http://vo.ned.ipac.caltech.edu/vo/services/sia TARGET=m31 MAXREC=10 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

Image	1	NED/Images	1994RXCD2.T...0000C	ROSAT		44576	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/1994RXCD2.T...0000C/p009n40g:I:0.1-2.4keV:cop1994	application/x-fits	1065	MESSIER 031	9.85	40.81	2.133333333	128	128			512	512	01/01/1994		2464	2464			9.2e-10			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	2006AJ....131.2478M	Mayall		1855786	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/2006AJ....131.2478M/MESSIER_031F4:I:V:moh2006	application/x-fits	775945	MESSIER 031	10.684793	41.269066	0.62085	37.251	37.7235		1.3	8278	8383	01/01/2006		60	60			5.38676e-07			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	1995RXCD3.T...0000C	ROSAT		47334	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/1995RXCD3.T...0000C/p011n41q:I:0.1-2.4keV:cop1995	application/x-fits	1065	MESSIER 031	11.8596	41.98	2.133333333	128	128			512	512	01/01/1995		684	684			9.2e-10			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	2001ApJS..132..129M	UIT		189729	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/2001ApJS..132..129M/NGC_0221:I:FUV:mof2001	application/x-fits	8398	NGC 0224	10.3823	40.8367	0.6666666667	40	40		3	2048	2048	01/01/2001		582	582			1.5e-07			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	1995RXCD3.T...0000C	ROSAT		47310	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/1995RXCD3.T...0000C/p010n41e:I:0.1-2.4keV:cop1995	application/x-fits	1065	MESSIER 031	10.6896	41.65	2.133333333	128	128			512	512	01/01/1995		1768	1768			9.2e-10			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	1995RXCD3.T...0000C	ROSAT		47298	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/1995RXCD3.T...0000C/p009n40b:I:0.1-2.4keV:cop1995	application/x-fits	1065	MESSIER 031	9.75	40.7	2.133333333	128	128			512	512	01/01/1995		1445	1445			9.2e-10			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	2006AJ....131.2478M	Mayall		1855770	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/2006AJ....131.2478M/MESSIER_031F10:I:U:moh2006	application/x-fits	802297	MESSIER 031	10.684793	41.269066	0.623175	37.3905	37.9395		1.3	8309	8431	01/01/2006		600	600			3.552e-07			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	1983MNRAS.205..787U	Ryle		7276	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/1983MNRAS.205..787U/MESSIER_031:I:HI:u1983:ne03	application/x-fits	276	MESSIER 031	10.685152	41.269077	1.493333333	89.6	89.6		48.7	256	256	01/01/1983						0.21			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	1995RXCD4.T...0000C	ROSAT		48074	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/1995RXCD4.T...0000C/p011n41b:I:0.1-2.4keV:cop1995	application/x-fits	1065	MESSIER 031	11.05	41.45	2.133333333	128	128			512	512	01/01/1995		1692	1692			9.2e-10			phot.flux.density	NASA/IPAC/NED
Image	1	NED/Images	1995RXCD3.T...0000C	ROSAT		47340	http://vo.ned.ipac.caltech.edu/uri/NED::Image/fits/1995RXCD3.T...0000C/p011n42e:I:0.1-2.4keV:cop1995	application/x-fits	1065	MESSIER 031	11.5	42.18	2.133333333	128	128			512	512	01/01/1995		724	724			9.2e-10			phot.flux.density	NASA/IPAC/NED