METADATA Information Search Position in the form "ra, dec" where ra and dec are given in decimal degrees in the ICRS coordinate system Size of search region in the RA and Dec. directions Request format of image Choice of overlap with requested region Verbosity level, controlling the number of columns returned Telescope name Instrument name OBS ID Instrument nameRight ascension of barycenter (native)Right ascension of barycenter (native) Filter name Exp. Time (s) Airmass begin Number of image axesSize in each axeSize of the image