation log was in a form of microfilm and not usable to extract easily coordinates. However we converted the microfilm to gif files (one gif for each microfilm frame). These files are available in the Copernicus FTP area in the HEASARC archive and they can be used to verify the exact pointing.
Object name given by the original data record.
Right ascension associated to the catalog object name that matches best the object name in the data file. The catalog object name is stored in the parameter CATID1.
Declination associated to the catalog object name that matches best the object name in the data file. The catalog object name is stored in the parameter CATID1.
Galactic longitude derived from RA and Dec.
Galactic latitude derived from RA and Dec.
This parameter contains the object name found in a catalog that matches best the object name in the data file. The parameter CATALOG contains the catalog or server name.
This parameter contains the catalog (or server) name used to match the object name in the data file. The possible values are listed below.
XRBCAT catalog available at HEASARC VERON96 catalog available at HEASARC NGC2000 catalog available at HEASARC 4UHURU Forman et al., 1978 Ap.J.Supp.S., 38,357 3UHURU Giacconi et al., 1974 Ap.J.Supp.S.,27,37 2UHURU Giacconi et al., 1972 Ap.J. 178, 281 BSC catalog available at HEASARC HIC catalog available at HEASARC HD catalog available at HEASARC COP_PEP Positions listed in the archive of UV experiment on Copernicus "Princeton Experiment Package" SIMBAD using the name server ULC_OBS ULC observation log
Stored a string that indicates the header type in the original data. The allow value are "HEAD", "SL ", or "SLEW" and they indicates the following differences
HEAD - Object name given in the header of the original file. SL - No object name given SLEW - Object name is "SLEW".
Number of rows in the data file.
Time elapsed during observation (TELASPE = TSTOP - TSTART) given in seconds.
Observation start date stored as a string.
Observation end date stored as a string.
Observation start stored as numerical value (browse SHF or W3browse MJD).
Observation stop stored as numerical value (browse SHF or W3browse MJD).
Total counts in the 1-3 Angstrom detector. This is the sum of all counts for the 1-3 A detector in the file.
Total counts in the 3-9 Angstrom detector. This is the sum of all counts for the 3-9 A detector in the file.
Total counts in the 6-18 Angstrom detector. This is the sum of all counts for the 6-18 A detector in the file.
Total counts in the CPM detector.This is the sum of of all counts for the CPM A detector in the file.
Average counts in the 1-3 A detector counts obtained as AVECN13 = TOTCN13/NUM_ROWS.
Average counts in the 3-9 A detector counts obtained as AVECN39 = TOTCN39/NUM_ROWS.
Average counts in the 6-18 A detector counts obtained as AVECN618 = TOTCN618/NUM_ROWS.
Average counts in the CPM A detector counts obtained as AVECNCPM = TOTCNCPM/NUM_ROWS.
Average 1-3 A guard counts obtained as AVEGC13 = TOTGCN13/NUM_ROWS, where the TOTGCN13 is the total number of guard counts (not recorded in this database).
Average 3-9 A guard counts obtained as AVEGC39 = TOTGCN39/NUM_ROWS, where the TOTGCN39 is the total number of guard counts (not recorded in this database).
Average 6-18 A guard counts obtained as AVEGC618 = TOTGCN618/NUM_ROWS, where the TOTGCN618 is the total number of guard counts (not recorded in this database).
Time Difference between Rows Mean
Minimun time difference between rows in the FITS file, for this entry, given in seconds (for internal use).
Maximum time difference between rows in the FITS file, for this entry, given in seconds (for internal use).
FITS filename root. Used to extract the file from W3browse. The files are named with the following convention uclYYDDDHHMM_h/s#### where
ucl - YY - Year. DDD - Day of year number. HH - Hour. MM - Minute. h/s - "h" for HEAD record, "s" for SL or SLEW record. #### - Chronological file number.
FITS file location and name root used to extract the file from browse. The naming convention is uYYDDDDDD/uclYYDDDHHMM_h/s#### where
u - YY - Year. DDDDDD - First three DDD day of earliest file second three last day or latest file in directory. ucl - YY - Year. DDD - Day of year number. HH - Hour. MM - Minute. h/s - "h" for HEAD record, "s" for SL or SLEW record. #### - Chronological file number.