vsx_vizier

stellarphot.core.vsx_vizier(field_center, radius=<Quantity 1. deg>, clip_by_frame=False, padding=100, magnitude_limit=None, magnitude_limit_passband=None)

Return the items from the copy of VSX on Vizier that are within the search radius and (optionally) within the field of view of a frame.

Parameters:

field_centerastropy.coordinates.SkyCoord, astropy.wcs.WCS, or FITS header

Either a SkyCoord object, a WCS object or a FITS header with WCS information. The input coordinate should be the center of the frame; if a header or WCS is the input then the center of the frame will be determined from the WCS.

radiusastropy.units.Quantity, optional

Radius around which to search.

clip_by_framebool, optional

If True, only return items that are within the field of view of the frame.

paddingint, optional

Coordinates need to be at least this many pixels in from the edge of the frame to be considered in the field of view. Default value is 100.

magnitude_limitfloat, optional

If provided, only return items with a brightest magnitudes less than or equal to this value.

magnitude_limit_passbandstr, optional, default is “max”

There is no straightforward way to limit the VSX catalog by passband. The magnitude limit will be applied to the variable star’s magnitude at maximum brightness, and the only valid value for this parameter is “max”.

Returns:

stellarphot.CatalogData

Table of catalog information.