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: http://xmm.vilspa.esa.es/sas/7.1.0/doc/eootemap/node4.html
Дата изменения: Mon Jul 9 08:51:24 2007 Дата индексирования: Sat Dec 22 09:45:54 2007 Кодировка: Поисковые слова: rings |
Parameter | Mand | Type | Default | Constraints |
expcubeset | yes | dataset | ||
Dataset which contains an exposure map cube. See the eexpchipmap
task documentation for a description of the format of this file.
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style | no | string | evlist | evlist|srclist |
Whether to construct the OOTE image directly from the event list or indirectly from a source list. Both styles have advantages and disadvantages. Use of the event list is better in most circumstances. A source list should be used only if it is known that a significant contribution to the OOTEs on a CCD is made by a source which is outside the data window of that CCD.
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eventset | yes | dataset | ||
Name of the event list dataset used to construct the OOTE image. This parameter is read if style=`evlist'.
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srclisttab | yes | table | ||
Name of the source list dataset and table used to construct the OOTE image. This parameter is read if style=`srclist'.
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outputstyle | no | string | sky | sky|raw |
If `sky', the OOTE map is output in sky coordinates, to the file referred to by parameter ooteimageset. In this case a template set (templateset) is needed and the attstyle parameter is also read. If outputstyle=`raw' on the other hand the output is written to a cube (in the expcubeset format) to the file pointed to by ootecubeset.
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templateset | yes | dataset | ||
This parameter is read if outputstyle=`sky'. This file should contain an image in the primary extension, which is used to define the pixel dimensions and World Coordinates of the output image.
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ooteimageset | no | dataset | noisemap.ds | |
An output image in sky coordinates is written to this file name if outputstyle=`sky'.
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attstyle | no | string | binnedset | binnedset|template |
This parameter is read if outputstyle=`sky'. To convert from chip to sky coordinates it is necessary to know the spacecraft attitude. However the attitude is never completely stable and may vary significantly during an exposure. In this case the nett sky image must be a mosaic of components from different values of the attitude. A time series of attitude values (such as that made either by attbin
or evproject) can be supplied to parameter binnedattset if attstyle is set to `binnedset'. If it is judged that the attitude wander during the exposure did not exceed some small fraction of the image pixel dimensions, or if the binned attitude set is not available, then the user may choose to set attstyle to `template' instead. In this case a single fixed value of attitude is read from *_PNT keywords in the template image header.
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binnedattset | yes | dataset | ||
If attstyle=`binnedset' the user should supply to the present parameter the name of a dataset which contains a time series of the spacecraft attitude variation during the exposure.
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ootecubeset | no | dataset | noisemapcube.ds | |
An output image cube in chip coordinates is written to this file name if outputstyle=`raw'.
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selexprstyle | no | string | userranges | userranges|dss|userexpr |
Use of task eootemap
implies that the user wishes to model the background component of a real image. To do this properly it is necessary that the OOTE map and the image reflect the same selection of events. It is therefore necessary to provide details of the event selections used to construct the real image. Ideally the user should supply these in the form of the Data Subspace (DSS) of the actual image by selecting selexprstyle=`dss' and then supplying the file name of the image with the DSS to parameter dssset. However it has been found convenient to also allow the user to supply the event selection expression directly (via expression) or simply to choose to supply a set of energy ranges. The latter can be done by selecting selexprstyle=`userranges' and then supplying lists of values to evlo and evhi. Note that in this circumstance the assumption is made that no other significant non-spatial selections were made to create the original image.
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evlo | yes | real list | ![]() | |
I selexprstyle=`userranges', a set of lower energy bounds is read from this parameter. Note that evlo and evhi must have the same (non-zero) number of elements; the elements of both parameters must occur in increasing order; and no evlo value may be ![]() | ||||
evhi | yes | real list | ![]() | |
I selexprstyle=`userranges', a set of upper energy bounds is read from this parameter. Note that evlo and evhi must have the same (non-zero) number of elements; the elements of both parameters must occur in increasing order; and no evlo value may be ![]() | ||||
dssset | yes | dataset | ||
I selexprstyle=`dss', information about event selections is sought in a Data Subspace (DSS) of the primary extension of this dataset.
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expression | yes | string | ||
This parameter is read if selexprstyle=`userexpr'. It should contain the selection expression used to construct the original image.
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Parameter | Mand | Type | Default | Constraints |