http://vo.ned.ipac.caltech.edu/vo/services/sia TARGET=m31 MAXREC=0 Type of product, default is Image, we may add Cube, Spectra, Redshift, Diameters Calibration level (0,1,2,3) Default is 1. Short name for the data collection. Observation ID/REFCODE, in NED it is unique bibliographic reference. Telescope name Instrument name Observation ID, in NED it is unique image id. URL to download the data Format of the data file(s) Estimated size of the download Name of intended target RA of target DEC of target Size of the region covered (in NED it is minimum of the fov1 and fov2) Size of the FOV1 in arcminutes. Size of the FOV2 in arcminutes Region bounded by observation Typical spatial resolution Dimensions along one spatial axis Dimensions along the other spatial axis Start time of observation End time of observation Exposure time of observation Typical temporal resolution Start spectral coordinate value Stop spectral coordinate value Wavelength of the center of spectral coverage in meters Typical spectral resolution Polarization states present in the data UCD describing the observable axis (pixel values) Publisher dataset identifier