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XMM-Newton Science Analysis System


xmmselect (xmmselect-2.64.9) [xmmsas_20070708_1801-7.1.0]

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Column selections

Four types of scalar columns are distinguished: integer, real, string, and boolean. Vector columns of any kind (fixed or variable length) are ignored. The extraction of images, histograms, spectra, and rate curves requires the specification of one or two numerical columns as detailed in the following table:

type of product	number of columns	type of columns
	(axes in product)
image	2	integer or real
histogram	1	integer or real
OGIP spectrum	1	integer
OGIP rate curve	1	real

Columns can be selected for usage in a product extraction if their type is of appropriate type according to the above table. The two columns with check buttons to the left of the push-buttons serve this purpose. The left column refers to the image and the right one to the histogram, spectrum and rate curve generation. Note: For the latter only one table column can be selected at a time while for the image extraction two columns need to be specified.