To help users orient themselves in the DR1 data produced by OU-MER we have collected some additional metadata information on the MER tiles in FITS table. This data was accumulated as part of validating the MER DR1 products plus some additional data collected afterwards. Note that the MOSAIC_MASKED_FRACTION in (VIS, NIR-Y/J/H) is not available for all deep fields. However, deep data is composed from several patch observations, and it is
. The tables are sorted in ascending TILE_INDEX.
TILE_INDEX: the MER tile index
RA_AVERAGE [deg]: the average RA objects position of all detected objects; note that this is not the nominal central tile position; item DEC_AVERAGE [deg]: the average Dec objects position of all detected objects; note that this is not the nominal central tile position;
REFERENCE_TIME [MJD]: the median time of all Euclid input images to the MER PPO processing the tile;
PATCH_IDS: the patch ID’s of the Euclid (VIS and NIR) input data to the MER processing as a comma separated list;
FILLING_FACTOR: the fraction of healpix indices of the tile core area that contains detected objects, which is equivalent of the core area fraction covered with VIS or NIR data;
MOSAIC_MASKED_FRACTION_VIS11 1 Column not available in all tables: the fraction of invalid pixels in the VIS coadded image, which is (1.0-FILLING_FACTOR_VIS);
MOSAIC_MASKED_FRACTION_NIR_Y††footnotemark: : the fraction of invalid pixels in the NIR_Y coadded image, which is (1.0-FILLING_FACTOR_NIR_Y);
MOSAIC_MASKED_FRACTION_NIR_J††footnotemark: : the fraction of invalid pixels in the NIR_J coadded image, which is (1.0-FILLING_FACTOR_NIR_J);
MOSAIC_MASKED_FRACTION_NIR_H††footnotemark: : the fraction of invalid pixels in the NIR_H coadded image, which is (1.0-FILLING_FACTOR_NIR_H);
VIS_DETECTIONS: the number of objects detected on the VIS detection image
NIR_DETECTIONS: the number of objects detected on the NIR detection image
GAIA_MATCHES: the number of Euclid objects cross-identified in the Gaia DR3 catalog;
VIS_EXPTIME_MEAN [s]: the mean exposure time of the VIS coadded image;
NIR_Y_EXPTIME_MEAN [s]: the mean exposure time of the NIR_Y coadded image;
NIR_J_EXPTIME_MEAN [s]: the mean exposure time of the NIR_J coadded image;
NIR_H_EXPTIME_MEAN [s]: the mean exposure time of the NIR_H coadded image;
CREATION_DATE_YEARS [y]: the time the MER analysis PPO was started;
Euclid Wide Survey (EWS): DR1_EWS_MER_public.fits
EDF-Fornax (EDF-F): DR1_EDF-F_MER_public.fits
EDF-North (EDF-N): DR1_EDF-N_MER_public.fits
EDF-South (EDF-S): DR1_EDF-S_MER_public.fits
Photo-z calibration field COSMOS: DR1_COSMOS_MER_public.fits
Photo-z calibration field CDFS: DR1_CDFS_MER_public.fits
Colour stability field AEGIS: DR1_AEGIS_MER_public.fits
Self-calibration field SELFCAL: DR1_SELFCAL_MER_public.fits
Calibration field contamination F-014: DR1_F-014_MER_public.fits
Phase diversity calibration field ILS-WAVES-S: DR1_ILS_MER_public.fits
Phase diversity calibration field SSO-ECLIPTIC: DR1_SSO_MER_public.fits
Phase diversity calibration field EMDS-HSC-HL-3: DR1_HSC3_MER_public.fits
Phase diversity calibration field EMDS-HSC-HL-4: DR1_HSC4_MER_public.fits
The overview files are distributed as part of the DR1 calibration data repository. For access, connect via sftp to:
sftp anonymous@ftp-bdt.cosmos.esa.int
Login with your email address and then change to:
cd EUC_DR1_CAL
to enter the area of the Euclid data.